T R A N S F O R M E R S April 2014 Transformers for Switching Power Supplies Pin terminal type (For multiple outputs) ECO series ECO20 Vertical/Horizontal types ECO22 Vertical/Horizontal types ECO24 Vertical/Horizontal types (2/34) T R A N S F O R M E R S An attention matter on use Please read this specifications before using this product by all means. An attention matter on security I undertake use with this product, and it is paid attention enough, and please design an attention matter safely. Attention on a design When you designs a base of an electric circuit. Please use size of the hole or pad which we recommend. Magnetic flux to leak out occurs. Please confirm it about influence of magnetic flux beforehand. There is fear to cause false movement of machinery. In a design of a base of an electric circuit, Please consider the next contents. In an applied safe standard. The trans and distance with other parts The product is not quakeproof structure. Accordingly please do not add vibration and a shock to it. There is fear to lose a function. Attention on the handling Please do not use it when you let a product drop. The product produces possibility to lose a function Please pay attention to the pin which had it pointed keenly. There is danger to injure. Please avoid the next place. The place that receives a drop of water, trash, the dust, foggy influence. The place where direct rays of the sun hits. There is fear to cause false movement of machinery. Please prohibit safekeeping and use at the next place. Environment to be accompanied with gas corrosion, salt, acid, alkali. There is fear to lose a function. When you carry the product on a base of an electric circuit. Please do not use a metal tool. Because impossible power is added to a product. There is fear to lose a function. Attention I considered the next matter, and we designed a product. Safe standard and power supply voltage and circuit drive condition, drive frequency and Duty ON-TIME. By those conditions, we decided structure and the turns number. Please avoid use in designed condition outside. There are destruction of a circuit part and fear of ignition. This product considered a characteristic of a component and a self temperature rise, and it was made. We select range of humidity as use temperature already. Please avoid use by range more than this. There are the damage and fear of ignition. Please avoid use in the environment next. The environment that trash and the dust stick to a product. There is fear to cause a fire. The products listed on this specification sheet are intended for use in general electronic equipment (AV equipment, telecommunications equipment, home appliances, amusement equipment, computer equipment, personal equipment, office equipment, measurement equipment, industrial robots) under a normal operation and use condition. The products are not designed or warranted to meet the requirements of the applications listed below, whose performance and/or quality require a more stringent level of safety or reliability, or whose failure, malfunction or trouble could cause serious damage to society, person or property. If you intend to use the products in the applications listed below or if you have special requirements exceeding the range or conditions set forth in this catalog, please contact us. (1) Aerospace/Aviation equipment (2)Transportation equipment (cars, electric trains, ships, etc.) (3) Medical equipment (4) Power-generation control equipment (5) Atomic energy-related equipment (6) Seabed equipmentapplications (7) Transportation control equipment (8) Public information-processing equipment (9) Military equipment (10) Electric heating apparatus, burning equipment (11) Disaster prevention/crime prevention equipment (12) Safety equipment (13) Other applications that are not considered general-purpose applications When designing your equipment even for general-purpose applications, you are kindly requested to take into consideration securing protection circuit/device or providing backup circuits in your equipment. 001-01 / 20140425 / trans_switching-power_eco_en.fm Transformers for Switching Power Supplies ECO series Contents Page Development Concept ....................................................................................4 Overview .........................................................................................................5 Product Lineup................................................................................................7 ECO20 seriesFor multiple outputs Vertical/Horizontal types.................9 ECO22 seriesFor multiple outputs Vertical/Horizontal types...............12 ECO24 seriesFor multiple outputs Vertical/Horizontal types...............17 List of Plans for Standard Windings and Connections..................................26 Design Reference for Switching Power Transformers ...................................30 Specification Request Forms For Flyback Converter ...............................................................................33 For Home Appliances................................................................................34 * All specifications are subject to change without notice. (4/34) T R A N S F O R M E R S Transformers for Switching Power Supplies Product compatible with RoHS directive Compatible with lead-free solders Pin terminal type (For multiple outputs) Development Concept of the ECO Series The ECO series is compliant with worldwide safety standards*. It is a pin-compatible, newly developed transformer that can be downsized and thinned. * Applicable as of April 2007: UL/IEC/J 60065 Ver.7 (TV, DVD, STB), UL/IEC/60950 Ver.3 (printer), UL/IEC 60335-1 Ver.4 (home appliance) MATERIAL Optimum materials and core shape have been developed. No insulation-supporting material is used, and this secures the insulating distance. While optimizing materials, TDK has further improved its proprietary core shape to develop a new-type ECO core. TDK has downsized the product considerably in order to securing the necessary creepage distance. MANUFACTURING METHOD Since the ECO Series supports automatic winding, the product is of a high quality and can be manufactured stably. It is designed to support automatic winding, which enables a remarkable reduction in the loss generated to achieve a proficient in manual winding until stable production. OPTIMIZATION DESIGN Using design tools developed with TDK's comprehensive know-how, high-precision design has been achieved in a short period of time. 1) For optimization design and high-quality stable production, customers can use a specification request form. 2) If you provide the necessary information in the form, you will receive the optimization design in a short time. 3) We have prepared an individual specifications request document for the home appliance market. 4) TDK recommends design with a standard core gap (AL-value) for optimization and shorter trial and mass production lead time.Plans for standard winding connection (patterns of recommended pin arrangement and winding structure) are available.These help to speed up the design process, support automatic winding, and prevent deterioration in quality. ENVIRONMENT The ECO series is RoHS directive-compliant. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (5/34) T R A N S F O R M E R S Transformers for Switching Power Supplies Product compatible with RoHS directive Compatible with lead-free solders Pin terminal type (For multiple outputs) Overview of the ECO Series FEATURES Downsized yet compliant with worldwide safety standards. Supports automatic winding. Considerably reduced characteristic variations. Product compatible with RoHS directive. APPLICATION Set-top boxes, air-conditioners, DVD players/recorders Blu-ray disc players/recorders, printers, LCD monitors Multiple-output power supplies PART NUMBER CONSTRUCTION ECO Series name 2017SEO - Core shape Internal code OPERATING TEMPERATURE RANGE, PACKAGE QUANTITY, PRODUCT WEIGHT Type Temperature range Operating Storage temperature temperature C C ECO2017 -30 to +120 -40 to +80 ECO2020 -30 to +120 -40 to +80 ECO2023 -30 to +120 -40 to +80 ECO2219 -30 to +120 -40 to +80 ECO2225 -30 to +120 -40 to +80 ECO2230 -30 to +120 -40 to +80 ECO2420 -30 to +120 -40 to +80 ECO2425 -30 to +120 -40 to +80 ECO2430 -30 to +120 -40 to +80 With self-heating Maximum wet-bulb temperature 38C, without dewing Without dewing Humidity range Operating humidity Storage humidity range range %RH 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 %RH 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 10 to 95 Standard test conditions Ambient Relative humidity range temperature C 25 10 25 10 25 10 25 10 25 10 25 10 25 10 25 10 25 10 %RH 25 to 75 25 to 75 25 to 75 25 to 75 25 to 75 25 to 75 25 to 75 25 to 75 25 to 75 RoHS Directive Compliant Product: See the following for more details related to RoHS Directive compliant products. http://www.tdk.co.jp/rohs/ * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (6/34) T R A N S F O R M E R S Overview of the ECO Series GENERAL CHARACTERISTICS Item Inductance DC resistance Turn ratio and polarity Withstand voltage Insulation resistance Temperature rise Standards Individual specification (tolerance10%) Less than 0.1: : 30% 0.1: to 1.0: : 20% 1.0: or more: 15% Specified value 1 to 20%, individual specification No abnormality between the primary and secondary windings, between the primary winding and the core, and so on. 100M: min. Standard design value 45C max. (thermocouple method) 55C max. (resistance method) Test methods Use LCR meter (f=10kHz), 4263B or equivalent. Use Ohm-meter AX114N or equivalent. Use turn ratio tester TRM-201 (f=1 to 100kHz) or equivalent. Apply separately specified AC voltage (50Hz) for 1min. Measure by applying DC.500V. Use insulation resistance meter SM-5E or equivalent. Measure the core surface by thermocouple method, and the windings by resistance method or thermocouple method. RELIABILITY TESTS Item Vibration resistance Standards Heat resistance Cold resistance Humidity resistance Temperature cycle Standard of inductance, insulation resistance, withstand voltage must be satisfied. Terminal strength 9.8N min. Solderability Solder covers more than 90%. Test methods Sweep 1.5mm amplitude and 10-to-55-to-10Hz in 1min in X, Y, and Z directions for 2h respectively. Measure in normal temperature after leaving in 1002C for 96h. Measure in normal temperature after leaving in -402C for 96h. Measure in normal temperature after leaving in 602C and 90 to 95(%)RH for 96h. One cycle is -25C for 30min, normal temperature for 30min, and 85C for 30min; measure after 10 cycles of the test have been performed. Apply 9.8N load in the direction of terminal axis for 305s. Any terminal must not be pulled out or chatter. Dip in solder with the temperature of 2452C for 30.5s. The above listed items are representative examples. The details can be found by referring to the appended individual delivery specifications. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (7/34) T R A N S F O R M E R S Product Lineup We have made a new lineup of replacement parts for products with different shapes that meet our customers' needs for smaller products. We can also provide different transformer shapes not shown in the catalog, so feel free to contact us. Horizontal type D D W W H H Vertical type Product Lineup Core parameter Generalpurpose shaped cores Cross-sectional Reference center leg area output power Ae (mm2) (W) EI22 EE25/19 36.3 12 20 26 50 46.4 25 50 46.4 36 50 ECO2230 46.4 48 50 ECO2420 63.8 35 50 63.8 50 50 63.8 68 50 36.3 5 14 20 50 46.4 18 50 46.4 30 50 46.4 42 50 63.8 41 50 63.8 59 50 46.7 29 50 New shaped 1 Vertical type ECO2017 ECO2020 ECO2023 ECO2219 ECO2225 ECO2425 EED2820 EER28 EER28L ECO2430 Horizontal type ECO2017 ECO2020 ECO2023 EE25/19 ECO2219 2 Switching Frequency fsw(kHz) EER2820 ECO2225 ECO2230 EER28 ECO2425 ECO2430 EER28L Horizontal type (SLDtype) ECO2425SLD Bobbin parameter Terminal Pin pitch Bobbin Type 3 P (mm) Dimensions Lead space F (mm) Number of pins Depth Width Height D x W x H (mm)max. 12 12 14 12 12 14 12 12 12 14 12 16 12 16 19.5 19.5 19.5 23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 24.0 25.0 24.0 25.0 24.0 25.0 22.5 22.5 22.5 28.5 24.0 30.0 28.5 28.5 30.0 28.5 24.0 28.5 31.5 28.5 35.5 28.5 35.5 24.0 27.0 30.0 25.0 25.0 25.0 31.0 31.0 31.0 36.0 36.0 26.5 26.5 31.5 31.5 36.5 36.5 20.0 22.5 25.0 20.0 20.0 25.0 25.0 30.0 30.0 25.0 25.0 30.0 30.0 12 12 12 12 12 12 12 12 12 12 12 12 12 24.5 27.0 29.5 25.0 25.0 30.5 30.5 35.5 35.5 30.5 30.5 36.0 36.0 23.5 23.5 23.5 29.0 26.0 29.0 26.0 29.0 26.0 30.0 27.0 30.0 27.0 20.0 20.0 20.0 24.0 24.0 24.0 24.0 24.0 24.0 25.0 25.0 25.0 25.0 25.0 12 30.0 26.0 20.0 V V V V V V V V V V V V V V V V V 3.75 15.0 12 5.0 4.0 3.75 5.0 4.0 3.75 5.0 4.0 5.0 4.0 5.0 4.0 5.0 4.0 17.5 17.5 17.5 17.5 17.5 17.5 17.5 17.5 17.5 20.0 17.5 20.0 17.5 20.0 H H H H H H H H H H H H H 3.75 3.75 3.75 5.0 4.0 5.0 4.0 5.0 4.0 5.0 4.0 5.0 4.0 H 4.0 1 Ferrite cores are not sold separately. The reference output was obtained under conditions where the frequency was 50kHz and creepage distance was 4mm. (See the relevant page for details of each shape.) The reference output differs depending on the switching device, switching frequency, transformer temperature, conditions, etc. Use this output for reference. 3 The bobbin is made from phenol with a flame resistance grade of 94V-2 or higher. 2 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (8/34) T R A N S F O R M E R S Lineup of ECO Series 40 Height from substrate(mm) ECO 2430 ECO 2230 35 30 ECO 2023 ECO 2020 25 ECO ECO 2017 2219 20 ECO 2017 ECO 2020 ECO 2023 ECO 2425 ECO 2225 ECO 2420 ECO 2219 ECO 2225 ECO 2425 ECO 2230 ECO 2430 ECO 2425 SLD : Vertical type : Horizontal type 20 60 40 80 100 Handling power(W) * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (9/34) T R A N S F O R M E R S ECO20 seriesFor Multiple OutputsVertical/Horizontal types ELECTRICAL CHARACTERISTICS Type ECO2017 ECO2020 ECO2023 : Recommended range Transformer handling power(W) [Vertical/Horizontal type] Creepage distance 0.0mm 2.0mm 2.5mm 3.2mm 33 21/18 19/14 15/10 49 31/26 28/21 23/15 34/29 31/24 25/16 54 37 28/25 26/22 23/18 56 41/38 39/33 35/28 59 46/40 41/35 37/29 42 33/31 31/28 29/25 50/46 47/42 43/37 62 64 51/47 48/43 44/37 Frequency 50kHz 75kHz 100kHz 50kHz 75kHz 100kHz 50kHz 75kHz 100kHz 4.0mm 12/ 5 17/ 8 19/ 8 20/14 30/21 31/22 26/20 39/31 39/31 5.0mm 7/- 10/- 11/- 16/ 8 24/13 25/14 22/15 33/23 34/24 6.4mm - 1/- 1/- 10/- 15/ 1 16/ 1 17/ 8 25/13 26/13 8.0mm - - - 3/- 5/- 5/- 11/- 16/- 16/- The Vertical type places its described creepage distance and its half distance on the terminal side and guard side, respectively. The Horizontal type places its described creepage distance on both sides. Transformer-handling power may differ depending on switching devices, switching frequency, transformer temperature, conditions during usage, etc. Therefore, use the handling power for reference only. Core parameter Type Generalpurpose cores cores material Bobbin parameter center leg area Ae (mm2) Bobbin Type 36.3 V H V H V H ECO2017 ECO2020 EE25/19 (EI22) PC47 family ECO2023 Spool width (mm) min. 10.4 9.8 13.4 12.8 16.4 15.8 Dimensions Spool height (mm) min. 3.6 3.7 3.6 3.7 3.6 3.7 Applications Depth Width Height Number D x W x H Air of pins STB condi(mm)max. tioner 12 19.5 22.5 24.0 12 24.5 23.5 20.0 12 19.5 22.5 27.0 12 27.0 23.5 20.0 12 19.5 22.5 30.0 12 29.5 23.5 20.0 DVD BD Others STANDARD CORE AL-value Type AL-value: R20 series(nH/N2) 100 112 125 For multiple outputs ECO2017 ECO2020 ECO2023 140 160 180 200 224 250 280 315 400 In order to respond to our customers' requested delivery dates and costs, TDK can provide standard GAP products (indicated by " " in the below chart) for each shape. Please contact us about other GAP products separately. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (10/34) T R A N S F O R M E R S ECO20 seriesFor Multiple Outputs (Vertical type) SHAPE & DIMENSIONS Bobbin typeV 22.5max. 19.5max. H max. Type ECO2017 ECO2020 ECO2023 Bobbin type V V V 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 12-o0.8 Dimensions in mm H max. 24.0 27.0 30.0 RECOMMENDED BASE MATERIAL OPENING SIZE 3.750.1 12-o1.3 1 12 6 7 15.00.1 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection A 6 7 B 6 NP2 8 5 NP1 9 NS2 NP1 NS1b 8 5 NS1b 4 7 NP2 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (11/34) T R A N S F O R M E R S ECO20 seriesFor Multiple Outputs (Horizontal type) SHAPE & DIMENSIONS Bobbin typeH 23.5max. D max. 20.0max. Type ECO2017 ECO2020 ECO2023 Bobbin type H H H 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 D max. 24.5 27.0 29.5 12-o0.8 Dimensions in mm F 20.0 22.5 25.0 RECOMMENDED BASE MATERIAL OPENING SIZE 3.750.1 1 12 6 7 F0.1 12-o1.3 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection C 6 7 D 6 NP2 8 5 NP1 9 NS2 NP1 NS1b 8 5 NS1b 4 7 NP2 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (12/34) T R A N S F O R M E R S ECO22 seriesFor multiple OutputsVertical/Horizontal types ELECTRICAL CHARACTERISTICS : Recommended range Transformer handling power(W) [Vertical/Horizontal type] Creepage distance 0.0mm 2.0mm 2.5mm 3.2mm 4.0mm 5.0mm 6.4mm 8.0mm 50kHz 47 36/32 33/28 30/24 25/18 20/11 13/ 1 4/- ECO2219 75kHz 69 52/47 48/42 43/34 37/26 29/16 18/ 2 6/- 51/46 48/41 42/34 36/26 29/16 18/ 2 6/- 100kHz 67 50kHz 57 46/43 44/40 40/35 36/30 32/23 25/14 17/3 ECO2225 75kHz 78 64/59 61/54 56/48 50/41 43/32 34/19 23/4 100kHz 77 63/58 60/53 55/47 49/40 43/31 33/18 22/4 50kHz 67 57/54 55/51 52/47 48/42 44/36 37/27 30/18 ECO2230 75/71 72/67 68/61 63/55 57/47 49/36 39/23 75kHz 87 100kHz 86 73/70 71/65 67/60 62/54 56/46 48/35 39/23 The Vertical type places its described creepage distance and its half distance on the terminal side and guard side, respectively. The Horizontal type places its described creepage distance on both sides. Transformer-handling power may differ depending on switching devices, switching frequency, transformer temperature, conditions during usage, etc. Therefore, use the handling power for reference only. Type Frequency Core parameter Type Generalpurpose cores cores material Bobbin parameter center leg area Ae (mm2) Bobbin Type 46.4 V V V H H V V V H H V V H H ECO2219 ECO2225 EER28 PC47 EED2820 family ECO2230 Spool width (mm) min. 11.9 11.9 11.9 11.6 11.6 17.2 17.2 17.2 16.9 16.9 22.2 22.2 21.9 21.9 Dimensions Spool height (mm) min. 4.1 4.1 4.1 4.3 4.3 4.1 4.1 4.1 4.3 4.3 4.1 4.1 4.3 4.3 Applications Depth Width Height Number D x W x H Air of pins STB condi(mm)max. tioner 12 23.0 28.5 25.0 12 23.0 24.0 25.0 14 23.0 30.0 25.0 12 25.0 29.0 24.0 12 25.0 26.0 24.0 12 23.0 28.5 31.0 12 23.0 24.0 31.0 14 23.0 30.0 31.0 12 30.5 29.0 24.0 12 30.5 26.0 24.0 12 23.0 28.5 36.0 12 23.0 24.0 36.0 12 35.5 29.0 24.0 12 35.5 26.0 24.0 DVD BD Others STANDARD CORE AL-value Type AL-value: R20 series(nH/N2) 100 112 125 140 160 180 200 224 250 280 315 400 For multiple outputs ECO2219 ECO2225 ECO2230 In order to respond to our customers' requested delivery dates and costs, TDK can provide standard GAP products (indicated by "" in the below chart) for each shape. Please contact us about other GAP products separately. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (13/34) T R A N S F O R M E R S ECO22 seriesFor Multiple Outputs (Vertical type) SHAPE & DIMENSIONS Bobbin typeV V W max. 23.0max. H max. Type Bobbin type V V V V V V ECO2219 ECO2225 ECO2230 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 W max. 28.5 24.0 28.5 24.0 28.5 24.0 12-o0.8 H max. 25.0 25.0 31.0 31.0 36.0 36.0 Dimensions in mm P 5.0 4.0 5.0 4.0 5.0 4.0 RECOMMENDED BASE MATERIAL OPENING SIZE P0.1 1 12 6 12-o1.3 7 17.50.1 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection A 6 7 B 6 NP2 8 5 NP1 9 NS2 NP1 NS1b 8 5 NS1b 4 7 NP2 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (14/34) T R A N S F O R M E R S ECO22 seriesFor Multiple Outputs (Vertical type) SHAPE & DIMENSIONS Bobbin typeV 23.0max. 30.0max. 7 6 8 5 9 4 10 3 11 2 12 1 13 14 H max. Type ECO2219 ECO2225 Bobbin type V V 3.50.8 14-o0.8 Dimensions in mm H max. 25.0 31.0 RECOMMENDED BASE MATERIAL OPENING SIZE 14 3.750.1 1 6 7 14-o1.3 17.50.1 Dimensions in mm * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (15/34) T R A N S F O R M E R S ECO22 seriesFor Multiple Outputs (Vertical type) RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection E 4-connection F 7 G-1 7 7 NS4 6 8 NP2 6 8 NS1b 5 9 NS2 NP1 NS1b 5 10 4 2 NS3 NP1 NS2 9 4 10 NS1a 11 x 12 2 NB NS1 11 x 12 2 NB 1 8 NP2 5 10 NS1a x 6 9 NP1 4 NP2 13 11 12 NB 1 13 14 14 1 13 14 1st side 1-output H-1 I-1 14 13 1 14 13 NP2 12 2 NP1 NS2 NP1 NS1b 12 NS1b 11 1 NP2 3 2 11 3 NS1a x 9 NS1a 4 x 5 9 NB1 6 8 NB2 6 NB2 7 H-2 5 NB1 8 1st side 2-output 4 7 I-2 14 14 NP2 NP2 13 1 13 1 NS2 12 2 NP1 12 NS1b 11 2 NP1 3 11 3 NS1a x 9 NS1a 4 x 5 9 NB1 8 NS1b 4 5 NB1 6 8 NB2 7 6 NB2 7 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (16/34) T R A N S F O R M E R S ECO22 seriesFor Multiple Outputs (Horizontal type) SHAPE & DIMENSIONS Bobbin typeH H W max. D max. 24.0max. Type Bobbin type H H H H H H ECO2219 ECO2225 ECO2230 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 D max. 25.0 25.0 30.5 30.5 35.5 35.5 12-o0.8 W max. 29.0 26.0 29.0 26.0 29.0 26.0 P 5.0 4.0 5.0 4.0 5.0 4.0 Dimensions in mm F 20.0 20.0 25.0 25.0 30.0 30.0 RECOMMENDED BASE MATERIAL OPENING SIZE P0.1 1 12 6 12-o1.3 7 F0.1 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection C 6 7 D 6 NP2 5 8 NP1 9 NS2 NP1 NS1b 5 NS1b 4 7 NP2 8 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (17/34) T R A N S F O R M E R S ECO24 seriesFor multiple outputsVertical/Horizontal types ELECTRICAL CHARACTERISTICS Type ECO2420 ECO2425 ECO2430 ECO2425SLD : Recommended range Transformer handling power(W) [Vertical/Horizontal type] Creepage distance 0.0mm 2.0mm 2.5mm 3.2mm 66 50/- 46/- 41/- 85 65/- 60/- 53/- 83 63/- 59/- 52/- 79 64/59 61/54 56/48 78/72 74/66 68/59 96 94 77/71 73/65 67/57 95 81/76 78/72 73/66 92/87 88/82 83/75 107 105 90/85 86/80 81/73 57 -/44 -/40 -/35 80 -/60 -/55 -/48 78 -/59 -/54 -/47 Frequency 50kHz 75kHz 100kHz 50kHz 75kHz 100kHz 50kHz 75kHz 100kHz 50kHz 75kHz 100kHz 4.0mm 35/- 46/- 45/- 50/41 61/50 60/49 68/59 77/67 76/66 -/29 -/40 -/39 5.0mm 28/- 36/- 35/- 43/32 53/39 52/38 62/51 70/58 69/56 -/22 -/31 -/30 6.4mm 18/- 23/- 22/- 34/19 41/23 40/22 53/39 60/44 59/43 -/12 -/17 -/16 8.0mm 6/- 8/- 7/- 23/4 28/5 27/5 43/25 48/29 47/28 -- -- -- The Vertical type places its described creepage distance and its half distance on the terminal side and guard side, respectively. The Horizontal type places its described creepage distance on both sides. Transformer-handling power may differ depending on switching devices, switching frequency, transformer temperature, conditions during usage, etc. Therefore, use the handling power for reference only. Core parameter Type Generalpurpose cores cores material Bobbin parameter ECO2425 EER28 EER28L PC47 family PC47 family Spool height (mm) min. 4.6 4.6 4.6 4.6 4.8 4.8 4.6 4.6 4.8 4.8 Applications Depth Width Height Number D x W x H Air of pins STB condi(mm)max. tioner 12 24.0 28.5 26.5 14 25.0 31.5 26.5 12 24.0 28.5 31.5 16 25.0 35.5 31.5 12 30.5 30.0 25.0 12 30.5 27.0 25.0 12 24.0 28.5 36.5 16 25.0 35.5 36.5 12 36.0 30.0 25.0 12 36.0 27.0 25.0 H 16.3 4.2 12 Bobbin Type 63.8 ECO2430 ECO2425SLD V V V V H H V V H H Spool width (mm) min. 12.1 12.1 17.1 17.1 16.8 16.8 22.1 22.1 21.8 21.8 center leg area Ae (mm2) ECO2420 46.7 Dimensions 30.0 26.0 20.0 DVD BD Others STANDARD CORE AL-value Type AL-value: R20 series(nH/N2) 100 112 125 140 160 180 200 224 250 280 315 400 For multiple outputs ECO2420 ECO2425 ECO2430 ECO2425SLD In order to respond to our customers' requested delivery dates and costs, TDK can provide standard GAP products (indicated by " " in the below chart) for each shape. Please contact us about other GAP products separately. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (18/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Vertical type) SHAPE & DIMENSIONS Bobbin typeV 28.5max. 24.0max. H max. Type ECO2420 ECO2425 ECO2430 Bobbin type V V V 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 12-o0.8 Dimensions in mm H max. 26.5 31.5 36.5 RECOMMENDED BASE MATERIAL OPENING SIZE 5.00.1 12-o1.3 1 12 6 7 17.50.1 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection A 6 7 B 6 NP2 5 8 NP1 9 NS2 NP1 NS1b 5 NS1b 4 7 NP2 8 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (19/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Vertical type) SHAPE & DIMENSIONS Bobbin typeV 25.0max. 31.5 max. 7 6 8 5 9 4 10 3 11 2 12 1 13 14 H max. Type ECO2420 Bobbin type V 3.50.8 14-o0.8 Dimensions in mm H max. 26.5 RECOMMENDED BASE MATERIAL OPENING SIZE 14 4.00.1 1 6 7 14-o1.3 20.00.1 Dimensions in mm * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (20/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Vertical type) RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection E 4-connection F 7 G-1 7 7 NS4 6 8 NP2 6 8 NS1b 5 9 NS2 NP1 NS1b 5 10 4 2 NS3 NP1 NS2 9 4 10 NS1a 11 x 12 2 NB NS1 11 x 12 2 NB 1 8 NP2 5 10 NS1a x 6 9 NP1 4 NP2 13 11 12 NB 1 13 14 1 13 14 1st side 1-output 14 G-2 7 NS4 6 8 NP2 5 9 NP1 NS2 4 10 NS1 x 11 2 12 NB 1 13 NS3 14 H-1 I-1 14 13 1 14 13 NP2 12 2 NP1 NS2 NP1 NS1b 12 NS1b 11 1 NP2 3 2 11 3 NS1a x 9 NS1a 4 x 5 9 NB1 6 8 NB2 6 NB2 7 H-2 5 NB1 8 1st side 2-output 4 7 I-2 14 14 NP2 NP2 13 1 13 1 NS2 12 2 NP1 12 NS1b 11 2 NP1 3 11 3 NS1a x 9 NS1a 4 x 5 9 NB1 8 NS1b 4 5 NB1 6 8 NB2 7 6 NB2 7 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (21/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Vertical type) SHAPE & DIMENSIONS Bobbin typeV 25.0max. 35.5 max. 8 H max. Type ECO2425 ECO2430 Bobbin type V V 7 9 6 10 5 11 4 12 3 13 2 14 1 15 3.50.8 16 16-o0.8 Dimensions in mm H max. 31.5 36.5 RECOMMENDED BASE MATERIAL OPENING SIZE 4.00.1 16 1 7 8 16-o1.3 20.00.1 Dimensions in mm * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (22/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Vertical type) RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection J-1 3-connection 8 4-connection K-1 8 L-1 8 NS4 7 9 7 6 10 6 NP2 5 11 NP1 7 9 NS3 6 10 NP2 NS1b NP1 NS1a 5 NS1a 12 4 12 4 x 13 x 13 x 14 2 14 2 NB NB 1 15 10 NP2 NS2 NP1 NS1 5 11 4 2 9 NS2 NS1b 11 12 13 14 NB 1 1 15 15 16 16 16 L-2 8 NS4 7 9 6 10 NP2 NS2 NP1 NS1 5 11 4 12 x 13 2 14 NB NS3 1 1st side 1-output 15 16 J-3 8 K-3 8 L-3 8 NS4 7 9 NP2 7 6 10 7 9 NP2 NS1b 6 9 NP2 NS2 6 10 10 NS2 NS1b 5 11 NP1 5 5 11 NP1 NS1a NS1a 12 4 12 4 x 13 x 13 x 14 2 14 2 NB NB 1 15 1 16 11 NP1 4 2 NS3 NS1 12 13 14 NB 1 15 15 16 16 L-4 8 NS3 7 9 NP2 6 10 NS2 5 11 NP1 NS1 4 12 x 13 2 14 NB 1 NS3 15 16 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (23/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Vertical type) RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection M-1 3-connection N-1 16 1 15 16 2 NP1 NP2 NS3 NP1 NS2 2 14 NS2 13 1 15 NP2 14 4-connection 3 13 4 x 3 NS1a x 4 NS1b NS1 5 11 ND 6 10 6 10 NB2 NV 7 9 7 9 8 M-2 5 11 NB1 8 N-2 16 1 15 16 2 14 NP1 NP2 NS3 NP1 NS2 2 14 NS2 13 1 15 NP2 3 13 4 x 3 NS1a x 4 NS1b NS1 5 11 ND 10 9 6 10 7 9 NB2 M-3 6 7 NV 8 1st side 2-output 5 11 NB1 8 N-3 16 16 NP2 NP2 1 15 1 15 NS3 2 14 NP1 13 2 14 NS2 NP1 3 13 4 x NS2 3 NS1a x 4 NS1b NS1 5 11 ND 6 10 6 10 NB2 NV 7 9 7 9 8 M-4 5 11 NB1 8 N-4 16 16 NP2 NP2 1 15 1 15 NS3 2 14 NP1 13 2 14 NS2 NP1 3 13 4 x NS2 3 NS1a x 4 NS1b NS1 5 11 10 9 5 11 NB1 ND 6 10 7 9 NB2 8 6 7 NV 8 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (24/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Horizontal type) SHAPE & DIMENSIONS Bobbin typeH H W max. D max. 25.0max. Type Bobbin type H H H H ECO2425 ECO2430 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 D max. 30.5 30.5 36.0 36.0 12-o0.8 W max. 30.0 27.0 30.0 27.0 P 5.0 4.0 5.0 4.0 Dimensions in mm F 25.0 25.0 30.0 30.0 RECOMMENDED BASE MATERIAL OPENING SIZE P0.1 1 12 6 12-o1.3 7 F0.1 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection C 6 7 D 6 NP2 8 5 NP1 9 NS2 NP1 NS1b 8 5 NS1b 4 7 NP2 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (25/34) T R A N S F O R M E R S ECO24 seriesFor Multiple Outputs (Horizontal type) SLD Type SHAPE & DIMENSIONS Bobbin typeH W max. D max. 20.0max. Type ECO2425SLD Bobbin type H 6 7 5 8 4 9 3 10 2 11 1 12 3.50.8 D max. 30.0 12-o0.8 W max. 26.0 Dimensions in mm P 4.0 F 25.0 RECOMMENDED BASE MATERIAL OPENING SIZE P0.1 1 12 6 12-o1.3 7 F0.1 Dimensions in mm RECOMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits 2-connection 3-connection C 6 7 D 6 NP2 8 5 NP1 9 NS2 NP1 NS1b 8 5 NS1b 4 7 NP2 4 9 NS1a x 1st side 1-output 2 NS1a 10 x 11 2 NB 1 10 11 NB 12 1 12 Please refer to P.26 for more details about the list of plans for standard windings and connections. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (26/34) T R A N S F O R M E R S ECO seriesList of Plans for Standard Windings and Connections Item Number of secondary circuits 2-connection 3-connection A 6 7 NP2 5 8 NP1 7 NS2 NP1 NS1b 9 8 9 4 NS1a x G-1 6 x 10 8 NP2 NS3 NP1 NS2 5 NS1a 10 7 NS4 NP2 5 NS1b 4 4-connection B 6 9 10 4 NS1 2 11 2 NB 11 x 12 2 11 NB 1 12 1 12 NB 1 13 14 C 6 7 D 6 NP2 5 8 NP1 NS2 NP1 NS1b 9 8 4 6 9 NP1 10 x 8 5 NS1a 10 x 1st side 1-output 7 NP2 9 NS1a G-2 NS4 5 NS1b 4 7 NP2 NS2 4 10 NS1 2 11 2 NB 11 x 12 2 11 NB 1 12 1 12 NB 13 1 NS3 14 E 7 6 8 NP2 F 7 6 NS1b 9 5 10 NS2 NP1 NS1b 9 5 NP1 4 8 NP2 4 10 NS1a x 2 NS1a 11 x 12 2 NB 1 11 12 NB 13 14 1 13 14 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (27/34) T R A N S F O R M E R S Item Number of secondary circuits 2-connection 3-connection J-1 8 4-connection K-1 8 L-1 8 NS4 9 7 9 7 10 6 11 NP1 NS3 6 NP2 5 10 NP2 NS1b NP1 NS1a 6 11 5 NS1a 12 4 12 4 x 13 x 13 x 14 2 14 2 NB NB 1 15 10 NP2 NS2 NP1 NS1 11 5 4 2 9 7 NS2 NS1b 12 13 14 NB 15 1 15 1 16 16 16 L-2 8 NS4 7 9 10 6 NP2 NS2 NP1 NS1 5 11 4 12 x 13 14 2 NB NS3 1 1st side 1-output 15 16 J-3 8 K-3 8 L-3 8 NS4 9 7 NP2 NP2 10 6 9 7 NS1b 9 7 NP2 NS2 10 6 10 6 NS2 NS1b 11 5 NP1 11 5 NP1 NS1a NP1 12 4 12 4 x 13 x 13 x 14 2 14 2 NB NB 1 15 16 1 11 5 NS1a 4 2 NS3 NS1 12 13 14 NB 15 15 1 16 16 L-4 8 NS3 9 7 NP2 6 10 NS2 11 5 NP1 NS1 4 12 x 13 2 14 NB 1 NS3 15 16 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (28/34) T R A N S F O R M E R S Item Number of secondary circuits 2-connection 3-connection H-1 I-1 14 13 1 14 13 NP2 12 2 NP1 1 NP2 NS2 NP1 NS1b 12 NS1b 11 3 2 11 3 NS1a x 9 NS1a 4 x 5 9 NB1 4 5 NB1 6 8 6 8 NB2 NB2 7 H-2 4-connection 7 I-2 14 14 NP2 NP2 13 1 13 1 NS2 2 12 NP1 NP1 3 11 2 12 NS1b 3 11 NS1a x 9 NS1a 4 x 5 9 NB1 6 5 6 8 NB2 NB2 7 M-1 4 NB1 8 1st side 2-output NS1b 7 N-1 16 15 16 15 1 NP2 14 NS2 13 NS3 NP1 NS2 14 2 NP1 1 NP2 3 13 4 x 2 3 NS1a x 4 NS1b 11 NS1 11 5 NB1 10 10 6 NB2 6 NV 9 9 7 8 M-2 5 ND 7 8 N-2 16 15 1 16 15 NP2 14 2 NP1 NS3 NP1 NS2 14 NS2 13 1 NP2 3 13 4 x 2 3 NS1a x 4 NS1b 11 NS1 5 11 NB1 10 9 6 10 7 9 NB2 8 5 ND 6 7 NV 8 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (29/34) T R A N S F O R M E R S Item Number of secondary circuits 2-connection M-3 3-connection N-3 16 4-connection 16 NP2 NP2 15 15 1 1 NS3 14 14 2 NP1 NS2 13 2 NP1 3 13 4 x NS2 3 NS1a x 4 NS1b 11 NS1 5 11 NB1 10 10 6 NB2 7 9 8 M-4 6 NV 9 1st side 2-output 5 ND 7 8 N-4 16 16 NP2 NP2 15 1 15 1 NS3 14 2 NP1 14 NS2 13 2 NP1 3 13 4 x NS2 3 NS1a x 4 NS1b 11 NS1 5 11 NB1 10 9 6 10 7 9 NB2 8 5 ND 6 7 NV 8 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (30/34) T R A N S F O R M E R S Design Reference for Switching Power Transformers * Maximum allowable temperature The maximum ambient temperature of the transformer is E Class (120C). However, there is no E Class for transformers shipped for North America; therefore, the maximum ambient temperature is Class 105 (105C). [Class 130 (130C) is possible when UL1446 insulating system is applied.] * Temperature rise in Transformers In normal design condition, 55C or less (using the resistance method) is the target of temperature rise of windings. Therefore, the maximum ambient temperature at this time is 65C (50C max. for North America). In case of measuring the temperature of the windings by thermocouple, 10 to 15C more would be allowable. (2)To check on the saturation of the core it is possible to judge from current waveforms of primary winding. Current flowing in the inductor changes in a straight line in relation to time as in the figure a) in accordance with l= E uT. L However, in the event that a saturation phenomena has occurred in the core, inductance is reduced causing a rapid and drastic increase of current as shown figure b). +E Ip Lp <In the case of flyback> * Dealing with safety regulations Designs are made in consideration of materials, structures an so on that the designed transformers are comply with designated safety regulations. (1)Regarding the core To be handled in the same manner as Basic Insulation. (2)Distance between transformer and other parts Please keep the distance between the transformer and other parts in according with applicable safety standards. * Concerning of the influence of leakage flux Due to the fact that there is always some degree of leakage flux from transformer, designs should be made to keep them apart as much as possible from parts that are easily affected by this. * Magnetic saturation of the core (1)Magnetic operating condition of the core in the transformer are determined by maximum operation temperature (including temperature rise) and driving condition in circuits. If product is used in condition that exceed these conditions, there is a possibility of occurring magnetic saturation of the core. The following items could be possible cause of core saturation. * The product is used in conditions that exceed the maximum operating temperature. * Operating frequencies are lower than the ones initially designed. (longer ON time) * The input voltage is abnormally higher than the specified values. a)- Normal b)- Saturation phenomena (3)In this case, there is possibility that a breakdown may occur due to surpassing the rated current of the switch it is necessary to have over current protection circuit or modify transformer design. * Circuit topologies of switching power supply The term "topology" refers to the arrangement of the power components within the switching power supply design. There are several different kind of circuit topologies as following; Forward converter Push-Pull converter ON/ON mode Half and Full-Bridge converter Self-excited flyback system (RCC system, pseudo resonance system) Separately-excited flyback system (PWM system, PFM system) ON/OFF mode Chopper type (step-down type, step-up type, step-up/ step-down type) Resonance mode Voltage resonance type, current resonance type * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (31/34) T R A N S F O R M E R S * Which topology of switching power supply to use? Each topology has its relative merit in terms of cost and performance. One topology may have a low parts cost but only be able to provide a limited amount of power; another may have ample power capability but cost more, and so on. The following relationship between output voltage and power give us one suggestion when we need to chose topology in given conditions; * How to decide primary inductance (Lp)? (1) When the self-excited flyback system is selected: Using the formula P= it is possible to calculate the inductance value needed for the desired output P under the fixed Ip value. By deriving E u Ton = LP u i from the formula E= LP u Output voltage(V) 1000 the current which flows through the inductor becomes i= ON-ON type (Multi-transistor type) P= 100 0 0 10 di , dt ON-OFF type and ON-ON type (1-transistor type forward) ON-OFF type 10 1 uLP u IP2 u f[W], 2 100 1000 Output power(W) ON-OFF type: For high voltage/small current ON-ON type: For low voltage/large current * The deference of power conversion between Forward and Flyback modes. Since the forward mode converter is a system that performs power transmission to the output side during ON period of switching transistor, it is possible to work with the large output current. Consequently, forward converter method is suitable to large current output with relatively lower output voltage. To the contrary, Flyback mode converter is a system that input power is stored within the Inductor or primary coil in the transformer as a magnetic energy during ON period of switching transistor and the stored energy transmit to output side during OFF period of switching transistor. Accordingly, Flyback mode converter is suitable to high voltage and low current output, and does not suite to large current output. * The stored energy within the inductor. EuTon . LP By substituting this with P= ...., the formula of ( 1 EuTon u LPu 2 LP ) u f= 12 u E uTL 2 From this, the formula LP = 2 on2 P u f results. E2uTon2 u f results. 2uP Where, E: Input voltage Ton: On time F: Switching frequency In actual designs this value is to be slightly lowered in consideration of the transformer's efficiency. (2) When the separately-excited flyback system is selected: The coefficient k is added because a direct current is superimposed on the primary current waveform. LP = E2uTon2 (1+k) u fu 2uP (1-k) The primary current waveforms The self-excited flyback system(RCC) I Ip E +V 0 Ip Ton Lp T The separately-excited flyback system I Ip Energy stored in the inductor Lp is W = 1 u LP u IP2 u[J] 2 kIp Ton T when Ip is a triangular wave, and electric power (energy per unit time) is P= [J] 1 = u LP uIP2 u f[W] [S] 2 Where, Lp: Inductance of primary winding Ip: Peak value of primary current f: Switching frequency * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (32/34) T R A N S F O R M E R S * How to decide number of turns of primary winding? n1 : n2 E min.u Ton max. 'Bu Au (1-k) D R NP = (2) When the separately-excited flyback system is selected Where, E min.: Lower limit value of input voltage (Vdc) A: Core cross section area (m2) D: Duty ratio Ton max.: The maximum ON time for switching transistor (sec.) ': Operating flux density (T) Vi Q PWM iQ VQ (1) When the self-excited flyback system is selected: NP = E min.u Ton max. D ) (Ton max.= 'Bu A f t iC t (2) When the separately-excited flyback system is selected: NP = E min.u Ton max. 'Bu Au (1-k) Precautions must be taken as the upper limit value of 'B changes according to core materials, operating temperatures, frequencies, etc. * Determining of secondary winding ON-OFF mode As it is necessary to consider the voltage drop of the rectifier diode on the secondary side, Vo+VF 1-D u E min. D N S = NP u Where, Vf: Voltage drop of the rectifier diode Vo : Output voltage Ton max. = D : Duty ratio 1/f * Example of drive waveforms (1) When the self-excited flyback system is selected (RCC) n1 n2 R RS D iC Vi RB Tr nB VCE t iC t ton toff ton toff * In order for designing the transformer, the following conditions are necessary. It is greatly appreciated customer give us those conditions by filling out required information with the appended "Transformer specifications / inquiry form". (1)Circuit topology Flyback system, forward system, etc. (2) Used IC Design with a high degree of perfection is possible when IC manufacturer and model number information are provided. (3)Input voltage range The lower limit of rectified voltage is important, in particular. (4) Operating frequency (fixed/variable) It is especially necessary to determine the lower limit frequency for the maximum load condition in Flyback converter. (5) Maximum duty ratio It is necessary to specify maximum ON time when input voltage is lower limit, approximately 45% should be the maximum for external excitation system. (6)Operating temperature range,maximum temperature rise This is the allowable temperature rise in the transformer, should be equal to the value that ambient temperature has been taken from the temperature index of the materials which is 120C(105C in UL system). (7)Required safety regulations Structures and materials are chosen to comply with required safety regulations. (8)Output voltage/current Required for determination of the winding ratios and wire gage. (9) Transformer outside dimension It is necessary for determining the shape. (10)Instructions concerning circuit designs and pin configuration of transformer Type of the secondary rectifier diode is important in particular because of voltage drop between First recovery and Schottky barrier type is different, it will affect to design of number of turns of transformer. * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (33/34) T R A N S F O R M E R S Transformer for Switching Regulator Specification Request Form(For Flyback Converter) 1. Company name 2. Department, applicant's name(Including the sample-sending destination) Issued on / / Address Name: Person in Charge from Sales Promotion Dep.: Recorded Date / / Person in Charge from Sales Dep.: Recorded Date / / Prototype No: Recorded Date / / TEL/FAX: E-mail: 3. Circuit system 4. Input specifications (V) to (V) Operating range: (V) to (V) DC input voltage: Rated (V) to (V) Operating range: (V) to (V) Output voltage/Current/Diode used (diode voltage drop) Output Current(A) 5. AC input voltage: Rated Output specifications Example Power application Motor Output voltage(V) (Accuracy) 50V (5V) Output1 Minimum 0 Typical T measuring condition 0.8 Maximum time 1A,10sec. Output2 Output3 Output4 Output5 VCC Secondary Primary/Secondary Feedback No Rectifier diode FRD VF(V) 0.1 (Rectifier diode F.R.D: First Recovery Diode, S.B.D: Schottky Barrier Diode) Yes No (When checking "Yes", please attach a drawing separately.) Request for connection method Fixed) fsw Clock frequency ( 7. Max. duty or max. ON time D max. (%), 8. Input capacitor capacitance CIN (F) (If not specified, design will be performed using a value of ( Pin assignments changes Possible Impossible (kHz) 6. 9. Output7 2A, 3sec. Peak time Flexible / Output6 to (s) T max. )Fx4, which is times greater than the output power for 100V and worldwide transformers, and an output power of ( Operating temperature range, max. temperature rise, and ambient temperature to (C) T (C Typ. Max.) )F for 200V transformers.) Ambient temperature C 10. Desired core size and outer dimensions of transformer Core size Outer dimensions of the transformer L xW xH mm max. 11. Safety standard compliance Electrical Appliance and Material Safety Law Standard Application for a single item purchase Yes Insulation type Basic insulation Pollution degree 1 2 Set purchase UL Reinforced insulation 3 IEC CSA Others No (Please bear in mind that the application fee may be borne by the customer.) Double insulation Other ( ) (If not specified, design will be performed with a pollution degree of 2.) 12. Safety distance (Please enter the distance prescribed by the company.) Primary - secondary: mm or greater Primary - primary: mm or greater Secondary - secondary: mm or greater Secondary - core: mm or greater Primary - core: mm or greater 13. Withstand voltage (Please enter the voltage prescribed by the company.) Primary - secondary: AC (V) (min) (mA) Primary - core: AC (V) (min) (mA) Primary - primary: AC (V) (min) (mA) Secondary - core: AC (V) (min) (mA) Secondary - secondary: AC (V) (min) (mA) 14. Please Enter the Power Devices to be Used. In addition, if there are recommended transformer specifications, etc., presented by the device manufacturer, please attach these separately. Manufacturer name: Product No.: 15. Mass production and prototyping information Final set name: Mass production requested price/currency: Necessity for local contents Necessary (manufactured by ) Not necessary Acceptance conditions of the above price, delivery location (FOB CHN, CIF LA. , DDP Paris, etc.) Mass production: Mass production quantity Prototyping time: Test production1 16. Required sample quantity pcs. /M Test production2 pcs. Mass production location Mass production start time Test production for Mass production Approval location Requested delivery time: 17. If there are any other requests (priorities in the company, size or price, etc.) or alterable items, please provide a description. TDK-EPC Corporation Magnetics Business Group, Business Promotions Dept. 3-9-1, Shibaura, Minato-ku Tokyo 108-0023, Japan TEL: 81-3-6852-7229, FAX: 81-3-6852-7159 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm (34/34) T R A N S F O R M E R S Transformer for Switching Regulator Specification Request Form(For Home Appliances) 1. Issued on / / Company name Address 2. Department, applicant's name(Including the sample-sending destination) Name: Person in Charge from Sales Promotion Dep.: Recorded Date / / Person in Charge from Sales Dep.: Recorded Date / / Prototype No: Recorded Date / / TEL/FAX: E-mail: 3. Circuit system Flyback method Forward method Others 4. IC used IC maker IC model No. IC drive method Fixed frequency method (PWM) Variable frequency method(RCC) Max. duty % Other input capacitor F kHz to Drive frequency kHz S Or Max. on-time (If not specified, design will be performed using a value of ( )Fx4, which is times greater than the output power for 100V and worldwide transformers, and an output power of ( )F for 200V transformers.) 5. Input/output condition Input min. Vac max. Vac or min. Vdc max. Vdc Hz Frequency Current(A)max. Diode forward voltage VF(V) 0.8A 1.0A(10sec.) 0.7V(SBD) 0.05A 0.05A 1.0V(FRD) Current(A)typ. Voltage(V) T measuring condition Specifications Primary/Secondary output Feedback Example1 Motor Secondary Yes 50V(5V) Example2 IC Vcc Primary No 15V(2V) Output1 Output2 Output3 Output4 Output5 Output6 (Rectifier diode F.R.D: First Recovery Diode, S.B.D: Schottky Barrier Diode) Yes Request for connection method 6. Max. height 7. xL (When checking "Yes", please attach a drawing separately.) xW Environment Operating temperature range mm max. C to Ambient temperature 8. No Possible Pin assignments changes Impossible Outer dimensions of the transformer C (If not specified, design will be made according to the optimal size determined by our company.) Max. temperature rise C C (Please enter the ambient temperature. If not entered, design will be made using the thermocouple method (C.C.)) Safety standard compliance Standard Electrical Appliances and Material Safety Act, Appendix 8 UL60335-1 IEC 60335-1 Ed4 Insulation type Basic insulation Pollution degree 1 Safety distance Primary - secondary : mm Primary - primary : mm Secondary - secondary : Primary - core : mm Secondary - core : mm (Please enter the distance prescribed by the company.) 2 3 Reinforced insulation (If not specified, design will be performed with a pollution degree of 2.) mm Reference: creeping distance standard IEC60335-1 Electrical appliances and material safety act Applicable safety standards Appendix 8 Insulation class Ground voltage or line voltage (V) Operating voltage (V) 9. Ed.4 Base Enhancement Base Enhancement 50 < x 150 2.0 4.0 Pollution level2 CTI Pollution level2 CTI 150 < x 300 2.5 5.0 a/b a/b 125 < x 250 - - 2.5 - - 5.0 250 < x 400 2.0 - 4.0 4.0 - 8.0 Withstand voltage Primary - secondary : Vac min Primary - primary : Vac min Primary - core : Vac min Secondary - core : Vac min Secondary - secondary : Vac min (Please enter the distance prescribed by the company.) 10. Mass production and prototyping information Final set name: Asking price Approval location Delivery location Plan Test production1 Necessary samples Test production2 Amount Planned amount Business terms Test production for Mass production CIFMass production Requested delivery time: 11. Request Items (Enter any items that you would like to request such as priority conditions, size, price, or adjustable items.) TDK-EPC Corporation Magnetics Business Group, Business Promotions Dept. 3-9-1, Shibaura, Minato-ku Tokyo 108-0023, Japan TEL: 81-3-6852-7229, FAX: 81-3-6852-7159 * All specifications are subject to change without notice. 001-01 / 20140425 / trans_switching-power_eco_en.fm Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: TDK: ECO2020SEO-D06H015 ECO2420SEO-D01V019 ECO2425SLD-D02H0111 ECO2425SEO-D02V016 ECO2219SEO-D02V016 ECO2017SEO-D03V014 ECO2225SEO-D02V0112 ECO2017SEO-D05V016 ECO2017SEO-D01V017 ECO2020SEO-D04H015 ECO2020SEO-D08H016 ECO2430SEO-D03H016 ECO2219SEOD03V017 ECO2020SEO-D09V015 ECO2219SEO-D01V018 ECO2420SEO-D03V018 ECO2425SEO-D03V014 ECO2430SEO-D01H0110 ECO2020SEO-D07H016 ECO2017SEO-D04V015 ECO2023SEO-D01H016 ECO2425SEO-D04V017 ECO2017SEO-D02V016 ECO2225SEO-D01H016 ECO2420SEO-D02V019 ECO2020SEOD02H015 ECO2020SEO-D10V017 ECO2020SEO-D01V016 ECO2425SEO-D01V019 ECO2020SEO-D03V016 ECO2420SEO-D04V0110 ECO2425SLD-D01H017