PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Input voltage up to 144 V DC Single output of 5.1 to 48 V DC No input to output isolation * High efficiency up to 96% * Extremely wide input voltage range * Very good dynamic properties * Input undervoltage lock-out * External output voltage adjustment and inhibit * 2 temperature ranges 32 1.3" 69 2.7" * Continuous no-load and short-circuit proof 106 4.2" * No derating Safety according to IEC/EN 60950 Summary The PSB series of positive switching regulators is designed as power supply modules for electronic systems. Their major advantages include a high level of efficiency that remains virtually constant over the entire input range, high reliability, low ripple and excellent dynamic response. Modules with input voltages up to 144 V are specially designed for battery driven mobile applications. The case design allows operation at nominal load up to 71C without additional cooling. Model Selection and Key Data Table 1: Type survey Output voltage Vo nom [V] 1 2 3 Output Input current voltage range Io nom [A] Io max [A] 1 Vi [V] 2 Efficiency 3 Input voltage Vi nom [V] h min [%] h typ [%] Type designation Options -9, L, P, C 5.1 4 5 15 - 144 60 76 80 PSB 5A4-7iR 12 3 4 18 - 144 60 87 89 PSB 123-7iR 15 3 4 22 - 144 60 89 90 PSB 153-7iR 24 3 4 31 - 144 60 92 94 PSB 243-7iR 36 3 4 44 - 144 80 94 95 PSB 363-7iR 48 3 4 58 - 144 80 95 96 PSB 483-7iR Io max for Vi -80 V or reduced temperature. See: Thermal Considerations. Surges up to 156 V for 2 s. See also: Electrical Input Data: DVio min. Efficiency at Vi nom and Io nom. Non standard input/output configurations or special custom adaptions are available on request. See also: Commercial Information: Inquiry Form for Customized Power Supply. Table of Contents Page Page Summary ......................................................................... 1 Model Selection and Key Data ....................................... 1 Part Number Description ................................................ 2 Functional Description .................................................... 2 Electrical Input Data ........................................................ 3 Electrical Output Data ..................................................... 4 Auxiliary Functions .......................................................... 6 Electromagnetic Compatibility (EMC) ............................ 8 Immunity to Environmental Conditions .......................... 9 Mechanical Data ........................................................... 10 Safety and Installation Instructions ............................... 10 Description of Options .................................................. 12 Accessories ................................................................... 12 EC Declaration of Conformity ....................................... 13 REV. OCT 17, 2003 Page 1 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Part Number Descriptions PSB 12 3 -7 L i R P C Positive switching regulator in case B02 ................... PSB Nominal output voltage in volt (5A for 5.1 V) ....... 5A, ... 48 Nominal output current in ampere ............................. 4, 5 Operational ambient temperature range TA -25 to 71C ......................................................... -7 -40 to 71C (option) ........................................... -9 Input filter (option) ............................................................ L Inhibit input ....................................................................... i Control input for output voltage adjustment 1 ................. R Potentiometer 1 (option) ................................................... P Thyristor crowbar (option) .............................................. C 1 Feature R excludes option P and vice versa. Example: PSB 123-7LiPC = A positive switching regulator with a 12 V, 3 (4) A output, ambient temperature range of -25 to 71C, input filter, inhibit input, potentiometer and thyristor crowbar. Functional Description The switching regulators are designed using the buck converter topology. See also: Technical Information: Topologies. The input is not electrically isolated from the output. During the on period of the switching transistor, current is transferred to the output and energy is stored in the output choke. During the off period, this energy forces the current to continue flowing through the output choke to the load and back through the freewheeling diode. Regulation is accomplished by varying the on/off duty ratio of the power switch. These regulators are ideal for a wide range of applications, where input to output isolation is not necessary, or where already provided by an external front end (e.g. a transformer with rectifier). To optimise customer's needs, additional options and accessories are available. 03011 Io Ii Option C Vo+ Input Filter Option L Vi+ i Control circuit Vi Vo Option C R G Go- Gi- Option P Fig. 1 Block diagram REV. OCT 17, 2003 Page 2 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Electrical Input Data General Conditions: TA = 25C, unless TC is specified Table 2a: Input data Input PSB 5A4 Characteristics Vi Operating input voltage Conditions 1 DVio min Min. diff. voltage (Vi - Vo) Io = 0 - Io max TC min - TC max min typ 15 PSB 123 max min 144 18 typ 9.9 PSB 153 max min 144 22 typ max Unit 144 V DC 6 7 VU VL Undervoltage lock-out Ii NL No load input current I inr p 150 tinr r Peak value of inrush current Vi nom without option L Rise time 5 t inr h Time to half-value 40 I inr p Peak value of inrush current Vi nom with option L Rise time 180 180 180 A tinr r 15 15 15 s t inr h Time to half-value 100 100 100 ui RFI Input RFI level, EN 55011/22 Vi nom, Io nom 0.15 - 30 MHz with option L 10 12 Io = 0, Vi min - Vi max 40 15 35 35 150 mA 150 A 5 5 s 40 40 A B2 A B2 A B2 dB (V) Table 2b: Input data Input PSB 243 Characteristics Vi Operating input voltage 1 Vio min Min. diff. voltage (Vi - Vo) 1 2 Conditions Io = 0 - Io max TC min - TC max min typ 31 PSB 363 max min 144 44 typ 7 PSB 483 max min 144 58 typ 8 max Unit 144 V DC 10 VUVL Undervoltage lock-out Ii NL No load input current I inr p tinr r Peak value of inrush current Vi nom without option L Rise time t inr h Time to half-value 40 40 40 I inr p 180 180 180 A tinr r Peak value of inrush current Vi nom with option L Rise time 15 15 15 s t inr h Time to half-value 100 100 100 ui RFI Input RFI level, EN 55011/22 Vi nom, Io nom 0.15 - 30 MHz with option L 19 29 Io = 0, Vi min - Vi max 35 40 40 45 150 150 150 A 5 5 5 s A B2 A B2 A B2 Surges up to 156 V for 2 s (complying to LES-DB standard for VN = 110 V). With external input capacitor Ce = 470 F/200 V and option L. External Input Circuitry 04016 The sum of the lengths of the supply lines to the source or to the nearest capacitor *100 F (a + b) should not exceed 5 m unless option L is fitted. This option is recommended in order to prevent power line oscillations and reduce superimposed interference voltages. See also: Technical Information: Application Notes. REV. OCT 17, 2003 mA + Vi+ Vo+ Gi- Go- a b Fig. 2 Switching regulator with long supply lines. Page 3 of 13 dB (V) PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Electrical Output Data General Conditions: - TA = 25C, unless TC is specified - R pin not connected, with opt. P, Vo adjusted to Vo nom at Io nom Table 3a: Output data Output PSB 5A4 Characteristics Vo Output voltage 1 Io Output current IoL Output current limitation response 1 uo Output voltage noise typ PSB 123 min Vi nom, Io max 5.07 Vi min - Vi max TC min - TC max 0 5.0 0 4.0 5.0 6.5 4.0 5.2 Switching freq. Vi nom, Io max IEC/EN 61204 2 Total BW = 20 MHz max min typ 5.13 11.93 PSB 153 Conditions max min typ max Unit 12.07 14.91 15.09 V 0 4.0 A 4.0 5.2 15 35 25 45 40 70 19 39 29 49 44 74 DV o U Static line regulation Vi min - Vi max, Io max 20 45 30 55 50 75 DV o l Static load regulation Vi nom, Io = 0 - Io max 20 35 25 40 30 65 Vo d Dynamic load regulation td aUo Voltage deviat. Vi nom I 1/3 Io nom Recovery time o nom IEC/EN 61204 2 Temperature coefficient DVo/DTC (TC min - TC max) 100 100 100 50 60 60 Vi min - Vi max Io = 0 - Io max mVpp mV s 1 2 3 mV/K 0.02 0.02 0.02 %/K max Unit 48.29 V A Table 3b: Output data Output PSB 243 Characteristics Vo Output current IoL Output current limitation response 1 uo Output voltage noise min Vi nom, Io max Vi min - Vi max TC min - TC max Switching freq. Vi nom, Io max IEC/EN 61204 2 Total BW = 20 MHz typ PSB 363 typ PSB 483 max min max min 36.22 47.71 typ 23.86 24.14 35.78 0 4.0 0 4.0 0 4.0 4.0 5.2 4.0 5.2 4.0 5.2 45 120 70 180 90 190 50 125 75 185 95 195 DVo U Static line regulation Vi min - Vi max, Io max 70 150 100 200 150 300 DVo l Static load regulation Vi nom, Io = 0 - Io max 70 120 120 160 150 250 Vo d Dynamic load regulation aUo 2 1 Io td 1 Output voltage Conditions Voltage deviat. Vi nom I 1/3 Io nom Recovery time o nom IEC/EN 61204 2 Temperature coefficient DVo/DTC (TC min - TC max) 120 140 150 80 100 100 Vi min - Vi max Io = 0 - Io max Page 4 of 13 mV s 5 8 10 mV/K 0.02 0.02 0.02 %/K See also: Temperature Dependent Output Current Limitation Response I oL and: Thermal Considerations. See: Technical Information: Measuring and Testing. REV. OCT 17, 2003 mVpp PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Vo 05010 DV o I Vod DV o I Vod td td t I o/I o nom 1 0 t 10 s 10 s Thermal Considerations When a switching regulator is located in free, quasi-stationary air (convection cooling) at a temperature TA = 71C and is operated at its nominal output current Io nom, the case temperature TC will be about 95C after the warm-up phase, measured at the Measuring point of case temperature TC (see: Mechanical Data). Under practical operating conditions, the ambient temperature TA may exceed 71C, provided additional measures (heat sink, fan, etc.) are taken to ensure that the case temperature TC does not exceed its maximum value of 95C. With an input voltage above 80 V (up to 144 V) or an output current higher than Io nom (up to Io max) the maximum allowed temperatures are reduced according to fig.: Output current derating versus temperature. A check of the case temperature at worst case conditions (highest input voltage and highest output current of the application) against the applicable curve of the figure ensures correct operation of the system. Io /Io max Vi 80 V Vi 80 V 05027 1.0 Vi > 80 V Vi > 80 V TA max TC max 50 TA min TC min 46 60 A voltage suppressor diode which in worst case conditions fails into a short circuit, (or a thyristor crowbar, option C) protects the output against an internally generated overvoltage. Such an overvoltage could occur due to a failure of either the control circuit or the switching transistor. The output protection is not designed to withstand externally applied overvoltages. The user should ensure that systems with Power-One power supplies, in the event of a failure, do not result in an unsafe condition (fail-safe). Parallel and Series Connection Outputs of equal nominal voltages can be parallel-connected. However, the use of a single unit with higher output power, because of its power dissipation, is always a better solution. Fig. 3 Dynamic load regulation. 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 Output Protection 70 71 80 90 83 100 In parallel-connected operation, one or several outputs may operate continuously at their current limit knee-point which will cause an increase of the heat generation. Consequently, the max. ambient temperature value should be reduced by 10 K. Outputs can be series-connected with any other module. In series-connection the maximum output current is limited by the lowest current limitation. Electrically separated source voltages are needed for each module! Temperature dependent output current limitation response Io L These switching regulators withstand a continuous input voltage of up to 144 V DC (120 V +20%) with surges up to 156 V for 2 s. They also comply with LES-DB standard for VN = 110 V. Io max is continuously available over the entire temperature range for an input voltage up to 80 V, or over the whole input voltage range at a reduced maximum ambient temperature of TA max = 46C. For operation at TA = 46 to 71C together with an input voltage between 80 and 144 V the internal thermistor (PTC) starts to reduce the output current limitation value Io L. Under the most extreme conditions this results in a reduction of Io L by 1 A from Io max to Io nom. The fig.: Typical temperature dependent output current limitation response Io L shows the minimum Io L value for continuous operation with different ambient and case temperatures. Operation at higher ambient temperatures TA is possible, provided that the specified case temperature TC max is not exceeded (short term operation, heat sink, fan, etc.). TA, TC [C] Fig. 4 Output current derating versus temperature REV. OCT 17, 2003 Page 5 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) 05028 Io Auxiliary Functions TA = 46C, TC = 83C Io max i Inhibit for Remote On and Off Vi min 80 144 108 Vi [V] Fig. 5 Typical temperature dependent output current limitation response Io L. Short Circuit Behaviour Io max A constant current limitation circuit holds the output current almost constant whenever an overload or a short circuit is applied to the regulator's output. It acts self-protecting and recovers - in contrary to the fold back method - automatically after removal of the overload or short circuit condition. Vo /Vo nom 1.2 The inhibit input allows the switching regulator output to be disabled via a control signal. In systems with several units, this feature can be used, for example, to control the activation sequence of the regulators by a logic signal (TTL, C-MOS, etc.). An output voltage overshoot will not occur when switching on or off. Iinh [mA] 06034 5 4 3 2 1 Vo 0 10 20 30 40 Vinh [V] 50 Fig. 7 Typical inhibit current Iinh versus inhibit voltage Vinh 1.0 0.8 Io L 0.6 0.2 i 0.2 0.4 0.6 0.8 1.0 1.2 1.4 06009 Vo+ Vi+ 0.4 0 Vo off on 0 -50 -40 -30 -20 -10 05026 Vinh = 2.4 V TA = 71C, TC = 95C Io nom Note: With open i-input, output is enabled (Vo = on) Vinh = 0.8 V TA = 60C, TC = 90C 1A I inh Io /Io max Fig. 6 Overload, short-circuit behaviour Vo versus Io at Vi - 80 V or Io - Io nom. Vinh Go- Gi- Fig. 8 Definition of Iinh and Vinh 06001 Vo /Vo nom 1 0.1 0 tr tf t Inhibit 1 0 Fig. 9 Output response as a function of inhibit signal REV. OCT 17, 2003 Page 6 of 13 t PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Table 4: Inhibit characteristics Characteristics Vinh Vo = on Inhibit input voltage to keep regulator output voltage - Vo = off Conditions min Vi min - Vi max TC min - TC max typ max Unit -50 +0.8 V DC +2.4 +50 tr Switch-on time after inhibit command Switch-off time after inhibit command Vi = Vi nom RL = Vo nom /Io nom 12 tf Ii inh Input current when inhibited Vi = Vi nom 10 ms 24 mA R Control for Output Voltage Adjustment Vo+ Note: With open R input, Vo Vo nom. R excludes option P. The output voltage Vo can either be adjusted with an external voltage (Vext) or with an external resistor (R1 or R2). The adjustment range is 0...108% of Vo nom. The minimum differential voltage DVio min between input and output (see: Electrical Input Data) should be maintained. Under-voltage lock-out = Minimum input voltage. Vo+ R + Vext R + - R1 G Go - Fig. 11 Voltage adjustment with external resistor R1 or R2 06035 Vref 4000 b) Vo = 0 - 100% Vo nom, using R1 between R and G (Go-): + - R1 Vo Vo nom * ----------- R1 + 4000 G Go - Fig. 10 Voltage adjustment with Vext between R and G (Go-) a) Vo = 0 - 108% Vo nom, using Vext between R and G (Go-) Vo Vext Vext 2.5 V * ----- Vo Vo nom * ----- Vo nom 2.5 V Caution: To prevent damage Vex should not exceed 20 V, nor be negative and R2 should never be less than 47 k. REV. OCT 17, 2003 06036 Vref 4000 R2 4000 * Vo R1 ---------- Vo nom - Vo c) Vo = 100 - 108% Vo nom, using R2 between R and Vo+: 4000 * Vo * (Vo nom - 2.5 V) R2 ------------------------ 2.5 V * (Vo - Vo nom) Vo nom * 2.5 V * R2 Vo -------------------------------- 2.5 V * (R2 + 4000 ) - Vo nom * 4000 LED Output Voltage Indicator A yellow output indicator LED shines when the output voltage is higher than approx. 3 V. Page 7 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Electromagnetic Compatibility (EMC) Electromagnetic Immunity General condition: Case not earthed. Table 5: Immunity type tests Standard 1 MHz burst disturbance IEC 60255-22-1 Voltage surge IEC 60571-1 Electrostatic discharge 3 4 Class Level Coupling mode 2 Value applied Waveform Source Imped. Test procedure III i/o, i/c, o/c 2500 Vp 200 +i/-i, +o/-o 1000 Vp 400 damped 1 MHz waves/s 2 s per coupling mode i/c, +i/-i 800 Vp 100 s 100 1500 Vp 50 s 3000 Vp 5 s 4000 Vp 1 s 7000 Vp 100 ns In Peroper. form. 3 yes A5 yes B 10 positive and 10 negative discharges yes B45 80 - 1000 MHz yes A 1 pos. and 1 neg. voltage surge per coupling mode 330 IEC/EN 61000-4-2 3 contact discharge to case 6000 Vp 1/50 ns Electromagnetic IEC/EN field 61000-4-3 3 antenna 10 V/m AM 80% 1 kHz Electrical fast transient/burst IEC/EN 61000-4-4 4 i/c, +i/-i 4000 Vp bursts of 5/50 ns 5 kHz rep. rate transients with 15 ms burst duration and a 300 ms period 50 60s positive 60s negative bursts per coupling mode yes A45 Surge IEC/EN 61000-4-5 2 i/c 1000 Vp 12 yes A4 +i/-i 500 Vp 2 5 pos. and 5 neg. surges per coupling mode IEC/EN 61000-4-6 3 i, o, signal wires 140 dBV (10 VAC) 150 0.15 - 80 MHz yes A Conducted disturbances 1 1 Phenomenon 1.2/50 s AM 80% 1 kHz For related and previous standards see: Technical Information: Safety & EMC. 2 i = input, o = output, c = case. A = Normal operation, no deviation from specifications, B = Normal operation, temporary deviation from specs possible. Option L neccessary. 5 With option C, manual reset might be necessary. Electromagnetic Emission For emission levels refer to Electrical Input Data. [dBV] 90 07008 80 EN 55022 A 70 EN 55022 B 60 50 40 30 20 10 REV. OCT 17, 2003 20 30 10 5 2 1 0.5 0.1 0.05 MHz 0.02 0.01 0 Fig. 12 Typical disturbance voltage (quasi-peak) at the input according to EN 55011/22 measured at Vi nom and Io nom. Page 8 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Immunity to Environmental Conditions Table 6: Mechanical stress Test Method Standard Test Conditions Status Damp heat steady state IEC/DIN IEC 60068-2-3 MIL-STD-810D section 507.2 Temperature: Relative humidity: Duration: 40 2 C Ea Shock (half-sinusoidal) IEC/EN/DIN EN 60068-2-27 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 100 gn = 981 m/s2 6 ms 18 (3 each direction) Unit operating Eb Bump (half-sinusoidal) IEC/EN/DIN EN 60068-2-29 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 40 gn = 392 m/s2 6 ms 6000 (1000 each direction) Unit operating Fc Vibration (sinusoidal) IEC/EN/DIN EN 60068-2-6 MIL-STD-810D section 514.3 Acceleration amplitude: Unit operating Frequency (1 Oct/min): Test duration: 0.35 mm (10 - 60 Hz) 5 gn = 49 m/s2 (60 - 2000 Hz) 10 - 2000 Hz 7.5 h (2.5 h each axis) Ca Unit not operating 93 +2/-3 % 56 days Fda Random vibration wide band Reproducibility high IEC 60068-2-35 DIN 40046 part 23 Acceleration spectral density: Frequency band: Acceleration magnitude: Test duration: 0.05 g 2/Hz 20 - 500 Hz 4.9 grms 3 h (1 h each axis) Unit operating Kb Salt mist, cyclic (sodium chloride NaCl solution) IEC/EN/DIN IEC 60068-2-52 Concentration: Duration: Storage: Storage duration: Number of cycles: 5% (30C) 2 h per cycle 40C, 93% rel. humidity 22 h per cycle 3 Unit not operating Table 7: Temperature specifications, valid for air pressure of 800 - 1200 hPa (800 - 1200 mbar) Temperature 1 Standard -7 Option -9 Characteristics Conditions min max min max Unit TA Ambient temperature Operational 1 -25 71 -40 71 C TC Case temperature -25 95 -40 95 TS Storage temperature -40 100 -55 100 Non operational See: Thermal Considerations Table 8: MTBF and device hours MTBF MTBF acc. to MIL-HDBK-217F 1 Ground Benign Ground Fixed Ground Mobile TC = 40C TC = 40C TC = 70C TC = 50C 624 000 207 000 h 96 000 h 46 000 h Statistical values, based on an average of 4300 working hours per year and in general field use REV. OCT 17, 2003 Page 9 of 13 Device Hours 1 13 000 000 h PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Mechanical Data European Projection Dimensions in mm. Tolerances 0.3 mm unless otherwise specified. Gi- Go- 09013 Vo + Uo Uo G i R 8.1 1 106 1 6.35 1 32.2 0.5 V i+ Potentiometer (option P) 2.8 x 0.8 6.3 x 0.8 Yellow output voltage LED indicator 101(for M3 mounting screws) Fig. 13 Case B02, weight 230 g Aluminium, black finish and self cooling (4.7) 12.5 1 35 10.6 20 min. 6 10 2 7 2 36.5 1 3.1 69 1 (32.5) 5 0.5 Measuring point of case temperature TC (4.7) 10 10 (13.5) Safety and Installation Instructions Installation Instruction Cleaning Agents Installation of the switching regulators must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage, clearance, casualty, markings and segregation requirements of the end-use application. In order to avoid possible damage, any penetration of cleaning fluids is to be prevented, since the power supplies are not hermetically sealed. Check for hazardous voltages before altering any connections. Connections can be made using fast-on or soldering technique. The protection degree is IP 20. The input and the output circuit are not separated, i.e. the negative path is internally interconnected! All switching regulators are UL recognized according to UL 1950, UL 1012 and EN 60950 and UL recognized for Canada to CAN/CSA C22.2 No. 234-M90. The units should be connected to a secondary circuit. Do not open the module. Ensure that a unit failure (e.g. by an internal short-circuit) does not result in a hazardous condition. See also: Safety of operator accessible output circuit. REV. OCT 17, 2003 Protection Degree Standards and Approvals The units have been evaluated for: * Building in, * Operational insulation from input to output and input/ output to case, * The use in an overvoltage category II environment, * The use in a pollution degree 2 environment. Page 10 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) The switching regulators are subject to manufacturing surveillance in accordance with the above mentioned UL and CSA and with ISO 9001 standards. This test is performed as factory test in accordance with IEC/EN 60950 and UL 1950 and should not be repeated in the field. Power-One will not honour any guarantee claims resulting from electric strength field tests. Isolation Electric strength test voltage between input interconnected with output and case: 1500 VDC, 1 s. Safety of Operator Accessible Output Circuit If the output circuit of a switching regulator is operator-accessible, it shall be an SELV circuit according to IEC/EN 60950 related safety standards However, it is the sole responsibility of the installer or user to assure the compliance with the relevant and applicable safety regulations. The following table shows some possible installation configurations, compliance with which causes the output circuit of the switching regulator to be an SELV circuit according to IEC/EN 60950 up to a nominal output voltage of 30 V, or 48 V if option C is fitted. More information is given in Technical Information: Safety & EMC. Table 9: Insulation concept leading to an SELV output circuit Conditions Front end Supply voltage Minimum required grade of isolation, to be provided by the AC-DC front end, including mains supplied battery charger Battery Double or Reinforced supply, considered as secondary circuit Mains -250 V AC Basic Double or reinforced 1 3 4 5 Result Maximum DC output voltage from the front end 1 Minimum required safety status of the front end output circuit Measures to achieve the specified safety status of the output circuit Safety status of the switching regulator output circuit 60 V SELV circuit None SELV circuit >60 V 60 V 3 Earthed hazardous voltage Input fuse and non secondary circuit 2 accessible case 5 Earthed SELV circuit Unearthed hazardous voltage secondary circuit 5 Input fuse 3 and unearthed, non accessible case 5 Hazardous voltage secondary circuit Input fuse 3 and earthed output Earthed SELV circuit 4 and non accessible circuit case 5 Earthed SELV circuit 4 None ELV circuit Input fuse 3 and earthed output circuit 4 and non accessible case 5 >60 V Hazardous voltage secondary circuit 60 V SELV circuit >60 V 2 Switching regulator None Unearthed SELV circuit SELV circuit 3 Double or reinforced insu- Input fuse and unearthed lated unearthed hazardous and non accessible case 5 voltage secondary circuit 5 Unearthed SELV circuit The front end output voltage should match the specified input voltage range of the switching regulator. The conductor to the Gi- terminal of the switching regulator has to be connected to earth by the installer according to the relevant safety standard, e.g. IEC/EN 60950. The installer shall provide an approved fuse (slow blow type with the lowest current rating suitable for the application, max. 12.5 A) in a non-earthed input conductor directly at the input of the switching regulator. If Vo+ is earthed, insert the fuse in the Gi- line. For UL's purpose, the fuse needs to be UL-listed. If option C is fitted, a suitable fuse is already built-in in the Vi+ line. The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950. Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum output voltage from the front end. REV. OCT 17, 2003 Page 11 of 13 PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) Description of Options -9 Extended Temperature Range L The operational ambient temperature range is extended to TA = -40 to 71C. (TC = -40 to 95C, TS = -55 to 100C.) P Potentiometer Option P excludes R-function. The output voltage Vo can be adjusted with a screwdriver in the range from 92 108% Vo nom. However, the minimum differential voltage DVi o min between input and output voltages as specified in: Electrical Input Data should be maintained. Input Filter Option L is recommended to reduce superimposed interference voltages and to prevent oscillations, if input lines exceed approx. 5 m in total length. The fundamental wave (approx. 120 kHz) of the reduced interference voltage between Vi+ and Gi- has, with an input line inductance of 5 H, a maximum magnitude of 80 mVrms. A reduction can be achieved by insertion of a capacitor across the input (e.g. plastic foil between Vi+ and Gi-). The input impedance of the switching regulator at 120 kHz is about 17. The harmonics are small in comparison with the fundamental wave. See also: Electrical Input Data: RFI. With option L, the maximum permissible additionally superimposed ripple ui of the input voltage (rectifier mode) at a specified input frequency f i has the following values: ui max = 10 Vpp at 100 Hz or Vpp = 1000 Hz/ f i * 1V C Thyristor Crowbar This option is recommended to protect the load against power supply malfunction, but it is not designed to sink external currents. A fixed-value monitoring circuit checks the output voltage Vo . When the trigger voltage Vo c is reached, the thyristor crowbar triggers and disables the output. It may be deactivated by removal of the input voltage. In case of a switching transistor defect, an internal fuse prevents excessive current. Note: As a central overvoltage protection device, the crowbar is usually connected to the external load via distributed inductance of the lines. For this reason, the overvoltage at the load can temporarily exceed the trigger voltage Vo c. Depending on the application, further decentralized overvoltage protection elements may have to be used additionally. For further information see: Technical Information: Application Notes. Table 10: Crowbar trigger levels Characteristics Vo c Trigger voltage ts Delay time Conditions Vi min - Vi max Io = 0 - Io nom TC min - TC max 5.1 V 12 V 15 V 24 V 36 V 48 V min max min max min max min max min max min max 5.8 13.5 16.5 6.8 1.5 16 1.5 Accessories A variety of electrical and mechanical accessories are available including: - PCB-tags and isolation pads for easy and safe PCBmounting. - Ring core chockes for ripple and interference reduction. For more detailed information please refer to: Accessory Products on the Power-One homepage. REV. OCT 17, 2003 Page 12 of 13 19 1.5 27 31 1.5 40 45.5 1.5 55 Unit 60 V 1.5 s PSB Series Extended Data Sheet Positive Switching Regulators (Rugged) EC Declaration of Conformity We Power-One AG Ackerstrasse 56 CH-8610 Uster declare under our sole responsibility that all PSx Series switching regulators carrying the CE-mark are in conformity with the provisions of the Low Voltage Directive (LVD) 73/23/ EEC of the European Communities. Conformity with the directive is presumed by conformity wih the following harmonized standards: * EN 61204: 1995 (= IEC 61204: 1993, modified) Low-voltage power supply devices, d.c. output - Perfomance characteristics and safety requirements * EN 60950: 1992 + A1: 1993 + A2 (= IEC 950 second edition 1991 + A1: 1992 + A2: 1993) Safety of information technology equipment The installation instructions given in the corresponding data sheet describe correct installation leading to the presumption of conformity of the end product with the LVD. All PSx Series Switching Regulators are components, intended exclusively for inclusion within other equipment by an industrial assembly operation or by professional installers. They must not be operated as stand alone products. Hence conformity with the Electromagnetic Compatibility Directive 89/336/EEC (EMC Directive) needs not to be declared. Nevertheless, guidance is provided in most product application notes on how conformity of the end product with the indicated EMC standards under the responsibility of the installer can be achieved, from which conformity with the EMC directive can be presumed. Uster, 14 Oct. 2003 Power-One AG Rolf Baldauf Director Engineering REV. OCT 17, 2003 Page 13 of 13 Johann Milavec Director Projects and IP