15 Watts Total Power: Input Voltages: No. of Outputs: AEE04 AEE01-Dual 15 Watts 48V, 24V Single, Dual Electrical Specs Input Input range 18 to 36 VDC 36 to 75 VDC Efficiency 86% typical (3.3V) Output Special Features * * * * * * * 15 W, Single, Dual output High Efficiency 2:1 Input range 1.0" x 2.0" x 0.4 case Industry standard package Low Profile Low Cost Environmental Operating base temperature range: -40C to +105C Voltage tolerance 2.45 - 2.55V (2.5V) 3.24 - 3.36V (3.3V) 4.95 - 5.05V (5.0V) 11.88 - 12.12V (12.0V) Dual +12 (1%), -12V(5%) Overall regulation 1% max Dual +12V(1% max) -12V(10% max) Noise/ripple Transient response 2.5% (mV P-P) Max 2%Vo, 100 usec typical (25% step load change) Temperature Regulation 0.04 %Vo/C Switching frequency 290kHz Isolation I/O isolation Input to Case Output to Case 1500 VDC 1500 VDC 1500 VDC Storage temperature: -55C to +125C MTBF: 1.5 Million Hours (Belcore TR332) Safety 2 UL UL1950 Recognition CSA CSA22.2-950 Recognition TUV CE EN60950 Certified CE Mark North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211Asia (HK): 852-2437-9662 AMERICAS EUROPE ASIA 5810 Van Allen Way Carlsbad, CA 92008 Telephone: 760-930-4600 Facsimile: 760-930-0698 Astec House, Waterfront Business Park Merry Hill, Dudley West Midlands, DY5 1LX, UK Telephone: 44 (1384) 842-211 Facsimile: 44 (1384) 843-355 Units 2111-2116, Level 21 Tower1, Metroplaza 223, Hing Fong Road Fwai Fong, New Territories Hong Kong Telephone: 852-2437-9662 Facsimile: 852-2402-4426 Ordering Information Input Voltage Output Voltage Efficiency Model Number 18-36 V 3.3 @ 4.5 A 85% AEE04F24-197 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 36-75 V 2.5 @ 4.5 A 3.3 @ 4.5 A 3.3 @ 4.5 A 3.3 @ 4.5 A 3.3 @ 4.5 A 5.0 @ 3.0 A 5.0 @ 3.0 A 5.0 @ 3.0 A 5.0 @ 3.0 A 12.0 @ 1.25 A 12.0 @ 1.25 A 12.0 @ 1.25 A 12.0 @ 1.25 A 83% 86% 86% 86% 86% 87% 87% 87% 87% 87% 87% 87% 87% AEE04G48-197 AEE04F48-7 AEE04F48-97 AEE04F48-17 AEE04F48-197 AEE03A48-7 AEE03A48-97 AEE03A48-17 AEE03A48-197 AEE01B48-7 AEE01B48-97 AEE01B48-17 AEE01B48-197 36-75 V 12V @ .63A 87% AEE01BB48-7 NOTES: Enable Function: "1" = negative logic enable, without "1" = positive logic enable Trim Feature: "9" = Trim feature, without "9" = no Trim Pin length: "7" = 5.6mm pin length Mechanical Dimensions and Pin Assignments Notes: 1. Refer to Technical Reference Note (App Note) for recommended input/output filtering 2. All specifications are typical at nominal line, full load, and 25C unless otherwise noted. 3. All specifications subject to change without notice. 4. Mechanical drawings are for reference only. www.astec.com Rev: June 03 3 AEE-10W 12V Input Series Te c h n i c a l R e f e r e n c e N o t e s 5V, 12V, 15V Dual Output 10 Watt DC-DC Converter -1TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Introduction Design Features The AEE-10W 12V input dual output series of ! 2" X 1" package switching DC-DC converters is one of the most cost ! High efficiency ! High power density ! 10 watts of output power ! 2:1 wide input of 9-18V ! Remote ON/OFF function ! Input under-voltage lockout ! Output short circuit protection ! Output current limiting ! High input-output isolation voltage ! Wide operating case temperature range: effective options available in component power. The series uses an industry standard 1" X 2" package and pinout configuration, with CNT function available. AEE-10W 12V input dual output series uses a 2:1 input range of 9V to 18V, outputs are isolated from input and the converters are capable of providing up to 10 watts of output power. At start up, input current passes through an input filter designed to help meet CISPR 22 level A radiat- -25C~ +100C ed emissions, and Bellcore GR1089 conducted emissions. A fault clearing device such as a fuse should be used in line with the input to the module. The AEE-10W 12V input dual output converters are pulse width modulated (PWM) and operate at a nominal fixed frequency of 330 kHz. Feedback to the PWM controller uses an opto-isolator, maintaining complete isolation between primary and secondary. Caution should be taken to avoid ground loops when connecting the converters to ground. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -2www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Typical Application Fuse L1 +Vin +Vo C5 C1 Vin C2 K C3 + Load CNT COM C6 5V -Vin C4 + Load -Vo Note: The figure is Negative Control, and reverse Positive Control is available. K connects, output OFF. K disconnects or CNT is in midair, output ON. L1:Recommended: 10--12uH Fuse: 12Vin--4A C1 Recommended: 12Vin--220uF/25V electrolytic or ceramic type capacitor C2 Recommended: m 47uF/25V capacitor C3, C4 Recommended: 100uF/25V electrolytic or ceramic type capacitor C5, C6 Recommended: 0.47uF capacitor TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -3www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Block Diagram 4 +Vo +Vin 1 EMI Filter 5 COM OCP -Vin 2 6 -Vo To -Vin CNT 3 PWM Feedback Ordering Information Model Number TEL: FAX: Input Voltage Output Voltage AEE01AA12 9-18V 5V 1A 10 60 81% AEE01BB12 9-18V 12V 0.42A 10 90 84% AEE01CC12 9-18V 15V 0.34A 10 90 85% USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Output Ripple Noise Current (mV rms) (mV pp) typ typ Asia 852-2437-9662 852-2402-4426 Efficiency typ -4www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Absolute Maximum Rating Characteristic Min Typ Max Units Input Voltage(continuous) -0.3 200 Vdc Input Voltage(peak/surge) -0.3 50 Vdc Case temperature -25 100 C storage temperature -40 125 C Notes 50ms non-repetitive Input Characteristics Characteristic Min Typ Max Units 9 12 18 Vdc Input Reflected Current 10 %Iin Turn-off Input Voltage 7.6 Vdc Input Voltage Range Turn-on Input Voltage 8.4 Notes Vdc Turn On Time ms Control Function Characteristic Min Logic High Logic Low Typ Max Units Notes 3.6 6 Vdc Reverse logic option "P" available 0 0.7 Vdc Control Current mA General Specifications Characteristic MTBF Min Typ 3,000 Units Notes k Hrs Bellcore TR332, Tc=30C Isolation 1500 Vdc Pin solder temperature 260 C wave solder < 10 s 5 s iron temperature 425C Hand Soldering Time Weight TEL: FAX: Max USA 1-760-930-4600 1-760-930-0698 25 Europe 44-(0)1384-842-211 44-(0)1384-843-355 grams Asia 852-2437-9662 852-2402-4426 -5www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t AEE01AA12 Output Characteristics Characteristic Min Typ Max Units Power 10 W Output Current 1 A Output Setpoint Voltage 4.95 5 Notes 5.05 Vdc Vin=12V, Io=1A Line Regulation 0.2 %Vo Vin=9~18V, Io=1A Load Regulation 0.5 %Vo Io=0~1A, Vin=12V 100 %Vo Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s 100 %Vo Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s Dynamic Response 50-75% load 50-25% load Current Limit Threshold A Short Circuit Current A Efficiency 79 Trim Range 90 81 % 110 %Vo Over Voltage Protection Setpoint V Temperature Regulation TEL: FAX: Vin=12V, Io=1A, Ta=25C 0.04 %Vo/C Ripple (rms) 10 mV ( 0 to 20MHz Bandwidth ) Noise (p-p) 30 mV ( 0 to 20MHz Bandwidth ) Switching Frequency 330 kHz USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -6www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t AEE01BB12 Output Characteristics Characteristic Min Typ Power Output Current Output Setpoint Voltage Max Units 10 W 0.42 A 11.88 12 Notes 12.12 Vdc Vin=12V, Io=0.42A Line Regulation 0.2 %Vo Vin=9~18V, Io=0.42A Load Regulation 0.5 %Vo Io=0~0.42A, Vin=12V 100 mV Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s 100 mV Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s Dynamic Response 50-75% load 50-25% load Current Limit Threshold A Short Circuit Current A Efficiency 82 Trim Range 90 84 % 110 %Vo Over Voltage Protection Setpoint V Temperature Regulation 0.02 %Vo/C Ripple (rms) 10 mV ( 0 to 20MHz Bandwidth ) Noise (pp) 30 mV ( 0 to 20MHz Bandwidth ) 330 kHz Switching Frequency TEL: FAX: Vin=12V, Io=0.42A, Ta=25C USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -7www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t AEE01CC12 Output Characteristics Characteristic Min Typ Power Output Current Output Setpoint Voltage Max Units 10 W 0.68 A 14.85 15 Notes 15.15 Vdc Vin=15V, Io=0.34A Line Regulation 0.2 %Vo Vin=9~18V, Io=0.34A Load Regulation 0.5 %Vo Io=0~0.34A, Vin=12V 100 mV Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s 100 mV Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s Dynamic Response 50-75% load 50-25% load Current Limit Threshold A Short Circuit Current A Efficiency 83 Trim Range 90 85 % 110 %Vo Over Voltage Protection Setpoint V Temperature Regulation TEL: FAX: Vin=12V, Io=0.34A, Ta=25C 0.02 %Vo/C Ripple (rms) 10 mV ( 0 to 20MHz Bandwidth ) Noise (pp) 30 mV ( 0 to 20MHz Bandwidth ) Switching Frequency 330 kHz USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -8www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Characteristic Curves (at 25 C ) Typical Efficiency Curves Typical Input-Output Curves AEE-10W 12V Input Dual Output Series AEE-10W 12V Input Dual Output Series 87 1.6 Input Current (amps) Efficiency (%) 85 83 81 79 AEE01AA12 77 AEE00BB12 1.2 0.8 AEE01AA12 0.4 AEE00BB12 AEE00CC12 AEE00CC12 75 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 0.8 9 12 Output Current (Amps) 18 Typical Overcurrent Protection Cross Regulation Curves AEE-10W 12V Input Dual Output Series AEE01AA12 8 30 25 6 AEE01AA12 20 V1 (volts) Output Voltage (volts) 15 Input Voltage (volts) AEE00BB12 15 AEE00CC12 10 4 2 AEE01AA12 Io1=0 5 AEE01AA12 Io1=1A (max) 0 0 0 0.4 0.8 1.2 1.6 2 0 2.4 0.2 0.4 Output Curent (amps) 0.6 0.8 1 I2 (amps) Cross Regulation Curves Cross Regulation Curves AEE01BB12 AEE01CC12 14 18 12 15 12 V1 (volts) V1 (volts) 10 8 6 4 AEE00BB12 Io1=0 2 AEE00BB12 Io1=0.42A (max) 0.1 0.2 0.3 6 AEE00CC12 Io1=0 AEE00CC12 Io1=0.34A (max) 3 0 0 9 0.4 0.5 0 0 I2 (amps) TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 0.1 0.2 0.3 0.4 I2 (amps) Asia 852-2437-9662 852-2402-4426 -9www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t T ransient response TEL: FAX: (rated input voltage, step load, at 25 C) Typical Transient Response to Step Load Change from 25%-50%Iomax AEE01AA12 Typical Transient Response to Step Load Change from 75%-50%Iomax AEE01AA12 Typical Start-Up from Power On AEE01AA12 Typical Shut-down from Power Off AEE01AA12 Typical Start-up from Remote On/Off AEE01AA12 Typical Shut-down from Remote On/Off AEE01AA12 USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -10www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Pin Location Table 1 The +Vin and -Vin input connection pins are located as shown in Figure 1. AEE-10W 12V input dual output converters have a 2:1 input voltage range of 9-18V. Care should be taken to avoid applying reverse polarity to the input which can damage the converter. COM Fig.1 Pin Location Series Fuse Rating 12Vin 4A Input Reverse Voltage Voltage Protection Under installation and cabling conditions where reverse polarity across the input may occur, reverse polarity protection is recommended. Protection can easily be provided as shown in Figure 2. In both cases the diode rating is determined by the power of the converter. Diodes should be rated at 4A/25V for the AEE-10W 12V input dual output series. Placing the diode across the inputs rather than in-line with the input offers an advantage in that the diode only conducts in a reverse polarity condition, which increases circuit efficiency and thermal performance. Input Characteristic Fusing: The AEE-10W 12V input dual output power module has no internal fuse. An external fuse must always be employed! To meet international safety requirements, a 250 Volt rated fuse should be used. If one of the input lines is connected to chassis ground, then the fuse must be placed in the other input line. Standard safety agency regulations require input fusing. Recommended fuse ratings for the AEE-10W 12Vin dual output is shown in Table1. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 +Vin +Vin -Vin -Vin Fig.2 Reverse Polarity Protection Circuits Input Filter Input filters are included in the converters to help achieve standard system emissions certifications. Some users however, may find that additional input filtering is necessary. The AEE10W series has an internal switching frequency Asia 852-2437-9662 852-2402-4426 -11www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t of 330 kHz so a high frequency capacitor mounted close to the input terminals produces the best results. To reduce reflected noise, a capacitor can be added across the input as shown in Figure 3, forming a filter. A 47F/25V electrolytic capacitor is recommended for C1. +Vin C1 -Vin Fig.3 Ripple Rejection Input Filter For conditions where EMI is a concern, a different input filter can be used. Figure 4 shows an input filter designed to reduce EMI effects. L1 is a 12 H differential inductor, C1 is a 47F/25V electrolytic capacitor, and C0 is a 1F/25V metal film or ceramic high frequency capacitor. When a filter inductor L1 is connected in series with the power converter input, an input capacitor C0 should be added. An input capacitor C0 should also be used when the input wiring is long, since the wiring can act as an inductor. Failure to use an input capacitor under these conditions can produce large input voltage spikes and an unstable output. L1 C0 +Vin C1 -Vin Fig.4 EMI Reduction Input Filter TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Remote On/Off On/Off Control (optional) The AEE-10W 12V input dual output is negative logic, remote on/off turns the module off during a logic high on the remote on/off pin, and turns the module on during a logic low on the remote on/off pin. To turn the power module on or off, the user must supply a switch to control the voltage on the remote on/off pin, the switcher may be an open collector or equivalent (see Fig.5.). The logic low is Von/off = 0 V to +0.7V. The logic high is Von/off = +3.6V to +6V. The module has not internal capacitance to reduce noise at the on/off pin. Additional capacitance is needed. A 1F/25V electrolytic capacitor is recommended for C1. Vi(+) 5V C1 Vi(-) CNT Vcnt: ON--- Vcnt = 0 ~ +0.7V or CNT pin in midair OFF--- Vcnt = +3.6V ~ +6V C1: Recommended 1mF/25V Fig.5 Remote On/Off Control Input-Output Characteristic Isolation: The isolation voltage between input to output, input to case and case to output are all greater than 1500 Volt DC. If the system using the power module needs to meet safety agency approval, certain rules must be followed in the design of the system using the module. In particular, all of the creepage and clearance requirements of the end-use safety requirement must be observed. Also specific applications need to receive other or additional requirements. Asia 852-2437-9662 852-2402-4426 -12www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Safety Consideration: For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL1950, CSA C22.2 No. 950-95, and EN60950. The input-to-output 1500VDC isolation is an operational insulation. The DC/DC power module should be installed in end-use equipment, in compliance with the requirements of the ultimate application, and is intended to be supplied by an isolated secondary circuit. When the supply to the DC/DC power module meets all the requirements for SELV(<60Vdc), the output is considered to remain within SELV limits (level 3). If connected to a 60Vdc power system, double or reinforced insulation must be provided in the power supply that isolates the input from any hazardous voltages, including the ac mains. One Vi pin and one Vo pin are to be grounded or both the input and output pins are to be kept floating. Single fault testing in the power supply must be performed in combination with the DC/DC power module to demonstrate that the output meets the requirement for SELV. The input pins of the module are not operator accessible. Note: Do not ground either of the input pins of the module, without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pin and ground. Output Trimming: Trimming: AEE-10W 12V input dual output series does not have trim function. Output Over-Current Protection: AEE-10W 12V input series DC/DC converters feature foldback current limiting as part of their Overcurrent Protection (OCP) circuits. When output current exceeds 110 to 150% of rated current, such as during a short circuit condition, the output will shutdown. Note if input voltage exceeds 20V, the continuous shortcircuit may damage the module or decrease its life. Output Filters When the load is sensitive to ripple and noise, an output filter can be added to minimize the effects. A simple output filter to reduce output ripple and noise can be made by connecting a capacitor across the output as shown in Figure 6. The recommended value for the output capacitor is 100F/25V. Extra care should be taken when long leads or traces are used to provide power to the load. Long lead lengths increase the chance for noise to appear on the lines. Under these conditions C2 can be added across the load as shown in Figure 7. The recommended component for C2 is 100F/25V capacitor and connecting a 0.47F/25V ceramic capacitor in parallel generally. +Vout + Load C2 Output Characteristics -Vout Fig.6 Output Ripple Filter +Vout Minimum Load Requirements: There is no minimum load requirement for AEE-10W 12Vin dual output series modules. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 + C3 C2 Load -Vout Fig.7 Output Ripple Filter For a Distant Load Asia 852-2437-9662 852-2402-4426 -13www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Decoupling Noise on the power distribution system is not always created by the converter. High speed analog or digital loads with dynamic power demands can cause noise to cross the power inductor back onto the input lines. Noise can be reduced by decoupling the load. In most cases, connecting a 10 F tantalum capacitor in parallel with a 0.1F ceramic capacitor across the load will decouple it. The capacitors should be connected as close to the load as possible. Parallel Power Distribution Figure 10 shows a typical parallel power distribution design. Such designs, sometimes called daisy chains, can be used for very low output currents, but are not normally recommended. The voltage across loads far from the source can vary greatly depending on the IR drops along the leads and changes in the loads closer to the source. Dynamic load conditions increase the potential problems. I1 + I2 + I3 I2 + I3 Ground Loops Ground loops occur when different circuits are given multiple paths to common or earth ground, as shown in Figure 8. Multiple ground points can slightly different potential and cause current flow through the circuit from one point to another. This can result in additional noise in all the circuits. To eliminate the problem, circuits should be designed with a single ground connection as shown in Figure 9. RLine +Vout ( -Vout ) RLine Load Load RLine COM RLine RLine I3 RL2 RL1 RL3 +Vout Load 1 Load 2 Load 3 -Vout RG2 RG1 RG3 RL = Lead Resistance RG = Ground Lead Resistance Fig.10 Parallel Power Distribution Radial Power Distribution Radial power distribution is the preferred method of providing power to the load. Figure 11. shows how individual loads are connected directly to the power source. This arrangement requires additional power leads, but it avoids the voltage variation problems associated with the parallel power distribution technique. R Ground Loop +Vout Fig.8 Ground Loops RL3 RL1 RL2 Load 1 RG1 Load 2 Load 3 RG2 RG3 -Vout RL = Lead Resistance RG = Ground Lead Resistance RLine +Vout ( -Vout ) RLine Load Fig.11 Radial Power Distribution Load RLine COM RLine RLine Fig.9 Single Point Ground TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Mixed Distribution In the real world a combination of parallel and radial power distribution is often used. Dynamic and high current loads are connected using a Asia 852-2437-9662 852-2402-4426 -14www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t radial design, while static and low current loads can be connected in parallel. This combined approach minimizes the drawbacks of a parallel design when a purely radial design is not feasible. +Vout RL3 RL1 Load 1 RG1 RL4 RL2 Load 2 Load 3 Load 4 RG2 RG3 -Vout RG4 RL = Lead Resistance RG = Ground Lead Resistance Fig. 12 Mixed Power Distribution Redundant Operation A common requirement in high reliability systems is to provide redundant power supplies. The easiest way to do this is to place two converters in parallel, providing fault tolerance but not load sharing. Oring diodes should be used to ensure that failure of one converter will not cause failure of the second. Figure 13 shows such an arrangement. Upon application of power, one of the converters will provide a slightly higher output voltage and will support the full load demand. The second converter will see a zero load condition and will "idle". If the first converter should fail, the second converter will support the full load. When designing redundant converter circuits, Shottky diodes should be used to minimize the forward voltage drop. The voltage drop across the Shottky diodes must also be considered when determining load voltage requirements. +Vout -Vout Load +Vout -Vout Fig.13 Redundant Operation TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 AEE-10W 12V Input Dual Output Series Mechanical Considerations Installation Although AEE-10W 12V input dual output series converters can be mounted in any orientation, free air-flowing must be taken. Normally power components are always put at the end of the airflow path or have the separate airflow paths. This can keep other system equipment cooler and increase component life spans. Soldering AEE-10W 12V input dual output series converters are compatible with standard wave soldering techniques. When wave soldering, the converter pins should be preheated for 20-30 seconds at 110 C, and wave soldered at 260C for less than 10 seconds. When hand soldering, the iron temperature should be maintained at 425C and applied to the converter pins for less than 5 seconds. Longer exposure can cause internal damage to the converter. Cleaning can be performed with cleaning solvent IPA or with water. MTBF The MTBF, calculated in accordance with Bellcore TR-NWT-000332 is 3,000,000 hours. Obtaining this MTBF in practice is entirely possible. If the ambient air temperature is expected to exceed +25C, then we also advise a oriented for the best possible cooling in the air stream. ASTEC can offer custom solutions. Please contact the factory for details. Asia 852-2437-9662 852-2402-4426 -15www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Module Derating 100 Maximum Case Temperature Percent maximum output power Typical derating curves 80 Safe Operating Area 60 40 20 0 -20 -10 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperature in degrees C Mechanical Chart: COM CNT 6 TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -16www.astec.com AEE-10W 12V Input Series DC-DC Converters 5 V, 1 2 V, 1 5 V 1 0 Wa t t D u a l O u t p u t Electrical Specs Nominal Output Output Input Voltage Current Ripple Noise Efficiency Capacitive (mV rms) (mV pp) (%) Load typ max min typ (f) (V) (V) (A) typ max AEE02F12* 12 3.3 2.5 7 20 40 75 75 76 1000 AEE02A12* 12 5 2 7 20 40 75 77 78 1000 AEE01B12* 12 12 0.84 10 20 30 75 81 82 100 AEE01C12* 12 15 0.67 10 20 30 75 81 82 100 AEE02F24** 24 3.3 2.5 7 20 40 75 75 76 1000 AEE02A24** 24 5 2 7 20 40 75 77 78 1000 AEE01B24** 24 12 0.84 10 20 30 75 81 82 100 AEE01C24** 24 15 0.67 10 20 30 75 81 82 100 AEE02F48** 48 3.3 2.5 7 20 40 75 75 77 1000 AEE02A48** 48 5 2 7 20 40 75 77 80 2200 AEE01B48** 48 12 0.84 10 20 30 75 81 82 330 AEE01C48** 48 15 0.67 10 20 30 75 81 8 330 AEE01AA12* 12 5 1 10 20 60 100 77 79 100*** AEE00BB12* 12 12 0.42 10 20 90 100 81 83 100*** AEE00CC12* 12 15 0.33 10 20 90 100 81 83 47*** AEE01AA24 24 5 1 10 20 60 100 77 79 100*** AEE00BB24 24 12 0.42 10 20 90 100 81 83 100*** AEE00CC24 24 15 0.33 10 20 90 100 81 83 47*** AEE01AA48 48 5 1 10 20 60 100 77 79 100*** AEE00BB48 48 12 0.42 10 20 90 100 81 85 150*** AEE00CC48 48 15 0.33 10 20 90 100 81 83 47*** * The detailed information can reference to the " AEE-10W 12V input series application manual.". ** The detailed information can reference to the " AEE-10W signal output series application manual". *** " Load per output. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -17www.astec.com