AV 6 0 A D u a l O u t p u t H a l f - b r i c k Te c h n i c a l R e f e r e n c e N o t e s 48V Input, 5V/3.3V and 3.3V/2.5V Dual Output 75W DC-DC Converter (REV 01) 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 -1Publishing Date: 20020625 AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Introduction Features AV60A dual output series provides two inde- 1. Two independent positive outputs pendent and fully regulated positive outputs, 2. Each output is separately trimmable the outputs are also separately trimmable. A 3. CNT function remote on/off feature is included as standard. AV60A dual output isolated DC/DC converters is built using the industry standard half-brick 4. High efficiency 5. High power density 6. Low output noise pin-out and package 61.0mm x 57.9mm x 7. Metal baseplate 12.7mm (2.4" x 2.28" x 0.5"). Typical efficien8. Input undervoltage protection cies are 82% for the 5V/3.3V outputs, and 80% for the 3.3V/2.5V outputs. The AV60A dual output series is available with 2:1 input range of 9. Short circuit protection 10. Over current protection 36V-75V, and with output combination of 11. Output overvoltage protection 5V/3.3V and 3.3V/2.5V at maximum current of 12. Wide operating -40C ~ 100C case temperature: 15 Amps. The maximum current can be drawn from either output, or in any combination, as long as the total output current does not exceed 15 Amps. The output power is 75W. The inputoutput isolation is 1500Vdc. AV60A dual output series is designed to meet CISPR22, FCC Class A, UL, TUV, and CSA certifications. 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 AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Typical Application Fuse* +Vo2 +Vin C4 C5 C2 C3 Load2 -Vo2 CNT Vin C1 CNT Trim2 CASE +Vo1 C6 Load1 -Vo1 -Vin Trim1 NOTE: The figure is Positive Logic Control, if the CNT pin is left open, the converter will default to "control on" operation. Negative Logic Control is also available. Positive Logic Control: Low=Off, Negative Logic Control: Low=On, High=On. High=Off. Recommended External components: Fuse* : Recommended: 3~4A. C1 : Recommended 470F/100V. C3=C5 : Recommended electrolytic capacitor of 470F/16V. C2=C4 : Recommended metallitic film capacitor of 0.47F/16V. C6 : Recommended 0.01F/1500V. Block Diagram +Vin 1 EMI Filter -Vin 4 +Vo1 5 -Vo1 6 Trim1 7 +Vo2 8 -Vo2 9 Trim2 OCP 2 To -Vin Feedback CNT 3 PWM PWM 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 Error AMP -3www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Ordering Information Model Number Input Voltage (V) Output Voltage (V) 48 5, 3.3 AV60A-048L-050D033 AV60A-048L-033D025 AV60A-048L-050D033N* AV60A-048L-033D025N* 48 48 48 3.3, 2.5 5, 3.3 3.3, 2.5 Output Current (A) 15, 15* 15, 15* 15, 15* 15, 15* Ripple (mV rms) max Noise Efficiency (mV pp) (%) max min typ 30 25 30 25 150 150 150 150 80 78 80 78 notes and conditions 82 Io1=15A, Io2=0A 82 Io1=7.5A, Io2=7.5A 79 Io1=1.5A, Io2=15A 80 Io1=15A, Io2=0A 80 Io1=7.5A, Io2=7.5A 76 Io1=1.5A, Io2=15A 82 Io1=15A, Io2=0A 82 Io1=7.5A, Io2=7.5A 79 Io1=1.5A, Io2=15A 80 Io1=15A, Io2=0A 80 Io1=7.5A, Io2=7.5A 76 Io1=1.5A, Io2=15A Note: The maximum output current of auxiliary output Vo2 is 12A when the case temperature is between 80~100C. The products with suffix `N' refer to the negative logic control products, default is positive logic control. The products with suffix `-7' refer to products with pin length of 5.8mm. The products with suffix `-6' refer to products with pin length of 3.8mm. The products with suffix `-8' refer to products with pin length of 2.8mm. Default pin length is 4.8mm. 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 -4www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Absolute Maximum Rating Characteristic Min Input Voltage(continuous) Typ Max Units -0.3 80 Vdc Input Voltage(peak/surge) -0.3 100 Vdc Case temperature -40 100 C storage temperature -55 125 C Notes 100ms non-repetitive Input Characteristics Characteristic Input Voltage Range Min Typ Max Units 36 48 75 Vdc 200 mAp-p Input Reflected Current Notes Vin=48V, Io1=7.5A, Io2=7.5A Turn-off Input Voltage 30 33 35 V Io1=7.5A, Io2=7.5A Turn-on Input Voltage 31 34 36 V Io1=7.5A, Io2=7.5A Turn On Time 5 ms Turn On Delay 10 ms CNT Function Characteristic Min Typ Max Units Notes Logic High 5 15 Vdc Logic Low 0 1.2 Vdc 2 mA Max Units Notes k Hrs Bellcore TR332, 25C Control Current Reverse logic option available. General Specifications Characteristic MTBF Min Typ 2300 Isolation 1500 Vdc Pin solder temperature 260 C 5 s 65 grams Hand Soldering Time Weight 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 wave solder < 15 s iron temperature 425C -5www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T AV60A-048L-033D025(N) Output Characteristics Characteristic Min Power Output Current Output Setpoint Voltage Typ Max Units 75 W 15/15 A Notes 3.25 3.3 3.35 Vdc Vin=48V, Io1=7.5A, Io2=7.5A 2.45 2.5 2.55 Vdc Vin=48V, Io1=7.5A,Io2=7.5A Line Regulation Vo1 0.2 %Vo Vin=36~75V, Io1=7.5A, Io2=7.5A Vo2 0.2 %Vo Vin=36~75V, Io1=7.5A, Io2=7.5A Vo1 0.5 %Vo Io1=0~15A, Io2=0A, Vin=48V Vo2 0.5 %Vo Io1=1.5A, Io2=0~15A, Vin=48V 5 %Vo Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s 5 %Vo Ta=25C, DI/Dt=1A/10s 200 s Ta=25C, DI/Dt=1A/10s A Vin=48V,Io1+Io2 Load Regulation Dynamic Response 50-75% load 50-25% load Current Limit Threshold 16.5 Short Circuit Current 25 170 Iomax% Vin=48V, Io1=Io2=7.5A 80 % Vin=48V, Io1=Io2=7.5A Efficiency 78 Trim Range 90 110 %Vo Over Voltage Protection Setpoint 4.0 5 V Vo=3.3V 3.0 3.9 V Vo=2.5V 0.03 %Vo/C Ripple (rms) 25 mV ( 0-20MHz BW ) Noise (p-p) 150 mV ( 0-20MHz BW ) Vin=48V, Io1=7.5A, Io2=7.5A Temperature Regulation TEL: FAX: Over Temperature Protection 105 C Switching Frequency 300 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 AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T AV60A-048L-050D033(N) Output Characteristics Characteristic Min Power Output Current Output Setpoint Voltage Typ Max Units 75 W 15/15 A Notes 4.95 5 5.05 Vdc Vin=48V, Io1=7.5A, Io2=7.5A 3.25 3.3 3.35 Vdc Vin=48V, Io1=7.5A,Io2=7.5A Line Regulation Vo1 0.2 %Vo Vin=36~75V, Io1=7.5A, Io2=7.5A Vo2 0.2 %Vo Vin=36~75V, Io1=7.5A, Io2=7.5A Vo1 0.5 %Vo Io1=0~15A, Io2=0A, Vin=48V Vo2 0.5 %Vo Io1=0.5A, Io2=0~15A, Vin=48V 5 %Vo T=25C, DI/Dt=1A/10s 200 s T=25C, DI/Dt=1A/10s 5 %Vo T=25C, DI/Dt=1A/10s 200 s T=25C, DI/Dt=1A/10s A Vin=48V,Io1+Io2 Load Regulation Dynamic Response 50-75% load 50-25% load Current Limit Threshold 16.5 Short Circuit Current 25 170 Iomax% Vin=48V, Io1=Io2=7.5A 82 % Vin=48V, Io1=Io2=7.5A Efficiency 80 Trim Range 90 110 %Vo 5.75 7 V Vo=5V 4.0 5 V Vo=3.3V 0.03 %Vo/C Ripple (rms) 30 mV ( 0-20MHz BW ) Noise (p-p) 150 mV ( 0-20MHz BW ) Vin=48V, Io1=7.5A, Io2=7.5A Over Voltage Protection Temperature Regulation TEL: FAX: Over Temperature Protection 105 C Switching Frequency 300 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 -7www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Characteristic Curves AV60A-048L-050D033(N) Typical Efficiency vs Vin 5V@0.5A; 3.3V:load variable 90 85 80 80 70 Efficiency (%) Efficiency (%) AV60A-048L-050D033(N) Typical Efficiency vs Vin 5V:load variable; 3.3V:no load Vin=75V Vin=48V 60 Vin=36V 75 Vin=75V 70 Vin=48V Vin=36V 65 60 50 0 3 6 9 12 0 15 3 12 15 AV60A-048L-033D025(N) Typical Efficiency vs Vin 3.3V@1.5A; 2.5V:load variable 90 80 80 75 Efficiency (%) Efficiency (%) AV60A-048L-033D025(N) Typical Efficiency vs Vin 3.3V:load variable; 2.5V:no load Vin=75V Vin=48V Vin=36V 70 Vin=75V Vin=48V Vin=36V 65 60 50 60 0 3 6 9 12 15 0 USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 3 6 9 12 15 Output Current (amps) Output Current (amps) TEL: FAX: 9 Output Current (amps) Output Current (amps) 70 6 Asia 852-2437-9662 852-2402-4426 -8www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Characteristic Curves (continued ) AV60A-048L-033D025(N) Typical Cross Regulation AV60A-048L-050D033(N) Typical Cross Regulation 3.34 Output Voltage Vo1 (volts) Output Voltage Vo1 (volts) 5.008 5.000 4.992 Vin=75V Vin=48V Vin=36V 4.984 3.33 3.32 Vin=75V Vin=48V Vin=36V 3.31 3.3 4.976 0 3 6 9 12 0 15 3 12 15 AV60A-048L-033D025(N) Typical Overcurrent Performance AV60A-048L-050D033(N) Typical Overcurrent Performance 5.3 3.6 Output Voltage (volts) 4.7 Output Voltage (volts) 9 Output Current Io2 (amps) Output Current Io2 (amps) 4.1 3.5 Vin=75V 2.9 Vin=48V 2.3 Vin=36V 1.7 1.1 3.0 2.4 1.8 Vin=75V Vin=48V Vin=36V 1.2 0.6 0 0 3 6 9 12 15 18 21 0 USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 3 6 9 12 15 18 21 Output Current (amps) Output Current (amps) TEL: FAX: 6 Asia 852-2437-9662 852-2402-4426 -9www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Characteristic Curves (continued ) AV60A-048L-050D033(N) Typical Output Voltage Startup From Power On AV60A-048L-033D025(N) Typical Output Voltage Startup From Power On AV60A-048L-033D025(P) Typical Transient Response 25%- 50%- 25% AV60A-048L-050D033(P) Typical Transient Response 25%- 50%- 25% Typical Output Current Safe Operating Area vs Case Temperature (Natural Convection) Output Current Io2(A) 15A max 12A SOA Case Temperature -40C TEL: FAX: USA 1-760-930-4600 1-760-930-0698 80 100C Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 -10www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Pin Location The +Vin and -Vin input connection pins are located as shown in Figure 1. AV60A dual output converters have a 2:1 input voltage range and 48 Vin converters can accept 36-75 Vdc. Care should be taken to avoid applying reverse polarity to the input which can damage the converter. Trim1 +Vin 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 7.5A/100V. 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. -Vo1 2.40 (60.96) CNT +Vo1 Trim2 CASE -Vo2 -Vin Fig.1 Pins Location ( baseplate-side footprint ) Input Characteristic Fusing The AV60A 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 AV60A dual output series are 6-8A. USA 1-760-930-4600 1-760-930-0698 +Vin -Vin -Vin Fig.2. Reverse Polarity Protection Circuits +Vo2 2.28 (57.91) TEL: FAX: +Vin Europe 44-(0)1384-842-211 44-(0)1384-843-355 Input Undervoltage Protection The AV60A series is protected against undervoltage on the input. If the input voltage drops below the acceptable range, the converter will shut down. It will automatically restart when the undervoltage condition is removed. 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 AV60A series has an internal switching frequency of 300 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 470F/100V electrolytic capacitor is recommended for C1. For conditions where EMI is a concern, a differ- Asia 852-2437-9662 852-2402-4426 -11www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T CNT +Vin C1 -Vin -Vin Fig.5 Simple Control Fig.3 Ripple Rejection Input Filter CNT ent input filter can be used. Figure 4 shows an input filter designed to reduce EMI effects. C1 is -Vin a 470F/100V electrolytic capacitor, and C2 is a 1F/100V metal film or ceramic high frequency capacitor, Cy1 and Cy2 are each Fig.6 Transistor Control CNT 1000pF/1500Vdc high frequency ceramic capacitors, and L1 is a 1mH common mode choke. -Vin Fig.7 Isolated Control +Vin C2 Cy1 Cy2 CNT C1 L1 -Vin -Vin Fig.8 Relay Control Fig.4 EMI Reduction Input Filter When a filter inductor is connected in series with the power converter input, an input capacitor C1 should be added. An input capacitor C1 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. CNT Function The AV60A dual output series provides a control function allowing the user to turn the output on and off using an external circuit. Two remote on/off options are available. Positive logic applying a voltage less than 1.2V to the CNT pin will disable the output, and applying a volt- TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 age greater than 5V will enable it. Negative logic applying a voltage less than 1.2V to the CNT pin will enable the output, and applying a voltage greater than 5V will disable it. The performance of the converter between these two points will depend on the individual converter and whether the control voltage is increasing or decreasing. If the CNT pin is left open, the converter will default to "control on" operation for positive logic, but default to "Control off" for negative logic. The maximum voltage that can be applied to the control pin is 15 volts. If the CNT function is not used: Negative logic: connect CNT pin to Vi(-). Positive logic: leave CNT pin open. Asia 852-2437-9662 852-2402-4426 -12www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Input-Output Characteristic 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. Case Grounding For proper operation of the module, the case or baseplate of the The AV60A dual output series module does not require a connection to a chassis ground. If the series is not in a metallic enclosure in a system, it may be advisable to directly ground the case to reduce electric field emissions. Leaving the case floating can help to reduce magnetic field radiation from common TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 mode noise currents. If the case has to be grounded for safety or other reasons, an inductor can be connected to chassis at DC and AC line frequencies, but be left floating at switching frequencies. Under the condition, the safety requirements are met and the emissions are minimized. Output Characteristics Minimum Load Requirement In order to maintain proper operation and specifications, there is a 1.5A minimum load requirement on +Vo1(3.3V output) for AV60A-048L033D025(N), and 0.5A minimum load requirement on +Vo1(5V output) for AV60A-048L050D033(N). Contact the factory for details. Output Over-Voltage Over-Voltage Protection The over-voltage protection has a separate feedback loop which activates when the output voltage is between 120% and 150% of the nominal output voltage. When an over-voltage condition occurs, a " turn off " signal was sent to the input of the module which will shut down the output. The module will restart after power on again. Output Trimming Trimming Users can increase or decrease the output voltage by adding an external resistor between the TRIM pin and either the Vo (+ ) or Vo ( - ) pins. The trim resistor should be positioned close to the module. If the trim feature is not used, leave the TRIM pin open. Trimming up by more than 10% of the nominal output may damage the converter. Trimming down more than 10% can cause the converter to regulate improperly. Trim down and trim up circuits and equations are shown in following Figures. Note that at elevated output voltages the maximum power rating of the module remains the same, and the output current capability will decrease correspondingly. Asia 852-2437-9662 852-2402-4426 -13www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T component-side footprint Vo2+ Vo2+ -Vin -Vin Vo2- Case Vo2Case Trim2 Trim2 Vo1+ Vo1+ CNT CNT Load Vo1+Vin Vo1- Ru1 Trim1 +Vin AV60A-048L-050D033(N): ( 5.76 - Vo' ) x 3.3 5V Out: Ru1= Vo' - 5 3.3V Out: Ru2= AV60A-048L-033D025(N): AV60A-048L-033D025(N): ( 3.776 - Vo' ) x 5.11 3.3V Out: Ru1= Vo' - 3.3 2.5V Out: Ru2= ( 3.1388 - Vo' ) x 10 Vo' - 2.5 Fig.12 Output Voltage Vo2 Trim-up 3.63 Output Voltage Trim-up ( volts ) 5.5 Output Voltage Trim-up ( volts ) ( 5.825 - Vo' ) x 0.33 Vo' - 3.3 Where Vo is the output voltage after trim-up. Ru2 is in k. Fig.9 Output Voltage Vo1 Trim-up 5.45 5.4 5.35 5.3 5.25 5.2 5.15 5.1 5.05 3.597 3.564 3.531 3.498 3.465 3.432 3.399 3.366 3.333 5 0 5 0 10 15 20 25 30 35 40 45 50 Fig.10 Typical Trim-up Curves for AV60A-048L-050D033(N) 5V Outputs Output Voltage Trim-up ( volts ) 3.564 3.531 3.498 3.465 3.432 3.399 3.366 10 18 26 34 42 50 58 66 9 12 15 18 21 24 27 74 2.75 2.725 2.7 2.675 2.65 2.625 2.6 2.575 2.55 2.525 0 25 50 75 100 125 150175 200 225 250 Adjustment Resistor Value (k) Fig.11 Typical Trim-up Curves for AV60A-048L-033D025(N) 3.3V Outputs USA 1-760-930-4600 1-760-930-0698 6 Fig.13 Typical Trim-up Curves for AV60A-048L-050D033(N) 3.3V Outputs 3.63 3.597 3.333 2 3 Adjustment Resistor Value (k) Adjustment Resistor Value (k) Output Voltage Trim-up ( volts ) Trim1 AV60A-048L-050D033(N): Where Vo is the output voltage after trim-up. Ru1 is in k. TEL: FAX: Load Ru2 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Adjustment Resistor Value (k) Fig.14 Typical Trim-up Curves for AV60A-048L-033D025(N) 2.5V Outputs Asia 852-2437-9662 852-2402-4426 -14www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T component-side footprint Vo2+ Vo2+ -Vin -Vin CASE Case CNT Rd1 Vo1- Vo1+Vin Load AV60A-048L-050D033(N): ( Vo' - 2.89 ) x 0.66 3.3-Vo' ( Vo' - 4.42 ) x 4.3 5V Out: Rd1= 5-Vo' 3.3V Out: Rd2 = AV60A-048L-033D025(N): AV60A-048L-033D025(N): ( Vo' - 2.785) x 6.8 3.3V Out: Rd1= 3.3-Vo' 2.5V Out: Rd2 = Where Vo' is the output voltage after trim-down. Rd1 is in k. Where Vo' is the output voltage after trim-down. Rd2 is in k. Fig.15 Output Voltage Vo1 Trim-down Output Voltage Trim-down ( volts ) 4.95 4.9 4.85 4.8 4.75 4.7 4.65 4.6 4.55 ( Vo' - 2.0773 ) x 15.11 2.5-Vo' Fig.18 Output Voltage Vo2 Trim-down 5 Output Voltage Trim-down ( volts ) Trim1 Trim1 AV60A-048L-050D033(N): 4.5 3.3 3.267 3.234 3.201 3.168 3.135 3.102 3.069 3.036 3.003 2.97 0 5 10 15 20 25 30 35 40 0 45 Fig.16 Typical Trim-down Curves for AV60A-048L-050D033(N) 5V Outputs 3.234 3.201 3.168 3.135 3.102 3.069 3.036 3.003 2.97 0 10 20 30 40 50 60 70 80 90 100 USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 3 4 5 6 7 8 2.475 2.45 2.425 2.4 2.375 2.35 2.325 2.3 2.275 2.25 0 25 50 75 100 125 150175 200 225 250 Adjustment Resistor Value (k) Adjustment Resistor Value (k) Fig.17 Typical Trim-down Curves for AV60A-048L-033D025(N) 3.3V Outputs 2 Fig.19 Typical Trim-down Curves for AV60A-048L-050D033(N) 3.3V Outputs Output Voltage Trim-down ( volts ) 3.3 3.267 1 Adjustment Resistor Value (k) Adjustment Resistor Value (k) Output Voltage Trim-down ( volts ) Trim2 Vo1+ Vo1+ CNT TEL: FAX: Load Trim2 +Vin Rd2 Vo2- Vo2- Fig.20 Typical Trim-down Curves for AV60A-048L-033D025(N) 2.5V Outputs Asia 852-2437-9662 852-2402-4426 -15www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Output Over-Current Protection AV60A dual output DC/DC converters feature continuously current limiting as part of their Overcurrent Protection (OCP) circuits. When output current exceeds 110 to 140% of rated current, such as during a short circuit condition, the output will shutdown immediately, and can tolerate short circuit conditions indefinitely. When the overcurrent condition is removed, the converter will automatically restart. 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 21. The recommended value for the output capacitor C1 is 470F/16V. +Vout C1 Load 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. Ground Loops Ground loops occur when different circuits are given multiple paths to common or earth ground, as shown in Figure 23. 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 24. -Vout RLine RLine +Vout Fig.21. Output Ripple Filter Load Load RLine -Vout RLine RLine 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 22. The recommended component for C2 is 470F/16V capacitor and connecting a 0.1F ceramic capacitor C1 in parallel generally. +Vout C1 C2 Load -Vout Fig.22 Output Ripple Filter For a Distant Load TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Ground Loop RLine Fig.23 Ground Loops RLine RLine +Vout Load Load RLine -Vout RLine RLine Fig.24 Single Point Ground Parallel Power Distribution Figure 25 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 Asia 852-2437-9662 852-2402-4426 -16www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T 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 I3 RL2 RL1 RL3 +Vout Load 1 Load 2 Load 3 -Vout RG2 RG1 RG3 RL = Lead Resistance RG = Ground Lead Resistance Fig.25 Parallel Power Distribution Radial Power Distribution Radial power distribution is the preferred method of providing power to the load. Figure 26 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. +Vout RL3 RL1 RL2 Load 1 Load 2 Load 3 RG2 RG1 RG3 -Vout RL = Lead Resistance RG = Ground Lead Resistance Fig.26 Radial Power Distribution 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 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 RG1 RL4 RL2 Load 1 Load 2 Load 3 Load 4 RG2 RG3 -Vout RG4 RL = Lead Resistance RG = Ground Lead Resistance Fig.27 Mixed Power Distribution TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Thermal Management Technologies AV60A dual output series modules feature high efficiency, the 5V/3.3 V output units have typical efficiency of 82% at full load, and the 3.3V/2.5V output units have typical efficiency of 80% at full load. With less heat dissipation and temperature-resistant components such as ceramic capacitors, these modules exhibit good behavior during prolonged exposure to high temperatures. Maintaining the operating case temperature (Tc) within the specified range help keep internal-component temperatures within their specifications which in turn help keep MTBF from falling below the specified rating. Proper cooling of the power modules is also necessary for reliable and consistent operation. Basic Thermal Management Measuring the case temperature of the module (Tc) as the method shown in Figure 28 can verify the proper cooling. Figure 28 shows the metal surface of the module and the pin locations. The module should work under 90C for the reliability of operation and TC must not exceed 100 C while operating in the final system configuration. The measurement can be made with a surface probe after the module has reached thermal equilibrium. If a heat sink is mounted to the case, make the measurement as close as possible to the indicated position. It makes the assumption that the final system configuration exists and can be used for a test environment. The following text and graphs show guidelines to predict the thermal performance of the module for typical configurations that include heat sinks in natural or forced airflow environments. Note that Tc of module must always be checked Asia 852-2437-9662 852-2402-4426 -17www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T 29.0 (1.14) MEASURE CASE TEMPERATURE HERE +Vo2 -Vin 30.5 (1.2) -Vo2 CASE 19.00 17.00 Power Dissipation (W) in the final system configuration to verify proper operational due to the variation in test conditions. 15.00 13.00 11.00 9.00 7.00 Vin=75V 5.00 Trim2 Vin=48V Vin=36V 3.00 +Vo1 0 CNT 1.5 3 -Vo1 +Vin Trim1 4.5 6 7.5 9 10.5 12 13.5 15 Output Current (amps) Fig.29 AV60A-048L-050D033(N) Power Dissipation Curves, 5V:load variable, 3.3V:no load Pin-side View Dimensions: millimeters (inches) tion below: PD = PI - PO where : PI is input power; PO is output power; PD is dissipated power. Also, module efficiency () is defined as the following equation: = PO / PI If eliminating the input power term, from two above equations can yield the equation below: PD = PO ( 1 - ) / The module power dissipation then can be calculated through the equation. Because each power module output voltage has a different power dissipation curve, a plot of power dissipation versus output current over three different line voltages is given in each module-specific data sheet. The typical power dissipation curves of AV60A series are shown as figure 29 to figure 32. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Power Dissipation (W) Thermal management acts to transfer the heat dissipated by the module to the surrounding environment. The amount of power dissipated by the module as heat (PD) is got by the equa- 17.00 15.00 13.00 11.00 9.00 Vin=75V 7.00 Vin=48V Vin=36V 5.00 0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Output Current (amps) Fig.30 AV60A-048L-050D033(N) Power Dissipation Curves, 5V@1.5A, 3.3V:load variable 13.00 12.00 Power Dissipation (W) Fig.28 Case Temperature Measurement ( component-side footprint ) 11.00 10.00 9.00 8.00 7.00 6.00 5.00 Vin=75V 4.00 Vin=48V Vin=36V 3.00 0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Output Current (amps) Fig.31 AV60A-048L-033D025(N) Power Dissipation Curves, 3.3V:load variable, 2.5V:no load Asia 852-2437-9662 852-2402-4426 -18www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T 25 4.0 m/s (800 ft./min.) 3.0 m/s (600 ft./min.) 2.0 m/s (400 ft./min.) 1.0 m/s (200 ft./min.) 0.5 m/s (100 ft./min.) 20 13.50 12.00 10.50 9.00 7.50 6.00 Vin=75V Vin=48V 4.50 Power Dissipation PD (W) Power Dissipation (W) 15.00 15 Natural Convection (10-20 ft./min.) 10 5 Vin=36V 3.00 0 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Output Current (amps) 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperature, TA (C) Fig.32 AV60A-048L-033D025(N) Power Dissipation Curves, 3.3V@1.5A, 2.5V:load variable Module Derating Experiment Setup From the experimental set up shown in figure 33, the derating curves as figure 34 can be drawn. Note that the PWB ( printed-wiring board ) and the module must be mounted vertically. The passage has a rectangular crosssection. The clearance between the facing PWB and the top of the module is kept 13 mm (0.5 in.) constantly. 13(0.5) PWB facing PWB Air velocity and Ambient Temperature Testing Point Module 50.8(2.0) Air flow Dimensions: millimeters (inches). Fig.34 Forced Convection Power Derating without Heat Sink Convection Without Without Heat Sinks Heat transfer can be enhanced by increasing the airflow over the module. Figure 34 shows the maximum power that can be dissipated by the module. In the test, natural convection airflow was measured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.). The 0.5 m/s to 4.0 m/s (100 ft./min. to 800 ft./min.) curves are tested with externally adjustable fans. The appropriate airflow for a given operating condition can be determined through figure 34. Example 1. How to calculate the minimum airflow required to maintain a desired Tc? If a AV60A-048L-050D033(N) module operates with a 48V line voltage, a 15 A of Io2, and a 40 C maximum ambient temperature, What is the minimum airflow necessary for the operating? Determine PD ( referenced Fig.30 ) with condition: Vin = 48V, lO1 = 1.5A, lO2 = 15A Get: PD = 15.5W From: TA = 40 C Determine airflow ( Fig.34 ): v = 2 m/s ( 400 ft./min. ) Fig.33 Experiment Set Up 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 -19www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Example 2. How to calculate the maximum output power of a module in a certain convection and a max. TA? What is the maximum power output for a AV60A-048L-050D033(N) operating at following conditions: Vin = 48V v = 2.0 m/s (400 ft./min.) TA = 40 C Determine PD ( Fig.34 ) PD = 16 W Determine IO (Fig. 29 ): IO = 14.5 A Calculate PO: PO = (VO) x (IO) = 5 x 14.5 = 72.5 W Although the two examples above use 100 C as the maximum case temperature, for extremely high reliability applications, one may design to a lower case temperature as shown in Example 4 on page 22. Heat Sink Configuration Several standard heat sinks are available for the AV60A dual output modules as shown in Figure 35 to Figure 37. 57.0 (2.24) 4.9(0.193) Fig.35 Non Standard Heatsink WDL02540 1/4 IN. WDL05040 1/2 IN. 61 (2.4) WDL10040 1 IN. 57.9 (2.28) Dimensions: millimeters (inches). Fig.36 Longitudinal Fins Heat Sink TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 1/4 IN. WDT05040 1/2 IN. 57.9 (2.28) WDT10040 1 IN. 61 (2.4) Dimensions: millimeters (inches). Fig.37 Transverse Fins Heat Sink The heat sinks mount to the top surface of the module with screws torqued to 0.56 N-m (5 in.lb). A thermally conductive dry pad or thermal grease is placed between the case and the heat sink to minimize contact resistance (typically 0.1 C/W to 0.3 C/W) and temperature differential. Nomenclature for heat sink configurations is as follows: WDxyyy40 where: x = fin orientation: longitudinal (L) or trans verse (T) yyy = heat sink height (in 100ths of inch) For example, WDT5040 is a heat sink that is transverse mounted (see Figure 25) for a 61 mm x 57.9 mm (2.4 in.x 2.28 in.) module with a heat sink height of 0.5 in. 11.8 (0.465) Dimensions: millimeters (inches). 89.1(3.51) WDT02540 Heatsink Mounting Advice A crucial part of the thermal design strategy is the thermal interface between the baseplate of the module and the heatsink. Inadequate measures taken here will quickly negate any other attempts to control the baseplate temperature. For example, using a conventional dry insulator can result in a case-heatsink thermal impedance of >0.5 C/W, while use one of the recommended interface methods (silicon grease or thermal pads available from ASTEC) can result in a case-heatsink thermal impedance around 0.1C/W. Asia 852-2437-9662 852-2402-4426 -20www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Determine PD ( referenced Fig.31 ) with condition: Vin = 48 V IO = 15 A TA = 40 C Get: PD = 11.5 W Determine Heat Sink (Fig.39 ): 1/2 in. allows up to TA = 40 C Fig.38 Heat Sink Mounting Natural Convection with Heat Sink The power derating for a module with the heat sinks ( shown as figure 35 to figure 37) in natural convection is shown in figure 39. In this test, nature convection generates airflow about 0.05 m/s to 0.1 m/s ( 10ft./min to 20ft./min ). POWER DISSIPATION, PD (W) 35 30 1 1/2 in. 1 in. 1/2 in. 1/4 in. NONE 25 20 15 10 5 0 0 10 20 30 40 50 60 70 80 90 100 LOCAL AMBIENT TEMPERATURE, TA (C) Fig.39 Heat Sink Power Derating Curves, Natural Convection Basic Thermal Model There is another approach to analyze module thermal performance, to model the overall thermal resistance of the module. This presentation method is especially useful when considering heat sinks. The following equation can be used to calculate the total thermal resistance . RCA = TC, max / PD Where RCA is the total module thermal resistance. TC, max is the maximum case temperature rise. PD is the module power dissipation. In this model, PD, TC, max, and RCA are equals to current flow, voltage drop, and electrical resistance, respectively, in Ohm's law, as shown in Figure 40. Also, TC, max is defined as the difference between the module case temperature (TC) and the inlet ambient temperature (TA). TC, max = TC - TA Where TC is the module case temperature; TA is the inlet ambient temperature. Figure 39 can be used for heat-sink selection in natural convection environment. RcA THERMAL RESISTANCE PD Example 3. How to select a heat sink? What heat sink would be appropriate for a AV60A-048L-033D025(N) in a natural convection environment at nominal line, full load, and maximum ambient temperature of 40C? TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Fig.40 Basic Thermal Resistance Model For AV60A dual output series converters, the module's thermal resistance values versus air Asia 852-2437-9662 852-2402-4426 -21www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T velocity have been determined experimentally and shown in figure 41. The highest values on each curve represents the point of natural convection. Case-Ambient Thermal Resistance R CA (C/W) 8 7 1 in. heat sink 6 1/2 in. heat sink 1/4 in. heat sink 5 NO heat sink 4 3 2 1 0 0 0.5(100) 1.0(200) 1.5(300) 2.0(400) 2.5(500) 3.0(600) Air Velocity m/s (ft./min.) Fig.41 Case-to-Ambient Thermal Resistance Curves; Either Orientation Figure 41 is used for determining thermal performance under various conditions of airflow and heat sink configurations. Example 4. How to determine the allowable minimum airflow to heat sink combinations necessary for a module under a desired Tc and a certain condition? Although the maximum case temperature for the AV60A dual output series converters is 100 C, you can improve module reliability by limiting Tc,max to a lower value. How to decide? For example, what is the allowable minimum airflow for AV60A-048L-050D033(N) heat sink combinations at desired Tc of 80 C? The working condition is as following: Vin = 48V IO1 = 1.5 A IO2 = 13.5 A TA = 40 C. Determine PD ( Fig.30 ) PD = 13.5 W Then solve RCA: RCA = TC, TEL: FAX: RCA = (TC - TA) / PD RCA = (80 - 40) / 13.5 = 3 C/W determine air velocity from figure 41: If no heat sink: v = 2.7 m/s (540 ft./min.) If 1/4 in. heat sink: v = 1.9 m/s (380 ft./min.) If 1/2 in. heat sink: v = 1.2 m/s (24 ft./min.) If 1 in. heat sink: v = 0.4 m/s (80 ft./min.) USA 1-760-930-4600 1-760-930-0698 max / PD Europe 44-(0)1384-842-211 44-(0)1384-843-355 Example 5. How to determine case temperature ( Tc ) for the various heat sink configurations at certain air velocity? What is the allowable Tc for AV60A-048L033D025(N) heat sink configurations at desired air velocity of 2.0 m/s, and it is operating at a 48 V line voltage, a total output current of 15A, a 40 C maximum ambient temperature? Determine PD ( Fig. 32. ) with condition: Vi = 48V IO1 = 1.5 A, IO2 = 13.5 A TA = 40 C v = 2.0 m/s (400 ft./min.) Get: PD = 11.5 W Determine TC: TC = (RCA x PD) + TA Determine the corresponding thermal resistances ( RCA ) from Figure 41: No heat sink: RCA = 3.8 C/W TC = (3.8 x 11.5) + 40 = 83.7 C 1/4 in. heat sink: RCA = 2.8 C/W TC = (2.8 x 11.5) + 40 = 72.2 C 1/2 in. heat sink: RCA = 2.0 C/W TC = (2 x 11.5) + 40 = 63 C 1 in. heat sink: RCA = 1.2 C/W TC = (1.2 x 11.5) + 40 = 53.8 C In this configuration, the module does not need the heat sink and the power module does not exceed the maximum case temperature of 100 C. Asia 852-2437-9662 852-2402-4426 -22www.astec.com AV 6 0 A D U A L O U T P U T H A L F - B R I C K P O W E R C O N V E R T E R S 3 6 V D C T O 7 5 V D C I N P U T, 7 5 WAT T O U T P U T Longer exposure can cause internal damage to the converter. Cleaning can be performed with cleaning solvent IPA or with water. Mechanical Considerations Installation Although AV60A dual output 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. MTBF The MTBF, calculated in accordance with Bellcore TR-NWT-000332 is 2,300,000 hours. Obtaining this MTBF in practice is entirely possible. It means providing forced air cooling of at least 300 LFM. If the ambient air temperature is expected to exceed +25C, then we also advise a heatsink on the AV60A series, oriented for the best possible cooling in the air stream. ASTEC can supply replacements for converters from other manufacturers, or offer custom solutions. Please contact the factory for details. Soldering AV60A dual output 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 15 seconds. When hand soldering, the iron temperature should be maintained at 450C and applied to the converter pins for less than 5 seconds. Mechanical Chart ( baseplate-side footprint ) 5.1 (0.2) 61.0 (2.4) 5.1 (0.2) Trim1 +Vin 7.62 (0.3) 10.16 (0.4) -Vo1 7.62 (0.3) CNT +Vo1 15.24 (0.6) 10.16 (0.4) Trim2 Case 7.62 (0.3) 10.16 (0.4) -Vo2 7.62 (0.3) -Vin +Vo2 Mounting Inserts M3 thru hole x4 12.70 (0.5) 4.8 (0.19) 48.26 (1.9) 57.9 (2.28) 12.7 (0.5) 5.8 (0.23) Optional 10 - 1.0(0.04) Pin Length Option 3.80mm ! 0.25mm 0.150in. ! 0.010in. 2.80mm ! 0.25mm 0.110in. ! 0.010in. 5.8mm ! 0.5mm 0.228in. ! 0.020in. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Device Code Suffix -6 -8 -7 mm (inches) Tolerances: Inches .xx !0.020 .xxx !0.010 Pins >4mm <4mm Asia 852-2437-9662 852-2402-4426 Millimeters .x !0.5 .xx !0.25 !0.02inch ( !0.5mm) !0.01inch ( !0.25mm) -23www.astec.com PART NUMBER DESCRIPTION ss pp c - 0 iv L - iv = Input Voltage 05 = Range centered on 5V 12 = Range centered on 12V 24 = 18 to 36(2:1), 9 to 36V(4:1) 36 = 20 to 60V 46 = 18V to 75V (4:1) 48 = Typ 36 to 75V xxx f - yy h n p - mx-Options p = Pin Length Omit this digit for Standard 5mm 6 = 3.8mm, 7= 5.8mm 8 = 2.8mm Enable Logic Polarity Omit for Positive Enable Logic N = Negative Enable Except: AK60C-20H, BK60C-30H Omit for Negative Logice P = Positive Logic c = Pinout compatability A= Astec Footprint or "non Lucent" footprint C= Ind Std, Exact Lucent drop in pp = Package Type 40 = 1" x 2" SMD 42 = 1.5" x 2" SMD 45 = 1.45" X 2.3" (1/4 Brk) 60 = 2.4" X 2.3" (1/2 Brk) 80 = Full size 4.6" x 2.4" 72= 2.35" X 3.3 (3/4 Brk) H = High Efficiency (Synch rect.) Omit H if Conventional Diode (low Eff) yy = Output Current ie. 08 = 8 Amps f = # of Outputs F = Single Output D = Dual Output xxx = Output Voltage Format is XX.X (ie 1.8V = 018) ss = Series AA = 1/2brick Dual (Old designator) mx = Options M1,M2 = .25" Height Heatsink M3,M4 = .5" height Heatsink M5.M6 = 1.0" Height Heatsink AK = Ind Std sizes (1/4, 1/2, full) <150W AM/BM = Full size, astec pin out AL = Half size, astec pin-out BK = Ind Std size =>150W or feature rich AV = Avansys Product Note: For some products, they may not conform with the PART NUMBER DESCRIPTION above absolutely. REVISION Q ATTACHMENT I Page 1 of 2 NEW PART NUMBER DESCRIPTION A c s ii V1 V2 V3 Output Voltage A = 5.0V F = 3.3V G = 2.5V D = 2.0V / 2.1V Y = 1.8V M = 1.5V K = 1.2V J = 0.9V Vin - e t p Mx E = 7.5V B = 12V, C = 15V L = 8V, H = 24V, R = 28V Omit V2 and V3 if Single Output Omit V3 if Dual Output ie for Dual Output 5 and 3.3V V1 =A, V2 = F, V3 =Omit V1 =A, V2 = F, V3 =Omit ii = Output Current Max ie 60 = 60 Amps Vin = Input Voltage range 300 = 250V to 450V 48 = 36V to 75V 24 = 18V to 36V 03 = 1.8V to 5.0V 08 = 5.0V to 13.0V PFC: Power Factor Corrected S = Size F = Full Brick H = Half Brick Q = Quarter Brick S = 1 X 2 18 Pin SMT E = 1 X 2 Thru Hole C = (.53X1.3X.33) SMT (Austin Lite drop in) V = Conventional Package (2X2.56") or ( A = SIP W = Convent pkg (Wide 2.5X3) R = 1 X 1 Thru Hole A = SIP T = 1.6 X 2 E = Enable Logic for > 15W Omit this digit for Positive enable N = Negative Logic E = Enable Logic for < 15W Omit this digit for no enable option 1 = Negative Logic 4 = Positive Logic c = Construction E = Enhanced Thermals (Baseplate or adapter plate) I = Integrated (Full Featured) Hong Kong models L = Low Profile (Open Frame, No case - Isolated) P = Open Frame (SIP or SMT) non-isolated Trim for 1W to 15W 9 = Trim Added P = Pin Length Omit this digit for Standard 5mm 6 = 3.8mm 8 = 2.8mm 7 = 5.8 mm Mx - Factory Options customer Specific Note: For some products, they may not conform with the NEW PART NUMBER DESCRIPTION above absolutely. REVISION Q ATTACHMENT I Page 2 of 2