AV 6 0 C H a l f - b r i c k S e r i e s Te c h n i c a l R e f e r e n c e N o t e s 48V Input, 3.3V Output 50-150W DC-DC Converter (Rev01) -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 Publishing Date: 20020626 AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Introduction Feature The AV60C half-brick series of switching DC- ! High Efficiency DC converters is one of the most cost effective ! High power density ! Low output noise ! Metal baseplate ! CNT function sense functions, also features high power den- ! Remote sense sity up to 54.8W/in3 which gives more selectiv- ! Trim function ity to meet small size requirement. ! Input under-voltage lockout AV60C half-brick series comes in 48V input ver- ! Output short circuit protection ! Output current limiting ! Output over-voltage protection ! Overtemperature protection ! High input-output isolation voltage options available in component power. The AV60C series uses an industry standard package size of 2.4" x 2.28" x 0.5" and pinout configuration, provides standard control, trim, and sion with a 2:1 ( 36-75V ) input range. This series has input LVP, output OVP, OCP, short circuit protection and over temperature protection. There are isolated single output 3.3V, 5V, 12V, 15V and the isolation voltage is 1500Vdc. This series is designed to meet CISPR22, FCC class A, UL and CSA certifications. The design features of the AV60C half-brick Options series set a new standard for high density power converters. The unit employs an alu- ! Heat sink available for extended operation minum baseplate to carry all of the power com- ! Choice of CNT logic configuration ponents, and conduct the dissipated heat to the ambient. A conventional, multi-layer printed circuit board, over the top of the power substrate, contains all of the small signal control circuitry, all constructed with automated SMD technology. 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 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Typical Application Fuse* +Vin +Sense +Vout CNT Vin Trim Case C1 C3 C4 C2 Load -Vout -Vin -Sense Fuse*: Use external fuse ( fast blow type ) for each unit. Rated output 50W : 5A fuse Rated output 75W : 7.5A fuse Rated output 100W : 10A fuse Rated output 150W : 20A fuse C1: Recommended input capacitor C1 -20 C ~ +100 C: m 47F/100V electrolytic or ceramic type capacitor. -40 C ~ +100 C: m 47F/100V ceramic type capacitor only. C2: Recommended output capacitor C2 -20 C ~ +100 C: 1000F/10V (electrolytic capacitor) for 50W-75W 2200F/10V (electrolytic capacitor) for 100W-150W -40 C ~ +100 C: For this temperature range, use two pieces of the recommended capacitor above. C3: Recommended 4700pF/2000V C4: Recommended 0.1F/10V 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 AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Block Diagram +Vin +Vout -Vin -Vout +Sense Trim -Sense CNT Ordering Information TEL: FAX: Model Number Input Voltage Output Voltage Output Current Ripple (mV rms) Noise (mV pp) Efficiency min. typ. AV60C-048L-033F10 36-75V 3.3V 10A 40 150 78% 81% AV60C-048L-033F10N 36-75V 3.3V 10A 40 150 78% 81% AV60C-048L-033F15 36-75V 3.3V 15A 40 150 78% 81% AV60C-048L-033F15N 36-75V 3.3V 15A 40 150 78% 81% AV60C-048L-033F20 36-75V 3.3V 20A 40 150 78% 81% AV60C-048L-033F20N 36-75V 3.3V 20A 40 150 78% 81% AV60C-048L-033F30 36-75V 3.3V 30A 40 150 78% 81% AV60C-048L-033F30N 36-75V 3.3V 30A 40 150 78% 81% 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 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Absolute Maximum Rating Characteristic Min Typ Max Units Input Voltage(continuous) -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 Min Typ Max Input Voltage Range 36 48 75 Vdc 30 50 mAp-p Input Reflected Current Units Turn-off Input Voltage 30 33 35 V Turn-on Input Voltage 31 34 36 V 10 35 ms Typ Max Units 15 Vdc 1.2 Vdc 2 mA Turn On Time Notes CNT Function Characteristic Logic High Min 3 Logic Low Control Current Notes General Specifications Characteristic MTBF Min Typ 2000 Units Notes k Hrs Bellcore TR332, Tc=40C 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 75 Europe 44-(0)1384-842-211 44-(0)1384-843-355 grams Asia 852-2437-9662 852-2402-4426 -5www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output AV60C-048L-033F10(N) Output Characteristics Characteristic Min Typ Power Max Units 50 Output Current 1 Notes W 10 A 3.3 3.333 Vdc Vin=48V, Io=10A Line Regulation 0.02 0.2 %Vo Vin=36~75V, Io=10A Load Regulation 0.1 0.5 %Vo Io=0~10A, Vin=48V 2.5 %Vo Ta=25C, DI/Dt=1A/10s 100 s Ta=25C, DI/Dt=1A/10s 2.5 %Vo Ta=25C, DI/Dt=1A/10s 100 s Ta=25C, DI/Dt=1A/10s Output Setpoint Voltage 3.267 Dynamic Response 50-75% load 50-25% load Current Limit Threshold 11 13 Short Circuit Current A 17 A 81 % Efficiency 78 Trim Range 90 110 %Vo Over Voltage Protection Setpoint 3.9 5 V Sense Compensation 10 %Vo Temperature Regulation 0.02 %Vo/C Vin=48V, Io=10A 5%Vo each leg Ripple (rms) 20 40 mV ( 0 to 20MHz Bandwidth ) Noise (p-p) 100 150 mV ( 0 to 20MHz Bandwidth ) Over Temperature Protection 105 C Switching Frequency 300 kHz Maximum Capacitor Load TEL: FAX: 14 USA 1-760-930-4600 1-760-930-0698 10000 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 F -6www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output AV60C-048L-033F15(N) Output Characteristics Characteristic Min Typ Power Max Units 75 Output Current 1.5 Output Setpoint Voltage 3.267 Notes W 15 A 3.3 3.333 Vdc Vin=48V, Io=15A Line Regulation 0.02 0.2 %Vo Vin=36~75V, Io=15A Load Regulation 0.1 0.5 %Vo Io=0~15A, Vin=48V 2.5 5 %Vo Ta=25C, DI/Dt=1A/10s 100 250 s Ta=25C, DI/Dt=1A/10s 2.5 5 %Vo Ta=25C, DI/Dt=1A/10s 100 250 s Ta=25C, DI/Dt=1A/10s 19 21 A Dynamic Response 50-75% load 50-25% load Current Limit Threshold 16.5 Short Circuit Current A 81 % Efficiency 78 Trim Range 90 110 %Vo Over Voltage Protection Setpoint 3.9 5 V Sense Compensation 10 %Vo Temperature Regulation 0.02 %Vo/C Vin=48V, Io=15A 5%Vo each leg Ripple (rms) 20 40 mV ( 0 to 20MHz Bandwidth ) Noise (p-p) 100 150 mV ( 0 to 20MHz Bandwidth ) Over Temperature Protection 105 C Switching Frequency 300 kHz Maximum Capacitor Load TEL: FAX: 25 USA 1-760-930-4600 1-760-930-0698 10000 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 F -7www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output AV60C-048L-033F20(N) Output Characteristics Characteristic Min Power Typ Max Units 100 Output Current 2 Output Setpoint Voltage 3.267 Notes W 20 A 3.3 3.333 Vdc Vin=48V, Io=20A Line Regulation 0.02 0.2 %Vo Vin=36~75V, Io=20A Load Regulation 0.1 0.5 %Vo Io=0~20A, Vin=48V 2.5 5 %Vo Ta=25C, DI/Dt=1A/10s 100 250 s Ta=25C, DI/Dt=1A/10s 2.5 5 %Vo Ta=25C, DI/Dt=1A/10s 100 250 s Ta=25C, DI/Dt=1A/10s 25 28 A Dynamic Response 50-75% load 50-25% load Current Limit Threshold 22 Short Circuit Current 34 A 81 % Efficiency 78 Trim Range 90 110 %Vo Over Voltage Protection Setpoint 3.9 5 V 10 %Vo 0.02 %Vo/C 20 40 mV ( 0 to 20MHz Bandwidth ) Noise (pp) 100 150 mV ( 0 to 20MHz Bandwidth ) Over Temperature Protection 105 C Switching Frequency 300 kHz Sense Compensation Temperature Regulation Ripple (rms) Maximum Capacitor Load TEL: FAX: USA 1-760-930-4600 1-760-930-0698 10000 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 Vin=48V, Io=20A 5%Vo each leg F -8www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output AV60C-048L-033F30(N) Output Characteristics Characteristic Min Power Typ Max Units 150 Output Current 3 Notes W 30 A 3.3 3.333 Vdc Vin=48V, Io=30A Line Regulation 0.02 0.2 %Vo Vin=36~75V, Io=30A Load Regulation 0.1 0.5 %Vo Io=0~30A, Vin=48V 2.5 5 %Vo Ta=25C, DI/Dt=1A/10s 100 250 s Ta=25C, DI/Dt=1A/10s 2.5 5 %Vo Ta=25C, DI/Dt=1A/10s 100 250 s Ta=25C, DI/Dt=1A/10s 36 40 A Output Setpoint Voltage 3.267 Dynamic Response 50-75% load 50-25% load Current Limit Threshold 32 Short Circuit Current 50 A 81 % Efficiency 78 Trim Range 90 110 %Vo Over Voltage Protection Setpoint 3.9 5 V 10 %Vo 0.02 %Vo/C 20 40 mV ( 0 to 20MHz Bandwidth ) Noise (pp) 100 150 mV ( 0 to 20MHz Bandwidth ) Over Temperature Protection 105 C Switching Frequency 300 kHz Sense Compensation Temperature Regulation Ripple (rms) Maximum Capacitor Load TEL: FAX: USA 1-760-930-4600 1-760-930-0698 10000 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Asia 852-2437-9662 852-2402-4426 Vin=48V, Io=30A 5%Vo each leg F -9www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Ef ficiency Characteristic Curves Typical Efficiency AV60C-048L-033F15N 85 85 80 80 75 70 36V Efficiency (%) Efficiency (%) Typical Efficiency AV60C-048L-033F10N (at 25 C ) 75 36V 70 48V 48V 75V 65 75V 65 60 60 0 10 20 30 40 50 60 70 80 90 0 100 10 20 30 40 %Io 60 70 80 85 80 80 Efficiency (%) 85 75 100 70 36V 75 36V 70 48V 48V 75V 65 75V 65 60 60 0 10 20 30 40 50 60 70 80 90 100 0 10 Io% TEL: FAX: 90 Typical Efficiency AV60C-048L-033F30N Typical Efficiency AV60C-048L-033F20N Efficiency (%) 50 Io% USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 20 30 40 50 60 70 80 90 100 Io% Asia 852-2437-9662 852-2402-4426 -10www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Overcurrent Protection (OCP) (at 25 C ) Typical Output Overcurrent Performance AV60C-048L-033F15N 3.5 3.5 3 3 Output Voltage (volts) Output Voltage (volts) Typical Output Overcurrent Performance AV60C-048L-033F10N 2.5 2 Vin=36V Vin=48V Vin=75V 1.5 1 0.5 2.5 2 Vin=36V Vin=48V Vin=75V 1.5 1 0.5 0 5 10 15 20 0 10 Typical Output Overcurrent Performance AV60C-048L-033F20N 3.5 Output Voltage (volts) Output Voltage (volts) 30 Typical Output Overcurrent Performance AV60C-048L-033F30N 3.5 3 2.5 Vin=36V Vin=48V Vin=75V 2 1.5 3 2.5 Vin=36V Vin=48V Vin=75V 2 1.5 1 0 10 20 30 40 10 USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 20 30 40 50 Output Current (amps) Output Current (amps) TEL: FAX: 20 Output Current (amps) Output Current (amps) Asia 852-2437-9662 852-2402-4426 -11www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output T ransient response (at 25 C ) Typical Transient Response Load Increased from 50%Iomax to 75%Iomax AV60C-048L-033F30N Typical Transient Response Load Decreased from 50%Iomax to 25%Iomax AV60C-048L-033F30N Typical Start-Up from Remote CNT AV60C-048L-033F30N Typical Shut-down from Remote CNT AV60C-048L-033F30N Typical Output Voltage Start-up From Power On 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 -12www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output mined by the power of the converter. Diodes value should be selected as Table 1 showing. Pins The +Vin and -Vin input connection pins are located as shown in Figure 1. AV60C half-brick series has 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. -Vin -Vout Case -Sense Trim CNT +Sense +Vin +Vout Component-side footprint Fig.1 Pin Location Input Characteristic Fusing The AV60C half-brick power modules have 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 AV60C half-brick series are shown in Table 1. 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 deter- TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Table 1 Rated Pout Fuse Rating 50 Watt 75 Watt 100 Watt 150 Watt 5A 7.5A 10A 20A 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 Undervoltage Protection The AV60C half-brick 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. +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 AV60C half-brick 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 Asia 852-2437-9662 852-2402-4426 -13www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output input as shown in Figure 3, forming a filter. A 47F/100V 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. C1 is a 47F/100V electrolytic capacitor, and C2 is a 1F/100V metal film or ceramic high frequency capacitor, Cy1 and Cy2 are each CNT Function Two CNT options are available. Negative logic applying a voltage less than 1.2V to the CNT pin will enable the output, and applying a voltage greater than 3V will disable it. Positive logic applying a voltage larger than 3V to the CNT pin will enable the output, and applying a voltage less than 1.2V will disable it. Negative logic, device code suffix " N " . Positive logic, device code suffix nothing is the factory-preferred. If the CNT pin is left open, the converter will default to " control off " operation in negative logic, but default to " control on " in positive logic. The maximum voltage that can be applied to the CNT pin is 15V. 1000pf/1500Vdc high frequency ceramic capacitors, and L1 is a 1.5mH common mode choke. CNT -Vin +Vin C2 Fig.5 Simple Control Cy1 Cy2 C1 L1 CNT -Vin -Vin Fig.4 EMI Reduction Input Filter Fig.6 Transistor Control CNT 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. -Vin Fig.7 Isolated Control CNT -Vin Fig.8 Relay Control 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 -14www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output 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 Vin pin and one Vout 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 AV60C half-brick module does not require a connection to a chassis ground. If the module 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 TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 magnetic field radiation from common 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 this condition, the safety requirements are met and the emissions are minimized. Output Characteristics Minimum Load Requirements The AV60C half-brick series will maintain regulation and operate properly with a NO LOAD condition. However, the transient response is altered below a minimum output load condition. When the module is operating below the minimum load, the transient amplitude and recovery time are both increased when the load is stepped higher, the output ripple continues to meet the peak to peak requirements. For the AV60C half-brick series, 10% minimum load requirement is strictly in order to meet all performance specifications. Remote Sensing The AV60C half-brick converters can remotely sense both lines of its output which moves the effective output voltage regulation point from the output of the unit to the point of connection of the remote sense pins. This feature automatically adjusts the real output voltage of the series in order to compensate for voltage drops in distribution and maintain a regulated voltage at the point of load. When the converter is supporting loads far away, or is used with undersized cabling, significant voltage drop can occur at the load. The best defense against such drops is to locate the load close to the converter and to ensure adequately sized cabling is used. When this is not possible, the converter can compensate for a drop of up to 0.25V per lead, or a total of 0.5V, Asia 852-2437-9662 852-2402-4426 -15www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output +Vin +Vout CNT Sense(+) Case Trim Radj-up RLOAD Sense(-) -Vin -Vout Radj-up = Vo(100+y) 1.26y - (100+2y) y Where y is the adjusting percentage of the voltage. 0 < y < 10 Radj-up is in k. Adjustment Resistor Value (k) through use of the sense leads. When used, the + and - sense leads must be connected from the converter to the point of load as shown in Figure 9 using twisted pair wire. The converter will then regulate its output voltage at the point where the leads are connected. Care should be taken not to reverse the sense leads. If reversed, the converter will trigger OVP protection and turn off.When not used, the +Sense lead must be connected with +Vo and -Sense with -Vo. Also note that the output voltage and the remote sense voltage offset must be less than the minimum overvoltage trip point. Note that at elevated output voltages the maximum power rating of the module remains the same, and the output current capability will decrease correspondingly. 200 180 160 140 120 100 80 60 40 20 0 0 1 2 3 4 5 6 7 8 9 10 % Change In Output Voltage (y) +Vout +Sense +S Fig.10 Trim Up Circuit and Curves Twisted Pair Load -Sense -S -Vout Fig.9 Sense Connections +Vin +Vout CNT Sense(+) Case Trim RLOAD Radj-down Sense(-) -Vin -Vout TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Radj-down = 100 y -2 where y is the adjusting percentage of the voltage. 0 < y < 10 Radj-down is in k. Adjustment Resistor Value (k) Output Trimming Trimming Users can increase or decrease the output voltage set point of a module by connecting an external resistor between the TRIM pin and either the SENSE (+ ) or SENSE ( - ) pins. The trim resistor should be positioned close to the module. If not using the trim feature, 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 the corresponding configuration are shown in Figure 10 and Figure 11. 100 90 80 70 60 50 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 10 % Change In Output Voltage (y) Fig.11 Trimming Down Circuit and Curves Asia 852-2437-9662 852-2402-4426 -16www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Output Over-Voltage Over-Voltage Protection The over-voltage protection has a separate feedback loop which activates when the output voltage is between 3.9V-5V. When an over-voltage condition occurs, a " turn off " signal was sent to the input of the module, and shut off the output. The module will restart after power on again. Output Over-Current Protection AV60C half-brick series DC/DC converters feature foldback 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 12. The recommended value for C1 is 2,200F/10V and C2 and C3 is 4700pF. +Vout C2 +Vout C1 0.1F C2 Load -Vout Fig.13 Output Ripple Filter For a Distant 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 10F 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 14. 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 15. RLine C1 RLine +Vout Load -Vout Load C3 RLine Fig.12 Output Ripple Filter 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 13. The recommended component for C2 is 2200F/10V capacitor and connecting a 0.1F ceramic capacitor C1 in parallel. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 Load RLine -Vout Ground Loop RLine Fig.14 Ground Loops RLine RLine +Vout Load Load RLine -Vout RLine RLine Fig.15 Single Point Ground Asia 852-2437-9662 852-2402-4426 -17www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Parallel Power Distribution Figure 16 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 Load 2 Load 3 -Vout RG2 RG1 RG3 RL = Lead Resistance RG = Ground Lead Resistance Fig.16 Parallel Power Distribution Radial Power Distribution Radial power distribution is the preferred method of providing power to the load. Figure 17 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 RG1 Load 2 Load 3 RG2 RG3 -Vout RL = Lead Resistance RG = Ground Lead Resistance RG1 Load 2 Load 3 Load 4 RG2 RG3 -Vout RG4 RL = Lead Resistance RG = Ground Lead Resistance Fig.18 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 19 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 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 USA 1-760-930-4600 1-760-930-0698 RL4 RL2 Load 1 Fig.17 Radial Power Distribution TEL: FAX: RL3 RL1 RL3 +Vout Load 1 +Vout I3 RL2 RL1 approach minimizes the drawbacks of a parallel design when a purely radial design is not feasible. Europe 44-(0)1384-842-211 44-(0)1384-843-355 Load +Vout -Vout Fig.19 Redundant Operation Asia 852-2437-9662 852-2402-4426 -18www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Thermal Management Technologies AV60C half-brick series 50 W to 150 W modules feature high efficiency and the 3.3V output units have typical efficiency of 81% at full load. With less heat dissipation and temperatureresistant 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 20 can verify the proper cooling. Figure 20 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 in the final system configuration to verify proper TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 29.0 (1.14) 30.5 (1.2) MEASURE CASE TEMPERATURE HERE +Vin +Vout CNT +Sense Case - Sense Trim -Vin -Vout Base-plate side View Dimensions: millimeters (inches) Fig.20 Case Temperature Measurement operational due to the variation in test conditions. 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 equation 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 curve of AV60C half-brick series 3.3V output are shown as figure 21 to figure 24. Asia 852-2437-9662 852-2402-4426 -19www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Module Derating POWER DISSIPATION(W) 9 8.4 7.8 7.2 6.6 6 5.4 4.8 36V 4.2 48V 75V 3.6 3 2.4 0 1 2 3 4 5 6 7 8 9 10 OUTPUT CURRENT(A) Fig.21 AV60C-048L-033F10N Power Dissipation POWER DISSIPATION(W) 12.5 Experiment Setup From the experimental set up shown in figure 25, the derating curves as figure 26 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. 10.5 8.5 6.5 36V 48V 75V 4.5 Convection Without Without Heat Sinks Heat transfer can be enhanced by increasing the airflow over the module. Figure 26 shows the maximum power that can be dissipated by the module. 2.5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 OUTPUT CURRENT(A) 13(0.5) Fig.22 AV60C-048L-033F15N Power Dissipation POWER DISSIPATION(W) 18 PWB facing PWB 15 12 Air velocity and Ambient Temperature Testing Point Module 9 36V 48V 50.8(2.0) 75V 6 3 0 2 4 6 8 10 12 14 16 18 20 Air flow OUTPUT CURRENT(A) Fig.23 AV60C-048L-033F20N Power Dissipation Dimensions: millimeters (inches). POWER DISSIPATION(W) 25 Fig.25 Experiment Set Up 20 15 36V 48V 10 75V 5 0 3 6 9 12 15 18 21 24 27 30 OUTPUT CURRENT(A) Fig.24 AV60C-048L-033F30N Power Dissipation TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 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 26. Asia 852-2437-9662 852-2402-4426 -20www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output 35 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.) Power Dissipation PD (W) 30 25 20 15 Natural Convection (10-20 ft./min.) 10 5 0 0 10 20 30 40 50 60 70 80 90 100 PD = 21 W Determine IO (Fig.24): IO = 26 A Calculate PO: PO = (VO) x (IO) = 3.3 x 26 = 85.8 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 23. Ambient Temperature, TA (C) Fig.26. Forced Convection Power Derating without Heat Sink Example 1. How to calculate the minimum airflow required to maintain a desired Tc? If a AV60C-048L-033F30N module operates with a 48V line voltage, a 25 A output current, and a 40 C maximum ambient temperature, What is the minimum airflow necessary for the operating? Determine PD ( referenced Fig.24 ) with condition: Vin = 48 V lO = 25 A Get: PD = 19 W And with TA = 40 C Determine airflow ( Fig.26): v = 3 m/s (600 ft./min.) Heat Sink Configuration Several standard heat sinks are available for the AV60C half-brick series 50 W to 150 W modules as shown in Figure 27 to Figure 29. 57.0 (2.24) 4.9 (0.193) 11.8 (0.465) Dimensions: millimeters (inches). 89.1(3.51) Fig.27 Non Standard Heatsink WDL02540 1/4 IN. WDL05040 1/2 IN. 61 (2.4) WDL10040 1 IN. 57.9 (2.28) Dimensions: millimeters (inches). 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 AV60C-048L-033F30N operating at following conditions: Vin = 48 V v = 3.0 m/s (600 ft./min.) TA = 40 C Determine PD ( Fig.26 ) Fig.28 Longitudinal Fins Heat Sink WDT02540 1/4 IN. WDT05040 1/2 IN. 57.9 (2.28) WDT10040 1 IN. 61 (2.4) Dimensions: millimeters (inches). Fig.29 Transverse 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 Asia 852-2437-9662 852-2402-4426 -21www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output 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 rec- ommended interface methods (silicon grease or thermal pads available from Astec) can result in a case-heatsink thermal impedance around 0.1C/W. Natural Convection with Heat Sink The power derating for a module with the heat sinks ( shown as figure 27 to figure 29) in natural convection is shown in figure 31. In this test, natural convection generates airflow about 0.05 m/s to 0.1 m/s ( 10ft./min to 20ft./min ). Figure 31 can be used for heat-sink selection in natural convection environment. 30 Power dissipation PD (W) 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 29) 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. 1 in. heat sink 25 1/2 in. heat sink 20 1/4 in. heat sink 15 NO heat sink 10 5 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperature, TA (C) Fig.31 Heat Sink Power Derating Curves, Natural Convection Example 3. How to select a heat sink? What heat sink would be appropriate for a AV60C-048L-033F30N in a natural convection environment at nominal line, 3/4 load, and maximum ambient temperature of 40C? Determine PD ( referenced Fig.24) with condi- Fig.30 Heat Sink Mounting TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 tion: Vin = 48 V IO = 3/4 (30) = 23 A TA = 40 C Get: PD = 18 W Determine Heat Sink (Fig.31.): 1 in. allows up to TA = 48 C Asia 852-2437-9662 852-2402-4426 -22www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output 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 32. 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. BMPM Thermal Resistance BMPM PD Fig.32 Basic Thermal Resistance Model For AV60C half-brick series 50W to 150W 3.3V output converters, the module's thermal resistance values versus air velocity have been determined experimentally and shown in figure 33. The highest values on each curve represents the point of natural convection. Figure 33 is used for determining thermal performance under various conditions of airflow and heat sink configurations. TEL: FAX: USA 1-760-930-4600 1-760-930-0698 Europe 44-(0)1384-842-211 44-(0)1384-843-355 8 Case-Ambient Thermal Resistance R CA (C/W) 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 module thermal resistance. TC, max is the maximum case temperature 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.33 Case-to-Ambient Thermal Resistance Curves; Either Orientation 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 AV60C half-brick 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 AV60C-048L-050F30N heat sink combinations at desired Tc of 80 C? The working condition is as following: VI = 48 V, IO = 25 A, TA = 40 C Determine PD ( Fig.24 ) PD = 19 W Then solve RCA: RCA = TC, max / PD RCA = (TC - TA) / PD RCA = (80 - 40) / 19 = 2C/W Determine air velocity from figure 33: If no heat sink: v > 3.0 m/s (600 ft./min.) If 1/4 in. heat sink: v = 3.0 m/s (600 ft./min.) If 1/2 in. heat sink: v = 2.0 m/s (400 ft./min.) If 1 in. heat sink: v = 1.2 m/s (240 ft./min.) Asia 852-2437-9662 852-2402-4426 -23www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Example 5. How to determine case temperature ( Tc ) for the various heat sink configurations at certain air velocity? What is the allowable Tc for AV60C-048L033F30N heat sink configurations at desired air velocity of 2.0 m/s, and it is operating at a 48 V line voltage, a 25 A output current, a 40 C maximum ambient temperature? Determine PD ( Fig.24 ) with condition: Vin = 48 V IO = 25 A TA = 40 C v = 2.0 m/s (400 ft./min.) Get: PD = 19 W Determine TC: TC = (RCA x PD) + TA Determine the corresponding thermal resistances ( RCA ) from Figure 33: No heat sink: RCA = 3.8 C/W TC = (3.8 x 19) + 40 = 112 C 1/4 in. heat sink: RCA = 2.8 C/W TC = (2.8 x 19) + 40 = 93 C 1/2 in. heat sink: RCA = 2.0 C/W TC = (2.0 x 19) + 40 = 78 C 1 in. heat sink: RCA = 1.2 C/W TC = (1.2 x 19) + 40 = 63 C In this configuration, the heat sink would have to be at least 1/4 in. high so that the power module does not exceed the maximum case temperature of 100 C. AV60C Half-brick Series other system equipment cooler and increase component life spans. Soldering AV60C half-brick 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 2,000,000 hours. Obtaining this MTBF in practice is entirely possible. If the ambient air temperature is expected to exceed +25C, then we also advise a heatsink on the AV60C half-brick converter, 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. Mechanical Considerations Installation Although AV60C half-brick 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 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 -24www.astec.com AV 6 0 C S e r i e s 3 . 3 V 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 36 VDC to 75 VDC Input, 50-150W Output Recommend Hole Pattern Base-plate side view Dimensions are in millimeters and (inches). 57.9 (2.28) Max 4.8 (0.19) 48.3 (1.90) +Vin 35.56 (1.400) 50.8 (2.00) 48.26 (1.900) +Vout 35.56 (1.400) +Sense CNT 25.40 (1.000) Trim 25.40 (1.000) 10.16 (0.400) 17.78 10.16 (0.700) (0.400) -Sense Case 61.0 (2.40) Max -Vout -Vin 5.1 (0.20) 12.7 (0.50) Mounting Inserts Module Outline Mechanical Chart 5.1 (0.2) 61.0 (2.4) 7.62 (0.3) +Vin +Vout CNT +Sense 10.16 (0.4) 10.16 (0.4) 7.62 (0.3) 15.24 (0.6) Trim 7.62 (0.3) Case -Sense -Vin -Vout 10.16 (0.4) 10.16 (0.4) Mounting Inserts M3 thru hole x4 4.8 (0.19) 48.26 (1.9) mm (inches) 57.9 (2.28) Length optional 4.8 (0.189) default 12.7 (0.5) 7- 1.0 (0.04) all pins except +Vo and -Vo Pin Length Option 4.80mm ! 0.5mm 0.189in. ! 0.020in. 3.80mm ! 0.25mm 0.150in. ! 0.010in. 5.80mm ! 0.5mm 0.228in. ! 0.02in. 2.80mm ! 0.25mm 0.110in. ! 0.010in. 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 none (default) -6 -7 -8 2- 2.0 (0.08) only +Vo and -Vo Tolerances: Inches .xx !0.020 .xxx !0.010 Pins >4mm <4mm Millimeters .x !0.5 .xx !0.25 !0.02inch ( !0.5mm) !0.01inch ( !0.25mm) Base-plate side view Asia 852-2437-9662 852-2402-4426 -25www.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