AIF25R48 Series Technical Reference Note AIF25R48 Series Isolated DC/DC Converter Module 36-75V Input, 28V single Output Features Industry Standard Size: 4.6”X 2.4’’ 0.5’’package Options • • • • • • • • • 4.6’’ X 2.4’’ X 0.5’’ full brick package Basic insulation High efficiency High power density Current sharing function 2:1 wide input range of 36-75V CNT (input side and output side) function Trim function • • • • • • AUX/IOG/TMP signal output Over- temperature protection Input under-voltage protection Output short circuit protection Output over-voltage protection Wide operating case temperature range Sense function Choice of positive logic or negative logic for CNT function Choice of short pins or long pins Description The AIF25R48 series is a new Aluminum baseplate full brick DC-DC converter. The AIF25R48 series uses an industry standard package size: 116.8mm X 61mm X 12.7mm (4.6”x2.4”x0.5”), provides CNT, current sharing, trim, sense, and IOG/TMP functions. AIF25R48 series comes in 48V input versions, each of which uses a 2:1 input range of 36~75V. It can provide 28V@25A single output, which is isolated from input. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 1 / 29 AIF25R48 Series Technical Reference Note Contents Options ................................................................................................................................................................. 1 Description............................................................................................................................................................ 1 Electrical Specifications ............................................................................................................................................ 4 Input Specifications ............................................................................................................................................... 4 Absolute Maximum Ratings .................................................................................................................................. 5 Output Specifications ............................................................................................................................................ 6 Output Specifications (Cont).................................................................................................................................. 7 Feature Specifications............................................................................................................................................ 8 Characteristic Curves ................................................................................................................................................ 9 Performance Curves – Efficiency........................................................................................................................... 9 Performance Curves – Output Performance Curves................................................................................................ 9 Performance Curves – Transient Response........................................................................................................... 10 Performance Curves – Transient Response (Cont)................................................................................................ 10 Performance Curves – Startup Characteristics ...................................................................................................... 11 Performance Curves – Startup from CNT1 Control .............................................................................................. 11 Feature Description ................................................................................................................................................. 12 CNT Function ..................................................................................................................................................... 12 Trim .................................................................................................................................................................... 13 Minimum Load Requirement ............................................................................................................................... 14 Output Over-Current and Short Protection ........................................................................................................... 14 Output Over-Voltage Protection ........................................................................................................................... 14 Over Temperature Protection ............................................................................................................................... 14 Current Sharing ................................................................................................................................................... 15 Sense................................................................................................................................................................... 16 AUX/IOG/TMP................................................................................................................................................... 18 Output Filter........................................................................................................................................................ 18 Decoupling.......................................................................................................................................................... 19 Ground Loops ..................................................................................................................................................... 19 Design Consideration .............................................................................................................................................. 21 Typical Application ............................................................................................................................................. 21 Fusing ................................................................................................................................................................. 21 Input Reverse Voltage Protection ......................................................................................................................... 21 DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 2 / 29 AIF25R48 Series Technical Reference Note EMC ................................................................................................................................................................... 22 Safety Consideration............................................................................................................................................ 23 Thermal Management.............................................................................................................................................. 24 Technologies ....................................................................................................................................................... 24 Basic Thermal Management ................................................................................................................................ 24 Module Derating with Heatsink ........................................................................................................................... 25 Module Derating without Heatsink ...................................................................................................................... 26 MTBF..................................................................................................................................................................... 26 Mechanical Considerations...................................................................................................................................... 27 Installation .......................................................................................................................................................... 27 Soldering............................................................................................................................................................. 27 Mechanical Chart (pin side view)......................................................................................................................... 28 Ordering Information .............................................................................................................................................. 29 Model Numbering ................................................................................................................................................... 29 DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 3 / 29 AIF25R48 Series Technical Reference Note Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage and temperature conditions. Standard test condition on a single unit with a heatsink of 270mm 220mm 43mm is as following: Tc(case): 25°C +Vin: 48V 2% −Vin: Return pin for +Vin CNT1: Connect to -Vin +Vout: Connect to load −Vout: Connect to load (return) +Sense: Connect to +Vout -Sense: Connect to -Vout VB, Trim(Vadj): Open CNT2, CNT3: Open CB: Open IOG, TMP: Open AUX: Open Input Specifications Parameter Device Symbol Min Typ Max Unit Operating Input Voltage All VI 36 48 75 VDC Maximum Input Current All Ii,max - - 23 A All Ii - - 160 mAp-p All - - - 7 W (Vi = 0 to Vi,max, Io = Io,max) Input Reflected-ripple Current (Vi = Vi,nom , 5Hz to 20MHz: 12uH source impedance: Tc = 25 ºC.) No Load Input Power (Vi = Vi,nom ) CAUTION: This power module is not internally fused. An input line fuse must always be used. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 4 / 29 AIF25R48 Series Technical Reference Note Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device in not implied at these or any other conditions in excess of those given in the operational sections of the IPS. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Device Symbol Min Typ Max Unit Input Voltage: Continuous: Transient (100ms) All All Vi VI, trans 0 0 - 80 100 Vdc Vdc Highest voltage to CNT1 All - - - 15 Vdc Operating Ambient Temperature All Ta -20 55 ºC Operating Case Temperature (with a heatsink) All Tc - - 100 ºC Storage Temperature All TSTG -55 - 125 ºC Operating Humidity All - - - 85 % All - - - 1500 1500 500 Vdc Vdc Vdc All Po,max - - 700 W I/O Isolation (Conditions : 50µA for 5 sec, slew rate of 1500V/10sec) Input-Output Input-Case Output-Case Output Power DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 5 / 29 AIF25R48 Series Technical Reference Note Output Specifications Parameter Device Symbol Min Typ Max Unit Output Ripple and Noise All - - 100 200 mVp-p External Load Capacitance All - 470 1000 6800 µF Output Voltage Setpoint (Vi = Vinom: Io =18A; Tc = 25 ºC ) Output Regulation: All Vo,set 27.5 28 28.5 Vdc Line (Vi,min to Vi,max) All - - 0.01 0.2 % Load(Io = Io,min to Io,max) All - - 0.1 0.5 % Temperature All - - - 0.02 %Vo/ºC Rated Output Current All Io 2.5 - 25 A Output Current-limit Inception All Io 26.25 - 35 A (RMS) 86 89 - % (Across 1µF @50V, X7R ceramic capacitor & 1000µF @50V LOW ESR Aluminum capacitor) Peak-to-Peak (5 Hz to 20 MHz) (when unit is shut down) Efficiency All (Vi = Vi,nom ; Io,nom ; Tc= 25°C) Switching Frequency DATE: May 28, 2003 All - MODEL : AIF25R48 SERIES 340 KHz S 6 / 29 AIF25R48 Series Technical Reference Note Output Specifications (Cont) Parameter Device Symbol Min Typ Max Unit All - - - 3 500 %Vo,nom µsec All - - - 3 500 %Vo,nom µsec All - - - 200 msec All - - - 5 %Vo,nom Dynamic Response : (∆Io/∆t = 1A/10µs ) Load Change from Io = 50% to 75% of Io,nom : Peak Deviation Settling Time (to Vo,nom) Load Change from Io = 50% to 25% of Io,nom : Peak Deviation Settling Time (to Vo,nom) Turn-On Time (Io = Io,nom ; Vo within 1%) Output Voltage Overshoot (Io = Io,nom ; TA = 25°C) DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 7 / 29 AIF25R48 Series Technical Reference Note Feature Specifications Parameter CNT1 pin voltage : Logic Low Logic High Enable pin current : Logic Low Device Symbol Min Typ Max Unit All All -0.7 3.5 - 1 7 V V All - - 1 mA Output Voltage Adjustment Range Output Over-voltage All - 80 - 110 %Vo,nom ALL - 32.2 - 39.2 V Over Temperature protect All T 101 Turn-on Point Turn-off Point All All - 31 30 Current Sharing Accuracy All - +SENSE All - 1 %Vo,nom -SENSE All - 1 %Vo,nom AUX All - 13 16 V IOG All - 5 V TMP All - 5 V Isolation Capacitance All - - 1600 - PF Isolation Resistance All - 10 - - MΩ Calculated MTBF All - - 1,500, 000 - Hours All - - 150 - g 120 Under-Voltage Lockout (Io = Io,nom ; TA = 25°C) Weight DATE: May 28, 2003 MODEL : AIF25R48 SERIES 34 33 36 35 3 10 V V S 8 / 29 AIF25R48 Series Technical Reference Note Characteristic Curves Performance Curve – Efficiency Efficiency(%) 95 85 Vin=36V Vin=48V 75 Vin=75V 65 55 0 5 10 15 20 25 Output Current(A) Typical Efficiency Curve Performance Curves – Output Performance Curve Output Voltage(V) 30 25 20 Vin=36V 15 Vin=48V Vin=75V 10 5 0 0 10 20 30 40 Output Current(A) Output Performance Curve DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 9 / 29 AIF25R48 Series Technical Reference Note Performance Curves – Transient Response 50%-25%Ioman load change Performance Curves – Transient Response (Cont) 25%-50%Ioman load change DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 10 / 29 AIF25R48 Series Technical Reference Note Performance Curves – Startup Characteristics Start-up from Power On Performance Curves – Startup from CNT1 Control Start-up from CNT1 On DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 11 / 29 AIF25R48 Series Technical Reference Note Feature Description CNT Function CNT function is available on both side of input (CNT1) and output (CNT2/CNT3). Input side CNT(CNT1) Function Two CNT1 logic options are available. The CNT1 logic, CNT1 voltage and the module working state are as the following Table 1.The ground pin of CNT1 is “-Vin” pin. And CNT2/CNT3 must be open when CNT1 is used. L H OPEN N ON OFF OFF P OFF ON ON Table 1 N--- means “Negative Logic”, P--- means “Positive Logic” L--- means “Low Logic Voltage”, -0.7V L 1V H--- means “High Logic Voltage”, 3.5V H 7V ON--- means “Module is on”, OFF--- means “Module is off” Open--- means “CNT1 pin is left open “ Note: Normally, VCNT1 8V, but when CNT1 is left open, VCNT may reach to 15V. The following Figure shows a few simple CNT1 circuits. Fig.1 A few simple CNT1 Circuits DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 12 / 29 AIF25R48 Series Technical Reference Note Output Side CNT (CNT2/CNT3) Function Two CNT2/CNT3 logic options are available. CNT2/CNT3 can be used as shown in Fig2 with a “Negative Logic” module. The switch is opposite with a “Positive Logic” module. CNT1 must be connected to -Vin when CNT2/CNT3 is used. And make sure that sink current of output side CNT circuit should be less than 12mA. Fig.2 Output Side CNT (CNT2/CNT3) Function for “Negative Logic” Module Trim The output voltage of the AIF25R48 series can be trimmed using the trim pin provided. Applying a resistor to the trim pin through a voltage divider from the VB will cause the output to increase 10% or decrease 20%. Trimming up by more than 10% of the nominal output may activate the OVP circuit or damage the converter. Trimming down more than 20% can cause the converter to regulate improperly. If the trim pin is not needed, it should be left open. Fig.3 Trim Up Circuit and Formula DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 13 / 29 AIF25R48 Series Technical Reference Note Fig.4 Trim Down Circuit and Formula Minimum Load Requirement The minimum load of AIF25R48 series is 2.5A. Output Over-Current and Short Protection AIF25R48 series DC/DC converters feature foldback current limiting as part of their Over-current Protection (OCP) circuits. When output current exceeds 110 to 140% of rated current, such as during a short circuit condition, the module will work on intermittent mode, also can tolerate short circuit conditions indefinitely. When the over-current condition is removed, the converter will automatically restart. A sound may occur from module when the output is shorted. Output Over-Voltage Protection The over-voltage protection has a separate feedback loop, which activates when the output voltage exceeds 120% to 140% of the nominal output voltage. The module can restart by turning on the power or turning on the CNT (CNT1 or CNT2/CNT3) signal again. Over Temperature Protection AIF25R48 series DC/DC converters will shut down when the temperature of the baseplate reaches 101 to 120 , and the module will automatically restart if the temperature of the baseplate is under 100 . The measurement point is indicated in below Fig 5. The module must be mounted on a heatsink of 270mm 220mm 43mm when measuring OTP point. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 14 / 29 AIF25R48 Series Technical Reference Note The OTP point is about 85 without a heatsink. Fig.5 Measuring OTP Point of AIF25R48 series Current Sharing Parallel operation is available by connecting the modules as shown in Fig 6. As variance of output current drew from each power supply is 10% maximum, the total output current must not exceed the value determined by the following equation. (Output current in parallel operation)=(the rated current per module)*(number of module)*0.9 In parallel operation, the maximum operative number of modules is 7. When output voltage adjustment is not used. TRM, VB open, R1, R2, VR1, Rva, Rvb, Rta, Rtb… are not needed. Thick wire should be used for wiring between the power supply and load, and line drop should be less than 0.3V. Connect the sensing line and the power line by one point after connecting each power supply’s sense pins (+Sense, -Sense). DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 15 / 29 AIF25R48 Series Technical Reference Note +VOUT +SENSE VB TRM CB -SENSE -VOUT Rva Rta Csa Co1a Co2a LOAD VR1 +VOUT +SENSE VB TRM CB -SENSE -VOUT +VOUT +SENSE VB TRM CB -SENSE -VOUT Rvb Rtb Csb Rvc Rtc Csc Co1b Co2b Co1c Co2c . . . Fig.6 Parallel operation Rva, Rvb,…..: 470 Rta, Rtb,…: 22K Vr1 10K Csa,Csb,…: 0.1 F Sense Sense terminal is provided to compensate for voltage drop across the load wire. When sense function is not used, short +sense terminal to +Vout terminal and, -sense terminal to –Vout terminal. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 16 / 29 AIF25R48 Series Technical Reference Note When sense function is used, it should pay attention to that voltage compensation range for line drop must be less than 1%Vo. Using shield wire, twist pair, or parallel pattern to reduce noise effect. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 17 / 29 AIF25R48 Series Technical Reference Note AUX/IOG/TMP AUX AUX is built in to operate the output side CNT(CNT2/CNT3). If AUX is not used for CNT2/CNT3, AUX can be used for IOG or TMP signal output by opto coupler. Short protection resistance(2.7k ) is built in. AUX voltage at open circuit is 13Vtpy, 16Vmax. IOG IOG signal turns “H” from “L” within 1 second when the output of the module is shut down. The specification of IOG is shown in table 2. TMP TMP signal turns “L” from “H” within 1 second when over temperature is detected. The specification of TMP is shown in Table 2. item Function Base pin Level voltage “L” Level voltage “H” Maximum sink current Maximum applicable voltage TMP IOG Normal operation ”H” Normal operation ”L” Over temperature “L” Malfunction “H” -Sense 0.5Vmax at 5mA 5V typ 10mA max 35V max Table 2 The specification of IOG and TMP Output Filter 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 C1 across the output as shown in Figure ‘Output Ripple Filter’. The recommended value for the output capacitor C1 is 1000µF. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 18 / 29 AIF25R48 Series Technical Reference Note Fig.7 Output Ripple Filter 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, with a 0.47F ceramic capacitor C2 in parallel generally as shown in Figure ‘Output Ripple Filter for a Distant Load’. Fig.8 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 or ceramic 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 ‘Ground Loops’. 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 ‘Single Point Ground’. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 19 / 29 AIF25R48 Series Technical Reference Note Fig.9 Ground Loops DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 20 / 29 AIF25R48 Series Technical Reference Note Design Consideration Typical Application F1 +VIN +VOUT +SENSE Vin Cin CNT1 TRM S1 Co1 Co2 LOAD -SENSE -VIN -VOUT Fig.10 typical application F1: 30A Cin: Recommended 470 F/100V low ESR Aluminum capacitor. Co1: Recommended 1 F/50V film capacitor. Co2: Recommended 1000 F/50V low ESR Aluminum capacitor. Fusing The AIF25R48 series 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 AIF25R48 series are 30A. Input Reverse 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 ‘Reverse Polarity Protection Circuit’. In both cases the diode used is rated for 40A/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. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 21 / 29 AIF25R48 Series Technical Reference Note Fig 11 Reverse Polarity Protection Circuit EMC For conditions where EMI is a concern, a different input filter can be used. Fig 12 ‘EMI Reduction Filter‘ shows a filter designed to reduce EMI effects. AIF25R48 SERIES can meet EN55022 CLASS A with Fig 12. Vin+ Vout+ +Sense +Vin C1 +Vout C5 C3 L1 L3 C7 + C2 C8 L2 + AIF25R48 AVF700 SERIES + C10 C11 C12 C9 C6 -Vin -Vout Vin- Vout-Sense CASE Fig.12 EMI Reduction Filter L1, L2: 3.25mH L3: 110 H C3, C7: 470 F/100V low ESR Aluminum capacitor. C10: 1000 F/50V low ESR Aluminum capacitor. C1, C2: 2.2 F/250V C5, C6: 0.15 F/250V C8, C9: 4.7Nf/1000V C11, C12: 1 F/50V DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 22 / 29 AIF25R48 Series Technical Reference Note 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 AIF25R48 SERIES input-to-output isolation is an basic 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. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 23 / 29 AIF25R48 Series Technical Reference Note Thermal Management Technologies AIF25R48 series module has typical efficiency of 89% at full load. With less heat dissipation and temperature-resistant components such as ceramic capacitors, the module exhibit good behavior during pro-longed 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 5 can verify the proper cooling. The module should work under 55°C ambient 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. Note that Tc of module must always be checked in the final system configuration to verify proper 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 ÄPo 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- ) / DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 24 / 29 AIF25R48 Series Technical Reference Note 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 AIF25R48 SERIES is shown as Fig.13. Power Dissipation 120 100 80 Vin=36V 60 Vin=48V 40 Vin=75V 20 0 0 5 10 15 20 25 Output Current(A) Fig.13 Typical Power Dissipation Curve of AIF25R48 series Module Derating with Heatsink Usually a customized heatsink is used for AIF25R48 SERIES because the power dissipation of AIF25R48 series is too large. A heatsink of full brick size can not consume so much heat. A derating curve is shown in Fig14 with a heatsink of 270mm 220mm 43mm size. The module will have different derating curves with different heatsink designed by customer. Fig.14 Temperature Derating Curve with Heatsink DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 25 / 29 AIF25R48 Series Technical Reference Note Module Derating without Heatsink The derating curves of AIF25R48 series without heatsink are shown in the following Fig15. We recommend that the customer use the AIF25R48 SERIES with proper heatsink for the better operation. Fig.15 Temperature Derating Curve without Heatsink MTBF The MTBF, calculated in accordance with Bellcore TR-NWT-000332 is 1,500,000 hours. Obtaining this MTBF in practice is entirely possible. If the case temperature is expected to exceed +25 , then we also advise an 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. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 26 / 29 AIF25R48 Series Technical Reference Note Mechanical Considerations Installation Although AIF25R48 series converters can be mounted in any orientation, free air-flowing must be taken. Normally power components are always put at the end of the airflow path or have the separate airflow paths. This can keep other system equipment cooler and increase component life spans. Soldering AIF25R48 series converters are compatible with standard wave soldering techniques. When wave soldering, the converter pins should be preheated for 20-30 seconds at 110 , and wave soldered at 260 for less than 10 seconds. When hand soldering, the iron temperature should be maintained at 425 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. DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 27 / 29 AIF25R48 Series Technical Reference Note Mechanical Chart (pin side view) *: Pin length Default: 4.8mm 0.5mm ( 0.189in. 0.02in.) Product name with suffix “-6”: 3.8mm 0.25mm ( 0.15in. 0.01in.) Product name with suffix “-7”: 5.8mm 0.5mm ( 0.228in. 0.02in.) Product name with suffix “-8”: 2.8mm 0.25mm ( 0.11in. 0.01in.) DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 28 / 29 AIF25R48 Series Technical Reference Note Ordering Information Model Number AIF25R48 Input Voltage Output Output Ripple Noise Efficiency (V) Voltage Current (mV PP) (mV pp) % (V) (A) typ. typ. typ. 28 25 160 200 89 36-75 SERIES Model Numbering DATE: May 28, 2003 MODEL : AIF25R48 SERIES S 29 / 29