PD - 94550A ATR28XXD SERIES 28V Input, Dual Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER Description The ATR28XXD Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to MIL-STD-704D input requirements, these devices have nominal 28VDC inputs with ±12V and ±15V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated single forward topology operating in the feed-forward mode at a nominal switching frequency of 550KHz. Input to output isolation is achieved through the use of transformers in the forward and feedback circuits. The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability and radiation tolerance than devices incorporating optical feedback circuits. Three standard temperature grades are offered with screening options. Refer to Part Number section. They can be provided in a standard plug-in package for PC mounting or in a flanged package for more severe environments. ATR Features Manufactured in a facility fully qualified to MIL-PRF- 38534, these converters are fabricated utilizing DSCC qualified processes. For available screening options, refer to device screening table in the data sheet. Variations in electrical, mechanical and screening can be accommodated. 16V to 40VDC Input Range (28VDC Nominal) ±12V and ±15V Outputs Available Indefinite Short Circuit and Overload Protection 3 35W/in Power Density 30W Output Power Fast Loop Response for Superior Transient Characteristics Operating Temperature Range from -55°C to +125°C Popular Industry Standard Pin-Out Resistance Seam Welded Case for Superior Long Term Hermeticity Ceramic Feed-thru Pins External Synchronization High Efficiency Shutdown from External Signal Military Screening Standard Microcircuit Drawings Available Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact IR Santa Clara with specific requirements. www.irf.com 1 01/12/07 ATR28XXD Series Specifications TCASE = -55°C to +85°C, VIN = +28V ± 5% unless otherwise specified Absolute Maximum Ratings Input voltage Power Output Soldering temperature -0.5V to +50VDC Internally limited, 36W typical 300°C for 10 seconds Recommended Operating temperature Maximum Operating temperature Storage case temperature Temperature Range 1 PARAMETER STATIC CHARACTERISTICS OUTPUT Voltage Current 5 Ripple Accuracy Power1 REGULATION Line Load CROSS REGULATION6 INPUT Voltage Range Current Ripple Current EFFICIENCY ISOLATION CAPACITIVE LOAD Load Fault Power Dissipation Switching Frequency SYNC Frequency Range 7 DYNAMIC CHARACTERISTICS Step Load Changes Output Transient Recovery 2 Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery Condition -55°C ≤ TC ≤ +85°C, VIN = 28 V DC ±5%, CL=0, unless otherwise specified VIN = 16 to 40 V DC IOUT = 0 to Full Load Full Load, 20KHz to 2MHz T CASE = 25°C, Full Load ATR2815D ATR2812D Min Typ Max Min Typ Max Units ±11.76 0.0 ±12 ±12.24 ±1.25 85 ±12.12 ±14.70 0.0 ±15 ±15.30 ±1.0 85 ±15.15 VDC ADC mV p-p VDC W 75 150 ±5 mV mV % 40 75 18 50 ±11.88 30 40 ±12 V IN = 16 to 40 V DC IOUT = 0 to Full Load V IN = 16, 28, and 40 VDC ±14.85 30 40 ±15.00 75 120 ±5 16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25°C Input to output @500 V DC No effect on performance T C = +25°C (total for both outputs) Short Circuit Overload, T C = +25°C IOUT = Full Load -55°C to +85°C -55°C to +115°C -65°C to +135°C 28 25 82 100 100 VDC mA DC mA DC mA p-p % MΩ µF 9.0 14 600 700 9.0 14 600 700 W W KHz KHz 40 75 18 50 100 16 28 25 82 100 500 500 500 500 50% Load to 100% Load No Load to 50% Load ±100 ±250 ±100 ±250 mVpk mVpk 50% Load to 100% Load No Load to 50% Load 50% Load to No Load 25 500 3.0 25 500 3.0 µs µs ms Input step Input step Input step Input step ±180 -600 5.0 5.0 ±180 -600 5.0 5.0 mVpk mVpk ms ms 16 40 16 40 to to to to 40 16 40 16 V DC V DC V DC V DC V IN = 16 to 40 V DC IOUT = O and Full Load V IN = 16 to 40 V DC 0.0 14 14 600 25 25 0.0 14 14 600 25 25 mVpk ms ms Notes to Specifications 1. 2. 3. 4. 5. 6. 7. Above +85°C case temperature, derate output power linearly to 0 at +115°C case. Recovery time is measured from the initiation of the input transient to where VOUT has returned to within ±1% of V OUT at 50% load. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin. Load current split equally between +VOUT and –VOUT . Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W. 3W load on output under test, 3W to 27W on other output. Sync. Input signal: VIL = -0.5V Min, 0.8V Max and V IN = 2.5V Min, 11.5V Max for 10% to 90% duty cycle. 2 www.irf.com ATR28XXD Series Specifications TCASE = -55°C to +125°C, VIN = +28V ± 5% unless otherwise specified A bso lu te M axim u m R ating s Input voltage P ow er O utput S oldering tem perature -0.5V to +50V DC Internally lim ited, 36W typical 300°C for 10 seconds Recom m ended O perating tem perature M axim um Operating tem perature Storage case tem perature T em perature R ange 1 PARAMETER STATIC CHARACTERISTICS OUTPUT Voltage Current 5 Ripple Accuracy Power1 REGULATION Line Load CROSS REGULATION 6 INPUT Voltage Range Current Ripple Current EFFICIENCY ISOLATION CAPACITIVE LOAD Load Fault Power Dissipation Switching Frequency SYNC Frequency Range 7 DYNAMIC CHARACTERISTICS Step Load Changes Output Transient Recovery 2 Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery Condition -55°C ≤ TC ≤ +125°C, V IN = 28 VDC ±5%, CL=0, unless otherwise specified VIN = 16 to 40 V DC IOUT = 0 to Full Load Full Load, 20KHz to 2MHz TCASE = 25°C, Full Load ATR2812D/ES ATR2815D/ES Min Typ Max Min Typ Max Units ±11.76 0.0 ±12 ±12.24 ±1.25 85 ±12.12 ±14.70 0.0 ±15 ±15 ±1.0 85 ±15.15 V DC A DC mV p-p V DC W ±11.88 30 40 ±12.00 ±14.85 30 40 ±15.00 75 120 ±5 VIN = 16 to 40 V DC IOUT = 0 to Full Load VIN = 16, 28, and 40 V DC 16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25°C Input to output @500 V DC No effect on performance TC = +25°C (total for both outputs) Short Circuit Overload, TC = +25°C IOUT = Full Load -55°C to +125°C -55°C to +135°C -65°C to +135°C 80 100 28 25 82 40 75 18 50 75 150 ±5 16 79 100 28 25 82 100 9.0 14 600 700 500 500 500 500 40 75 18 50 mV mV % 100 V DC mA DC mA DC mA p-p % MΩ µF 9.0 14 600 700 W W KHz KHz 50% Load to 100% Load No Load to 50% Load ±100 ±250 ±100 ±250 mVpk mVpk 50% Load to 100% Load No Load to 50% Load 50% Load to No Load 25 500 3.0 25 500 3.0 µs µs ms ±180 -600 5.0 5.0 ±180 -600 5.0 5.0 mVpk mVpk ms ms Input Input Input Input step step step step 16 40 16 40 to to to to 40 16 40 16 V DC V DC V DC V DC VIN = 16 to 40 V DC IOUT = O to Full Load VIN = 16 to 40 V DC 0.0 14 14 600 25 25 0.0 14 14 600 25 25 mVpk ms ms Notes to Specifications 1. 2. 3. 4. 5. 6. 7. Above +125°C case temperature, derate output power linearly to 0 at +135°C case. Recovery time is measured from the initiation of the input transient to where V OUT has returned to within ±1% of VOUT at 50% load. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin. Load current split equally between +V OUT and –VOUT. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W. 3W load on output under test, 3W to 27W on other output. Sync. Input signal: V IL = -0.5V Min, 0.8V Max and V IN = 2.5V Min, 11.5V Max for 10% to 90% duty cycle. www.irf.com 3 ATR28XXD Series Specifications TCASE = -55°C to +125°C, VIN = +28V ± 5% unless otherwise specified Absolute Maximum Ratings Input voltage Power Output Soldering temperature -0.5V to +50VDC Internally limited, 36W typical 300°C for 10 seconds Recommended Operating temperature Maximum Operating temperature Storage case temperature Temperature Range1 PARAMETER STATIC CHARACTERISTICS OUTPUT Voltage Current 5 Ripple Accuracy Power1 REGULATION Line 4 Load4 CROSS REGULATION 6 INPUT Voltage Range Current Ripple Current EFFICIENCY ISOLATION CAPACITIVE LOAD Load Fault Power Dissipation Switching Frequency SYNC Frequency Range 7 DYNAMIC CHARACTERISTICS Step Load Changes Output4 Transient Recovery 2 Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery Condition -55°C ≤ TC ≤ +125°C, VIN = 28 V DC ±5%, CL=0, unless otherwise specified V IN = 16 to 40 VDC I OUT = 0 to Full Load Full Load, 20KHz to 2MHz T CASE = 25°C, Full Load ATR2812D/HB ATR2815D/HB Min Typ Max Min Typ Max Units ±11.76 0.0 ±12.00 ±12.24 ±1.25 85 ±12.12 ±14.70 0.0 ±15 ±15.30 ±1.0 85 ±15.15 VDC ADC mV p-p VDC W ±11.88 30 40 ±12.00 V IN = 16 to 40 VDC I OUT = 0 to Full Load V IN = 16, 28, and 40 V DC ±14.85 30 40 ±15.00 75 120 ±5 16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25°C Input to output @500 V DC No effect on performance T C = +25°C (total for both outputs) Short Circuit Overload, T C = +25°C I OUT = Full Load -55°C to +125°C -55°C to +135°C -65°C to +135°C 80 100 28 25 82 500 500 40 75 18 50 75 150 ±5 16 28 18 40 75 18 50 mV mV % 100 100 VDC mADC mADC mA p-p % MΩ µF 9.0 14 600 700 9.0 14 600 700 W W KHz KHz 79 100 25 82 500 500 50% Load to 100% Load No Load to 50% Load ±100 ±250 ±450 ±760 ±100 ±250 ±450 ±750 mVpk mVpk 50% Load to 100% Load No Load to 50% Load 50% Load to No Load 25 500 3.0 70 1500 5.0 25 500 3.0 70 1500 5.0 µs µs ms ±180 -600 5.0 5.0 1200 -1500 10 10 ±180 -600 5.0 5.0 1500 -1500 10 10 mVpk mVpk ms ms 0.0 14 14 600 25 25 0.0 14 14 600 25 25 mVpk ms ms Input step Input step Input step Input step 16 40 16 40 to to to to 40 V DC 16 V DC 40 V DC 16 V DC V IN = 16 to 40 VDC I OUT = O to Full Load V IN = 16 to 40 VDC Notes to Specifications 1. 2. 3. 4. 5. 6. 7. Above +125°C case temperature, derate output power linearly to 0 at +135°C case. Recovery time is measured from the initiation of the input transient to where VOUT has returned to within ±1% of VOUT at 50% load. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin. Load current split equally between +V OUT and –VOUT. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W. 3W load on output under test, 3W to 27W on other output. Sync. Input signal: VIL = -0.5V Min, 0.8V Max and V IN = 2.5V Min, 11.5V Max for 10% to 90% duty cycle. 4 www.irf.com ATR28XXD Series Specifications TCASE = -55°C to +125°C, VIN = +28V ± 5% unless otherwise specified Absolute Maximum Ratings Input voltage Power Output Soldering temperature -0.5V to +50VDC Internally limited, 36W typical 300°C for 10 seconds Recommended Operating temperature Maximum Operating temperature Storage case temperature Temperature Range 1 PARAMETER STATIC CHARACTERISTICS OUTPUT Voltage Current 5 Ripple Accuracy Power1 REGULATION Line4 Load 4 CROSS REGULATION6 INPUT Voltage Range Current Ripple Current EFFICIENCY ISOLATION CAPACITIVE LOAD Load Fault Power Dissipation Switching Frequency SYNC Frequency Range 7 DYNAMIC CHARACTERISTICS Step Load Changes Output 4 Transient Recovery 2 Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery Condition -55°C ≤ TC ≤ +125°C, VIN = 28 V DC ±5%, CL=0, unless otherwise specified VIN = 16 to 40 V DC IOUT = 0 to Full Load Full Load, 20KHz to 2MHz TCASE = 25°C, Full Load ATR2812D/CH ATR2815D/CH Min Typ Max Min Typ Max Units ±11.76 0.0 ±12.00 ±12.24 ±1.25 85 ±12.12 ±14.70 0.0 ±15 ±15.30 ±1.0 85 ±15.15 VDC ADC mV p-p VDC W ±11.88 30 40 ±12.00 VIN = 16 to 40 V DC IOUT = 0 to Full Load VIN = 16, 28, and 40 VDC ±14.85 30 40 ±15.00 75 120 ±5 16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25°C Input to output @500 VDC No effect on performance TC = +25°C (total for both outputs) Short Circuit Overload, TC = +25°C IOUT = Full Load -55°C to +125°C -55°C to +135°C -65°C to +135°C 80 100 28 25 82 500 500 40 75 18 50 75 150 ±5 16 28 18 100 100 VDC mADC mADC mA p-p % MΩ µF 9.0 14 600 700 9.0 14 600 700 W W KHz KHz 79 100 25 82 500 500 40 75 18 50 mV mV % 50% Load to 100% Load No Load to 50% Load ±100 ±250 ±450 ±760 ±100 ±250 ±450 ±750 mVpk mVpk 50% Load to 100% Load No Load to 50% Load 50% Load to No Load 25 500 3.0 70 1500 5.0 25 500 3.0 70 1500 5.0 µs µs ms Input Input Input Input ±180 -600 5.0 5.0 1200 -1500 10 10 ±180 -600 5.0 5.0 1500 -1500 10 10 mVpk mVpk ms ms 0.0 14 14 600 25 25 0.0 14 14 600 25 25 mVpk ms ms step step step step 16 40 16 40 to to to to 40 16 40 16 VDC VDC VDC VDC VIN = 16 to 40 V DC IOUT = 0 to Full Load VIN = 16 to 40 V DC Notes to Specifications 1. 2. 3. 4. 5. 6. 7. Above +125°C case temperature, derate output power linearly to 0 at +135°C case. Recovery time is measured from the initiation of the input transient to where VOUT has returned to within ±1% of V OUT at 50% load. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin. Load current split equally between +V OUT and –VOUT. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W. 3W load on output under test, 3W to 27W on other output. Sync. Input signal: VIL = -0.5V Min, 0.8V Max and V IN = 2.5V Min, 11.5V Max for 10% to 90% duty cycle. www.irf.com 5 ATR28XXD Series Block Diagram 1 3 +Vout EMI Filter +Input Regulator 2 Inhibit Input 4 Primary Housekeeping Supply Output Return 5 -Vout 8 Case 9 Sync Drive Error Amp & Ref Pulse Width FB Modulator CS 10 Input Return Application Information Thermal Management Inhibit Function Assuming that there is no forced air flow, the package temperature rise above ambient (∆T) may be calculated using the following expression: Connecting the inhibit input (Pin 2) to input common (Pin 10) will cause the converter to shut down. It is recommended that the inhibit pin be driven by an open collector device capable of sinking at least 400µA of current. The open circuit voltage of the inhibit input is 11.5 ±1.0VDC. EMI Filter An EMI filter (AFC461), available as an option, will reduce the input ripple current to levels below the limits imposed by MIL-STD-461B CEO3. ∆Τ = 80 A Pd 0.85 (°C) (1) where A = the effective surface area in square inhes (in-cluding heat sink if used), Pd = power dissipation in watts. The total surface area of the ATR standard package is 7.34 square inches. If a worse case full load efficiency of 78% is assumed, then the case temperature rise can be calculated as follows: ⎡ 1 ⎤ ⎡ 1 ⎤ Pd = POUT ⎢ − 1⎥ = 30 ⎢ − 1⎥ = 8.5W Eff 78 ⎣ ⎦ ⎣ ⎦ Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to slight difference in the switching frequencies of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10KHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communications, radar or telemetry). The International Rectifier ATR28XX converters provide a synchronizing input permitting synchronization of multiple converters to the frequency of the users system clock, thereby minimizing this type of noise. –0.7 and ∆Τ = 80 (7.34) –0.7 (8.5) 0.85 = 122°C Hence, if T AMBIENT = +25°C, the DC/DC converter case temperature will be approximately 147°C if no heat sink or air flow is provided. To calculate the heat sink area required to maintain a specific case temperature rise, equation (1) may be manipulated as follows: ⎡ ∆T ⎤ AHEATSINK = ⎢ 0. 85 ⎥ ⎣⎢ 80Pd ⎦⎥ −1.43 − APKG As an example, if it is desired to limit the case temperature rise to a maximum of 50°C above ambient, the required effective heat sink area is: ⎡ ⎤ 50 AHEATSINK = ⎢ 0. 85 ⎥ 80 ( 8 . 5 ) ⎣ ⎦ 6 −1.43 − 7.34 = 19.1in 2 www.irf.com ATR28XXD Series Mechanical Outlines Non-Flanged Flanged Ø 0.162 2 Holes 0.050 0.800 6 10 8 7 4 5 4 X 0.400 =1.600 3 1.110 2.110 Max 2 2.550 1 2.880 Max 9 0.040 D X 0.26 L Pins 2.110 0.390 Max 0.390 Max Pin Designation Pin # Designation 1 + Input 2 Inhibit Input 3 + Output 4 Output Return 5 - Output 6 NC 7 NC 8 Case Ground 9 Sync. 10 Input Return Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number 5962-94627 5962-94628 www.irf.com Vendor Cage Code 52467 52467 IR Standard Part Number ATR2812D ATR2815D 7 ATR28XXD Series Device Screening Requirement MIL-STD-883 Method Element Evaluation Non-Destructive Bond Pull No Suffix ES HB CH -20°C to +85°C -55°C to +125°C -55°C to +125°C -55°C to +125°C Temperature Range MIL-PRF-38534 N/A N/A N/A Class H 2023 N/A N/A N/A N/A Internal Visual 2017 Yes Yes Yes Temperature Cycle 1010 N/A Cond B Cond C Cond C Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs N/A N/A PIND 2020 N/A N/A Burn-In 1015 N/A 48 hrs@hi temp Final Electrical MIL-PRF-38534 25°C 25°C 160 hrs@125°C 160 hrs@125°C -55°C, +25°C, -55°C, +25°C, ( Group A ) & Specification +125°C +125°C PDA MIL-PRF-38534 N/A N/A N/A 10% Seal, Fine and Gross 1014 Cond A Cond A, C Cond A, C Cond A, C Radiographic 2012 N/A N/A N/A N/A External Visual 2009 Yes Yes Yes Notes: Best commercial practice Sample tests at low and high temperatures -55°C to +105°C for AHE, ATO, ATW Part Numbering ATR 28 15 D F /CH Screening Level Model Input Voltage Nominal Package Style Output Voltage Output 28 = 28V 12 = ±12V 15 = ±15V (Please refer to Screening Table) No Suffix, ES, HB, CH F = Flange Blank = Non - Flanged D = Dual WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR SANTA CLARA: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 01/2007 8 www.irf.com