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PD - 94550A
ATR28XXD SERIES 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. Manufactured in a facility fully qualified to MIL-PRF38534, 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. Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact IR Santa Clara with specific requirements.
28V Input, Dual Output
ATR Features
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 -55C to +125C 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
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01/12/07
ATR28XXD Series Specifications
TCASE = -55C to +85C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input voltage Power Output Soldering temperature Temperature Range 1 -0.5V to +50VDC Internally limited, 36W typical 300C for 10 seconds Recommended Operating temperature Maximum Operating temperature Storage case temperature
-55C to +85C -55C to +115C -65C to +135C
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
Condition -55C TC +85C, VIN = 28 V DC 5%, CL=0, unless otherwise specified
ATR2812D Min Typ Max Min
ATR2815D Typ Max Units
VIN = 16 to 40 V DC IOUT = 0 to Full Load Full Load, 20KHz to 2MHz T CASE = 25C, Full Load V IN = 16 to 40 V DC IOUT = 0 to Full Load V IN = 16, 28, and 40 VDC
11.76 0.0 11.88 30
12 40 12
12.24 1.25 85 12.12 75 120 5
14.70 0.0 14.85 30
15 40 15.00
15.30 1.0 85 15.15 75 150 5
VDC ADC mV p-p VDC W mV mV % VDC mA DC mA DC mA p-p % M F W W KHz KHz mVpk mVpk s s ms mVpk mVpk ms ms
16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25C Input to output @500 V DC No effect on performance T C = +25C (total for both outputs) Short Circuit Overload, T C = +25C IOUT = Full Load
28 25 82
40 75 18 50
16
28 25 82
40 75 18 50
100 100 9.0 14 600 700 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14 600 25 25
100 100 9.0 14 600 700 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14 600 25 25
500 500
500 500
50% Load to 100% Load No Load to 50% Load 50% Load to 100% Load No Load to 50% Load 50% Load to No Load Input step Input step Input step Input step 16 40 16 40 to to to to 40 16 40 16 V DC V DC V DC V DC
Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery
V IN = 16 to 40 V DC IOUT = O and Full Load V IN = 16 to 40 V DC
mVpk ms ms
Notes to Specifications
1. 2. 3. 4. 5. 6. 7. Above +85C case temperature, derate output power linearly to 0 at +115C 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.
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ATR28XXD Series Specifications
TCASE = -55C to +125C, 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 T em perature R ange 1 -0.5V to +50V DC Internally lim ited, 36W typical 300C for 10 seconds Recom m ended O perating tem perature M axim um Operating tem perature Storage case tem perature
Condition -55C TC +125C, V IN = 28 VDC 5%, CL=0, unless otherwise specified
-55C to +125C -55C to +135C -65C to +135C
ATR2812D/ES Min Typ Max Min
ATR2815D/ES Typ Max Units
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
VIN = 16 to 40 V DC IOUT = 0 to Full Load Full Load, 20KHz to 2MHz TCASE = 25C, Full Load VIN = 16 to 40 V DC IOUT = 0 to Full Load VIN = 16, 28, and 40 V DC
11.76 0.0 11.88 30
12 40 12.00
12.24 1.25 85 12.12 75 120 5
14.70 0.0 14.85 30
15 40 15.00
15 1.0 85 15.15 75 150 5
V DC A DC mV p-p V DC W mV mV % V DC mA DC mA DC mA p-p % M F W W KHz KHz mVpk mVpk s s ms mVpk mVpk ms ms
16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25C Input to output @500 V DC No effect on performance TC = +25C (total for both outputs) Short Circuit Overload, TC = +25C IOUT = Full Load
28 25 82
40 75 18 50
16
28 25 82
40 75 18 50
80 100
79 100 100 9.0 14 600 700
100 9.0 14 600 700 100 250 25 500 3.0 180 -600 5.0 5.0
500 500 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14
500 500
50% Load to 100% Load No Load to 50% Load 50% Load to 100% Load No Load to 50% Load 50% Load to No Load 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
Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery
VIN = 16 to 40 V DC IOUT = O to Full Load VIN = 16 to 40 V DC
600 25 25
0.0 14 14
600 25 25
mVpk ms ms
Notes to Specifications
1. 2. 3. 4. 5. 6. 7. Above +125C case temperature, derate output power linearly to 0 at +135C 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.
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ATR28XXD Series Specifications
TCASE = -55C to +125C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input voltage Power Output Soldering temperature Temperature Range1 -0.5V to +50VDC Internally limited, 36W typical 300C for 10 seconds Recommended Operating temperature Maximum Operating temperature Storage case temperature
Condition -55C TC +125C, VIN = 28 V DC 5%, CL=0, unless otherwise specified
-55C to +125C -55C to +135C -65C to +135C
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
ATR2812D/HB Min Typ Max Min
ATR2815D/HB Typ Max Units
V IN = 16 to 40 VDC I OUT = 0 to Full Load Full Load, 20KHz to 2MHz T CASE = 25C, Full Load V IN = 16 to 40 VDC I OUT = 0 to Full Load V IN = 16, 28, and 40 V DC
11.76 0.0 11.88 30
12.00 40 12.00
12.24 1.25 85 12.12 75 120 5
14.70 0.0 14.85 30
15 40 15.00
15.30 1.0 85 15.15 75 150 5
VDC ADC mV p-p VDC W mV mV % VDC mADC mADC mA p-p % M F W W KHz KHz mVpk mVpk s s ms mVpk mVpk ms ms mVpk ms ms
16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25C Input to output @500 V DC No effect on performance T C = +25C (total for both outputs) Short Circuit Overload, T C = +25C I OUT = Full Load
28 25 82
40 75 18 50
16
28 18 25 82
40 75 18 50
80 100
79 100 100 9.0 14 600 700
100 9.0 14 600 700 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14 450 750 70 1500 5.0 1500 -1500 10 10 600 25 25
500 500 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14
500 500
50% Load to 100% Load No Load to 50% Load 50% Load to 100% Load No Load to 50% Load 50% Load to No Load 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
450 760 70 1500 5.0 1200 -1500 10 10 600 25 25
Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery
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 +125C case temperature, derate output power linearly to 0 at +135C 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.
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ATR28XXD Series Specifications
TCASE = -55C to +125C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input voltage Power Output Soldering temperature Temperature Range 1 -0.5V to +50VDC Internally limited, 36W typical 300C for 10 seconds Recommended Operating temperature Maximum Operating temperature Storage case temperature
Condition -55C TC +125C, VIN = 28 V DC 5%, CL=0, unless otherwise specified
-55C to +125C -55C to +135C -65C to +135C
ATR2812D/CH Min Typ Max Min
ATR2815D/CH Typ Max Units
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
VIN = 16 to 40 V DC IOUT = 0 to Full Load Full Load, 20KHz to 2MHz TCASE = 25C, Full Load VIN = 16 to 40 V DC IOUT = 0 to Full Load VIN = 16, 28, and 40 VDC
11.76 0.0 11.88 30
12.00 40 12.00
12.24 1.25 85 12.12 75 120 5
14.70 0.0 14.85 30
15 40 15.00
15.30 1.0 85 15.15 75 150 5
VDC ADC mV p-p VDC W mV mV % VDC mADC mADC mA p-p % M F W W KHz KHz mVpk mVpk s s ms mVpk mVpk ms ms mVpk ms ms
16 No Load, pin 2 = open Inhibited, pin 2 tied to pin 10 Full Load Full Load TC = +25C Input to output @500 VDC No effect on performance TC = +25C (total for both outputs) Short Circuit Overload, TC = +25C IOUT = Full Load
28 25 82
40 75 18 50
16
28 18 25 82
40 75 18 50
80 100
79 100 100 9.0 14 600 700
100 9.0 14 600 700 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14 450 750 70 1500 5.0 1500 -1500 10 10 600 25 25
500 500 100 250 25 500 3.0 180 -600 5.0 5.0 0.0 14 14
500 500
50% Load to 100% Load No Load to 50% Load 50% Load to 100% Load No Load to 50% Load 50% Load to No Load Input Input Input Input step step step step 16 40 16 40 to to to to 40 16 40 16 VDC VDC VDC VDC
450 760 70 1500 5.0 1200 -1500 10 10 600 25 25
Step Line Changes Output Transient Recovery 2 TURN-ON Overshoot Delay3 Load Fault Recovery
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 +125C case temperature, derate output power linearly to 0 at +135C 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.
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ATR28XXD Series
Block Diagram
1 +Input Regulator 2 Inhibit Input 8 Case 9 Sync
Drive
EMI Filter
3 +Vout
4
Output Return
Primary Housekeeping Supply
5 -Vout
Pulse Width FB Modulator
CS
Error Amp & Ref
10 Input Return
Application Information
Inhibit Function
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 400A of current. The open circuit voltage of the inhibit input is 11.5 1.0VDC.
Thermal Management
Assuming that there is no forced air flow, the package temperature rise above ambient (T) may be calculated using the following expression:
= 80 A
-0.7
Pd
0.85
(C)
(1)
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.
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.
and
= 80 (7.34)
-0.7
(8.5)
0.85
= 122C
Hence, if T AMBIENT = +25C, the DC/DC converter case temperature will be approximately 147C 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 50C above ambient, the required effective heat sink area is:
50 AHEATSINK = 80(8.5) 0.85
-1.43
- 7.34 = 19.1in 2
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ATR28XXD Series Mechanical Outlines
Flanged
O 0.162 2 Holes 0.050 0.800
Non-Flanged
0.040 D X 0.26 L Pins
10
1 2
2.880 Max
2.550
2.110 Max
4 X 0.400 =1.600
9
2.110
8
3
7
4
6
5
0.390 Max
1.110
0.390 Max
Pin Designation
Pin # 1 2 3 4 5 6 7 8 9 10 Designation + Input Inhibit Input + Output Output Return - Output NC NC Case Ground Sync. Input Return
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit Drawing Number
5962-94627 5962-94628
Vendor Cage Code 52467 52467
IR Standard Part Number
ATR2812D ATR2815D
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ATR28XXD Series
Device Screening
Requirement
Temperature Range Element Evaluation Non-Destructive Bond Pull Internal Visual Temperature Cycle Constant Acceleration PIND Burn-In Final Electrical ( Group A ) PDA Seal, Fine and Gross Radiographic External Visual MIL-PRF-38534 2023 2017 1010 2001, Y1 Axis 2020 1015 MIL-PRF-38534 & Specification MIL-PRF-38534 1014 2012 2009 N/A Cond A N/A N/A Cond A, C N/A Yes N/A N/A N/A N/A 25C
MIL-STD-883 Method
No Suffix
N/A N/A
ES
N/A N/A Yes Cond B 500 Gs N/A 48 hrs@hi temp 25C
HB
N/A N/A Yes Cond C 3000 Gs N/A -55C, +25C, +125C N/A Cond A, C N/A Yes
CH
Class H N/A Yes Cond C 3000 Gs N/A -55C, +25C, +125C 10% Cond A, C N/A Yes
-20C to +85C -55C to +125C
-55C to +125C -55C to +125C
160 hrs@125C 160 hrs@125C
Notes:
Best commercial practice Sample tests at low and high temperatures -55C to +105C for AHE, ATO, ATW
Part Numbering ATR 28 15 D F /CH
Model Input Voltage Nominal
28 = 28V
Screening Level Package Style Output
(Please refer to Screening Table)
No Suffix, ES, HB, CH F = Flange Blank = Non - Flanged
Output Voltage
12 = 12V 15 = 15V
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
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