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PD-94551A
ATR28XXT SERIES HYBRID-HIGH RELIABILITY DC/DC CONVERTERS
Description
The ATR28XXT Series of DC/DC converters provide 30 watts of output power over the full military temperature range with no derating. These devices are pin compatible with the ATO series converters but offer twice the maximum output power in a lower profile package. A custom CMOS ASIC pulse width modulator operating at a nominal switching frequency of 550KHz combined with a unique magnetic feedback reduces circuit complexity for enhanced reliability. These converters provide 500 volt input to output isolation and operate in highly efficient single forward mode. The advanced feedback design and high operating frequency provide an extremely wide bandwidth control loop with high gain and phase margin. This results in fast dynamic line and load response as well as superior audio rejection. The control loop is compensated to provide optimum performance over the full military temperature range and over the 16 to 40 volt input voltage range. These converters are protected against both continuous output short circuits and output overload. Either load fault condition will result in operating in a low power dissipation foldback mode. The converters will shut down for approximately 15 milliseconds, then attempt to restart. This cycle will continue indefinitely unless the load fault is corrected. Recovery to normal operation is automatic upon removal of the load fault. Manufactured in a facility full qualified to MIL-PRF38534, these converters are available in four screening grades to satisfy a wide range of requirements. The CH grade is fully compliant to the requirements of MILPRF-38534 for class H. The HB grade is processed and screened to the class H requirement, but element evaluation and Periodic Inspections (PI) are not required. Both grades are tested to meet the complete group "A" test specification over the full military temperature range without output power deration.
28V Input, Triple Output
ATR Features
n n n n n n n n n n 30 Watt Output Power Flexible Output Loading -55C to +125C Operation Pin Compatible with ATO 0.410" Maximum Height 16 to 40 VDC Input Range 500 Volt Input to Output Isolation High Audio Rejection MIL-STD-704 Compatible Load Fault Protection - Short Circuit and Overload n TTL level Compatible Synchronization
Two grades with more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be limited accomodated. Contact IR Santa Clara with specific requirements.
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1
12/08/04
ATR28XXT Series Specifications
TCASE = -55C to +125C, VIN = +28V 5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS Input Voltage Range Power Output Lead Temperature Storage Temperature
1
-0.5V to 50VDC Internal limited 37.5W +300C -65C to 150C case
Conditions -55C TC +125C, VIN = 28 VDC 5%, CL=0, unless otherwise specified ATR2812T Min Max ATR2815T Min Max
Units
Test STATIC CHARACTERISTICS OUTPUT Voltage1
Symbol
VOUT
Current1,2,3,4 Ripple1,5
IOUT VRIP
IOUT = 0 (main) +25C over temp. range IOUT = 0 (dual)1 +25C over temp. range VIN = 16, 28, and 40VDC (main) VIN = 16, 28, and 40VDC (dual)1 VIN = 16, 28, and 40VDC (dual) BW = 20Hz to 2MHz (main) VIN = 16, 28, and 40 VDC BW = 20Hz to 2 MHz (dual) VIN = 16, 28, and 40 VDC POUT = .5, 10, 20W (main) VIN = 16, 28, and 40 VDC(dual) POUT = 0, 5, 10W (dual) VIN = 16, 28, and 40 VDC POUT = .5, 10, 20W (main) VIN = 16, 28, and 40 VDC POUT = o, 5, 10W (dual) IOUT = 0, inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 8) = open IOUT = 4000mA (main) POUT = 10W (dual) BW = 20Hz to 2MHz IOUT = 4000mA (main) +25C POUT = 10W (dual) over temp. range
Input to output or any pin to case
4.95 4.90 11.88 11.76 100.0 0.0
5.05 5.10 12.12 12.24 4000 625 60 40 25 60 50 60 15 75 50
4.95 4.90 14.85 14.70 100.0 0.0
5.05 5.10 15.15 15.30 4000 500 60 40 25 75 50 75 15 75 50
VDC VDC VDC VDC mA mA mVp-p mVp-p mV mV mV mV
REGULATION Line1,3
VRLINE
Load1,3
VRLOAD
INPUT Current Ripple Current4 EFFICIENCY ISOLATION Load Fault Power Dissipation3 Switching Frequency SYNC Frequency Range Inhibit Open Circuit Voltage Output Response to Step transient Load changes7 Recovery Time Step Step transient Load changes7,8
IIN IRIP EFF ISO PD FS FSYNC VOI VOTLOA
D
mA mA mAp-p %
75 72 100 14 9 600 700 13 +500 +1000 200 5 10
75 72 100 14 9 600 700 13 +500 +1000 200 5 10
(except pin 8)at 500 TC=+25C Overload Short circuit 50% load to/from 100% load no load to/from 50% load 50% load to/from 100% load No load to/from 50% load 50% load to/from 100% load No load to 50% load 50% load to no load
500 500 9 -500 -1000
500 500 9 -500 -1000
M W W KHz KHz V
mVpk
TTLOAD
s ms ms
For Notes to Specifications, refer to page 3
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ATR28XXT Series Specifications
TCASE = -55C to +125C, VIN = +28V 5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS Input Voltage -0.5V to 50VDC Power Output Internally limited, 37.5W typical Soldering 300C for 10 seconds Temperature Range 6 Operating -55C to +135C case Storage -65C to +135C
Test
Symbol
Conditions -55C TC +125C, VIN = 28 VDC 5%, CL=0, unless otherwise specified
ATR2812T Min Max
ATR2815T Min Max Units
STATIC CHARACTERISTICS Output Response to Transient step9 Line changes10 Recovery Time8 Transient step9 Line changes10 Turn on Overshoot1 Turn on Delay 1, 11 Load Fault Recovery10 Device weight
VOTLINE TTLINE VTonOS TonD TRLF
Input step 16 from/to 40 VDC IOUT = 4000mA (main) POUT = 10W (dual) Input step 16 from/to 40 VDC IOUT = 4000mA (main) POUT = 10W (dual) IOUT = 0, and 4000mA (main) POUT = 0, 10W (dual) IOUT = 0, 4000mA (main) POUT = 0, 10W (dual)
1500
1500
mV pk
10 1000 25 25 65
10 1000 25 25 65
ms mV pk ms ms g
Notes to Specifications
Tested at each output. Parameter guaranteed byline and load regulation tests. Although operation with no load is permissible, light loading on the main (+5 volt) output may cause the output voltage of the auxiliary outputs (12 volt or 15 volt) to drop out of regulation. It is therefore recommended that at least 100mA or 20 percent of the output power, whichever is greater, be taken from the main (+5 volt) output. 4. Total combined output power -30 watts. 5. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. 6. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the overload protection circuit and is the condition of maximum power dissipation. 7. Load step transition time between 2 and 10 microseconds. 8. Recovery time is measured from the initiation of the transient to where VOUT has returned to within 1 percent of VOUT at 50 percent load. 9. Input step transition time between 2 to 10 microseconds. 10. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be guaranteed to the limits specified in the table. 11. Turn on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 8) while power is applied to the input. 1. 2. 3.
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3
ATR28XXT Series
ATR28XXT Block Diagram
5 +Vout EMI Filter
1 +Input
Tracking Regulator
8 Enable 7 Case 9 Sync Input Return 10
Primary Housekeeping Supply
4 -Vout 2 +Vout
Drive
3 Return Error Amp & Ref
Pulse Width FB Modulator
CS
4
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ATR28XXT Series
ATR28XXT Case Outline
1.000 0.040 D X 0.26 L Pins 0.05
10
1
9
2
4 X 0.400 =1.600 1.95 2.360 2.700 Max
8
3
7
4
6
Pin Designation
Pin No. 1 2 3 4 5 6 7 8 9 10 Designation Positive Input +5VDC Output Output Return Negative Dual Output Positive Dual Output N/C Case Ground Enable Input Sync Input Input Return
5
0.410 Max 1.350 Max
Part Numbering
ATR 28 15 T F / CH
Model Input Voltage Screening
-
, ES, HB, CH
28 = 28V Nominal
Package Style
F = Flange
Output Voltage
12 = 5V,12V: 15 = 5V,12V:
Outputs
T = Triple S = Single D = Dual
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ATR28XXT Series
Available Screening Levels and Process Variations for ATR28XXT Series
Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual MIL-STD-883 Method No Suffix -20 to +85C ES Suffix -55C to +125C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 2017 1010, Cond C 2001, Cond A 1015 MIL-PRF38534 1014 2009 Yes Cond B 500g 48hrs @ 85C 25C 48hrs @ 125C 25C Yes Yes Yes Yes 5,000 g 160hrs @ 125C -55, +25, +125C Yes Yes Yes Yes 5,000 g 160hrs @ 125C -55, +25, +125C Yes Yes
* Per Commercial Standards
Available Standard Military Drawing (SMD) Cross Reference
Standardized Military drawing PIN 5962-9315801HXX 5962-9315801HZX 5962-9215901HXX 5962-9215901HZX Vendor CAGE Code 52467 52467 52467 52467 Vendor Similar PIN ATR2812T/CH ATR2812TF/CH ATR2815T/CH ATR2815TF/CH
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. 12/2004
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