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PD - 94582
ATO28XXT SERIES ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS
Description
The ATO28XXT Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to the nominal input requirements of MIL-STD-704D, these devices have nominal 28VDC inputs with +5V and 12V or +5V and 15V triple outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated push-pull topology operating in the feed-forward mode at a nominal switching frequency of 250KHz. 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. Refer to Part Number section. They are provided in a standard plug-in package for PC mounting or in a flanged package for more severe environments. These converters are manufactured in a facility fully qualified to MIL-STD-1772. All processes used to manufacture these converters have been qualified to enable Advanced Analog to deliver compliant devices. Two screening grades are available to satisfy a wide range of requirements. The CH grade converters are fully compliant to MIL-PRF-38534 for class H. The HB grade converters are processed to full class H screening requirements but do not have class H element evaluation as directed by MIL-PRF-39534. Both grades are fully tested and operate over the full military temperature range without derating of output power. Variations in electrical, mechanical and screening can be accommodated. Extensive computer simulation using complex modeling enables modest design modifications to be accommodated. Contact Advanced Analog with specific requirements.
28V Input, Triple Output
ATO Features
n 16 to 40 VDC Input Range (28VDC Nominal) n 5V, 12V or 5V, 15V Outputs Available n Indefinite Short Circuit and Overload Protection n 15 Watts Output Power n Fast Loop Response for Superior Transient Characteristics n Operating Temperature Range from -55C to +125C Available n Popular Industry Standard Pin-out n Resistance Seam Welded Case for Superior Long Term Hermeticity n Efficiencies up to 81% n Shutdown from External Signal n 200,000 Hour MTBF at 85C
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11/20/02
ATO28XXT Series Specifications
TCASE = -55C to +85C, VIN = +28V 5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS Input Voltage -0.5V to 50V Power Output Internally limited, 17.5W typical Soldering 300C for 10 seconds Operating -55C to +115C case Temperature Range6 Storage -65C to +135C
TEST STATIC CHARACTERISTICS OUTPUT Voltage 1
SYMBOL
Condition -55C TC +85C, VIN = 28 VDC 5%, CL=0 unless otherwise specified
ATO2812T Min Max
ATO2815T Min Max Units
VOUT
IOUT = 0 (main) IOUT = 0 (dual)1
TC = 25C
Over Temp
TC = 25C
Over Temp
Current 1,2,3
IOUT VRIP POUT
Ripple Voltage 1,4 Power 1,2,3
VIN = 16, 28, and 40 VDC (main) VIN = 16, 28, and 40 VDC (dual)1 VIN = 16, 28, and 40 VDC (dual) BW = DC to 2 MHz (main) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (dual)) VIN = 16, 28, and 40 VDC (main) (+dual) (-dual) (total) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC (dual) IOUT = 0, 84, 167mA (dual) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC IOUT = 0, 84, 167mA (dual) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 167mA (dual) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 167mA (dual) Input to output or any pin to case (except pin 7) at 500 VDC, Overload Short Circuit IOUT = 2000mA (main) IOUT = 167mA (dual)
4.95 4.90 11.88 11.76 0.0 0.0
5.05 5.10 12.12 12.24 2000 208 80 40
4.95 4.90 14.85 14.70 0.0 0.0
5.05 5.10 15.15 15.30 2000 167 80 40
V V V V mA mA mVp-p mVp-p W W W W
10 2.5 2.5 15 25 TC = 25C
Over Temp
10 2.5 2.5 15 25 35 75 50 75
REGULATION Line 1,3
VRLINE
mV mV mV mV mV
Load 1,3
VRLOAD
30 60 50 60
INPUT Current Ripple Current
4
IIN IRIP
15 40 50
15 40 50
mA mA mAp-p
EFFICIENCY ISOLATION Load Fault Power Dissipation 3 Switching Frequency Inhibit Open Circuit Voltage
EFF ISO PD FS VOI
TC = 25C TC = 25C TC = 25C
76 100 8 6 275 13
76 100 8 6 275 13
% M W W KHz V
225 9
225 9
Notes to Specifications
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. At least 20 percent of the total output power should be taken from the (+5V volt) main output. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. Above 85C case temperature, derate output power linearly to 0 at 115C case.
2
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ATO28XXT Series Specifications
TCASE = -55C to +105C, VIN = +28V 5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS Input Voltage -0.5V to 50V Power Output Internally limited, 17.5W typical Soldering 300C for 10 seconds Operating -55C to +125C case Temperature Range6 Storage -65C to +135C
TEST SYMBOL Condition -55C TC +105C, VIN = 28 VDC 5%, CL=0 unless otherwise specified ATO2812T/ES Min STATIC CHARACTERISTICS OUTPUT Voltage 1 Max ATO2815T/ES Min Max Units
VOUT
IOUT = 0 (main) IOUT = 0 (dual)
1
TC = 25C Over Temp TC = 25C Over Temp
Current
1,2,3
IOUT
1,4
Ripple Voltage
VRIP
Power
1,2,3
POUT
VIN = 16, 28, and 40 VDC (main) VIN = 16, 28, and 40 VDC (dual)1 VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (main) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (dual)) VIN = 16, 28, and 40 VDC (main) (+dual) (-dual) (total) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC (dual) IOUT = 0, 84, 167mA (dual) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC IOUT = 0, 84, 167mA (dual) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 167mA (dual) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 167mA (dual) TC = 25C Input to output or any pin to case (except pin 7) at 500 VDC, TC = +25C Overload, TC = +25C5 Short Circuit, TC = +25C IOUT = 2000mA (main) IOUT = 167mA (dual)
4.95 4.90 11.88 11.76 0.0 0.0
5.05 5.10 12.12 12.24 2000 208 80 40
4.95 4.90 14.85 14.70 0.0 0.0
5.05 5.10 15.15 15.30 2000 167 80 40
V V V V mA mA mVp-p mVp-p W W W W
10 2.5 2.5 15 25 TC = 25C Over Temp 30 60 50 60
10 2.5 2.5 15 25 35 75 50 75
REGULATION Line 1,3
VRLINE
mV mV mV mV mV
Load
1,3
VRLOAD
INPUT Current Ripple Current 4
IIN IRIP
15 40 50
15 40 50
mA mA mAp-p
EFFICIENCY
EFF
TC = 25C
76
76
%
ISOLATION
ISO
TC = 25C
100
100
M
Load Fault Power Dissipation 3 Switching Frequency
PD
TC = 25C
8 6 225 9 275 13 225 9
8 6 275 13
W W KHz V
FS Inhibit Open Circuit Voltage VOI
Notes to Specifications
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. At least 20 percent of the total output power should be taken from the (+5V volt) main output. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. Above 105C case temperature, derate output power linearly to 0 at 125C case
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ATO28XXT Series Specifications
TCASE = -55C to +125C, VIN = +28V 5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS Input Voltage -0.5V to 50V Power Output Internally limited, 17.5W typical Soldering 300C for 10 seconds Operating -55C to +135C case Temperature Range6 Storage -65C to +135C
TEST SYMBOL Condition -55C TC +125C, VIN = 28 VDC 5%, CL=0 unless otherwise specified ATO2812T/HB Min STATIC CHARACTERISTICS OUTPUT Voltage 1 Max ATO2815T/HB Min Max Units
VOUT
IOUT = 0 (main) IOUT = 0 (dual)1
TC = 25C Over Temp TC = 25C Over Temp
Current 1,2,3 Ripple Voltage
1,4
IOUT VRIP
Power
1,2,3
POUT
VIN = 16, 28, and 40 VDC (main) VIN = 16, 28, and 40 VDC (dual)1 VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (main) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (dual)) VIN = 16, 28, and 40 VDC (main) (+dual) (-dual) (total) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC (dual) IOUT = 0, 84, 167mA (dual) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC IOUT = 0, 84, 167mA (dual) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 167mA (dual) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 167mA (dual) TC = 25C Input to output or any pin to case (except pin 7) at 500 VDC, TC = +25C Overload, TC = +25C5 Short Circuit, TC = +25C IOUT = 2000mA (main) IOUT = 167mA (dual)
4.95 4.90 11.88 11.76 0.0 0.0
5.05 5.10 12.12 12.24 2000 208 80 40
4.95 4.90 14.85 14.70 0.0 0.0
5.05 5.10 15.15 15.30 2000 167 80 40
V V V V mA mA mVp-p mVp-p W W W W
10 2.5 2.5 15 25 TC = 25C Over Temp 30 60 50 60
10 2.5 2.5 15 25 35 75 50 75
REGULATION Line 1,3
VRLINE
mV mV mV mV mV
Load
1,3
VRLOAD
INPUT Current Ripple Current 4
IIN IRIP
15 40 50
15 40 50
mA mA mAp-p
EFFICIENCY
EFF
TC = 25C
76
76
%
ISOLATION
ISO
TC = 25C
100
100
M
Load Fault Power Dissipation 3 Switching Frequency
PD
TC = 25C
8 6 225 9 275 13 225 9
8 6 275 13
W W KHz V
FS Inhibit Open Circuit Voltage VOI
Notes to Specifications
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. At least 20 percent of the total output power should be taken from the (+5V volt) main output. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. Above 125C case temperature, derate output power linearly to 0 at 135C case
4
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ATO28XXT Series
ATO28XXT Block Diagram
5 + V out
R e g u la to r
4 -V out 1 + Input EM I F ilter 2 + 5V out
8 E nable
D riv e 1
3 R eturn
P ulse W idth D riv e 2 M odulator
FB
E rro r A m p & R e fe ren ce
Input R eturn 10
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ATO28XXT Series
ATO28XXT Case Outline
Non-Flanged
1.000 0.040 D X 0.26 L Pins 0.05
Flanged
10
1
9
2
1.950 M ax
4 X 0.400 =1.600
1.95
2.360
2.700 M ax
8
3 4
6
7
5
1.350 M ax
0.500 M ax 0.500 M ax 1.350 M ax
Pin Designation
Pin No. 1 2 3 4 5 6 7 8 9 10 Designation + Input + 5V Output DC Input Output Return -Dual Output + Dual Output N/C Case Ground Enable Input N/C Input Return
M odel In p u t V o lta ge
28 = 28V
Part Numbering
A TO 28 15 T / C H
S cre e n in g L e ve l
-- , ES, H B, C H
O u tp u t V o lta ge s
15 = 5V, 15V 12 = 5V, 12V
O u tp u ts
T = T riple
6
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ATO28XXT Series
Available Screening Levels and Process Variations for ATO28XXT Series
Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual 2017 1010, Cond C 2001, Cond A Yes Cond A 500g Yes Yes 5,000g MIL-STD-883 Method No Suffix -55C to +85C ES Suffix -55C to +125C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 Yes Yes 5,000g
1015 MIL-PRF-38534 & Specification 1014 2009
48 hrs @ 85C 25C
48hrs @ 105C 25C
160hrs @ 125C -55, +25, +125C
160hrs @ 125C -55, +25, +125C
Yes Yes
Yes Yes
Yes Yes
* Per Commercial Standards
Available Standard Military Drawing (SMD) Cross Reference
Standardized Military Drawing Pin 5962-9095401HXX 5962-9095401HZX 5962-9160201HXX 5962-9160201HZX Vendor CAGE Code 52467 52467 52467 52467 Vendor Similar Pin ATO2815T/CH ATO2815TF/CH ATO2812T/CH ATO2812TF/CH
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331 ADVANCED ANALOG: 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. 11/02
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