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International Rectifier Electronic Components Datasheet

AHV2812S Datasheet

HYBRID-HIGH RELIABILITY DC-DC CONVERTER

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HYBRID-HIGH RELIABILITY
DC-DC CONVERTER
PD-94583C
AHV28XX SERIES
28V Input, Single, Dual and Triple Output
Description
The AHV Series of DC-DC converters are designed to
replace the AHE/ATO family of converters in applications
requiring compliance to MIL-STD-704A through E, in
particular the input surge requirement of 80V specified to
withstand transient input voltage of 80V. No input voltage
or output power derating is necessary over the full military
temperature range.
These converters are packaged in an extremely rugged,
low profile package that meets all requirements of
MILSTD-883 and MIL-PRF-38534. Parallel seam weld
sealing and the use of ceramic pin feed thru seals assure
long term hermeticity after exposure to extended
temperature cycling.
The basic circuit is a push-pull forward topology using
power MOSFET switches. The nominal switching
frequency is 500kHz. A unique current injection circuit
assures current balancing in the power switches. All AHV
series converters use a single stage LC input filter to
attenuate input ripple current. A low power 11.5V series
regulator provides power to an epitaxial CMOS custom
pulse width modulator integrated circuit. This single
integrated circuit provides all PWM primary circuit
functions. Power is transferred from primary to secondary
through a ferrite core power transformer. An error voltage
signal is generated by comparing a highly stable reference
voltage with the converter output voltage and drives the
PWM through a unique wideband magnetic feedback
circuit. This proprietary feedback circuit provides an
extremely wide bandwidth, high gain control loop, with
high phase margin. The feedback control loop gain is
insensitive to temperature, radiation, aging, and variations
in manufacturing. The transfer function of the feedback
circuit is a function of the feedback transformer turns ratio
which cannot change when subjected to environmental
extremes.
Manufactured in a facility fully qualified to MIL-PRF-
38534, these converters are fabricated utilizing DLA
qualified processes. For available screening options, refer
to device screening table in the data sheet. Variations in
electrical, mechanical and screening can be accommodated.
Contact IR San Jose for special requirements.
AHV
Features
80V Transient Input (100 msec max.)
50VDC Input (Continous)
16V to 40VDC Input Range
Single, Dual and Triple Outputs
15W Output Power
(No Temperature Derating)
Low Input / Output Noise
Full Military Temperature Range
Wideband PWM Control Loop
Magnetic Feedback
Low Profile Hermetic Package (0.405”)
Short Circuit and Overload Protection
Constant Switching Frequency (500kHz)
True Hermetic Package (Parallel Seam
Welded, Ceramic Pin Feedthru)
Standard Microcircuit Drawings Available
1
International Rectifier HiRel Products, Inc.
2019-01-21


International Rectifier Electronic Components Datasheet

AHV2812S Datasheet

HYBRID-HIGH RELIABILITY DC-DC CONVERTER

No Preview Available !

AHV28XX SERIES
(28V Input, Single, Dual and Triple Output)
Specifications (Single Output Models)
TCASE = -55°C to +125°C, VIN = +28V ±5% unless otherwise specified
Absolute Maximum Ratings
Input voltage
Power output
Soldering temperature
Operating case temperature
Storage case temperature
-0.5V to +50VDC (Continous), 80V (100 msec)
Internally limited, 17.5W typical
300°C for 10 seconds (1 pin at a time)
-55°C to +125°C
-65°C to +135°C
TEST
STATIC
CHARACTERISTICS
OUTPUT
Voltage
Current
Ripple Voltage1
Power
REGULATION
Line
Load
INPUT
Current
Ripple Current
EFFICIENCY
ISOLATION
Capacitive Load 2,3
Load Fault
Power Dissipation
Switching Frequency
DYNAMIC
CHARACTERISTICS
Step Load Changes
Output Transient5
Recovery5,6
Step Line Changes
Output Transient
Recovery
TURN-ON
Overshoot
Delay
Load Fault Recovery
SYMBOL
Condition
-55°C TC +125°C,
VIN = 28 VDC ±5%, CL=0,
unless otherwise specified
Group A
Subgroups
AHV2805S
Min Max
AHV2812S
Min Max
AHV2815S
Min Max
Units
VOUT
IOUT
VRIP
POUT
VRLINE
VRLOAD
IIN
IRIP
EFF
ISO
CL
PD
FS
VIN = 16, 28, and 40 VDC
IOUT = 0
VIN = 16, 28, and 40 VDC
VIN = 16, 28, and 40 VDC
BW = DC to 1 MHz
VIN = 16, 28, and 40 VDC
VIN = 16, 28, and 40 VDC
IOUT = 0, half load and full load
VIN = 16, 28, and 40 VDC
IOUT = 0, half load and full load
IOUT = 0, Inhibit (pin 2) = 0
IOUT = 0, Inhibit (pin 2) = Open
IOUT = Full load
IOUT = Full Load
TC = +25°C
Input to output or any pin to
case (except pin 8) at 500
VDC, TC = +25°C
No effect on DC performance
TC = +25°C
Overload, TC = +25°C4
Short Circuit, TC = +25°C
IOUT = Full Load
1
2,3
1,2,3
1,2,3
1,2,3
1
2,3
1,2,3
1,2,3
1,2,3,
1
1
4
1
4
4.95
5.05
11.88
12.12
14.85
15.15
V
4.90
5.10
11.76
12.24
14.70
15.30
V
0.0 3.00 0.0 1.25 0.0 1.00
A
60 60 60 mVp-p
15 15 15 W
-5.0 5.0 -30 30 -35 35
-25 25 -60 60 -75 75 mV
-50 50 -120 120 -150 150
18 18 18 mA
50 50 50 mA
50 50 50 mAp-p
72 72 72 %
100 100 100 M
500 200 200 F
10
10
10
10
10
10
W
450 550 450 550 450 550 KHz
VOTLOAD
TTLOAD
50% Load From/To 100% Load
No Load From/To 50%
50% Load From/To 100%
No Load From/To 50% Load
50% Load From/To No lLoad
VOTLINE
TTLINE
Input step 16 to 40 VDC 3,7
Input step 40 to 16 VDC 3,7
Input step 16 to 40 VDC 3,6,7
Input step 40 to 16 VDC 3,6,7
VTonos
T on D
TRLF
IOUT = 0A and Full Load
IOUT = 0A and Full Load 8
VIN = 16 to 40 VDC
4
4
4
4
4
4
4
4
4
4,5,6
4,5,6
4,5,6
-300
-500
+300
+500
70
200
5.0
300
-1000
800
800
550
10
10
-300
-750
+300
+750
70
1500
5.0
500
-1500
800
800
750
10
10
-300
-750
+300
+750
70
1500
5.0
500
-1500
800
800
750
10
10
mVpk
mVpk
s
s
ms
mVpk
mVpk
s
s
mVpk
ms
ms
Notes: To Specifications (Single Output Models)
1. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz.
2. Capacitive load may be any value from 0 to the maximum limit without affecting dc performance. A capacitive load in excess of the maximum limit will not disturb loop
stability but will interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on.
3. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter shall be guaranteed to the limits specified.
4. An overload is that condition with a load in excess of the rated load but less than necessary to trigger the short circuit protection and is the condition of maximum power
dissipation.
5. Load step transition time between 2s to 10 s.
6. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of VOUT at 50% load.
7. Input step transition time between 2μs and 10μs.
8. Turn on delay time measurement is for either a step application of power at input or the removal of a ground signal from the inhinbit pin (pin 2) while power is applied to
the input. Above 125°C case temperature, derate output power linearly to 0 at 135°C case.
2
International Rectifier HiRel Products, Inc.
2019-01-21


Part Number AHV2812S
Description HYBRID-HIGH RELIABILITY DC-DC CONVERTER
Maker International Rectifier
Total Page 10 Pages
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