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부품번호 AHV28xx 기능
기능 ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS
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AHV28xx 데이터시트, 핀배열, 회로
PD - 94583
AHV28XX SERIES
ADVANCED ANALOG
28V Input, Single, Dual and Triple Output
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS
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Description
The AHV Series of DC/DC converters are designed to
replace the AHE/ATO family of converters in applica-
tions requiring compliance to MIL-STD-704A through
E, in particular the input surge requirement of 80 volts
specified to withstand transient input voltage of 80 volts.
No input voltage or output power derating is necessary
over the full military temperature range.
These converters are packaged in an extremely rug-
ged, low profile package that meets all requirements of
MIL-STD-883 and MIL-PRF-38534. Parallel seam weld
sealing and the use of ceramic pin feedthru seals as-
sure 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 fre-
quency 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 11.5volt
series regulator provides power to an epitaxial CMOS
custom pulse width modulator integrated circuit. This
single integrated circuit provides all PWM primary cir-
cuit functions. Power is transferred from primary to sec-
ondary through a ferrite core power transformer. An
error voltage signal is generated by comparing a highly
stable reference voltage with the converter output volt-
age 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, radia-
tion, aging, and variations in manufacturing. The trans-
fer 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 available in four screen-
ing grades to satisfy a wide range of requirements.
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AHV
Features
n 80 Transient Input (100 msec max.)
n 50 VDC Input (Continous)
n 16 to 40 VDC Input Range
n Single, Dual and Triple Outputs
n 15 Watts Output Power
(No Temperature Derating)
n Low Input / Output Noise
n Full Military Temperature Range
n Wideband PWM Control Loop
n Magnetic Feedback
n Low Profile Hermetic Package (0.405”)
n Short Circuit and Overload Protection
n Constant Switching Frequency (500KHz)
n True Hermetic Package (Parallel Seam
Welded, Ceramic Pin Feedthru)
The CH grade is fully compliant to the require-
ments of MIL-PRF-38534 for class H. The HB
grade is processed and screened to the class H
requirement, but may not necessarily meet all of
the other MIL-PRF-38534 requirements, e.g., el-
ement evaluation and Periodic Inspection (P.I.)
not required. Both grades are tested to meet the
complete group “A” test specification over the full
military temperature range without output power
deration. Two grades with more limited screen-
ing are also available for use in less demanding
applications. Variations in electrical, mechanical
and screening can be accommodated. Contact
Advanced Analog for special requirements.
1
11/20/02




AHV28xx pdf, 반도체, 판매, 대치품
AHV28XX Series
Specifications (Triple Output Models)
TCASE = -55°C to +125°C, VIN = +28V ± 5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage
-0.5V to 50VDC (continuous) 80V (100ms)
Power Output
Internally limited, 17.5W typical
Soldering
300°C for 10 seconds (1 pin at a time)
Temperature Range
Operating
-55°C to +135°C
Storage
-65°C to +135°C
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TEST
STATIC
CHARACTERISTICS
OUTPUT
Voltage 1
Current 1,2,3
Ripple Voltage 1,4
Power 1,2,3
REGULATION
Line 1,3
Load 1,3
SYMBOL
Condition
-55°C TC +125°C,
VIN = 28 VDC ±5%, CL=0,
unless otherwise specified
Group A
Subgroups
AHV2812T
Min Max
VOUT
IOUT
VRIP
POUT
VRLINE
VRLOAD
IOUT = 0 (main)
IOUT = 0 (dual)1
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 (main)
VIN = 16, 28, and 40 VDC (main)
(+dual)
(-dual)
(total)
VIN = 16, 28, and 40 VDC
IOUT = 0, 50%, and 100% load (main)
IOUT = 0, 50%, and 100% load (dual)
VIN = 16, 28, and 40 VDC
IOUT = 0, 50%, and 100% load (main)
IOUT = 0, 50%, and 100% load (dual)
1
2,3
1
2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
4.95
4.90
±11.88
±11.76
0.0
0.0
10
2.5
2.5
15
5.05
5.10
±12.12
±12.24
2000
±208
80
40
25
±60
50
±60
INPUT
Current
Ripple Current 4
EFFICIENCY
ISOLATION
Capacitive Load 6,7
Load Fault
Power Dissipation 3
Switching Frequency 1
IIN IOUT = 0, Inhibit (pin 8)
Tied to input return (pin 10)
IOUT = 0
Inhibit (pin 2) = open
IRIP IOUT = 2000 mA (main)
IOUT = ±208mA (±12V)
IOUT = ±167mA (±15V)
BW = DC to 2MHz
EFF IOUT = 2000mA (main)
IOUT = ±208mA (±12V)
IOUT = ±167mA (±15V)
ISO Input to output or any pin to
case (except pin 7) at 500 VDC,
TC = +25°C
CL No effect on DC performance
TC = +25°C (main)
(dual)
PD Overload, TC = +25°C5
Short Circuit, TC = +25°C
FS IOUT = 2000mA (main)
IOUT = ±208mA (±12V)
IOUT = ±167mA (±15V)
1,2,3
1,2,3
1,2,3
1
1
4
1
1
4
15
50
50
72
100
500
200
8.5
8.5
450 550
AHV2815T
Min Max
Units
4.95
4.90
±14.85
±14.70
0.0
0.0
10
2.5
2.5
15
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
25 mV
±75 mV
50 mV
±75 mV
15 mA
50 mA
50 mAp-p
72 %
100 M
500 µF
200 µF
8.5 W
8.5 W
450 550 KHz
For Notes to Specifications, refer to page 5
4
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AHV28xx 전자부품, 판매, 대치품
AHV28XX Series
Application Information
Inhibit Function
Connecting the inhibit pin (Pin 2 of single and dual models,
pin 8 of triple models) to the input return (pin 10) will cause
the converter to shutdown and operate in a low power
standby mode. Power consumption in this mode is calcu-
lated by multiplying Vin times the input current inhibited,
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typically 225mW at Vin equal to 28 volts. The input current
inhibited is relatively constant with changes in Vin. The open
circuit inhibit pin voltage is typically 11.5 volts and can be
conveniently driven by an open collector driver. An internal
pull-up resistor enables the user to leave this pin floating if
the inhibit function is not used in their particular application.
All models use identical inhibit internal circuits. Forcing in-
hibit pin to any voltage between 0 and 6 volts will assure the
converter is inhibited. The input current to this pin is 500µA
maximum at Vpin2 = to 0 volts. The converter can be turned
on by opening Pin 2 or forcing a voltage from 10 to 50 volts.
Inhibit pin current from 10 to 50 volts is less than ±50µA.
EMI Filter
An optional EMI filter ( AFC461) will reduce the input ripple
current to levels below the limits imposed by MIL-STD-
461 CEO3.
The output voltage of the AHV28XXS can be adjusted
upward by connecting a resistor between the Output
Adjust (Pin 3) and the Output Common (Pin 4) as shown
in Table 1.
Table 1: Output Adjustment Resistor Values
* Resistance (Ohms)
Pin 3 to 4
None
390 K
145 K
63 K
22 K
0
Output Voltage Increase (%)
5V 12V 15V
0
+1.0%
+2.0%
+3.1%
+4.1%
+5.0%
0
+1.6%
+3.2%
+4.9%
+6.5%
+7.9%
0
+1.7%
+3.4%
+5.1%
+6.8%
+8.3%
* Output Adjust (Single Output Models Only)
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부품번호상세설명 및 기능제조사
AHV28xx

ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS

International Rectifier
International Rectifier

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