IRF AHP2812SYCH Hybrid - high reliability dc/dc converter Datasheet

PD-97181C
HYBRID - HIGH RELIABILITY
DC/DC CONVERTER
AHP270XXS SERIES
270V Input, Single Output
Description
The AHP Series of DC/DC converters feature high power
density without derating over the full military temperature
range. This series is offered as lower cost alternatives to
the legendary AFL series with improved performance for
new design applications. The AHPs are form, fit and
functional replacement to the AFL series. The new AHP
series offers a full compliment of single and dual output
voltages operating from nominal +28V or +270V inputs
with output power ranging from 66W to 120W. For
applications requiring higher output power, multiple
converters can be operated in parallel. The internal current
sharing circuits assure equal current distribution among
the paralleled converters. Same as the AFL, the AHP
series incorporates International Rectifier’s proprietary
magnetic pulse feedback technology providing optimum
dynamic line and load regulation response. This feedback
system samples the output voltage at the pulse width
modulator fixed clock frequency, nominally 550KHz.
Multiple converters can be synchronized to a system clock
in the 500KHz to 700KHz range or to the synchronization
output of one converter. Undervoltage lockout, primary
and secondary referenced inhibit, soft-start and load fault
protection are provided on all models. Also included is
input over-voltage protection, a new protection feature
unique to the AHP.
These converters are hermetically packaged in two
enclosure variations, utilizing copper core pins to minimize
resistive DC losses. Three lead styles are available, each
fabricated with International Rectifier’s rugged ceramic
lead-to-package seal assuring long term hermeticity in
the most harsh environments.
AHP
Features
n 160V To 400V Input Range
n 3.3V, 5V, 6V, 9V, 12V, 15V, 25V and 28V Outputs
Available
n High Power Density - up to 84W/in3
n Up To 120W Output Power
n Parallel Operation with Stress and Current Sharing
n Low Profile (0.380") Seam Welded Package
n Ceramic Feed thru Copper Core Pins
n High Efficiency - to 87%
n Full Military Temperature Range
n Continuous Short Circuit and Overload Protection
n Remote Sensing Terminals
n Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 60dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Dual Output Versions Available
n Standard Microcircuit Drawing Available
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. Contact IR Santa Clara for special
requirements.
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1
01/16/07
AHP270XXS Series
Specifications
A bso lu te M axim u m R ating s
Input voltage
-0.5V to +500V
S oldering temperature
300°C for 10 seconds
O perating case temperature
-55°C to +125°C
S torage case tem perature
-65°C to +135°C
Static Characteristics -55°C ≤ TCASE ≤ +125°C, 160 ≤ VIN ≤ 400 unless otherwise specified.
Group A
Subgroups
Parameter
Test Conditions
Note 6
INPUT VOLTAGE
OUTPUT VOLTAGE
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
Min
Nom
Max
Unit
160
270
400
V
3.27
4.95
5.94
8.91
11.88
14.85
24.75
27.72
3.30
5.00
6.00
9.00
12.00
15.00
25.00
28.00
3.33
5.05
6.06
9.09
12.12
15.15
25.25
28.28
VIN = 270 Volts, 100% Load
1
1
1
1
1
1
1
1
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
3.24
4.90
5.88
8.82
11.76
14.70
24.50
27.44
OUTPUT CURRENT
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
VIN = 160, 270, 400 Volts - Note 6
OUTPUT POWER
Note 6
3.36
5.10
6.12
9.18
12.24
15.30
25.50
28.56
20
16
13.5
10.0
9.0
8.0
4.0
4.0
66
80
81
90
108
120
100
112
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
V
A
W
µF
MAXIMUM CAPACITIVE LOAD
Note 1
10,000
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
VIN = 270 Volts, 100% Load–Notes1, 6
-0.015
+0.015
%/°C
-100
-10
+100
+10
mV
mV
-1.0
+1.0
%
OUTPUT VOLTAGE REGULATION
AHP27025S/ AHP27028S
Line
All Others
Line
Load
1, 2, 3
1, 2, 3
1, 2, 3
No Load, 50% Load, 100% Load
VIN = 160, 270, 400 Volts – Note10
For Notes to Specifications, refer to page 4
2
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AHP270XXS Series
Static Characteristics (Continued)
Parameter
OUTPUT RIPPLE VOLTAGE
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S/ AHP27028S
Group A
Subgroups
1,
1,
1,
1,
1,
1,
1,
2,
2,
2,
2,
2,
2,
2,
3
3
3
3
3
3
3
INPUT CURRENT
No Load
Inhibit 1
Inhibit 2
INPUT RIPPLE CURRENT
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S/ AHP27028S
1
2, 3
1, 2, 3
1, 2, 3
1,
1,
1,
1,
1,
1,
1,
2,
2,
2,
2,
2,
2,
2,
3
3
3
3
3
3
3
LOAD FAULT POWER DISSIPATION
Overload or Short Circuit
AHP27025S/ AHP27028S
ENABLE INPUTS (Inhibit Function)
Converter Off
Sink Current
Converter On
Sink Current
SW ITCHING FREQUENCY
SYNCHRONIZATION INPUT
Frequency Range
Pulse Amplitude, Hi
Pulse Amplitude, Lo
Pulse Rise Time
Pulse Duty Cycle
ISOLATION
2,
2,
2,
2,
2,
2,
2,
3
3
3
3
3
3
3
1, 2, 3
1, 2, 3
Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8
V IN = 270 Volts, 100% Load
Unit
30
30
35
40
45
50
100
mV pp
60
60
60
70
70
80
80
B.W. = 10MHz
mA
mA pp
- Note 5
V IN = 270 Volts
V IN = 270 Volts, 100% Load
Logical Low, Pin 4 or Pin 12
Note 1
Logical High, Pin 4 and Pin 12 - Note 9
Note 1
72
78
79
80
82
83
82
2.0
500
1, 2, 3
1, 2, 3
1, 2, 3
500
2.0
-0.5
Note 1
Note 1
Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
DEVICE WEIGHT
Slight Variations with Case Style
MTBF
MIL-HDBK-217F2, AIF @ T C = 40°C
550
20
%
33
W
%
0.8
100
50
100
V
µA
V
µA
600
KHz
700
10
0.8
100
80
KHz
V
V
ns
%
MΩ
100
85
300
125
125
76
82
83
84
85
87
85
-0.5
1, 2, 3
1
M ax
13
15
3.0
5.0
115
105
1, 2, 3
1,
1,
1,
1,
1,
1,
1,
Nom
V IN = 270 Volts
I OUT = 0
1
2, 3
EFFICIENCY
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
Min
V IN = 160, 270, 400 Volts, 100% Load,
BW = 10MHz
V OUT = 90% V NOM
CURRENT LIMIT POINT
Expressed as a Percentage
of Full Rated Load
Test Conditions
g
KHrs
For Notes to Specifications, refer to page 4
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3
AHP270XXS Series
Dynamic Characteristics -55°C ≤ TCASE ≤ +125°C, VIN = 270 Volts unless otherwise specified.
Param eter
Group A
Subgroups
Amplitude
Recovery
AHP27006S
Amplitude
Recovery
Amplitude
Recovery
AHP27009S
Amplitude
Recovery
Amplitude
Recovery
AHP27012S
Amplitude
Recovery
Amplitude
Recovery
AHP27015S
Amplitude
Recovery
Amplitude
Recovery
AHP27025S
Amplitude
Recovery
Amplitude
Recovery
AHP27028S
Amplitude
Recovery
Amplitude
Recovery
Nom
Max
Unit
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-450
450
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-450
450
400
mV
µs
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-450
450
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-450
450
400
mV
µs
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-600
600
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-600
600
400
mV
µs
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-750
750
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-750
750
400
mV
µs
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-900
900
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-900
900
400
mV
µs
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-1200
1200
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-1200
1200
400
mV
µs
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-1200
1200
200
mV
µs
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-1200
1200
400
mV
µs
-500
500
500
mV
µs
10
120
%
ms
Notes 1, 2, 3
LINE TRANSIENT RESPONSE
V IN Step = 160 ⇔ 400 Volts
Amplitude
Recovery
Note 4
TURN-ON CHARACTERISTICS
Overshoot
Delay
Min
Notes 2, 8
LOAD TRANSIENT RESPONSE
AHP27003R3S / AHP27005S
Amplitude
Recovery
Test Conditions
4, 5, 6
4, 5, 6
Enable 1, 2 on. (Pins 4, 12 high or
open)
LOAD FAULT RECOVERY
Same as Turn On Characteristics.
LINE REJECTION
MIL-STD-461, CS101, 30Hz to 50KHz
Note 1
50
5.0
75
60
70
dB
Notes to Specifications:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Parameters not 100% tested but are guaranteed to the limits specified in the table.
Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0 % of VOUT at 50% load.
Line transient transition time ≥100µs.
Turn-on delay is measured with an input voltage rise time of between 100V and 500V per ms.
Current limit point is that condition of excess load causing output voltage to drop to 90% of nominal.
Parameter verified as part of another test.
All electrical tests are performed with the remote sense leads connected to the output leads at the load.
Load transient transition time ≥10µs.
Enable inputs internally pulled high. Nominal open circuit voltage ≈ 4.0VDC.
All tests at no-load are performed after start-up of the converter.
The converter may fail to start when the output load is less than 1.0W. Under these circumstances,
the converter’s start-up circuitry will continue to cycle until an adequate load is present.
4
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AHP270XXS Series
Circuit Description
Figure I. Single Output Block Diagram
+ INPUT
1
ENABLE 1
4
INPUT
FILTER
OUTPUT
FILTER
PRIMARY
BIAS SUPPLY
7
+ OUTPUT
10
+ SENSE
11
SHARE
12
ENABLE 2
9
SENSE RETURN
8
OUTPUT RETURN
CURRENT
SENSE
SYNC OUTPUT
5
SHARE
CONTROL
SYNC INPUT
6
CASE
3
INPUT RETURN
ERROR
AMP
& REF
AMPLIFIER
SENSE
AMPLIFIER
2
Circuit Operation and Application Information
The AHP series of converters employ a forward switched
mode converter topology. (refer to Figure I.) Operation of
the device is initiated when a DC voltage whose magnitude
is within the specified input limits is applied between pins 1
and 2. If pin 4 is enabled (at a logical 1 or open) the primary
bias supply will begin generating a regulated housekeeping
voltage bringing the circuitry on the primary side of the
converter to life. Two power MOSFETs used to chop the
DC input voltage into a high frequency square wave, apply
this chopped voltage to the power transformer. As this
switching is initiated, a voltage is impressed on a second
winding of the power transformer which is then rectified and
applied to the primary bias supply. When this occurs, the
input voltage is shut out and the primary bias voltage
becomes exclusively internally generated.
The switched voltage impressed on the secondary output
transformer winding is rectified and filtered to provide the
converter output voltage. An error amplifier on the secondary
side compares the output voltage to a precision reference
and generates an error signal proportional to the difference.
This error signal is magnetically coupled through the
feedback transformer into the controller section of the
converter varying the pulse width of the square wave signal
driving the MOSFETs, narrowing the width if the output
voltage is too high and widening it if it is too low.
leads should be connected to their respective output
terminals at the converter. Figure III. illustrates a typical
application.
Inhibiting Converter Output
As an alternative to application and removal of the DC
voltage to the input, the user can control the converter
output by providing TTL compatible, positive logic signals
to either of two enable pins (pin 4 or 12). The distinction
between these two signal ports is that enable 1 (pin 4) is
referenced to the input return (pin 2) while enable 2 (pin 12)
is referenced to the output return (pin 8). Thus, the user
has access to an inhibit function on either side of the isolation
barrier. Each port is internally pulled “high” so that when
not used, an open connection on both enable pins permits
normal converter operation. When their use is desired, a
logical “low” on either port will shut the converter down.
Figure II. Enable Input Equivalent Circuit
+5.6V
Pin 4 or
Pin 12
Remote Sensing
Connection of the + and - sense leads at a remotely located
load permits compensation for resistive voltage drop between
the converter output and the load when they are physically
separated by a significant distance. This connection allows
regulation to the placard voltage at the point of application.
When the remote sensing feature is not used, the sense
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1N4148
100K
Disable
290K
2N3904
150K
Pin 2 or
Pin 8
5
AHP270XXS Series
Internally, these ports differ slightly in their function. In use,
a low on Enable 1 completely shuts down all circuits in the
converter while a low on Enable 2 shuts down the secondary
side while altering the controller duty cycle to near zero.
Externally, the use of either port is transparent save for
minor differences in idle current. (See specification table).
Synchronization of Multiple Converters
than 100ns, maximum low level of +0.8V and a minimum high
level of +2.0V. The sync output of another converter which
has been designated as the master oscillator provides a
convenient frequency source for this mode of operation.
When external synchronization is not required, the sync in
pin should be left unconnected thereby permitting the
converter to operate at its own internally set frequency.
The sync output signal is a continuous pulse train set at
550 ± 50KHz, with a duty cycle of 15 ± 5%. This signal is
referenced to the input return and has been tailored to be
compatible with the AFL sync input port. Transition times
are less than 100ns and the low level output impedance is
less than 50Ω. This signal is active when the DC input
voltage is within the specified operating range and the
converter is not inhibited. This output has adequate drive
reserve to synchronize at least five additional converters.
A typical synchronization connection option is illustrated in
Figure III.
When operating multiple converters, system requirements
often dictate operation of the converters at a common
frequency. To accommodate this requirement, the AHP
series converters provide both a synchronization input and
output.
The sync input port permits synchronization of an AHP
converter to any compatible external frequency source
operating between 500KHz and 700KHz. This input signal
should be referenced to the input return and have a 10% to
90% duty cycle. Compatibility requires transition times less
Figure III. Preferred Connection for Parallel Operation
Power
Input
1
Vin
Enable 2
Rtn
Share
Case
Enable 1
Optional
Synchronization
Connection
AHP
12
+ Sense
- Sense
Sync Out
Return
Sync In
+ Vout
7
6
Share
Bus
1
12
Vin
Enable 2
Rtn
Share
Case
Enable 1
AHP
+ Sense
- Sense
Sync Out
Return
Sync In
+ Vout
6
1
Enable 2
Vin
Rtn
AHP
Case
to Load
7
12
Share
+ Sense
Enable 1
- Sense
Sync Out
Return
Sync In
+ Vout
6
7
(Other Converters)
Parallel Operation-Current and Stress Sharing
Figure III. illustrates the preferred connection scheme for
operation of a set of AHP converters with outputs operating
in parallel. Use of this connection permits equal sharing of a
load current exceeding the capacity of an individual AHP
among the members of the set. An important feature of the
6
AHP series operating in the parallel mode is that in addition
to sharing the current, the stress induced by temperature
will also be shared. Thus if one member of a paralleled set
is operating at a higher case temperture, the current it
provides to the load will be reduced as compensation for
the temperature induced stress on that device.
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AHP270XXS Series
When operating in the shared mode, it is important that
symmetry of connection be maintained as an assurance of
optimum load sharing performance. Thus, converter outputs
should be connected to the load with equal lengths of wire of
the same gauge and sense leads from each converter should
be connected to a common physical point, preferably at the
load along with the converter output and return leads. All
converters in a paralleled set must have their share pins
connected together. This arrangement is diagrammatically
illustrated in Figure III. showing the outputs and sense pins
connected at a star point which is located as close as
possible to the load.
As a consequence of the topology utilized in the current
sharing circuit, the share pin may be used for other functions.
In applications requiring a single converter, the voltage
appearing on the share pin may be used as a “current
monitor”. The share pin open circuit voltage is nominally
+1.00V at no load and increases linearly with increasing
output current to +2.20V at full load. The share pin voltage
is referenced to the output return pin.
Thermal Considerations
Because of the incorporation of many innovative
technological concepts, the AHP series of converters is
capable of providing very high output power from a package
of very small volume. These magnitudes of power density
can only be obtained by combining high circuit efficiency
with effective methods of heat removal from the die junctions.
This requirement has been effectively addressed inside the
device; but when operating at maximum loads, a significant
amount of heat will be generated and this heat must be
conducted away from the case. To maintain the case
temperature at or below the specified maximum of 125°C,
this heat must be transferred by conduction to an
appropriate heat dissipater held in intimate contact with the
converter base-plate.
Because effectiveness of this heat transfer is dependent
on the intimacy of the baseplate/heatsink interface, it is
strongly recommended that a high thermal conductivity heat
transferance medium is inserted between the baseplate
and heatsink. The material most frequently utilized at the
factory during all testing and burn-in processes is sold under
the trade name of Sil-Pad® 4001 . This particular pro duct is
an insulator but electrically conductive versions are also
available. Use of these materials assures maximum surface
contact with the heat dissipator thereby compensating for
minor variations of either surface. While other available types
of heat conductive materials and compounds may provide
similar performance, these alternatives are often less
convinient and are frequently messy to use.
A conservative aid to estimating the total heat sink surface
area (A HEAT SINK ) required to set the maximum case
temperature rise (∆T) above ambient temperature is given
by the following expression:
.
⎧ ∆T ⎫ −143
⎬
A HEAT SINK ≈ ⎨
− 3.0
⎩ 80P 0.85 ⎭
where
∆T = Case temperature rise above ambient
⎧ 1
⎫
− 1⎬
P = Device dissipation in Watts = POUT ⎨
⎩ Eff
⎭
As an example, it is desired to maintain the case temperature
of an AHP27015S at ≤ +85°C in an area where the ambient
temperature is held at a constant +25°C; then
∆T = 85 - 25 = 60°C
From the Specification Table, the worst case full load
efficiency for this device is 83%; therefore the power
dissipation at full load is given by
⎧ 1
⎫
P = 120 • ⎨
− 1⎬ = 120 • ( 0.205) = 24.6W
⎩ .83 ⎭
and the required heat sink area is
⎫ −1.43
⎧
60
⎬
− 3.0 = 71 in2
A HEAT SINK = ⎨
⎩ 80 • 24.6 0.85 ⎭
Thus, a total heat sink surface area (including fins, if any) of
71 in2 in this example, would limit case rise to 60°C above
ambient. A flat aluminum plate, 0.25" thick and of approximate
dimension 4" by 9" (36 in2 per side) would suffice for this
application in a still air environment. Note that to meet the
criteria in this example, both sides of the plate require
unrestricted exposure to the ambient air.
1Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
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7
AHP270XXS Series
Input Filter
The AHP270XXS series converters incorporate a single
stage LC input filter whose elements dominate the input
load impedance characteristic during the turn-on sequence.
The input circuit is as shown in Figure IV.
Figure IV. Input Filter Circuit
8.4µH
For (V NOM + 0.25V) < V OUT < (V NOM + 0.5V), a resistor is
connected between the +Sense and –Sense pins with
the –Sense connected to the output return as shown in
Figure V. The resistor value (RADJ) is calculated as
follows:
⎡
⎤
V NOM
R ADJ = 1000 ⋅ ⎢
⎥
⎣VOUT − V NOM − 0.25 ⎦
Pin 1
0.54µfd
Pin 2
Input Overvoltage Protection
One additional protection feature is incorporated into the
AHP input circuit is input over-voltage protection. The
converter will shutdown at approximately 110% of the
maximum rated input voltage and restart once the input
voltage drops back below this threshold.
Undervoltage Lockout
A minimum voltage is required at the input of the converter
to initiate operation. This voltage is set to 150V ± 5V. To
preclude the possibility of noise or other variations at the
input falsely initiating and halting converter operation, a
hysteresis of approximately 10V is incorporated in this circuit.
Thus if the input voltage droops to 140V ± 5V, the converter
will shut down and remain inoperative until the input voltage
returns to ≈ 150V.
Output Voltage Adjust
In addition to permitting close voltage regulation of remotely
located loads, it is possible to utilize the converter sense
pins to incrementally increase the output voltage over a
limited range. The adjustments made possible by this
method are intended as a means to “trim” the output to a
voltage setting for some particular application, but are not
intended to create an adjustable output converter. These
output voltage setting variations are obtained by connecting
an appropriate resistor value in the locations as shown in
Figure V or Figure VI depending on the desired output
voltage. The range of adjustment and corresponding range
of resistance values can be determined by use of the
equations presented below.
8
For VNOM < VOUT < (VNOM + 0.25V), a resistor is connected
between the +Sense and +Output pins with the –Sense
connected to the output return as shown in Figure VI.
The resistor value (RADJ ) is calculated as follows:
R ADJ =
1000
⎛
⎞
0.25
⎜⎜
− 1⎟⎟
⎝ VOUT − V NOM
⎠
VNOM = device nominal output voltage
VOUT = desired output voltage
RADJ = value of the external resistor required to
achieve the desired Vout
Finding a resistor value for a particular output voltage, is
simply a matter of substituting the desired output voltage
and the nominal device voltage into the equation and solving
for the corresponding resistor value.
Figure V. Connection for VOUT > VNOM+ 0.25V
Enable 2
Share
AHP270XXS
+Sense
RADJ
- Sense
Return
+Vout
To Load
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AHP270XXS Series
Figure VI. Connection for VNOM< VOUT < (VNOM+ 0.25V)
Enable 2
Share
AHP270XXS
+Sense
RADJ
- Sense
Return
+Vout
To Load
Attempts to adjust the output voltage to a value greater than
120% of nominal should be avoided because of the potential
of exceeding internal component stress ratings and
subsequent operation to failure. Under no circumstance
should the external setting resistor be made less than 500Ω.
By remaining within this specified range of values, completely
safe operation fully within normal component derating is
assured.
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Examination of the equation relating output voltage and
resistor value reveals a special benefit of the circuit topology
utilized for remote sensing of output voltage in the
AHP270XXS series of converters. It is apparent that as the
resistance increases, the output voltage approaches the
nominal set value of the device. In fact the calculated limiting
value of output voltage as the adjusting resistor becomes
very large is ≅ 250mV above nominal device voltage.
The consequence is that if the +sense connection is
unintentionally broken, an AHP270XXS has a fail-safe output
voltage of Vout + 250mV, where the 250mV is independent
of the nominal output voltage. It can be further demonstrated
that in the event of both the + and - sense connections
being broken, the output will be limited to Vout + 500mV.
This 500mV is also essentially constant independent of the
nominal output voltage. While operation in this condition is
not damaging to the device, not all performance parameters
will be met.
9
AHP270XXS Series
Mechanical Outlines
Case X
Case W
Pin Variation of Case Y
3.000
ø 0.128
2.760
0.050
0.050
1
12
0.250
0.250
1.000
Ref
0.200 Typ
Non-cum
6
7
1.260 1.500
1.000
Pin
ø 0.040
0.220
2.500
0.220
Pin
ø 0.040
2.800
2.975 max
0.525
0.238 max
0.42
0.380
Max
0.380
Max
Case Y
Case Z
Pin Variation of Case Y
0.300
1.150
ø 0.140
0.25 typ
0.050
0.050
1
12
0.250
0.250
1.000
Ref
6
1.750
1.000
Ref
0.200 Typ
Non-cum
7
1.500 1.750 2.00
Pin
ø 0.040
0.375
Pin
ø 0.040
0.220
0.220
0.36
2.500
2.800
2.975 max
0.525
0.238 max
0.380
Max
0.380
Max
Tolerances, unless otherwise specified:
.XX
.XXX
=
=
±0.010
±0.005
BERYLLIA WARNING: These converters are hermetically sealed; however they contain BeO substrates and should not be ground or subjected to any
other operations including exposure to acids, which may produce Beryllium dust or fumes containing Beryllium
10
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AHP270XXS Series
Pin Designation
Pin #
Designation
1
+ Input
2
Input Return
3
Case
4
Enable 1
5
Sync Output
6
Sync Input
7
+ Output
8
Output Return
9
Sense Return
10
+ Sense
11
Share
12
Enable 2
Standard Microcircuit Drawing Equivalence Table
www.irf.com
Standardized Military Drawing
Pin
Vendor Cage
Code
Vendor Similar
Pin
5962-0623101
52467
AHP27025S
11
AHP270XXS Series
Device Screening
Requirement
MIL-STD-883 Method
Temperature Range
Element Evaluation
No Suffix
ES
d
-20°C to +85°C -55°C to +125°C
HB
e -55°C to +125°C
CH
-55°C to +125°C
MIL-PRF-38534
N/A
N/A
N/A
Class H
2023
N/A
N/A
N/A
N/A
Internal Visual
2017
c
Yes
Yes
Yes
Temperature Cycle
1010
N/A
Cond B
Cond C
Cond C
Constant Acceleration
2001, Y1 Axis
N/A
500 Gs
3000 Gs
3000 Gs
PIND
2020
N/A
N/A
N/A
N/A
48 [email protected] temp
Non-Destructive
Bond Pull
Burn-In
1015
N/A
Final Electrical
MIL-PRF-38534
25°C
( Group A )
& Specification
25°C
d
160 [email protected]°C 160 [email protected]°C
-55°C, +25°C,
-55°C, +25°C,
+125°C
+125°C
PDA
MIL-PRF-38534
N/A
N/A
N/A
10%
Seal, Fine and Gross
1014
Cond A
Cond A, C
Cond A, C
Cond A, C
Radiographic
2012
N/A
N/A
N/A
N/A
External Visual
2009
Yes
Yes
Yes
c
Notes:
 Best commercial practice
‚ Sample tests at low and high temperatures
ƒ -55°C to +105°C for AHE, ATO, ATW
Part Numbering
AHP 270 05 S X ES
Model
Screening Level
(Please refer to Screening Table)
Input Voltage
No Suffix, ES, HB, CH
28 = 28V
270 = 270V
Case Style
Output Voltage
Output
3R3 = 3.3V, 05 = 5V
06 = 6V, 09 = 9V
12 = 12V, 15 = 15V
25 = 25V, 28 = 28V
W, X, Y, Z
S = Single
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
12
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