AHP27025SXCH [INFINEON]
HYBRID - HIGH RELIABILITY DC/DC CONVERTER; 混合 - 高可靠性DC / DC转换器
| 型号： | AHP27025SXCH |
| 厂家： | 
Infineon |
| 描述： | HYBRID - HIGH RELIABILITY DC/DC CONVERTER |
| 文件： | 总12页 (文件大小：190K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PD-97181C
AHP270XXS SERIES
270V Input, Single Output
HYBRID - HIGH RELIABILITY
DC/DC CONVERTER
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.
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/in
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
3
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.
n Dual Output Versions Available
n Standard Microcircuit Drawing Available
Manufactured in a facility fully qualified to MIL-PRF-
38534, 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
Absolute Maximum Ratings
Input voltage
-0.5V to +500V
Soldering temperature
300°C for 10 seconds
-55°C to +125°C
-65°C to +135°C
Operating case temperature
Storage case temperature
Static Characteristics
≤
≤
≤
≤
-55°C TCASE +125°C, 160 VIN 400 unless otherwise specified.
Group A
Subgroups
Parameter
INPUT VOLTAGE
Test Conditions
Min
Nom
Max
Unit
Note 6
160
270
400
V
V
= 270 Volts, 100% Load
OUTPUT VOLTAGE
IN
1
1
1
1
1
1
1
1
3.27
4.95
5.94
3.30
5.00
6.00
3.33
5.05
6.06
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
8.91
9.00
9.09
11.88
14.85
24.75
27.72
12.00
15.00
25.00
28.00
12.12
15.15
25.25
28.28
V
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
3.36
5.10
6.12
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
9.18
12.24
15.30
25.50
24.50
27.44
28.56
OUTPUT CURRENT
V
= 160, 270, 400 Volts - Note 6
IN
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
20
16
13.5
10.0
9.0
8.0
4.0
4.0
A
Note 6
OUTPUT POWER
66
80
81
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
90
108
120
100
112
W
Note 1
10,000
µF
MAXIMUM CAPACITIVE LOAD
V
= 270 Volts, 100% Load–Notes1, 6 -0.015
+0.015
%/°C
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
IN
OUTPUT VOLTAGE REGULATION
1, 2, 3
1, 2, 3
No Load, 50% Load, 100% Load
= 160, 270, 400 Volts – Note10
-100
-10
+100
+10
mV
mV
AHP27025S/ AHP27028S
All Others
Line
Line
V
IN
1, 2, 3
-1.0
+1.0
%
Load
For Notes to Specifications, refer to page 4
2
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AHP270XXS Series
Static Characteristics (Continued)
Group A
Parameter
Subgroups
Test Conditions
Min
Nom
Max
Unit
V
= 160, 270, 400 Volts, 100% Load,
OUTPUT RIPPLE VOLTAGE
IN
AHP27003R3S
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
30
30
35
40
45
BW = 10MHz
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
mV
pp
50
100
AHP27025S/ AHP27028S
V
= 270 Volts
INPUT CURRENT
IN
1
2, 3
13
15
No Load
I
= 0
OUT
1, 2, 3
1, 2, 3
3.0
5.0
mA
Inhibit 1
Inhibit 2
Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8
V
= 270 Volts, 100% Load
INPUT RIPPLE CURRENT
IN
B.W. = 10MHz
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
60
60
60
70
70
80
80
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
mA
pp
AHP27025S/ AHP27028S
V
= 90% V
- Note 5
CURRENT LIMIT POINT
OUT
NOM
1
2, 3
115
105
125
125
Expressed as a Percentage
of Full Rated Load
%
W
VIN = 270 Volts
LOAD FAULT POWER DISSIPATION
Overload or Short Circuit
1, 2, 3
33
EFFICIENCY
AHP27003R3S
AHP27005S
AHP27006S
AHP27009S
AHP27012S
AHP27015S
VIN = 270 Volts, 100% Load
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
72
78
79
80
82
83
82
76
82
83
84
85
87
85
%
AHP27025S/ AHP27028S
ENABLE INPUTS (Inhibit Function)
Converter Off
1, 2, 3
1, 2, 3
Logical Low, Pin 4 or Pin 12
Note 1
Logical High, Pin 4 and Pin 12 - Note 9
Note 1
-0.5
2.0
0.8
100
50
V
µA
V
Sink Current
Converter On
Sink Current
100
µA
1, 2, 3
500
550
600
KHz
SWITCHING FREQUENCY
SYNCHRONIZATION INPUT
Frequency Range
1, 2, 3
1, 2, 3
1, 2, 3
500
2.0
-0.5
700
10
0.8
100
80
KHz
V
V
ns
%
Pulse Amplitude, Hi
Pulse Amplitude, Lo
Pulse Rise Time
Note 1
Note 1
20
Pulse Duty Cycle
ISOLATION
1
Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
100
MΩ
Slight Variations with Case Style
85
g
DEVICE WEIGHT
MTBF
MIL-HDBK-217F2, AIF @ T = 40°C
C
300
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.
Group A
Parameter
Subgroups
Test Conditions
Notes 2, 8
Min
Nom
Max
Unit
LOAD TRANSIENT RESPONSE
AHP27003R3S / AHP27005S
Amplitude
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
Load Step 10% ⇔ 50%
Load Step 50% ⇔ 100%
Load Step 10% ⇔ 50%
-450
-450
-450
-450
-600
-600
-750
-750
-900
-900
-1200
-1200
450
200
mV
µs
Recovery
Amplitude
Recovery
4, 5, 6
4, 5, 6
450
400
mV
µs
AHP27006S
AHP27009S
AHP27012S
AHP27015S
AHP27025S
AHP27028S
Amplitude
Recovery
4, 5, 6
4, 5, 6
450
200
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
450
400
mV
µs
Amplitude
Recovery
⇔
4, 5, 6
4, 5, 6
Load Step 50%
100%
600
200
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
Load Step 50% ⇔ 100%
Load Step 10% ⇔ 50%
Load Step 50% ⇔ 100%
Load Step 10% ⇔ 50%
Load Step 50% ⇔ 100%
600
400
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
750
200
mV
µ
s
Amplitude
Recovery
4, 5, 6
4, 5, 6
750
400
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
900
200
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
900
400
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
1200
200
mV
µs
Amplitude
Recovery
⇔
4, 5, 6
4, 5, 6
Load Step 10%
50%
1200
400
mV
µs
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
Load Step 10% ⇔ 50%
1200
200
mV
µs
-1200
-1200
Amplitude
Recovery
4, 5, 6
4, 5, 6
1200
400
mV
µ
s
Notes 1, 2, 3
LINE TRANSIENT RESPONSE
Amplitude
Recovery
-500
500
500
mV
µs
V
Step = 160 ⇔ 400 Volts
IN
TURN-ON CHARACTERISTICS
Note 4
Overshoot
Delay
4, 5, 6
4, 5, 6
Enable 1, 2 on. (Pins 4, 12 high or
open)
5.0
75
10
120
%
ms
50
60
Same as Turn On Characteristics.
LOAD FAULT RECOVERY
LINE REJECTION
MIL-STD-461, CS101, 30Hz to 50KHz
Note 1
70
dB
Notes to Specifications:
1.
2.
3.
4.
5.
6.
7.
8.
9.
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.
10. 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
FILTER
+ INPUT
1
4
OUTPUT
FILTER
PRIMARY
BIAS SUPPLY
+ OUTPUT
+ SENSE
7
ENABLE 1
10
CURRENT
SENSE
SYNC OUTPUT
5
SHARE
11
12
SHARE
CONTROL
AMPLIFIER
ERROR
AMP
& REF
SYNC INPUT
CASE
6
3
2
ENABLE 2
SENSE
AMPLIFIER
9
8
SENSE RETURN
OUTPUT RETURN
INPUT RETURN
Circuit Operation and Application Information
leads should be connected to their respective output
terminals at the converter. Figure III. illustrates a typical
application.
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.
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.
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.
Figure II. Enable Input Equivalent Circuit
+5.6V
100K
1N4148
Pin 4 or
Pin 12
Disable
290K
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
2N3904
150K
Pin 2 or
Pin 8
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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).
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.
Synchronization of Multiple Converters
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
1
12
Power
Input
Enable 2
Vin
Rtn
Share
+ Sense
- Sense
Return
+ Vout
Case
AHP
AHP
AHP
Enable 1
Sync Out
Sync In
7
6
1
Optional
Synchronization
Connection
Share
Bus
12
Enable 2
Share
Vin
Rtn
Case
+ Sense
- Sense
Return
+ Vout
Enable 1
Sync Out
Sync In
to Load
7
6
1
12
Enable 2
Share
Vin
Rtn
Case
+ Sense
- Sense
Return
+ Vout
Enable 1
Sync Out
Sync In
7
6
(Other Converters)
Parallel Operation-Current and Stress Sharing
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.
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
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AHP270XXS Series
minor variations of either surface. While other available types
When operating in the shared mode, it is important that
symmetry of connection be maintained as an assurance of of heat conductive materials and compounds may provide
optimum load sharing performance. Thus, converter outputs similar performance, these alternatives are often less
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.
convinient and are frequently messy to use.
A conservative aid to estimating the total heat sink surface
area (AHEAT SINK) required to set the maximum case
temperature rise (∆T) above ambient temperature is given
by the following expression:
−1.43
⎧
⎨
⎩
⎫
⎬
⎭
∆T
A
HEAT SINK
≈
− 3.0
0.85
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.
80P
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
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.
∆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
⎬ ( )
−1 = 120• 0.205 = 24.6W
P = 120•
⎩.83
and the required heat sink area is
−1.43
⎧
⎨
⎩
⎫
⎬
⎭
60
A
HEAT SINK
=
− 3.0 = 71 in2
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
0.85
80 • 24.6
Thus, a total heat sink surface area (including fins, if any) of
2
71 in 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 in per side) would suffice for this
2
1
the trade name of Sil-Pad® 400 . This particular pro duct is
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.
an insulator but electrically conductive versions are also
available. Use of these materials assures maximum surface
contact with the heat dissipator thereby compensating for
1
Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
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7
AHP270XXS Series
Input Filter
For (VNOM + 0.25V) < VOUT < (VNOM + 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:
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.
⎡
⎢
⎣
⎤
⎥
⎦
VNOM
Figure IV. Input Filter Circuit
RADJ = 1000⋅
VOUT −VNOM − 0.25
8.4µH
Pin 1
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:
0.54µfd
Pin 2
1000
RADJ
=
Input Overvoltage Protection
⎛
⎞
0.25
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.
⎜
⎜
⎟
⎟
− 1
VOUT −VNOM
⎝
⎠
VNOM = device nominal output voltage
VOUT = desired output voltage
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.
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.
Output Voltage Adjust
Figure V. Connection for VOUT > VNOM+ 0.25V
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.
Enable 2
Share
RADJ
+Sense
AHP270XXS
- Sense
Return
To Load
+Vout
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AHP270XXS Series
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.
Figure VI. Connection for VNOM< VOUT < (VNOM+ 0.25V)
Enable 2
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RADJ
+Sense
AHP270XXS
- Sense
Return
To Load
+Vout
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.
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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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
0.250
0.250
1.000
1.000
Ref
1.260 1.500
0.200 Typ
Non-cum
Pin
ø 0.040
Pin
ø 0.040
0.220
2.500
0.220
0.525
2.800
2.975 max
0.238 max
0.42
0.380
Max
0.380
Max
Case Y
Case Z
Pin Variation of Case Y
0.300
ø 0.140
1.150
0.25 typ
0.050
0.050
0.250
0.250
1.000
Ref
1.500 1.750 2.00
1.000
Ref
0.200 Typ
Non-cum
Pin
ø 0.040
Pin
ø 0.040
0.220
0.220
1.750
2.500
0.375
0.36
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
Designation
Pin #
1
2
+ Input
Input Return
Case
3
4
Enable 1
5
Sync Output
Sync Input
+ Output
6
7
8
Output Return
Sense Return
+ Sense
9
10
11
12
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Standard Microcircuit Drawing Equivalence Table
Standardized Military Drawing Vendor Cage
Vendor Similar
Pin
Code
Pin
5962-0623101
52467
AHP27025S
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11
AHP270XXS Series
Device Screening
Requirement
MIL-STD-883 Method No Suffix
ES
HB
CH
Temperature Range
Element Evaluation
Non-Destructive
Bond Pull
-20°C to +85°C -55°C to +125°C
-55°C to +125°C -55°C to +125°C
MIL-PRF-38534
2023
N/A
N/A
N/A
N/A
Class H
N/A
N/A
N/A
Internal Visual
Temperature Cycle
Constant Acceleration
PIND
2017
1010
Yes
Cond B
500 Gs
N/A
Yes
Cond C
3000 Gs
N/A
Yes
Cond C
3000 Gs
N/A
N/A
N/A
2001, Y1 Axis
2020
N/A
Burn-In
1015
N/A
48 hrs@hi temp 160 hrs@125°C 160 hrs@125°C
Final Electrical
( Group A )
MIL-PRF-38534
& Specification
MIL-PRF-38534
1014
25°C
25°C
-55°C, +25°C,
+125°C
N/A
-55°C, +25°C,
+125°C
10%
PDA
N/A
Cond A
N/A
N/A
Cond A, C
N/A
Seal, Fine and Gross
Radiographic
External Visual
Cond A, C
N/A
Cond A, C
N/A
2012
2009
Yes
Yes
Yes
Notes:
Best commercial practice
Sample tests at low and high temperatures
-55°C to +105°C for AHE, ATO, ATW
Part Numbering
AHP 270 05 S X ES
Screening Level
(Please refer to Screening Table)
Model
No Suffix, ES, HB, CH
Input Voltage
28 = 28V
270 = 270V
Case Style
W, X, Y, Z
Output Voltage
3R3 = 3.3V, 05 = 5V
06 = 6V, 09 = 9V
Output
S = Single
12 = 12V, 15 = 15V
25 = 25V, 28 = 28V
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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