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PD - 94583
AHV28XX SERIES
28V Input, Single, Dual and Triple Output
ADVANCED ANALOG 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 applications 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 rugged, 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 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 11.5volt 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-PRF38534, these converters are available in four screening grades to satisfy a wide range of requirements.
AHV Features
n n n n n n n n n n n n n 80 Transient Input (100 msec max.) 50 VDC Input (Continous) 16 to 40 VDC Input Range Single, Dual and Triple Outputs 15 Watts 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)
The CH grade is fully compliant to the requirements 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., element 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 screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog for special requirements.
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11/20/02
AHV28XX Series
Specifications (Single Output Models)
TCASE = -55C to +125C, 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 300C for 10 seconds (1 pin at a time) Temperature Range Operating -55C to +135C Storage -65C to +135C
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TEST STATIC CHARACTERISTICS OUTPUT Voltage Current Ripple Voltage1 Power REGULATION Line Load INPUT Current Ripple Current EFFICIENCY ISOLATION SYMBOL Condition -55C TC +125C, 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
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 = +25C Input to output or any pin to case (except pin 8) at 500 VDC TC = +25C No effect on DC performance TC = +25C Overload, TC = +25C4 Short Circuit, TC = +25C IOUT = Full Load
1 2,3 1,2,3 1,2,3 1,2,3 1 2,3 1,2,3
4.95 4.90 0.0
5.05 5.10 3.00 60
11.88 11.76 0.0
12.12 12.24 1.25 60
14.85 14.70 0.0
15.15 15.30 1.00 60
V V A mVp-p W
15 5 25 50
15 30 60 120
15 35 75 150
mV mV mV
IIN IRIP EFF ISO
1,2,3 1,2,3, 1 1
18 50 50 72 100 72 100
18 50 50 72 100
18 50 50
mA mA mAp-p % M
Capacitive Load 2,3 Load Fault Power Dissipation Switching Frequency
CL PD
4
500
200
200
F W W KHz
1
8.5 8.5 450 550 450
8,5 8.5 550 450
8.5 8.5 550
FS DYNAMIC CHARACTERISTICS Step Load Changes Output Transient5 Recovery
5,6
4
VOTLOAD TTLOAD
50% Load 135 100% Load No Load 135 50% 50% Load 135 100% No Load 335 50% Load 50% Load 335 No lLoad 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 IOUT = OA and Full Load IOUT = O 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 5 300 -1000 800 800 550 10 10
-300 -750
+300 +750 70 1500 5 500 -1500 800 800 750 10 10
-300 -750
+300 +750 70 1500 5 500 -1500 800 800 750 10 10
mVpk mVpk s s ms mVpk mVpk s s mVpk ms ms
Step Line Changes Output Transient Recovery TURN-ON Overshoot Delay Load Fault Recovery
VOTLINE TTLINE
VTonos T on D TRLF
Notes to Specifications (Single Output Models)
1. Bandwidth guaranteed by design. Tested for 20 KHz to 2 MHz. 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 2 to 10 microseconds. 6. Recovery time is measured from the initiation of the transient to where VOUT has returned to within 1 percent of VOUT at 50 percent load. 7. Input step transition time between 2 and 10 microseconds. 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 125C case temperature, derate output power linearly to 0 at 135C case.
2
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AHV28XX Series
Specifications (Dual Output Models)
TCASE = -55C to +125C, 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 300C for 10 seconds (1 pin at a time) Temperature Range Operating -55C to +135C Storage -65C to +135C
Condition -55C TC +125C, VIN = 28 VDC 5%, CL=0, unless otherwise specified
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TEST STATIC CHARACTERISTICS OUTPUT 1 Voltage Current 1,3 Ripple Voltage Power REGULATION 1,5 Line Load
1 1,2,4 1,2
SYMBOL
Group A Subgroups
AHV2812D Min Max
AHV2815D Min Max Units
VOUT IOUT VRIP POUT VRLINE IOUT VRLOAD IIN
IOUT = 0 VIN = 16, 28, and 40 VDC VIN = 16, 28, and 40 VDC BW = DC to 2 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) Tied to input return (pin 10) IOUT = 0, Inhibit (pin 2) = Open IOUT = Full load BW = DC to 2MHz IOUT = Full Load TC = +25C Input to output or any pin to case (except pin 8) at 500 VDC, TC = +25C No effect on DC performance TC = +25C Overload, TC = +25C Short Circuit, TC = +25C IOUT = Full Load
8
1 2,3 1,2,3 1,2,3 1,2,3 1 2,3 1,2,3
11.88 11.76 0.0
12.12 12.24 625 60
14.85 14.70 0.0
15.15 15.30 500 60
V V mA mVp-p W
15 30 60 120
15 35 75 150
mV mV mV
INPUT Current
3
1,2,3
18 65 50 72 100 72 100
18 65 50
mA mA mAp-p % M F
Ripple Current EFFICIENCY ISOLATION
IRIP EFF ISO
1,2,3, 1 1
Capacitive Load
6,7
CL
4
200
200
Load Fault Power Dissipation Switching Frequency
PD
1
8,5 8.5 450 550 450
8.5 8.5 550
W W KHz
FS DYNAMIC CHARACTERISTICS Step Load Changes 9 Output Transient Recovery
9,10
4
VOTLOAD TTLOAD
50% Load 135 100% Load No Load 135 50% 50% Load 135 100% No Load 335 50% Load 50% Load 335 No lLoad Input step 16 to 40 VDC Input step 40 to 16 VDC Input step 16 to 40 VDC Input step 40 to 16 VDC IOUT = O and Full Load IOUT = O and Full Load
4 4 4 4 4 4 4 4 4 4,5,6 4,5,6 4,5,6
-300 -500
+300 +500 70 1500 5 1200 -1500 4 4 600 10 10
-300 -500
+300 +500 70 1500 5 1500 -1500 4 4 600 10 10
mVpk mVpk S S ms mVpk mVpk s s mVpk ms ms
Step Line Changes 7,11 Output Transient Recovery
7,10, 11
VOTLINE TTLINE
TURN-ON 1 Overshoot 1,12 Delay Load Fault Recovery
7
VTonOS T on D TRLF
For Notes to Specifications, refer to page 5
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AHV28XX Series
Specifications (Triple Output Models)
TCASE = -55C to +125C, 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 300C for 10 seconds (1 pin at a time) Temperature Range Operating -55C to +135C Storage -65C to +135C
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Condition -55C TC +125C, VIN = 28 VDC 5%, CL=0, unless otherwise specified
TEST STATIC CHARACTERISTICS OUTPUT 1 Voltage
SYMBOL
Group A Subgroups
AHV2812T Min Max
AHV2815T Min Max Units
VOUT
IOUT = 0 (main) IOUT = 0 (dual)
1
Current
1,2,3
IOUT
1,4
Ripple Voltage
VRIP
Power
1,2,3
POUT
VIN = 16, 28, and 40 VDC (main) 1 VIN = 16, 28, and 40 VDC (dual) 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) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0 Inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 208mA (12V) IOUT = 167mA (15V) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 208mA (12V) IOUT = 167mA (15V) Input to output or any pin to case (except pin 7) at 500 VDC, TC = +25C No effect on DC performance TC = +25C (main) (dual) Overload, TC = +25C Short Circuit, TC = +25C IOUT = 2000mA (main) IOUT = 208mA (12V) IOUT = 167mA (15V)
5
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
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
10 2.5 2.5 15
REGULATION 1,3 Line
1,3
VRLINE VRLOAD
1,2,3
25 60 50 60
25 75 50 75 15 50 50
mV mV mV mV
Load
INPUT Current
IIN
1,2,3 1,2,3 1,2,3
15 50 50
mA mA mAp-p
Ripple Current
4
IRIP
EFFICIENCY
EFF
1
72
72
%
ISOLATION
ISO
1
100
100
M
Capacitive Load
6,7
CL
4
500 200 8.5 8.5 450 550 450
500 200 8.5 8.5 550
F F W W KHz
Load Fault 3 Power Dissipation Switching Frequency
1
PD
1 1 4
FS
For Notes to Specifications, refer to page 5
4
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AHV28XX Series
Specifications (Triple Output Models) - continued
Condition -55C TC +125C,
TEST DYNAMIC CHARACTERISTICS Step Load Changes 9 Output Transient SYMBOL
VIN = 28 VDC 5%, CL=0, unless otherwise specified
Group A Subgroups
AHV2812T Min Max
AHV2815T Min Max Units
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Recovery
VOTLOAD TTLOAD
9,10
50% Load 135 100% Load No Load 135 50% 50% Load 135 100% No Load 335 50% Load 50% Load 335 No lLoad Input step 16 to 40 VDC Input step 40 to 16 VDC Input step 16 to 40 VDC Input step 40 to 16 VDC IOUT = O and 625mA IOUT = O and 625mA
4 4 4 4 4 4 4 4 4 4 4 4
-300 -400
+300 +400 100 2000 5 1200 -1500 4 4 750 15 15
-300 -400
+300 +400 100 2000 5 1200 -1500 4 4 750 15 15
mVpk mVpk S S ms mVpk mVpk s s mVpk ms ms
Step Line Changes Output Transient Recovery
7,10, 11
VOTLINE TTLINE
TURN-ON 1 Overshoot 1,12 Delay 7 Load Fault Recovery
VTonOS T on D TRLF
Notes to Specifications (Triple Output Models)
Tested at each output. Parameter guaranteed by line and load regulation tests. At least 25 percent of the total power should be taken from the (+5 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. 6. 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 may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. 7. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be guaranteed to the limits specified. 8. Above 125C case temperature, derate output power linearly to 0 at 135C case. 9. Load step transition time between 2 and 10 microseconds. 10. Recovery time is measured from the initiation of the transient to where V OUT has returned to within 1 percent of VOUT at 50 percent load. 11. Input step transition time between 2 and 10 microseconds. 12. Turn on delay time measurement is for either a step application of power at input or the removal of a ground signal from the inhibit pin (pin 8) while power is applied to the input. 1. 2. 3. 4. 5.
Notes to Specifications (Dual Output Models)
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. Total power at both outputs. When operating with unbalanced loads, at least 25% of the load must be on the positive output to maintain regulation. 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 may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be guaranteed to the limits specified. 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. Load step transition time between 2 and 10 microseconds. Recovery time is measured from the initiation of the transient to where VOUT has returned to within 1 percent of VOUT at 50 percent load. Input step transition time between 2 and 10 microseconds. Turn on delay time measurement is for either a step application of power at input or the removal of a ground signal from the inhibit pin (pin 2) while power is applied to the input. Above 125C case temperature, derate output power linearly to 0 at 135C.
7. 8. 9. 10. 11. 12. 13.
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AHV28XX Series
AHV28XX (Single Output) Block Diagram
5 +Vout EMI F ilte r
1 + Inp u t 8 Case
4 R e tu rn
D rive 1
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2 E n a ble
P u lse W id th M o d ulator F B
D rive 2
E rro r Amp & Ref
3 V ADJ
In p u t R e tu rn 10
AHV28XX (Dual Output) Block Diagram
3 +Vout EMI F ilte r
R e g u la to r
1 + In p u t
4 R e tu rn
5 -V o u t
2 E n a b le 8 C a se In p u t R e tu rn 10
D rive 1
P u ls e W id th M o d u la to r F B
D rive 2
Error Am p & R eferen ce
AHV28XX (Triple Output) Block Diagram
5 +V out
R egulator
4 -V out 1 +Input EMI F ilter 2 +5V out
8 E nable 7 C ase Input R eturn 10
D riv e 1
3 R eturn
P uls e W idth D riv e 2 M odulator
FB
E rro r A m p & R e fe re n ce
6
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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 calculated by multiplying Vin times the input current inhibited, typically 225mW at Vin equal to 28 volts. The input current www..com 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 inhibit pin to any voltage between 0 and 6 volts will assure the converter is inhibited. The input current to this pin is 500A 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 50A.
EMI Filter
An optional EMI filter ( AFC461) will reduce the input ripple current to levels below the limits imposed by MIL-STD461 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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AHV28XX Series
AHV28XX Case Outlines Single and Dual Output Models
0.050 T ypical 0.040 D X 0.26 L Pins 0.800
10
1
9
2
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2.880 Max 2.560 2.110 Max 4 X 0.400 =1.600
8
3
7
4
6
5
1.110
0.405 Max
O 0.162 2 H oles T ypical
Triple Output Models
1.000
10
1
9
2
1.95 2.360 2.700 M ax
8
3 4
7
5
6
0.410 M ax
1.345
Pin Designation
SIGNAL DESIGNATION PIN # 1 2 3 4 5 6 7 8 9 10 SINGLE OUTPUT Positive Input Enable Input Output Adjust* Output Common Positive Output N/C N/C Case Ground N/C Input Common DUAL OUTPUT Positive Input Enable Input Positive Output Output Common Negative Output N/C N/C Case Ground N/C Input Common TRIPLE OUTPUT Positive Input +5VDC Output Output Common Neg. Dual Output (12/15 VDC) Pos. Dual Output (12/15 VDC) N/C Case Ground Enable Input N/C Input Common
Part Numbering
AHV 28 15 T F / CH
Model Input Voltage
28 = 28V Nominal
Screening
-
, ES, HB, CH F = Flange
Package Style Outputs
S = Single D = Dual T = Triple
Output Voltage
Single - 05, 12, 15V Dual - 12 = 12V, 15 = 15V Triple - 12 = 5V, 12V 15 = 5V, 15V
* Output Adjust (Single Output Models Only)
8
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AHV28XX Series
Available Screening Levels and Process Variations for AHV28XX Series
Requirement Temperature Range Element Evaluation MIL-STD-883 Method No Suffix -20C to +85C ES Suffix -55C to +125C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 2017 1010 2001 1015 MIL-PRF-38534 & Specification 1014 2009 Cond A Cond A, C Yes Cond A, C Yes Cond A, C Yes 48hrs @ 85C 25C Yes Cond B 500g 48hrs @ 125C 25C Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C
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Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual
* Per Commercial Standards
Available Standard Military Drawing (SMD) Cross Reference
Standardized Military Drawing Pin AHV2805SF/CH AHV2812SF/CH AHV2815SF/CH AHV2812DF/CH AHV2815DF/CH AHV2812TF/CH AHV2815TF/CH Vendor CAGE Code 52467 52467 52467 52467 52467 52467 52467 Vendor Similar Pin 5962-9177301 5962-9211201 5962-9211301 5962-9211401 5962-9177401 5962-9211501 5962-9211601
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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