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PD - 94457A
AFL50XXS SERIES ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS
Description
The AFL Series of DC/DC converters feature high power density with no derating over the full military temperature range. This series is offered as part of a complete family of converters providing single and dual output voltages and operating from nominal +28, +50, +120 or +270 volt inputs with output power ranging from 80 to 120 watts. For applications requiring higher output power, individual converters can be operated in parallel. The internal current sharing circuits assure equal current distribution among the paralleled converters. This series incorporates Advanced Analog'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 550 KHz. Multiple converters can be synchronized to a system clock in the 500 KHz to 700 KHz range or to the synchronization output of one converter. Undervoltage lockout, primary and secondary referenced inhibit, softstart and load fault protection are provided on all models. 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 Advanced Analog's rugged ceramic lead-to-package seal assuring long term hermeticity in the most harsh environments. Manufactured in a facility fully qualified to MIL-PRF38534, these converters are available in four screening grades to satisfy a wide range of requirements. The CH grade is fully compliant to the requirements of MIL-H38534 for class H. The HB grade is fully processed and screened to the class H requirement, 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
50V Input, Single Output
AFL Features
n 30 To 80 Volt Input Range n 3.3, 5, 8, 9 12, 15, 24 and 28 Volts Outputs Available n High Power Density - up to 84 W / in3
n Up To 120 Watt Output Power n Parallel Operation with Stress and Current Sharing n Low Profile (0.380") Seam Welded Package n Ceramic Feedthru Copper Core Pins n High Efficiency - to 85% 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 > 40 dB - DC to 50KHz n External Synchronization Port n Fault Tolerant Design n Dual Output Versions Available n Standard Military Drawings Available
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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07/09/02
AFL50XXS Series
Specifications
ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 100V 300C for 10 seconds Operating Storage -55C to +125C -65C to +135C
Static Characteristics -55C < TCASE < +125C, 30V< VIN < 80V unless otherwise specified.
Parameter INPUT VOLTAGE OUTPUT VOLTAGE AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S OUTPUT CURRENT AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S OUTPUT POWER AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S MAXIMUM CAPACITIVE LOAD OUTPUT VOLTAGE TEMPERATURE COEFFICIENT OUTPUT VOLTAGE REGULATION AFL5028S Line All Others Line Load OUTPUT RIPPLE VOLTAGE AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S 1, 2, 3 1, 2, 3 1, 2, 3 VIN = 30, 50, 80 Volts, 100% Load, BW = 10MHz Note 1 VIN = 50 Volts, 100% Load - Note 1, 6 10,000 -0.015 +0.015 Note 6 80 80 90 108 120 112 W W W W W W fd %/C 1 1 1 1 1 1 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 VIN = 30, 50, 80 Volts - Note 6 Group A Subgroups Note 6 VIN = 50 Volts, 100% Load 4.95 7.92 8.91 11.88 14.85 27.72 4.90 7.84 8.82 11.76 14.70 27.44 5.00 8.00 9.00 12.00 15.00 28.00 5.05 8.08 9.09 12.12 15.15 28.28 5.10 8.16 9.18 12.24 15.30 28.56 V V V V V V V V V V V V Test Conditions Min 30 Nom 50 Max 80 Unit V
16.0 10.0 10.0 9.0 8.0 4.0
A A A A A A
No Load, 50% Load, 100% Load VIN = 30, 50, 80 Volts
-70.0 -20.0 -1.0
+70.0 +20.0 +1.0
mV mV %
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3
30 40 40 45 50 100
mVpp mVpp mVpp mVpp mVpp mVpp
For Notes to Specifications, refer to page 4
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AFL50XXS Series
Static Characteristics (Continued)
Group A Subgroups
Parameter INPUT CURRENT No Load Inhibit 1 Inhibit 2 INPUT RIPPLE CURRENT AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S CURRENT LIMIT POINT As a percentage of full rated load
Test Conditions VIN = 50 Volts IOUT = 0 Pin 4 Shorted to Pin 2 Pin 12 Shorted to Pin 8 VIN = 50 Volts, 100% Load, BW = 10MHz
Min
Nom
Max
Unit
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
50 60 5 5 60 60 60 60 60 60
mA mA mA mA mApp mApp mApp mApp mApp mApp
1 2 3 1, 2, 3
VOUT = 90% VNOM , VIN = 50 Volts Note 5
115 105 125
125 115 140 32
% % % W % % % % % %
LOAD FAULT POWER DISSIPATION Overload or Short Circuit EFFICIENCY AFL5005S AFL5008S AFL5009S AFL5012S AFL5015S AFL5028S ENABLE INPUTS (Inhibit Function) Converter Off Sink Current Converter On Sink Current SWITCHING FREQUENCY SYNCHRONIZATION INPUT Frequency Range Pulse Amplitude, Hi Pulse Amplitude, Lo Pulse Rise Time Pulse Duty Cycle ISOLATION DEVICE WEIGHT MTBF
VIN = 50 Volts VIN = 50 Volts, 100% 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 Logical Low on Pin 4 or Pin 12 Note 1 Logical High on Pin 4 and Pin 12 - Note 9 Note 1 78 79 80 81 82 82 -0.5 2.0 81 82 83 84 85 84 0.8 100 50 100 550 600 700 10 0.8 100 80
V A V A KHz KHz V V nSec % M
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 Note 1 Note 1 1 Input to Output or Any Pin to Case (except Pin 3). Test @ 500VDC Slight Variations with Case Style MIL-HDBK-217F, AIF @ TC = 40C
500 500 2.0 -0.5 20 100
85 300
gms KHrs
For Notes to Specifications, refer to page 4
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AFL50XXS Series
Dynamic Characteristics -55C < TCASE < +125C, VIN=50V unless otherwise specified.
Parameter LOAD TRANSIENT RESPONSE AFL5005S Amplitude Recovery Amplitude Recovery AFL5008S Amplitude Recovery Amplitude Recovery AFL5009S Amplitude Recovery Amplitude Recovery AFL5012S Amplitude Recovery Amplitude Recovery AFL5015S Amplitude Recovery Amplitude Recovery AFL5028S Amplitude Recovery Amplitude Recovery LINE TRANSIENT RESPONSE Amplitude Recovery TURN-ON CHARACTERISTICS Overshoot Delay LOAD FAULT RECOVERY LINE REJECTION
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% of VOUT at 50% load. Line transient transition time 100 Sec. Turn-on delay is measured with an input voltage rise time of between 100 and 500 volts per millisecond. 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 10 Sec. Enable inputs internally pulled high. Nominal open circuit voltage 4.0VDC.
Group A Subgroups Note 2, 8 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6
Test Conditions
Min
Nom
Max
Unit
Load Step 50% 100% Load Step 10% 50% Load Step 50% 100% Load Step 10% 50% Load Step 50% 100% Load Step 10% 50% Load Step 50% 100% Load Step 10% 50% Load Step 50% 100% Load Step 10% 50% Load Step 50% 100% Load Step 10% 50% Note 1, 2, 3 VIN Step = 30 80 Volts VIN = 30, 50, 80 Volts. Note 4
-450 -450 -500 -500 -600 -600 -750 -750 -750 -750 -1200 -1200
450 200 450 300 500 200 500 300 600 200 600 300 750 200 750 300 750 200 750 300 1200 200 1200 300
mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec
-500
500 500
mV Sec
4, 5, 6 4, 5, 6
Enable 1, 2 on. (Pins 4, 12 high or open) Same as Turn On Characteristics. MIL-STD-461D, CS101, 30Hz to 50KHz Note 1
50
75
250 120
mV mSec
40
50
dB
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AFL50XXS Series
AFL50XXS Circuit Description
Figure I. AFL Single Output Block Diagram
DC Input 1 Input Filter Output Filter Current Sense Sync Output Sync Input Case Input Return 5 Control 6
FB
Enable 1
4
Primary Bias Supply
7 10
+Output +Sense
Error Amp & Ref
Share Amplifier Sense Amplifier
11
Share
12 Enable 2 9 8 -Sense Output Return
3 2
Circuit Operation and Application Information
The AFL 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. A power MOSFET is used to chop the DC input voltage into a high frequency square wave, applying this chopped voltage to the power transformer at the nominal converter switching frequency. Maintaining a DC voltage within the specified operating range at the input assures continuous generation of the primary bias voltage. The switched voltage impressed on the secondary output transformer winding is rectified and filtered to generate the converter DC 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 MOSFET, narrowing the width if the output voltage is too high and widening it if it is too low, thereby regulating the output voltage.
of application. When the remote sensing feature is not used, the sense lead should be connected to their respective output terminals at the converter. Figure III. illustrates a typical remotely sensed 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
+5.6 V 100K Pin 4 o r Pin 12 1N 4 148
290K
D isable 2N 3 904
Remote Sensing
Connection of the + and - sense leads at a remotely located load permits compensation for excessive resistance between the converter output and the load when their physical separation could cause undesirable voltage drop. This connection allows regulation to the placard voltage at the point
180K Pin 2 o r Pin 8
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AFL50XXS 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 to the user save for minor differences in idle current. (See specification table). level of +2.0 volts. 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 open (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 50 KHz, 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 100 ns and the low level output impedance is less than 50 ohms. 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 connection is illustrated in Figure III.
Synchronization of Multiple Converters
When operating multiple converters, system requirements often dictate operation of the converters at a common frequency. To accommodate this requirement, the AFL series converters provide both a synchronization input and output. The sync input port permits synchronization of an AFL converter to any compatible external frequency source operating between 500 and 700 KHz. This input signal should be referenced to the input return and have a 10% to 90% duty cycle. Compatibility requires transition times less th an 100 ns, maximum low level of +0.8 volts and a minimum high
Figure III. Preferred Connection for Parallel Operation
Power Input
1 12
Vin Rtn Case Enable 1 Sync Out Sync In
Enable 2 Share
AFL
+ Sense - Sense Return + Vout
7
Optional Synchronization Connection
6
Share Bus
1 12
Vin Rtn Case Enable 1 Sync Out Sync In
6
Enable 2 Share
AFL
+ Sense - Sense Return + Vout
7
to Load
1
12
Vin Rtn Case Enable 1 Sync Out Sync In
6
Enable 2 Share
AFL
+ Sense - Sense Return + Vout
7
(Other Converters)
Parallel Operation-Current and Stress Sharing
Figure III. illustrates the preferred connection scheme for operation of a set of AFL converters with outputs operating in parallel. Use of this connection permits equal sharing among the members of a set whose load current exceeds the capacity of an individual AFL. An important feaure of the
AFL 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 temperature, the current it provides to the load will be reduced as compensation for the temperature induced stress on that device.
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AFL50XXS 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 return pins connected at a star point which is located 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 only 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. 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:
. T -143 - 3.0 A HEAT SINK 80P 0.85
where T = Case temperature rise above ambient 1 P = Device dissipation in Watts = POUT - 1 Eff
As an example, it is desired to maintain the case temperature of an AFL5015S at +85C while operating in an open area whose ambient temperature is held at a constant +25C; then
Thermal Considerations
Because of the incorporation of many innovative technological concepts, the AFL 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 125C, this heat must be transferred by conduction to an appropriate heat dissipater held in intimate contact with the converter base-plate. Since the 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 transferring 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 product is an insulator but electrically conductive versions are also available. Use of these materials assures maximum surface contact with the heat dissipater thereby compensating for any minor surface variations. While other available types of heat conductive materials and thermal compounds provide similar effectiveness, these alternatives are often less convenient and can be somewhat messy to use.
1Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
T = 85 - 25 = 60C
If the worst case full load efficiency for this device is 83%; then the power dissipation at full load is given by
1 P = 120 * - 1 = 120 * ( 0.205) = 24.6 W .83
and the required heat sink area is
. -143 60 - 3.0 = 71 in 2 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 60C 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.
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AFL50XXS Series
Input Filter
The AFL50XXS series converters incorporate a LC input filter whose elements dominate the input load impedance characteristic at turn-on. The input circuit is as shown in Figure IV. 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 Adjustment Figure IV. Input Filter Circuit
Enable 2
0.75 H
Share
P in 1
R ADJ
AFL50xxS
2.7 fd
+ Sense - Sense Return To Load + Vout
P in 2
Note: Radj must be set 500
Undervoltage Lockout
A minimum voltage is required at the input of the converter to initiate operation. This voltage is set to 26.5 1.5 volts. To preclude the possibility of noise or other variations at the input falsely initiating and halting converter operation, a hysteresis of approximately 2 volts is incorporated in this circuit. Thus if the input voltage droops to 24.5 1.5 volts, the converter will shut down and remain inoperative until the input voltage returns to 25 volts.
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 500W. By remaining within this specified range of values, completely safe operation fully within normal component derating limits is assured. 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 AFL50XXS 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 25mV above nominal device voltage. The consequence is that if the +sense connection is unintentionally broken, an AFL50XXS has a fail-safe output voltage of Vout + 25mV, where the 25mV 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 + 440mV. This 440 mV is also essentially constant independent of the nominal output voltage.
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 between the +sense and -sense pins while connecting the -sense pin to the output return pin as shown in Figure V. below. The range of adjustment and corresponding range of resistance values can be determined by use of the following equation.
VNOM Radj = 100 * VOUT - VNOM -.025
Where
VNOM = device nominal output voltage, and VOUT = desired output voltage
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AFL50XXS Series
General Application Information
The AFL50XXS series of converters are capable of providing large transient currents to user loads on demand. Because the nominal input voltage range in this series is relatively low, the resulting input current demands will be correspondingly large. It is important therefore, that the line impedance be kept very low to prevent steady state and transient input currents from degrading the supply voltage between the voltage source and the converter input. In applications requiring high static currents and large transients, it is recommended that the input leads be made of adequate size to minimize resistive losses, and that a good quality capacitor of approximately100fd be connected directly across the input terminals to assure an adequately low impedance at the input terminals. Table I relates nominal resistance values and selected wire sizes.
Table 1. Nominal Resistance of Cu Wire Wire Size, AWG 24 Ga 22 Ga 20 Ga 18 Ga 16 Ga 14 Ga 12 Ga Resistance per ft 25.7 m 16.2 m 10.1 m 6.4 m 4.0 m 2.5 m 1.6 m
Incorporation of a 100 fd capacitor at the input terminals is recommended as compensation for the dynamic effects of the parasitic resistance of the input cable reacting with the complex impedance of the converter input, and to provide an energy reservoir for transient input current requirements.
Figure VI. Problems of Parasitic Resistance in input Leads (See text)
Rp I in
100 fd
Vin e Rtn Rtn Case
e source
Rp
I Rtn
System Ground
Enable 1 Sync Out Sync In
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AFL50XXS Series
AFL50XXS Case Outlines
Case X Case W
Pin Variation of Case Y
3.000 2.760
o 0.128
0.050 0.250
12
0.050
7
0.25 typ
12
7
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
1 6
0.250
1.260 1.500
1.000 Ref
0.200 Typ Non-cum Pin o 0.040
1.000
2.500
0.220
0.220 2.800 0.525
Pin o 0.040
2.975 max 0.238 max
0.42
0.380 Max
0.380 Max
Case Y
1.150 0.300 o 0.140 0.050
Case Z
Pin Variation of Case Y
0.050
0.250
1 6
0.250
1.500 1.750 2.00
1.000 Ref
0.200 Typ Non-cum Pin o 0.040
1.000 Ref
Pin o 0.040
1.750 2.500
0.375
0.220
0.220 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
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AFL50XXS Series
Available Screening Levels and Process Variations for AFL50XXS Series.
Requirement
Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual 2017 1010 2001, 1015 MIL-PRF-38534 1014 2009 48hrs @ 85C 25C Yes Cond B 500g 48hrs @ 125C 25C Cond A, C Yes Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C Cond A, C Yes
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 Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C Cond A, C Yes
* per Commercial Standards AFL50XXS Pin Designation
Pin No.
1 2 3 4 5 6 7 8 9 10 11 12
Part Numbering
AFL 50 05 S X / CH Mode Input Screenin - Case
W, X, Y, Z , ES HB, CH
Designation
Positive Input Input Return Case Enable 1 Sync Output Sync Input Positive Output Output Return Return Sense Positive Sense Share Enable 2
28= 28 V, 50= 50 V 120=120 V, 270= 270 V
Output
3R3= 3.3 V, 05= 5 V 08= 8 V, 09= 9 V 12= 12 V, 15= 15 V 24= 24 V, 28= 28 V
Output
S = Single D = Dual
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. 07/02
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