View AFL270XXS_176676.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www..com
PD - 94435A
AFL270XXS 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 or +270 volt inputs with output power ranging from 80 to 120 watts. 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. 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, soft-start 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-PRF38534 for class H. The HB grade is fully processed and screened to the class H requirement, but does not have material element evaluated to the class H requirement. 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
270V Input, Single Output
AFL Features
n n n n n n n n n n n n n n n n n 160 To 400 Volt Input Range 5, 6, 9, 12, 15 and 28 Volt Outputs Available High Power Density - up to 84 W /in3 Up To 120 Watt Output Power Parallel Operation with Stress and Current Sharing Low Profile (0.380") Seam Welded Package Ceramic Feedthru Copper Core Pins High Efficiency - to 87% Full Military Temperature Range Continuous Short Circuit and Overload Protection Remote Sensing Terminals Primary and Secondary Referenced Inhibit Functions Line Rejection > 60 dB - DC to 50KHz External Synchronization Port Fault Tolerant Design Dual Output Versions Available Standard Military Drawings Available
demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog for special requirements.
www.irf.com
1
07/24/02
AFL270XXS Series Specifications
ABSOLUTE MAXIMUM RATINGS
Input Voltage Soldering Temperature Case Temperature -0.5V to 500V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
Static Characteristics -55C TCASE +125C, 160 VIN 400 unless otherwise specified.
Parameter INPUT VOLTAGE OUTPUT VOLTAGE AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S OUTPUT CURRENT AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S OUTPUT POWER AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S MAXIMUM CAPACITIVE LOAD OUTPUT VOLTAGE TEMPERATURE COEFFICIENT OUTPUT VOLTAGE REGULATION AFL27028S Line All Others Line Load OUTPUT RIPPLE VOLTAGE AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S 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 VIN = 160, 270, 400 Volts, 100% Load, BW = 10MHz Note 1 10,000 +0.015 Note 6 80 81 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 = 160, 270, 400 Volts - Note 6 Group A Subgroups Note 6 VIN = 270 Volts, 100% Load 4.95 5.94 8.91 11.88 14.85 27.72 4.90 5.88 8.82 11.76 14.70 27.44 5.00 6.00 9.00 12.00 15.00 28.00 5.05 6.06 9.09 12.12 15.15 28.28 5.10 6.12 9.18 12.24 15.30 28.56 V V V V V V V V V V V V Test Conditions Min 160 Nom 270 Max 400 Unit V
16.0 13.5 10.0 9.0 8.0 4.0
A A A A A A
VIN = 270 Volts, 100% Load - Note 1, 6 -0.015
No Load, 50% Load, 100% Load VIN = 160, 270, 400 Volts
-70.0 -10.0 -1.0
+70.0 +10.0 +1.0 30 35 40 45 50 100
mV mV % mVpp mVpp mVpp mVpp mVpp mVpp
For Notes to Specifications, refer to page 4
2
www.irf.com
AFL270XXS Series Static Characteristics (Continued)
Parameter INPUT CURRENT No Load Inhibit 1 Inhibit 2 INPUT RIPPLE CURRENT AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S CURRENT LIMIT POINT Expressed as a Percentage of Full Rated Load LOAD FAULT POWER DISSIPATION Overload or Short Circuit EFFICIENCY AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S 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 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, Pin 4 or Pin 12 Note 1 Logical High, Pin 4 and Pin 12 - Note 9 Note 1 1 2 3 VIN = 270 Volts 1, 2, 3 VIN = 270 Volts, 100% Load 78 79 80 82 83 82 -0.5 2.0 82 83 84 85 87 85 0.8 100 50 100 550 600 700 10 0.8 100 80 % % % % % % V A V A KHz KHz V V nSec % M 85 300 gms KHrs 30 W 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 Group A Subgroups Test Conditions VIN = 270 Volts IOUT = 0 Pin 4 Shorted to Pin 2 Pin 12 Shorted to Pin 8 VIN = 270 Volts, 100% Load B.W. = 10MHz 60 60 70 70 80 80 Note 5 115 105 125 125 115 140 % % % mApp mApp mApp mApp mApp mApp Min Nom Max Unit
15 17 3.0 5.0
mA mA mA mA
VOUT = 90% VNOM
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 = 70C
500 500 2.0 -0.5 20 100
For Notes to Specifications, refer to page 4
www.irf.com
3
AFL270XXS Series
Dynamic Characteristics -55C TCASE +125C, VIN = 270 Volts unless otherwise specified.
Parameter Group A Subgroup s 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 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 = 160 400 Volts VIN = 160, 270, 400 Volts. Note 4 4, 5, 6 4, 5, 6 Enable 1, 2 on. (Pins 4, 12 high or open) Same as Turn On Characteristics. MIL-STD-461, CS101, 30Hz to 50KHz Note 1 60 70 dB 50 75 250 120 mV mSec -500 500 500 mV Sec -450 -450 -450 -450 -600 -600 -750 -750 -900 -900 -1200 -1200 450 200 450 400 450 200 450 400 600 200 600 400 750 200 750 400 900 200 900 400 1200 200 1200 400 mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec mV Sec Test Conditions Min Nom Max Unit
LOAD TRANSIENT RESPONSE AFL27005S Amplitude Recovery Amplitude Recovery AFL27006S Amplitude Recovery Amplitude Recovery AFL27009S Amplitude Recovery Amplitude Recovery AFL27012S Amplitude Recovery Amplitude Recovery AFL27015S Amplitude Recovery Amplitude Recovery AFL27028S 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.
4
www.irf.com
AFL270XXS Series AFL270XXS Circuit Description
Figure I. AFL Single Output Block Diagram
DC INPUT 1 INPUT FILTER
ENABLE 1
4
PRIMARY BIAS SUPPLY
OUTPUT FILTER
7 10
+ OUTPUT + SENSE
CURRENT SENSE SYNC OUTPUT 5 SHARE CONTROL SYNC INPUT 6
.*
ERROR AMP & REF
AMPLIFIER
11 12
SHARE ENABLE 2
CASE
3
SENSE AMPLIFIER
9 8
- SENSE OUTPUT RETURN
INPUT RETURN
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. 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.
used, the sense 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 100K Pin 4 or Pin 12 1N4148
290K
Disable
Remote Sensing
Connection of the + and - sense leads at a remotely locatled 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 features is not
150K Pin 2 or Pin 8
2N3904
www.irf.com
5
AFL270XXS 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). 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 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 synchronization connection option 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 of a load current exceeding the capacity of an individual AFL among the members of the set. An important feature 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 temperture, the current it provides to the load will be reduced as compensation for the temperature induced stress on that device.
6
www.irf.com
AFL270XXS 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 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. 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 (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 AFL27015S at +85C in an area where the 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. 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
T = 85 - 25 = 60C
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) = 24.6 W .83
and the required heat sink area is
. -143 60 A HEAT SINK = - 3.0 = 71 in 2 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.
1Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
www.irf.com
7
AFL270XXS Series
Input Filter
The AFL270XXS 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. 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
Enable 2 Share
Figure IV. Input Filter Circuit
8.4H
AFL270XXS
R ADJ
+ Sense - Sense Return
Pin 1 0.54fd
To Load
+ V out
Pin 2
Caution: Do not set Radj < 500
Undervoltage Lockout
A minimum voltage is required at the input of the converter to initiate operation. This voltage is set to 150 5 volts. To preclude the possibility of noise or other variations at the input falsely initiating and halting converter operation, a hysteresis of approximately 10 volts is incorporated in this circuit. Thus if the input voltage droops to 140 5 volts, the converter will shut down and remain inoperative until the input voltage returns to 150 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 500. By remaining within this specified range of values, completely safe operation fully within normal component derating 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 AFL270XXS 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 AFL270XXS 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. While operation in this condition is not damaging to the device, not all performance parameters will be met.
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 equation presented below.
VNOM Radj = 100 * VOUT - VNOM -.025
Where VNOM = device nominal output voltage, and
Performance Data
Typical performance data is graphically presented on the following pages for selected parameters on a variety of AFL270XXS type converters. The data presented was selected as representative of more critical parameters and for general interest in typical converter applications.
VOUT = desired output voltage
8
www.irf.com
AFL270XXS Series AFL270XXS - Typical Line Rejection Characteristics
Measured per MIL-STD 461D, CS101 with 100% Output Load, Vin = 270VDC AFL27005S
0
0
AFL27006S
-20
-20
-40
-40
-60
-60
-80
-80
-100 30 100 1000 10000 50000
-100 30 100 1000 10000 50000
Frequency ( Hz )
Frequency ( Hz )
AFL27009S
0 0
AFL27012S
-20
-20
-40
-40
-60
-60
-80
-80
-100 30 100 1000 10000 50000
-100 30 100 1000 10000 50000
Frequency ( Hz )
Frequency ( Hz )
AFL27015S
0
0
AFL27028S
-20
-20
-40
-40
-60
-60
-80
-80
-100 30 100 1000 10000 50000
-100 30 100 1000 10000 50000
Frequency ( Hz )
Frequency ( Hz )
www.irf.com
9
AFL270XXS Series AFL270XXS Typical Efficiency Characteristics
Presented for three values of Input Voltage. AFL27005S
90
AFL27006S
90
80
80
160V 70 270V
160V 70 270V
60 400V
60 400V
50 0 20 40 60 80
50 0 20 40 60 80
Output Power ( Watts )
Output Power ( Watts )
AFL27009S
90 95
AFL27012S
80
85
160V 70 75 270V
160V
270V
60 400V
65 400V
50 0 20 40 60 Output Power ( Watts ) 80 100 55 0 20 40 60 80 100 120
Output Power ( Watts )
AFL27015S
95 90
AFL27028S
85
80
160V
160V 270V
75 270V
70
400V 65 400V 60
55 0 20 40 60 80 100 120
50 0 20 40 60 80 100 120
Output Power ( Watts )
Output Power ( Watts )
10
www.irf.com
AFL270XXS Series Typical Performance Characteristics - AFL27005S
Output Load = 100%, Vin = 270VDC unless otherwise specified. Turn-on Time, No Load
6 6 5
Turn-on Time, Full Load
5
4
4
3
3
2
2
1
1
0
0
-1 70 75 80 85 90 95 100
-1 70 75 80 85 90 95 100
Time from Application of Input Power ( msec )
Time from Application of Input Power ( msec )
Output Ripple Voltage
8 40
Input Ripple Current
4
20
0
0
-4
-20
-8 0 2 4 6 8 10
-40 0 2 4 6 8 10
Time ( usec )
Time ( usec )
Output Load Transient Response 50% Load to/from 100% Load
400
Output Load Transient Response 10% Load to/from 50% Load
400
200
200
0
0
-200
-200
-400 0 200 400 600 800 1000
-400 0 200 400 600 800 1000
Time ( usec )
Time ( usec )
www.irf.com
11
AFL270XXS Series Typical Performance Characteristics - AFL27015S
Output Load = 100%, Vin = 270VDC unless otherwise specified. Turn-on Time, No Load
18 16 14 12 10 8 6 4 2 0 -2 50 55 60 65 70 75 80
18 16 14 12 10 8 6 4 2 0 -2 50 55 60 65 70 75 80
Turn-on Time, Full Load
Time from Application of Input Power ( msec )
Time from Application of Input Power ( msec )
Output Ripple Voltage
8
Input Ripple Current
40
4
20
0
0
-4
-20
-8 0 2 4 6 8 10
-40 0 2 4 6 8 10
Time ( usec )
Time ( usec )
Output Load Transient Response 50% Load to/from 100% Load
800
800
Output Load Transient Response 10% Load to/from 50% Load
400
400
0
0
-400
-400
-800 0 200 400 600 800 1000
-800 0 200 400 600 800 1000
Time ( usec )
Time ( usec )
12
www.irf.com
AFL270XXS Series Typical Performance Characteristics - AFL27028S
Output Load = 100%, Vin = 270VDC unless otherwise specified. Turn-on Time, No Load
30
Turn-on Time, Full Load
30
25
25
20
20
15
15
10
10
5
5
0
0
-5 60 65 70 75 80 85 90
-5 60 65 70 75 80 85 90
Time from Application of Input Power ( msec )
Time from Application of Input Power ( msec )
Output Ripple Voltage
8 40
Input Ripple Current
4
20
0
0
-4
-20
-8 0 2 4 6 8 10
-40 0 2 4 6 8 10
Time ( usec )
Time ( usec )
Output Load Transient Response 50% Load to/from 100% Load
800 800
Output Load Transient Response 10% Load to/from 50% Load
400
400
0
0
-400
-400
-800 0 200 400 600 800 1000
-800 0 200 400 600 800 1000
Time ( usec )
Time ( usec )
www.irf.com
13
AFL270XXS Series
AFL270XXS to Standard Military Drawing Equivalence Table
AFL27005S AFL27006S AFL27009S AFL27012S AFL27015S AFL27028S 5962-9456901 5962-9553401 5962-9553501 5962-9475301 5962-9457001 5962-9556501
Available Screening Levels and Process Variations for AFL270XXS Series.
MIL-STD-883 Method No Suffix -20 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 48hrs @ 85C 25C u Cond B 500g 48hrs @ 125C 25C u Cond C Cond A 160hrs @ 125C -55, +25, +125C u Cond C Cond A 160hrs @ 125C -55, +25, +125C
Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A)
Seal, Fine & Gross External Visual
Cond C
Cond A, C u
Cond A, C u
Cond A, C u
*
per Commercial Standards
14
www.irf.com
AFL270XXS Series AFL270XXS 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
www.irf.com
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
0.250
1 6
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
15
AFL270XXS Series
AFL270XXS Pin Designation
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Designation Positive Input Input Return Case Enable 1 Sync Output Sync Input Positive Output Output Return Return Sense Positive Sense Share Enable 2
Part Numbering
AFL 270 05 S X / CH
Model Input Voltage
270 = 270V 28 = 28V
Screening Case Style
W, X, Y, Z
- , ES HB, CH
Output Voltage
05 = 5V, 06 = 6V 09 = 9V, 12 = 12V 15 = 15V, 28 = 28V
Outputs
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
16
www.irf.com

▲Up To Search▲

Price & Availability of AFL270XXS

	To Download AFL270XXS Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .