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元器件交易网RID-HIGH RELIABILITYDC/DC CONVERTERDescriptionThe AFL Series of DC/DC converters feature high powerdensity with no derating over the full military temperaturerange. This series is offered as part of a complete familyof converters providing single and dual output voltagesand operating from nominal +28V or +270V inputs withoutput power ranging from 80W to 120W. For applicationsrequiring higher output power, individual converterscan be operated in parallel. The internal current sharingcircuits assure equal current distribution among theparalleled converters. This series incorporates InternationalRectifier’s proprietary magnetic pulse feedbacktechnology providing optimum dynamic line and loadregulation response. This feedback system samplesthe output voltage at the pulse width modulator fixedclock frequency, nominally 550KHz. Multiple converterscan be synchronized to a system clock in the 500KHzto 700KHz range or to the synchronization output ofone converter. Undervoltage lockout, primary andsecondary referenced inhibit, soft-start and load faultprotection are provided on all converters are hermetically packaged in twoenclosure variations, utilizing copper core pins tominimize resistive DC losses. Three lead styles areavailable, each fabricated with International Rectifier’srugged ceramic lead-to-package seal assuring longterm hermeticity in the most harsh ctured in a facility fully qualified to MIL-PRF-38534, these converters are fabricated utilizing DSCCqualified processes. For available screening options,refer to device screening table in the data ions in electrical, mechanical and screening canbe accommodated. Contact IR Santa Clara for - 94463CAFL120XXD SERIES120V Input, Dual OutputAFLFeaturesnn80V To 160V Input Rangen±High Power Density - up to 70W/in5V,

±12V, and

±15V Outputs Available3nnUp To 100W Output PowernParallel Operation with Power SharingnLow Profile (0.380") Seam Welded PackagenCeramic Feedthru Copper Core PinsnHigh Efficiency - to 87%nFull Military Temperature Range ProtectionContinuous Short Circuit and OverloadnnOutput Voltage Trim Inhibit FunctionsPrimary and Secondary ReferencednnLine Rejection > 50dB - DC to 50KHznExternal Synchronization PortnFault Tolerant DesignnSingle Output Versions AvailableStandard Microcircuit Drawings Available112/15/06

元器件交易网120XXD SeriesSpecifications Absolute Maximum Ratings

Input voltage Soldering temperature Operating case temperature Storage case temperature -0.5V to +180VDC

300°C for 10 seconds -55°C to +125°C -65°C to +135°CStatic Characteristics -55°C < TCASE < +125°C, 80V< VIN < 160V

unless otherwise specified.

Parameter

INPUT VOLTAGE

Group A

Subgroups

Test Conditions

Min

Nom

Max

Unit

Note 6 80 120 160 V

4.95

-5.05

11.88

-12.12

14.85

-15.15

4.90

-5.10

11.76

-12.24

14.70

-15.30

5.00

-5.00

12.00

-12.00

15.00

-15.00

5.05

-4.95

12.12

-11.88

15.15

-14.85

5.10

-4.90

12.24

-11.76

15.30

-14.70

12.8

6.4

5.3

80

96

100

10,000

-0.015

-0.5

-1.0

-1.0

-8.0

-1.0

-5.0

-1.0

-5.0

+0.015

+0.5

+1.0

+1.0

+8.0

+1.0

+5.0

+1.0

+5.0

W

µF

%/°C

%

V

A

VIN = 120 Volts, 100% Load

OUTPUT VOLTAGE

1

AFL12005D

Positive Output

1

Negative Output

1

AFL12012D

Positive Output

1

Negative Output

1

AFL12015D

Positive Output

1

Negative Output

2, 3

AFL12005D

Positive Output

2, 3

Negative Output

2, 3

AFL12012D

Positive Output

2, 3

Negative Output

AFL12015D

2, 3

Positive Output

2, 3

Negative Output

VIN = 80, 120, 160 Volts - Notes 6, 11

OUTPUT CURRENT

AFL12005D

Either Output

AFL12012D

Either Output

AFL12015D

Either Output

OUTPUT POWER

Total of Both Outputs. Notes 6,11

AFL12005D

AFL12012D

AFL12015D

MAXIMUM CAPACITIVE LOAD

OUTPUT VOLTAGE

TEMPERATURE COEFFICIENT

Each Output Note 1

VIN = 120 Volts, 100% Load - Notes 1, 6

Note 10

OUTPUT VOLTAGE REGULATION

No Load, 50% Load, 100% Load

1, 2, 3

Line

VIN = 80, 120, 160 Volts.

1, 2, 3

Load

VIN = 80, 120, 160 Volts. Note 12

Cross

AFL12005D

Positive Output

1, 2, 3

Negative Output

AFL12012D

Positive Output

1, 2, 3

Negative Output

Positive Output

1, 2, 3

AFL12015D

Negative Output

For Notes to Specifications, refer to page

元器件交易网120XXD SeriesStatic Characteristics

(Continued)

Parameter

Group A

Subgroups

Test Conditions

Min

Nom

Max

60

80

80

20

25

3.0

5.0

60

70

80

125

115

140

32

78

82

83

-0.5

2.0

500

500

2.0

-0.5

20

82

85

87

Unit

mVpp

mA

mApp

%

W

%

V

µA

V

µA

KHz

KHz

V

V

ns

%

OUTPUT RIPPLE VOLTAGE

VIN = 80, 120, 160 Volts, 100% Load,

BW = 10MHz

AFL12005D

1, 2, 3

AFL12012D

1, 2, 3

AFL12015D

1, 2, 3

VIN = 120 Volts

INPUT CURRENT

1

IOUT = 0

No Load

2, 3

1, 2, 3

Inhibit 1

Pin 4 Shorted to Pin 2

1, 2, 3

Pin 12 Shorted to Pin 8

Inhibit 2

INPUT RIPPLE CURRENT

VIN = 120 Volts, 100% Load

AFL12005D

1, 2, 3

AFL12012D

1, 2, 3

AFL12015D

1, 2, 3

CURRENT LIMIT POINT

Expressed as a Percentage

of Full Rated Load

LOAD FAULT POWER DISSIPATION

Overload or Short Circuit

1

2

3

1, 2, 3

VOUT = 90% VNOM , Current split

equally on positive and negative outputs.

Note 5

115

105

125

VIN = 120 Volts

VIN = 120 Volts, 100% Load

EFFICIENCY

1, 2, 3

AFL12005D

1, 2, 3

AFL12012D

1, 2, 3

AFL12015D

ENABLE INPUTS (Inhibit Function)

1, 2, 3

Logical Low on Pin 4 or Pin 12

Converter Off

Note 1

Sink Current

Converter On

1, 2, 3

Logical High on Pin 4 and Pin 12 - Note 9

Note 1

Sink Current

SWITCHING FREQUENCY

1, 2, 3

Note 1

Note 1

Input to Output or Any Pin to Case

(except Pin 3). Test @ 500VDC

Slight Variations with Case Style

MIL-HDBK-217F, AIF @ TC = 40°C

0.8

100

50

100

600

700

10

0.8

100

80

550

SYNCHRONIZATION INPUT

1, 2, 3

Frequency Range

1, 2, 3

Pulse Amplitude, Hi

Pulse Amplitude, Lo

1, 2, 3

Pulse Rise Time

Pulse Duty Cycle

ISOLATION

DEVICE WEIGHT

MTBF

1

100 MΩ

85 g

300 KHrs

For Notes to Specifications, refer to page 3

元器件交易网120XXD SeriesDynamic Characteristics -55°C < TCASE < +125°C, VIN=120V

unless otherwise specified.

Parameter

LOAD TRANSIENT RESPONSE

AFL12005D Amplitude

Either Output Recovery

Amplitude

Recovery

Group A

Subgroups

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

Amplitude

Recovery

Note 1, 2, 3

VIN Step = 80 ⇔ 160 Volts

Note 4

Enable 1, 2 on. (Pins 4, 12 high or

open)

Same as Turn On Characteristics.

MIL-STD-461D, CS101, 30Hz to 50KHz

Note 1

Note 2, 8

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

⇒ 50% 10%

⇒ 10% 50%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

10% ⇒ 50%

50% ⇒ 10%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

⇒ 50% 10%

50% ⇒ 10%

-500

50

75

Test Conditions

Min

-450

-450

-750

-750

-750

-750

500

500

250

120

mV

µs

mV

ms

Nom

Max

450

200

450

200

400

750

200

750

200

400

750

200

750

200

400

Unit

mV

µs

mV

µs

µs

mV

µs

mV

µs

µs

mV

µs

mV

µs

µs

AFL12012D Amplitude

Either Output Recovery

Amplitude

Recovery

AFL12015D Amplitude

Either Output Recovery

LINE TRANSIENT RESPONSE

Amplitude

Recovery

TURN-ON CHARACTERISTICS

Overshoot

Delay

LOAD FAULT RECOVERY

LINE REJECTION

50 60 dB

Notes to Specifications:Parameters not 100% tested but are guaranteed to the limits specified in the ry time is measured from the initiation of the transient to where Vout has returned to within ±1.0% ofVout at 50% transient transition time ≥ 100µ-on delay is measured with an input voltage rise time of between 100V and 500V per t limit point is that condition of excess load causing output voltage to drop to 90% of ter verified as part of another electrical tests are performed with the remote sense leads connected to the output leads at the transient transition time ≥ 10µ inputs internally pulled high. Nominal open circuit voltage ≈ current split equally between +Vout and - load must be distributed so that a minimum of 20% of the total output power is being provided by one ofthe regulation measured with load on tested output at 20% of maximum load while changing the load onother output from 20% to 80%.

元器件交易网120XXD SeriesBlock DiagramFigure I. AFL Dual Output+ INPUT1

INPUTFILTEROUTPUTFILTER

PRIMARYBIAS SUPPLY7

+ OUTPUT

ENABLE 14

CURRENTSENSE

8

OUTPUT RETURNOUTPUTFILTERSYNC OUTPUT5

CONTROLSYNC INPUT6

FB9

- OUTPUT

SHAREERRORAMP& REF

AMPLIFIER

11

12

10SHARE

ENABLE 2

OUTPUT

VOLTAGE TRIM

CASE3

INPUT RETURN2

Circuit Operation and Application InformationThe AFL series of converters employ a forward switchedmode converter topology. (refer to Figure I.) Operation ofthe device is initiated when a DC voltage whose magnitudeis within the specified input limits is applied between pins 1and 2. If pins 4 and 12 are enabled (at a logical 1 or open)the primary bias supply will begin generating a regulatedhousekeeping voltage bringing the circuitry on the primaryside of the converter to life. Two power MOSFETs used tochop the DC input voltage into a high frequency squarewave, apply this chopped voltage to the power this switching is initiated, a voltage is impressed on asecond winding of the power transformer which is thenrectified and applied to the primary bias supply. When thisoccurs, the input voltage is excluded from the bias voltagegenerator and the primary bias voltage becomes switched voltage impressed on the secondary outputtransformer windings is rectified and filtered to provide thepositive and negative converter output voltages. An erroramplifier on the secondary side compares the positive outputvoltage to a precision reference and generates an errorsignal proportional to the difference. This error signal ismagnetically coupled through the feedback transformer intothe control section of the converter varying the pulse widthof the square wave signal driving the MOSFETs, narrowingthe pulse width if the output voltage is too high and wideningit if it is too low. These pulse width variations provide thenecessary corrections to regulate the magnitude of outputvoltage within its’ specified e the primary portion of the circuit is coupled to thesecondary side with magnetic elements, full isolation frominput to output is gh incorporating several sophisticated and usefulancilliary features, basic operation of the AFL120XXDseriescan be initiated by simply applying an input voltage to pins 1and 2 and connecting the appropriate loads between pins 7,8, and 9. Of course, operation of any converter with highpower density should not be attempted before secureattachment to an appropriate heat dissipator. (See ThermalConsiderations, page 7)Inhibiting Converter Output (Enable)As an alternative to application and removal of the DC voltageto the input, the user can control the converter output byproviding TTL compatible, positive logic signals to either oftwo enable pins (pin 4 or 12). The distinction between thesetwo signal ports is that enable 1 (pin 4) is referenced to theinput return (pin 2) while enable 2 (pin 12) is referenced tothe output return (pin 8). Thus, the user has access to aninhibit function on either side of the isolation barrier. Eachport is internally pulled “high” so that when not used, anopen connection on both enable pins permits normalconverter operation. When their use is desired, a logical“low” on either port will shut the converter II. Enable Input Equivalent Circuit+5.6V100KPin 4 orPin 121N4148290K2N3904150KPin 2 orPin 5

元器件交易网120XXD SeriesInternally, these ports differ slightly in their function. In use,a low on Enable 1 completely shuts down all circuits in theconverter, while a low on Enable 2 shuts down the secondaryside while altering the controller duty cycle to near ally, the use of either port is transparent to the usersave for minor differences in idle current. (See specificationtable).which has been designated as the master oscillator providesa convenient frequency source for this mode of external synchronization is not indicted, the sync inpin should be left unconnected thereby permitting theconverter to operate at its’ own internally set sync output signal is a continuous pulse train set at550 ± 50KHz, with a duty cycle of 15 ± 5.0%. This signal isreferenced to the input return and has been tailored to becompatible with the AFL sync input port. Transition timesare less than 100ns and the low level output impedance isless than 50Ω. This signal is active when the DC inputvoltage is within the specified operating range and theconverter is not inhibited. This synch output has adequatedrive reserve to synchronize at least five additionalconverters. A typical synchronization connection option isillustrated in Figure onization of Multiple ConvertersWhen operating multiple converters, system requirementsoften dictate operation of the converters at a commonfrequency. To accommodate this requirement, the AFLseries converters provide both a synchronization input sync input port permits synchronization of an AFLconverter to any compatible external frequency sourceoperating between 500KHz and 700KHz. This input signalshould be referenced to the input return and have a 10% to90% duty cycle. Compatibility requires transition times lessthan 100ns, maximum low level of +0.8V and a minimumhigh

level of +2.0V. The sync output of another converterFigure III. Preferred Connection for Parallel OperationPowerInput1VinRtnCaseEnable 1Sync OutSync In6Enable 2Share12AFLTrim- OutputReturn+ Output7OptionalSynchronizationConnectionShare Bus1VinRtnCaseEnable 1Sync OutSync In6Enable 2Share12AFLTrim- OutputReturn+ Output7to Negative Loadto Positive Load1VinRtnCaseEnable 1Sync OutSync In6Enable 212AFLShareTrim- OutputReturn+ Output7(Other Converters)Parallel Operation-Current and Stress SharingFigure III. illustrates the preferred connection scheme foroperation of a set of AFL converters with outputs operatingin parallel. Use of this connection permits equal currentsharing among the members of a set whose load currentexceeds the capacity of an individual AFL. An importantfeature of the AFL series operating in the parallel mode isthat in addition to sharing the current, the stress induced bytemperature will also be shared. Thus if one member of aparalleled set is operating at a higher case temperature, thecurrent it provides to the load will be reduced ascompensation for the temperature induced stress on

元器件交易网n operating in the shared mode, it is important thatsymmetry of connection be maintained as an assurance ofoptimum load sharing performance. Thus, converter outputsshould be connected to the load with equal lengths of wire ofthe same gauge and should be connected to a commonphysical point, preferably at the load along with the converteroutput and return leads. All converters in a paralleled setmust have their share pins connected together. Thisarrangement is diagrammatically illustrated in Figure g the output and return pins connected at a starpoint which is located close as possible to the a consequence of the topology utilized in the currentsharing circuit, the share pin may be used for other applications requiring only a single converter, the voltageappearing on the share pin may be used as a “totall currentmonitor”. The share pin open circuit voltage is nominally+1.00V at no load and increases linearly with increasingtotal output current to +2.20V at full load. Note that the currentwe refer to here is the total output current, that is, the sumof the positive and negative outout l ConsiderationsBecause of the incorporation of many innovativetechnological concepts, the AFL series of converters iscapable of providing very high output power from a packageof very small volume. These magnitudes of power densitycan only be obtained by combining high circuit efficiencywith effective methods of heat removal from the die requirement has been effectively addressed inside thedevice; but when operating at maximum loads, a significantamount of heat will be generated and this heat must beconducted away from the case. To maintain the casetemperature at or below the specified maximum of 125°C,this heat must be transferred by conduction to anappropriate heat dissipater held in intimate contact with theconverter the effectiveness of this heat transfer is dependenton the intimacy of the baseplate/heatsink interface, it isstrongly recommended that a high thermal conductivity heattransferring medium is inserted between the baseplate andheatsink. The material most frequently utilized at the factoryduring all testing and burn-in processes is sold under thetrade name of Sil-Pad®

4001. This particular product is aninsulator but electrically conductive versions are alsoavailable. Use of these materials assures maximum surfacecontact with the heat dissipater thereby compensating forany minor surface variations. While other available types ofheat conductive materials and thermal compounds providesimilar effectiveness, these alternatives are often lessconvenient and can be somewhat messy to use.1Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, 120XXD SeriesA conservative aid to estimating the total heat sink surfacearea (AHEAT SINK) required to set the maximum casetemperature rise (∆T) above ambient temperature is givenby the following expression:A

⎧HEAT SINK

≈⎨∆T⎫−143.⎩80P0.85⎬⎭−3.0where∆T= Case temperature rise above ambient P= Device dissipation in Watts=P⎧1⎫OUT⎨⎩Eff−1⎬⎭As an example, assume that it is desired to operate anAFL12015D while holding the case temperature at TC ≤+85°C in an area where the ambient temperature is held toa constant +25°C; then∆T = 85 - 25 = 60°CFrom the Specification Table, the worst case full loadefficiency for this device is 83% @ 100 watts: thus, powerdissipation at full load is given byP=100•⎧⎨1⎩.83−1⎫⎬⎭=100•(0.205)=20.5Wand the required heat sink area isA =HEAT SINK⎧⎨60⎫−1.43⎩80•20.50.85⎬⎭−3.0=56.3 in2Thus, a total heat sink surface area (including fins, if any) of56 in2 in this example, would limit case rise to 60°C aboveambient. A flat aluminum plate, 0.25" thick and of approximatedimension 4" by 7" (28 in2 per side) would suffice for thisapplication in a still air environment. Note that to meet thecriteria in this example, both sides of the plate requireunrestricted exposure to the +25°C ambient air.7

元器件交易网120XXD SeriesInput FilterThe AFL120XXD series converters incorporate a singlestage LC input filter whose elements dominate the inputload impedance characteristic during the turn-on input circuit is as shown in Figure IV. Input Filter Circuit16.8uHPin 10.78uFPin 2Undervoltage LockoutA minimum voltage is required at the input of the converterto initiate operation. This voltage is set to 74 ± 4.0V. Topreclude the possibility of noise or other variations at theinput falsely initiating and halting converter operation, ahysteresis of approximately 7.0V is incorporated in thiscircuit. Thus if the input voltage droops to 67 ± 4.0V, theconverter will shut down and remain inoperative until theinput voltage returns to ≈ Voltage AdjustBy use of the trim pin (10), the magnitude of output voltagescan be adjusted over a limited range in either a positive ornegative direction. Connecting a resistor between the trimpin and either the output return or the positive output willraise or lower the magnitude of output voltages. The spanof output voltage adjustment is restricted to the limits shownin Table V. Connection for VOUT Adjustment12Enable 2ShareRADJAFL120xxD+ Sense- SenseReturn To Loads+ Vout7Connect Radj to + to increase, - to decrease8Table 1. Output Voltage Trim Values and LimitsAFL12005D AFL12012D AFL12015D

Vout Radj Vout Radj Vout Radj

5.5 0 12.5 0 15.5 0

5.4 12.5K 12.4 47.5K 15.4 62.5K

5.3 33.3K 12.3 127K 15.3 167K

5.2 75K 12.2 285K 15.2 375K

5.1 200K 12.1 760K 15.1 1.0M

5.0

∞ 12.0

∞ 15.0

∞

4.9 190K 11.7 975K 14.6 1.2M

4.8 65K 11.3 288K 14.0 325K

4.7 23K 10.8 72.9K 13.5 117K

4.6 2.5K 10.6 29.9K 13.0 12.5K

4.583 0 10.417 0 12.917 0

Note that the nominal magnitude of output voltage resides inthe middle of the table and the corresponding resistor valueis set to

∞. To set the magnitude greater than nominal, theadjust resistor is connected to output return. To set themagnitude less than nominal, the adjust resistor is connectedto the positive output. (Refer to Figure V.)For output voltage settings that are within the limits, butbetween those listed in Table I, it is suggested that theresistor values be determined empirically by selection or byuse of a variable resistor. The value thus determined canthen be replaced with a good quality fixed resistor forpermanent use of this adjust feature is elected, the user shouldbe aware that the temperature performance of the converteroutput voltage will be affected by the temperatureperformance of the resistor selected as the adjustmentelement and therefore, is advised to employ resistors with atight temperature coefficient of

元器件交易网120XXD Series Mechanical OutlinesCase X

3.0002.760Case W

Pin Variation of Case Y

ø 0.1280.0500.2500.250

0.0501270.25 typ127161.2601.5001.000Ref0.200 TypNon-cumPinø 0.0401.0002.5000.2200.2202.8000.525Pinø 0.0402.975 max0.238 max0.420.380Max0.380Max

Case Y

1.1500.300ø 0.1400.050Case Z

Pin Variation of Case Y

0.0500.2500.250161.5001.7502.001.000Ref0.200 TypNon-cumPinø 0.0401.000RefPinø 0.0400.2200.362.8000.5251.7502.5002.975 max0.238 max0.3750.2200.380Max0.380Max

Tolerances, unless otherwise specified: .XX = ±0.010

.XXX = ±0.005

BERYLLIA WARNING: These converters are hermetically sealed; however they contain BeO substrates and should not be ground or subjected to any otheroperations including exposure to acids, which may produce Beryllium dust or fumes containing 9

元器件交易网120XXD Series Pin DesignationPin #Designation101+ Input2Input Return3Case Ground4Enable 15Sync Output6Sync Input7+ Output8Output Return9 -Output10Output Voltage Trim11Share12Enable 2Standard Microcircuit Drawing Equivalence Table Standard Microcircuit IR Standard

Drawing Number Part Num

元器件交易网120XXD SeriesDevice ScreeningRequirementTemperature RangeElement EvaluationNon-Destructive

Bond PullInternal VisualTemperature CycleConstant AccelerationPINDBurn-InFinal Electrical( Group A )PDASeal, Fine and GrossRadiographicExternal VisualMIL-PRF-385342001, Y1 Axis20201015MIL-PRF-38534& SpecificationMIL-PRF-385341N/ACond AN/AN/ACond A, CN/AYesMIL-STD-883 MethodNo SuffixN/AN/AES

dN/AN/AYesCond B500 GsN/A48 hrs@hi temp

25°C

dHB CHN/AN/AYesCond C3000 GsN/A-55°C, +25°C,

+125°CN/ACond A, CN/AYesClass HN/AYesCond C3000 GsN/A-55°C, +25°C,

+125°C10%Cond A, CN/AYes-20°C to +85°C-55°C to +125°C

e-55°C to +125°C-55°C to +125°CcN/AN/AN/AN/A25°C160 hrs@125°C160 hrs@125°CcNotes:

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