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부품번호 AFL12005S 기능
기능 HIGH RELIABILITY HYBRID DC/DC CONVERTERS
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AFL12005S 데이터시트, 핀배열, 회로
www.DataSheet4U.com
PD - 94447B
ADVANCED ANALOG
HIGH RELIABILITY
HYBRID DC/DC CONVERTERS
AFL120XXS SERIES
120V Input, Single Output
Description
The AFL Series of DC/DC converters feature high power
density with no derating over the full military tempera-
ture 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, multiple converters can be operated in parallel.
The internal current sharing circuits assure equal cur-
rent distribution among the paralleled converters. This
series incorporates Advanced Analog’s proprietary mag-
netic pulse feedback technology providing optimum
dynamic line and load regulation response. This feed-
back system samples the output voltage at the pulse
width modulator fixed clock frequency, nominally 550
KHz. Multiple converters can be synchronized to a sys-
tem 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 mod-
els.
These converters are hermetically packaged in two en-
closure variations, utilizing copper core pins to mini-
mize resistive DC losses. Three lead styles are avail-
able, each fabricated with Advanced Analog’s rugged
ceramic lead-to-package seal assuring long term
hermeticity in the most harsh environments.
AFL
Features
n 80 To 160 Volt Input Range
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 87%
n Full Military Temperature Range
n Continuous Short Circuit and Overload
Protection
n Remote Sensing Terminals
n Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 50 dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Dual Output Versions Available
n Standard Military Drawings Available
Manufactured in a facility fully qualified to MIL-PRF-
38534, 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-PRF-
38534 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 de-
www.irf.com
manding applications. Variations in electrical, me-
chanical and screening can be accommodated.
Contact Advanced Analog for special require-
ments.
1
09/10/02




AFL12005S pdf, 반도체, 판매, 대치품
AFL120XXS Series
Dynamic Characteristics -55°C < TCASE < +125°C, VIN=120V unless otherwise specified.
Parameter
Group A
Subgroups
Test Conditions
Min Nom Max
Unit
LOAD TRANSIENT RESPONSE
AFL12005S
Amplitude
Recovery
Amplitude
Recovery
AFL12008S
Amplitude
Recovery
Amplitude
Recovery
AFL12009S
Amplitude
Recovery
Amplitude
Recovery
AFL12012S
Amplitude
Recovery
Amplitude
Recovery
AFL12015S
Amplitude
Recovery
Amplitude
Recovery
AFL12028S
Amplitude
Recovery
Amplitude
Recovery
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
Note 2, 8
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%
-450
-450
-500
-500
-600
-600
-750
-750
-750
-750
-1200
-1200
450
200
450
400
500
200
500
400
600
200
600
400
750
200
750
400
750
200
750
400
1200
200
1200
400
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
mV
µSec
LINE TRANSIENT RESPONSE
Amplitude
Recovery
TURN-ON CHARACTERISTICS
Overshoot
Delay
Note 1, 2, 3
VIN Step = 80 160 Volts
4, 5, 6
4, 5, 6
VIN = 30, 50, 80 Volts. Note 4
Enable 1, 2 on. (Pins 4, 12 high or
open)
-500
500 mV
500 µSec
250 mV
50 75 120 mSec
LOAD FAULT RECOVERY
Same as Turn On Characteristics.
LINE REJECTION
MIL-STD-461D, CS101, 30Hz to
50KHz
Note 1
50 60
dB
Notes to Specifications:
1. Parameters not 100% tested but are guaranteed to the limits specified in the table.
2. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of VOUT at 50% load.
3. Line transient transition time 100 µSec.
4. Turn-on delay is measured with an input voltage rise time of between 100 and 500 volts per millisecond.
5. Current limit point is that condition of excess load causing output voltage to drop to 90% of nominal.
6. Parameter verified as part of another test.
7. All electrical tests are performed with the remote sense leads connected to the output leads at the load.
8. Load transient transition time 10 µSec.
9. Enable inputs internally pulled high. Nominal open circuit voltage 4.0VDC.
4 www.irf.com

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AFL12005S 전자부품, 판매, 대치품
AFL120XXS 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 out-
puts should be connected to the load with equal lengths of
wire of the same gauge and sense leads from each con-
verter 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 out-
puts 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 func-
tions. In applications requiring a single converter, the volt-
age 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.
A conservative aid to estimating the total heat sink surface
area (AHEAT SINK) required to set the maximum case temp-
erature rise (T) above ambient temperature is given by
the following expression:
A
HEAT SINK
T
80P 0.85
1.43
3.0
where
T = Case temperature rise above ambient
1
P=
Device
dissipation
in
Watts
=
POUT
Eff
1
As an example, it is desired to maintain the case tempera-
ture of an AFL27015S at £ +85°C in an area where the
ambient temperature is held at a constant +25°C; then
T = 85 - 25 = 60°C
Thermal Considerations
Because of the incorporation of many innovative techno-
logical 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 effec-
tive methods of heat removal from the die junctions. This
requirement has been effectively addressed inside the de-
vice; 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 tem-
perature at or below the specified maximum of 125°C, this
heat must be transferred by conduction to an appropriate
heat dissipater held in intimate contact with the converter
base-plate.
From the Specification Table, the worst case full load effi-
ciency for this device is 83%; therefore the power dissipa-
tion at full load is given by
P
=
120
 1
.83
1
=
120
(
0.205)
=
24.6W
and the required heat sink area is
A
HEAT SINK
=
80
60
24.60.85
1.43
3.0
=
71 in2
Because effectiveness of this heat transfer is dependent
on the intimacy of the baseplate/heatsink interface, it is st-
rongly recommended that a high thermal conductivity heat
transferance medium is inserted between the baseplate a-
nd heatsink. The material most frequently utilized at the fa-
ctory during all testing and burn-in processes is sold under
the trade name of Sil-Pad4001 . This particular pro duct
is an insulator but electrically conductive versions are also
available. Use of these materials assures maximum surfa-
ce contact with the heat dissipator thereby compensating
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 convenient and are frequently messy to use.
Thus, a total heat sink surface area (including fins, if any) of
71 in2 in this example, would limit case rise to 60°C above
ambient. A flat aluminum plate, 0.25" thick and of approxi-
mate 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

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