Irf AFL27003R3S Service Manual

www.DataSheet4U.com
PD - 94462E
AFL27003R3S
HIGH RELIABILITY HYBRID DC/DC CONVERTER
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 International Rectifier’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 International Rectifier’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, 3.3V Output
AFL
Features
n 160 To 400 Volt Input Range n 3.3 Volt Output n High Power Density - 46 W / in n 66 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 74% 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 > 60 dB - DC to 50KHz n External Synchronization Port n Fault Tolerant Design n Dual Output Versions Available n Standard Military Drawings Available
demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact IR Santa Clara for special requirements.
3
www.irf.com 1
09/01/04
AFL27003R3S
Specifications
ABSOLUTE MAXI MUM RATI NGS
Input Voltage -0.5V to 500V
Soldering Temperature 300°C for 10 seconds
Case Temperature Operating -55°C to +125°C
Electrical Performance Characteristics -55°C < T
Parameter
INPUT VOLTAGE Note 6 160 270 400 V
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
MAXIMUM CAPACITIVE LOAD
OUTPUT VOLTAGE TEMPERATURE COEFFICIENT
OUTPUT VOLTAGE REGULATION
Line
Load
OUTPUT RIPPLE VOLTAGE
INPUT CURRENT
No Load
Inhibit 1 Inhibit 2
INPUT RIPPLE CURRENT
CURRENT LIMIT POINT
Expressed as a Percentage of Full Rated Load
LOAD FAULT POWER DISSIPATION
Overload or Short Circuit
EFFICIENCY
SWITCHING FREQUENCY
ISOLATION
MTBF
For Notes to Specifications, refer to page 3
Storage -65°C to +135°C
< +125°C, 160V< V
CASE
Group A
Subgroups
VIN = 270 Volts, 100% Load
1
2, 3
VIN = 160, 270, 400 Volts, Note 6
Note 6 66 W
4 Note 1 10,000
VIN = 270 Volts, 100% Load - Note 1, 6
1, 2, 3
1, 2, 3
1, 2, 3
2, 3 1, 2, 3 1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3 500 550 600 KHz
No Load, 50% Load, 100% Load VIN = 160, 270, 400 Volts
VIN = 160, 270, 400 Volts, 100% Load, BW = 10MHz
VIN = 270 Volts
1
I
= 0
OUT
Pin 4 Shorted to Pin 2 Pin 12 Shorted to Pin 8
VIN = 270 Volts, 100% Load
B.W. = 10MHz
V
= 90% V
OUT
1 2 3
V
= 270 Volts
IN
VIN = 270 Volts, 100% Load
1 Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
MIL-HDBK-217F, AIF @ TC = 40°C
Test Conditions
Note 5
NOM
< 400V unless otherwise specified.
IN
Min Nom Max Unit
3.27
3.23
-0.015 +0.015 %/°C
-10.0
-35.0
115 105 125
72
100
300 KHrs
3.30
20 A
74
3.33
3.37
+10.0
+35.0
30 mVpp
15.0
17.0
3.00
5.00
60 mApp
125 115 140
30
V
V
µfd
mV
mV
mA mA mA mA
% % %
W
%
M
2 www.irf.com
Elecrical Performance Characteristics (Continued)
AFL27003R3S
Parameter
ENABLE INPUTS
Sink Current Converter On Sink Current
SYNCHRONIZATION INPUT
Pulse Amplitude, Hi Pulse Amplitude, Lo Pulse Rise Time Pulse Duty Cycle
LOAD TRANSIENT RESPONSE
Amplitude
Recovery
Amplitude Recovery
LINE TRANSIENT RESPONSE
Amplitude Recovery
TURN-ON CHARACTERISTICS
Overshoot Delay
LOAD FAULT RECOVERY
LINE REJECTION
Notes to Specifications:
(Inhibit Function)
Converter Off
Frequency Range
Group A
Subgroups
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
Logical Low, Pin 4 or Pin 12 Note 1 Logical High, Pin 4 and Pin 12 - Note 9 Note 1
Note 1 Note 1
Note 2, 8
Load Step 50% ⇔ 100%
Load Step 10% 50%
Note 1, 2, 3
VIN Step = 160 400 Volts
VIN = 160, 270, 400 Volts. Note 4
Enable 1, 2 on. (Pins 4, 12 high or open)
Same as Turn On Characteristics.
MIL-STD-461, CS101, 30Hz to 50KHz
Note 1
Test Conditions
Min Nom Max Unit
-0.5
2.0
75
500
2.0
-0.5
20
-450
-450
-500
50
60 70 dB
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 V
has returned to within ±1% of V
OUT
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.
0.8
100
50
100
700
10
0.8
100
80
450 200
450 400
500 500
250 120
V
µ
A
V
µA
KHz
V V
nSec
%
mV
µSec
mV
µ
Sec
mV
µSec
mV
mSec
OUT
www.irf.com 3
Loading...
+ 6 hidden pages