FA Series
Rev C
250-300 Watt
Single Output
Full Brick DC/DC Converter
FEATURES
●
100% Burn In
●
Synchronizable
●
Output Trim ±10%
●
1500VDC Isolation
●
Operation to No Load
●
Very Low Output Ripple
●
Output Current up to 60A
●
Fast Transient Response
●
Fixed Switching Frequency
●
250-300 Watts Output Power
●
Remote Sense Compensation
●
UL 60950 / CE Mark (Pending)
●
Remote ON/OFF (Active High/Low)
●
Short Circuit and Over Temperature Protection
●
90% Efficient at Half Load, 88% Efficient at Full Load
●
Optional Chassis Mount Version Available (See CMFA Series)
DESCRIPTION
The FA series is a high-density full brick converter that
incorporates the desired features required in today’s
demanding low voltage bus applications. Its unique dual
interleaved phase-shifted topology minimizes both input
and output noise. When performance, reliability, and low
cost are needed, the FA series delivers.
SPECIFICATIONS:
FA Series
All specifications apply @ 25°C ambient unless otherwise noted
INPUT SPECIFICATIONS
Input Voltage Range .................................................................. 10-36VDC
UVLO Turn On at .....................................................................10VDC max
UVLO Turn off at .....................................................................9.5VDC max
Input Filter ................................1,000µF low ESR capacitor recommended
Input Surge Voltage (100ms) ...........................................................50VDC
Reflected Ripple Current (nominal Vin and full load) .........................20mA
Remote ON/OFF ................................................. See Technical Datasheet
Input Current under Remote Off ..........................................................1mA
Maximum Input Current (Low Line)....................................................... 35A
No Load Input Current ......................................................................... 0.1A
PROTECTION SPECIFICATIONS
Current Limit ........................................................................................ 130%
Short Circuit Protection........................................Continuous, self re-setting
Over Temperature Protection ......................................110°C, self re-setting
GENERAL SPECIFICATIONS
Efficiency .................................................................................... 90% typical
Switching Frequency .................................................................700KHz typ.
Isolation Voltage (Input to Output)......................................... 1500VDC min.
Isolation Resistance ...................................................................... 1GΩ min.
Isolation Capacitance ........................................................................ 0.01µF
OUTPUT SPECIFICATIONS
Output Voltage ..............................................................................see table
Voltage Accuracy ................................................................................. ±1%
Output Adjustability ............................................................................ ±10%
Output Current ..............................................................................see table
Output Power ................................................................................see table
Line Regulation (LL to HL at FL)....................................................... ±0.2%
Load Regulation (NL to FL)............................................................... ±0.2%
Ripple/Noise (20 MHz BW) .................................................... 1% Vout max
Temperature Coefficient ................................................. ±0.02% / °C max.
Transient Response (50% load step).............................. 5% total deviation
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature (ambient) ........................... -40°C ~ +100°C (case)
Storage Temperature .......................................................... -55°C ~ +125°C
Humidity...................................................................fully potted construction
Cooling ..........................................................heatsink optional (see Note 4)
MTBF.................................................................................. 2,212,456 hours
PHYSICAL SPECIFICATIONS
Weight .................................................................................................. 218g
Dimensions.............................................................. 4.6 x 2.4 x 0.50 inches
Case Material ....................................................................... Aluminum alloy
Shielding......................................................................................... six-sided
SAFETY
Approvals and Standards ..............................UL60950 / CE Mark (pending)
Due to advances in technology, specifications subject to change without notice
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 4
FA Series
Rev C
250-300 Watt
Single Output
Full Brick DC/DC Converter
OUTPUT VOLTAGE / CURRENT RATING CHART
Model Number for Model Number for
Threaded Inserts Thru-Hole Inserts
FA12S43-250
FA12S48-250
FA12S5-300
FA12S12-300
FA12S15-300
FA12S20-300
FA12S24-300
FA12S26-300
FA12S28-300
FA12S43-250TH
FA12S48-250TH
FA12S5-300TH
FA12S12-300TH
FA12S15-300TH
FA12S20-300TH
FA12S24-300TH
FA12S26-300TH
FA12S28-300TH
12 VDC
(10 - 36 VDC)
Input Voltage Range
Output Voltage Output Current
43 VDC
48 VDC
5 VDC
12 VDC
15 VDC
20 VDC
24 VDC
26 VDC
28 VDC
5.814A
5.208A
60A
25A
20A
15A
12.5A
11.538A
10.714A
Output Power
250W
250W
300W
300W
300W
300W
300W
300W
300W
Technical
Datasheet
-
View PDF
View PDF
View PDF
View PDF
-
View PDF
-
-
NOTES
1. Pin to pin tolerance ± 0.01" [±0.3mm]. Pin diameter tolerance ±0.005" [±0.13mm].
2. Case material: 0.040" [1.02mm] thick, aluminum alloy 3003-0, Per: QQA 250/2.
3. Unit comes with either 3M x 0.5 threaded thru inserts or for 0.125 thru-hole add "TH" suffix to the model part
number. Ex: FA12S24-300TH.
4. For Heat sink add “HS” suffix to the model part number. Ex: FA12S24-300HS.
5. Active High Enable is standard; for Active Low Enable add “R” suffix to the model number. Ex: FA12S24-300R.
6. See CMFA Series for chassis mount version.
DERATING CURVE
FA12S24-300 MAX AMBIENT vs OUTPUT POWER
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 2 of 4
FA Series
Rev C
250-300 Watt
Single Output
Full Brick DC/DC Converter
MECHANICAL DRAWING
Unit: inches [mm]
HEATSINK SUPPLIED ATTACHED WITH
THERMAL INTERFACE MATERIAL.
HEATSINK HAS Ø.120 ±.005 Ø3.05±0.13 THRU HOLE 6X
.84±.04 [21.3±1.0]
.02 [0.4] 6X REF
COVER TO STANDOFF
HEATSINK
TO STANDOFFS ONLY
SEE NOTE 5
.000 [0.00]
.20 MIN [5.1 MIN]
SEE NOTE-1&3
PIN LENGTH FROM
STANDOFFS ONLY
.015 [0.38]
.02 [0.4] 6X REF
COVER TO STANDOFF
STANDARD
.50+.03 12.7 +0.8
-.00
-0.0
TO STANDOFFS ONLY
.000 [0.00]
.20 MIN [5.1 MIN]
SEE NOTE-1&3
PIN LENGTH FROM
STANDOFFS ONLY
.30 [7.6]
LABEL
.30+.02 7.6+0.5
-.03
-0.6
SERIAL NO:
DOT DENOTES
PIN-1
DC/DC CONVERTER
3.600 [91.44]
1.800 [45.72]
SEE NOTE-4
.50 [12.7]
.35 [8.9]
1
2
3
4
5
8
9
6
2.100 [53.34]
.000 [0.00]
EXETER, NH 03833
MODEL NAME
.400 [10.16]
.700 [17.78]
1.000 [25.40]
1.400 [35.56]
7
WALL INDUSTRIES
XXXX
DATE CODE
4.60 +.02 117.0+0.5
-0.8
-.03
.20±.03 [5.1±0.8]
4.200 [106.68]
2.40+.02 61.0+0.5
-.03
-0.8
R
NONMETALLIC INSULATOR 2X
PIN DESIGNATION
1
+OUT
2
+SENSE
3
TRIM
4
-SENSE
5
-OUT
6
+IN
7
SD
8
SYNC
9
-IN
PIN Ø
Ø.081 [2.06]
Ø.040 [1.02]
Ø.040 [1.02]
Ø.040 [1.02]
Ø.081 [2.06]
Ø.081 [2.06]
Ø.040 [1.02]
Ø.040 [1.02]
Ø.081 [2.06]
NOTES:
1. PIN TO PIN TOLERANCE ± .01 [±0.3],
PIN DIAMETER TOLERANCE: ±.005 [±0.13].
2. CASE MATERIAL: .040 [1.02] THICK, ALUMINUM ALLOY 3003-0,
PER: QQA 250/2.
3. UNLESS OTHERWISE SPECIFIED.
TO ORDER:
4. UNIT COMES WITH EITHER 3M x 0.5 THREADED
THRU INSERTS OR FOR Ø.125 THRU-HOLE ADD:
“TH” SUFFIX TO MODEL PART NUMBER.
EXAMPLE: FA12S24-300TH
5. FOR HEAT SINK ADD: “HS” SUFFIX TO MODEL
PART NUMBER. EXAMPLE: FA12S24-300HS.
6. OPTIONAL CHASSIS MOUNT VERSION
AVAILABLE (SEE CMFA SERIES).
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 3 of 4
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