V11
1
︳
CFB400W SERIES
400W WATTS 4:1 INPUT
DC-DC CONVERTERS
SINGLE OUTPUT
FEATURE
S
* 400W Isolated Output
* Efficiency to 90%
* Fixed Switching Frequency
* Input Under Voltage Protection
* Over Temperature Protection
* Over Voltage/Current Protection
* Remote ON/OFF
* Full-Brick Size Meet Industry Standard
* Fully Isolated 1500VDC
* Without Tantalum Capacitor Inside
* CE Mark Meets 2004/108/EC
MODEL
NUMBER INPUT
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT CURRENT
INPUT CURRENT (%) EFF.
CAPACITIVE
LOAD MAX.
(4, 5, 6)
MIN. MAX. NO LOAD
FULL LOAD
(2)
(3)
CFB400W-24S05
9-36 VDC
5 VDC
0 mA 80 A 600 mA 19.05 A 86.5
87.5
10000uF
CFB400W-24S12
9-36 VDC
12 VDC
0 mA 33.3 A 120 mA 19.36 A 85
86
10000uF
CFB400W-24S24
9-36 VDC
24 VDC
0 mA 16.7 A 120 mA 19.19 A 88
87
4700uF
CFB400W-24S28
9-36 VDC
28 VDC
0 mA 14.3 A 120 mA 19.18 A 86.5
87
4700uF
CFB400W-24S48
9-36 VDC
48 VDC
0 mA 8.3 A 120 mA
19.19 A
85.5
86.5
2200uF
CFB400W-48S05
18-75 VDC
5 VDC
0 mA 80 A 300 mA 9.36 A 88.5
89
10000uF
CFB400W-48S12
18-75 VDC
12 VDC
0 mA 33.3 A 60 mA 9.41 A 88.5
88.5
10000uF
CFB400W-48S24
18-75 VDC
24 VDC
0 mA 16.7 A 60 mA 9.28 A 90
90
4700uF
CFB400W-48S28
18-75 VDC
28 VDC
0 mA 14.3A 60 mA 9.27 A 90.5
90
4700uF
CFB400W-48S48
18-75 VDC
48 VDC
0 mA 8.3 A 60 mA
9.27 A
88
89.5
2200uF
NOTE:
1. Nominal Input Voltage 24, 48 VDC.
2. Measured at 12VDC for 24Vin, 24VDC for 48Vin.
3. Measured at Nominal Input Voltage.
4. The output terminal of 12V, 24V, 28V Vout models required a minimum capacitor 330uF to
maintain specified regulation.
5. The output terminal of 5Vout models required a minimum capacitor 680uF to maintain
specified regulation.
6. The output terminal of 48Vout models required a minimum capacitor 100uF to maintain
specified regulation.
V11
2
SPECIFICATIONS
All Specifications Typical At Nominal Line, Full Load, and 25 Unless Otherwise Noted℃
INPUT SPECIFICATIONS: GENERAL SPECIFICATIONS:
Input Voltage Range ....……………............. 24V ............................ 9-36V
Efficiency .................…..................................……..........…....... See Table
48V ………............... 18-75V
Isolation Voltage ..................... Input/Output ....………..….. 1500VDC min.
Under Voltage Lockout ………..….. 24Vin power up ….…..……..…. 8.5V
Input/Case .…...........…….. 1500VDC min.
24Vin power down ………….…. 7.5V
Output/Case ………....…… 1500VDC min.
48Vin power up …….…...….…. 17V
Isolation Resistance .............................…............………..... 10
7
ohm min.
48Vin power down …………..… 15V
Isolation Capacitance …………………………………………… 4000pF typ.
Input Over Voltage Protection ….. 24Vin Turn off … 42V, Turn on ... 40V
Switching Frequency ....................…………….……....……… 230KHz typ.
48Vin Turn off … 83V, Turn on … 80V
Operating Case Temperature …………………....……........ -40 to 100℃ ℃
Opto Isolated Remote ON/OFF (note6)
Storage Temperature ……….………....…....……............ -55 to +1℃10℃
Input Filter …………………………………………………...……... LC Type
Thermal Shutdown Case Temp. .……….………………..……. 110 ℃typ.
OUTPUT SPECIFICATIONS:
Humidity .................................................... 95% RH max. Non condensing
Voltage Accuracy ........................................…………............ ±1.5% max.
MTBF ………. MIL-HDBK-217F, GB, 25℃, Full Load ……… 340Khrs typ.
Transient Response: 25% Step Load Change .……………..…… <500µs
Dimensions ..................... 4.60×2.40x0.50 inches (116.8x61.0×12.7 mm)
External Trim Adj. Range ………….…………………………….. 80-110%
Case Material ................….....…… Aluminum Baseplate with Plastic Case
Load share Accuracy …………………… ±10% at 50% to 100%Full Load
Weight …………………………………………………………………… 220g
Auxiliary Output Voltage/Current …………….…… 10±3Vdc/20mA max.
NOTE :
Ripple & Noise, 20MHz BW (note3)
1. Measured from high line to low line.
5V ……………...... 40mV RMS max., 100mV pk-pk max.
2. Measured from full load to zero load.
12V ……….…….... 60mV RMS max., 120mV pk-pk max.
3. Output ripple and noise measured with 10uF tantalum and 1uF
24V ……………... 100mV RMS max., 240mV pk-pk max.
ceramic capacitor across output.
28V ……………... 100mV RMS max., 280mV pk-pk max.
4. The output adjustment circuit and trim equations show as figure1 and
48V ………….….. 120mV RMS max., 480mV pk-pk max.
figure2.
Temperature Coefficient ....................………..............…..... ±0.03%/°C
5. An external input capacitor 1000uF for 24Vin or 330uF for 48Vin
Short Circuit Protection .........………………......................... Continuous
models are recommended to reduce input ripple voltage.
Line Regulation (note1) ……………….………..................…. ±0.2% max.
6. Standard model is negative logic , suffix “P” to the model number with
Load Regulation (note2) ………………………….........…....... ±0.5% max.
positive logic. (refer application note)
Over Voltage Protection Trip Range, % Vo nom. ..................... 115-140%
7
. If the remote sense feature is not to be used, the +sense pin should be
Current Limit .................…………………... 110% ~150% Nominal Output
connected to the +Vout pin and the –sense pin should be connected
Start up time …………………………………………………….. 120ms typ.
to the -Vout pin. (refer application note)
CASE FB
TRIM
PC/NC
AUX
IOG
16
15
13
14
-Vin
+Vin
+ON/OFF
-ON/OFF
-S
+S
-Vo
+Vo5 - 7
8 - 10
12
11
3
4
2
1
PIN NUMBER
PIN CONNECTIONS
FUNCTION
5
6
7
8
9
10
-Vo
-Vo
+Vo
-Vo
+Vo
+Vo
11
12
14
13
15
16
4
3
2
1
Mounting Inserts
3.5 Through 4Pl.
4.60[116.8]
0.50[12.7]
0.22[5.5]
ON/OFF
+Vin
-Vin
-S
+S
TRIM
PC/NC
IOG
AUX
-
+
0.199[5.05] 4.20[106.7]
1.701[13.20]
1.301[33.04]
0.901[22.88]
0.751[19.07]
4.099[104.11]
3.949[100.30]
3.799[96.49]
3.649[92.68]
3.499[88.87]
3.349[85.06]
2.40[61.0]
0.900[22.86]
0.400[10.16]
1.400[35.56]0.501[12.72]
0.20[5.1] 2.00[50.8]
2.251[57.17]
Tolerances Inches: .XX±0.02 .XXX±0.010 ±0.004
Millimeters: .X±0.5 .XX±0.25 ±0.1
All Dimensions In Inches(mm) Pin DIA
Output Voltage = TRIM
Terminal Voltage * Nominal
Output Voltage
Fig.2 The schematic of
output voltage adjusted by
using external DC voltage.
The output voltage can be determined by
below equations:
VfVRVoVout
Rt
Rt
Rt
Rt
Vf
×+=
+
×
+
+
×
×
=
)(
33
33
68.7
)
33
33
(24.1
Unit: KΩ
Vo: Nominal Output Voltage
Rt=6.8KΩ
Fig.1 The schematic of output voltage adjusted
by using external resistor and/or variable
resistor.
