1
︳
CHB350 SERIES
231 TO 350 WATT 2:1 INPUT
DC-DC CONVERTERS
SINGLE OUTPUT
FEATURE
*231 - 350W Isolated Output
* Efficiency to 92.5%
* Fixed Switching Frequency
* Input under-voltage Protection
* Over Temperature Protection
* Over Voltage/Current Protection
* Remote ON/OFF
* Industry Standard Half-Brick Package
* Fully Isolated 1500VDC
OUTPUT CURRENT INPUT CURRENT MODEL
NUMBER
INPUT
VOLTAGE
OUTPUT
VOLTAGE MIN. MAX. NO LOAD FULL LOAD
EFF.
(%)
CAPACITIVE
LOAD MAX.
CHB350-24S3V3 18-36VDC 3.3VDC 0mA 70A 130mA 10.94A 88 10000μF
CHB350-24S05 18-36VDC 5VDC 0mA 70A 250mA 16.29A 89.5 10000μF
CHB350-24S12 18-36VDC 12VDC 0mA 29.2A 220mA 15.96A 91.5 10000μF
CHB350-24S24 18-36VDC 24VDC 0mA 14.6A 40mA 16.22A 90 10000μF
CHB350-24S28 18-36VDC 28VDC 0mA 12.5A 50mA 16.03A 91 7000μF(2)
CHB350-48S3V3 36-75VDC 3.3VDC 0mA 70A 80mA 5.41A 89 10000μF
CHB350-48S05 36-75VDC 5VDC 0mA 70A 120mA 8.01A 91 10000μF
CHB350-48S12 36-75VDC 12VDC 0mA 29.2A 100mA 7.89A 92.5 10000μF
CHB350-48S24 36-75VDC 24VDC 0mA 14.6A 40mA 7.98A 91.5 10000μF
CHB350-48S28 36-75VDC 28VDC 0mA 12.5A 30mA 7.88A 92.5 7000μF(2)
NOTE: 1. Nominal Input Voltage 24, 48 VDC
2. The output terminal of 28Vout models required a minimum capacitor 100uF to maintain
specified regulation.
2
ON/ OFF (2)
-VIN (4)
HIGH SIGNAL HE RE
D ISAB LE OUTPUT
SPECIFICATIONS
All Specifications Typical At Nominal Line, Full Load, and 25℃ Unless Otherwise Noted
INPUT SPECIFICATIONS: GENRAL SPECIFICATIONS:
Input Voltage Range ..……………............ 24V ................. 18-36V Efficiency .................…..................................……........…....... See Table
48V ……………… 36-75V Isolation Voltage ................ Input/Output ....………..….. 1500VDC min.
Input Surge Voltage (100ms max.) .…………. 24V ............. 50Vdc max. Input/Case, Output/Case ….. 1500VDC min.
48V ….…… 100Vdc max. Isolation Resistance .............................…............…….... 10^7 ohm min.
Under voltage lockout ………..….. 24Vin power up ….…..……..…. 17V Isolation Capacitance …………………..……………………… 1000pF Typ.
24Vin power down …………..…. 16V Switching Frequency ......................... 3V3&5V ..................... 300KHz Typ.
48Vin power up ……………...…. 35V 12V&24V&28V ….…... 330kHz Typ.
48Vin power down …………..…. 33V Operating Case Temperature ..………....….....……........ -40℃ to 100℃
Positive Logic Remote ON/OFF ( see note 4 & 5 ) Storage Temperature ……….………....…....……............ -55℃ to +105℃
Input Filter ………………………………………………..….……... PI Type Thermal Shutdown, Case Temp …..……………………..……. 110℃ Typ.
OUTPUT SPECIFICATIONS:
Humidity .................................................... 95% RH max. Non condensing
Voltage Accuracy: ........................................………….......... ±1.5% max. MTBF……….MIL-STD-217F, GB ..………..…………………… T.B.D. hrs
Transient Response:25% Step Load Change .……………… <500u sec. Dimensions ......................... 2.28×2.40x0.52 inches (57.9x61.0×13.2 mm)
External Trim Adj. Range, (note6) …………………………….……. ±10% Case Material ................….....…… Aluminum Baseplate with Plastic Case
Ripple & Noise, 20MHz BW Weight ………………………………………………………………….... 114g
3.3V & 5V ………….….…….... 40mV RMS, max. NOTE:
100mV pk-pk, max. 1. Measured From High Line to Low Line
12V …….……………….……. 60mV RMS, max. 2. Measured From Full Load to Zero Load
120mV pk-pk, max 3. Output Ripple and Noise measured with 10uF tantalum and 1uF
24V &28V……………..…… 100mV RMS, max. Ceramic capacitor across output
280mV pk-pk, max 4. Logic Compatibility ……………... Open Collector ref to -Input
Temperature Coefficient ....................………..............…..... ±0.03%/°C Module ON ………. >3.5Vdc to 75Vdc or Open Circuit
Short Circuit Protection .........………………......................... Continuous Module OFF ……….. < 1.2Vdc
Line Regulation (note 1) ……………….………..................…. ±0.2% max. 5. Suffix "N" to the Model Number with Negative Logic Remote ON/OFF
Load Regulation (note 2) ………………………….........…...... ±0.2% max. Module ON ………. < 1.2Vdc
Over Voltage Protection trip Range ,% Vo nom. .................. 115-140% Module OFF ……….. >3.5Vdc to 75Vdc or Open Circuit
Current Limit .................……………….... 105% ~140% Nominal Output 6. Trim-up…………..connect a resistor between the trim pin and +Sense
Start up time ………………………………………..………….. 175ms typ. Trim-down…….….connect a resistor between the trim pin and -Sense
7.The input terminal recommend to parallel with 220uF for 48Vin and
470uF for 24Vin ESR<0.7Ω to reduce the input ripple voltage.
CASE HB
Tolerances Inches: X.XX= ±0.02 , X.XXX= ±0.010
Millimeters: X.X= ±0.5 , X.XX=±0.25
BOTTOM VIEW
All Dimensions In Inches(mm)
Mounting Inserts
M3*0.5 Through 4pl.
1
-Sense
-Vout
-Vin
CASE
ON/OFF
+Vout
+Sense
Trim
8
7
9
6
2
5
4
3
+Vin
Function
Pin
REMOTE ON/OFF CONTROL EXTERNAL OUTPUT TRIM
