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CFB400W-24S28

400W WATTS 4:1 INPUT DC-DC CONVERTERS SINGLE OUTPUT

Unspecified 

SPECIFICATIONS

All Specifications Typical At Nominal Line, Full Load, and 25℃ Unless Otherwise Noted

INPUT SPECIFICATIONS:

Input Voltage Range....……………............. 24V ................. 9-36V

48V................. 18-75V

Under voltage lockout ………..….. 24Vin power up ….…..……..…. 8.5V

24Vin power down ………….….7.5V

48Vin power up ……… ..….….17V

48Vin power down ………….…15V

Input over voltage protection……..…24Vin Turn off…42V,Turn on.…40V

48Vin Turn off…83V,Turn on…80V

Opto isolated Remote ON/OFF

Input Filter ………………………………………………..….……... PI Type

OUTPUT SPECIFICATIONS:

Voltage Accuracy : ........................................………….......... ±1.5% max.

Transient Response:25% Step Load Change .………………<500u sec.

External Trim Adj. Range ………….……. ..................80-110%

Load share Accuracy(5)…………………±10% at 50% to 100%Full Load

Auxiliary output voltage/current………………10±3Vdc/20mA max.

Ripple & Noise, 20MHz BW

5V ……….…….... 40mV RMS max., 100mV pk-pk max

12V ……….…….... 60mV RMS max., 120mV pk-pk max.

24V ……….……... 100mV RMS max., 240mV pk-pk max.

28V ……….……... 100mV RMS max., 280mV pk-pk max.

48V ……….….….. 120mV RMS max., 480mV pk-pk max.

Temperature Coefficient....................………..............…..... ±0.03%/°C

Short Circuit Protection.........……………….........................Continuous

Line Regulation(1) ………………….………..................…. ±0.2% max.

Load Regulation(2) …………………………….........…...... ±0.5% max.

Over Voltage Protection trip Range ,% Vo nom. ..................115-140%

Current Limit .................………………....110% ~150% Nominal Output

Start up time………………………………………………………..120ms typ.

CASE FB

GENRAL SPECIFICATIONS:

Efficiency.................…..................................……..........….......See Table

Isolation Voltage .....................Input/Output....………..….. 1500VDC min.

Input/Case.……….………..1500VDC min.

Output/Case……………… 1500VDC min.

Isolation Resistance .............................…............…….... 10^7 ohm min.

Isolation Capacitance…………………………………………………TBD Typ

Switching Frequency ....................…………….……..………230kHz, Typ.

Operating Case Temperature …………………....……........ -40℃ to 100℃

Storage Temperature ……………....…....……............ -55℃ to +110℃

Thermal Shutdown, Case Temp. .……………………..……. 110℃ Typ.

Humidity......................................................95% RH max. Non condensing

MTBF……….MIL-HDBK-217F………..……………………………T.B.D. hrs

Dimensions ........................ 4.60×2.40x0.50 inches(116.8x61.0×12.7 mm)

Case Material ................…......……Aluminum Baseplate with Plastic Case

Weight……………………………………………………………………..220 g

NOTE :

1. Measured From High Line to Low Line

2. Measured From Full Load to Zero Load

3. Output Ripple and Noise measured with 10uF tantalum and 1uF

Ceramic capacitor across output

4. The output adjustment circuit and trim equations show as figure1

and figure2.

T5.hAeninepxuttetrenraml inpaul rteccaopmacmiteonrd10to00puaFraflloerl 2w4itVhin22o0r u3F30fourF4f8oVr i4n8aVnind

models are recommended to reduce input ripple voltage.

The output voltage can be determined by

below equations:

Rt × 33

1.24 × (

)

Vf =

Rt + 33

Rt × 33

7.68 +

Rt + 33

Vout = (Vo + VR) × Vf

Unit: KΩ

Vo: Nominal Output Voltage

Fig.1 The schematic of output voltage

adjusted by using

variable resistor.

external

resis2tor

and/or

Output Voltage = TRIM

Terminal Voltage * Nominal

Output Voltage

Fig.2 The schematic of

output voltage adjusted by

using external DC voltage.

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