MB3889 데이터 시트보기 (PDF) - Fujitsu

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MB3889

2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

Fujitsu 

MB3889

s SETTING THE OUTPUT VOLTAGE

VO

R1

(−INE2) 15

1

−INE1

R2

(CS2) 13

CS1

3

Error Amp VO (V) = 1.23

−

R2

+

+

(R1 + R2)

1.23 V

< CH1, CH2 >

s SETTING THE TRIANGULAR OSCILLATION FREQUENCY

The triangular oscillation frequency is determined by the timing capacitor connected to the timing resistor (RT)

connected to the RT terminal (pin 5).

Triangular oscillation frequency: fOSC

fOSC (kHz) =:

14100

RT (kΩ)

17

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