MB3775PF 데이터 시트보기 (PDF) - Fujitsu

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MB3775PF

BIPOLAR SWITCHING REGULATOR CONTROLLER

Fujitsu 

■ TEST CIRCUIT

0.1 µF

SW

CPE

TEST

INPUT VCC=6 V

4.7 kΩ

4.7 kΩ

16 15 14 13 12 11 10 9

MB3775

12 3 45 6 7 8

330 pF

15 kΩ

TEST

INPUT

MB3775

OUTPUT 1

OUTPUT 2

■ TIMING CHART (Internal Waveform)

Error Amp output

Triangular waveform oscillator output

Dead Time PWM

input voltage

1.9 V

1.5 V

1.3 V

Short circuit protection

comparator Reference

1.1 V

input

PWM comparator

“High”

output

“Low”

Output Transistor

collector waveform

“High”

“Low”

SCP Terminal

waveform

0.6 V

0V

Short circuit protection “High”

comparator output

“Low”

Power supply voltage 3.6 V

(VCC : Min Value)

0V

LOCK-OUT

LOCK-OUT CANCEL

2.8 V (Typ Value)

DEAD TIME 100%

tPE

Protection Enable Time tPE =: 0.6 x 106 x CPE (s)

7

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