APW7078 Просмотр технического описания (PDF) - Anpec Electronics

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APW7078

Single PWM Switching Controller

Anpec Electronics 

APW7078

Timing Diagram

FB input voltage

Short cirucit detect

comparator

Sawtooth wave output

Soft-start setting voltage

Output pin waveform

SCP detect voltage

SCP pin waveform

ON

Power supply control SW

OFF

ts

Soft

start

Output

short

circuit

tscp

Output short circuit

Output short

circuit

detection

Typical Characteristics (TA = 25°C, VDD = 3.3V, unless otherwise specified)

Supply Current vs. Supply Voltage

800

700

600

500

400

300

200

TA=25°C

100

RT=3.3kΩ

CT=270pF

0

1

2

3

4

5

Supply Voltage(V)

SHDN and Release

CH1=VOUT 2V/DIV TIME=20ms/DIV

CH2=VCTL 2V/DIV

CH3=Vss 0.5V/DIV

CH4=IL 1A/DIV

C opyright © ANPEC Electronics C orp.

6

Rev. A.3 - Nov., 2005

www.anpec.com.tw

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