DH321 데이터 시트보기 (PDF) - Fairchild Semiconductor

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DH321

Green Mode Fairchild Power Switch (FPS™)

Fairchild Semiconductor 

FSDH321, FSDL321

Internal Block Diagram

Vcc

Vstr

2

5

+

V BU R L/V BU RH

-

VBURH

VFB

3

Ipk

4

Vcc

Idelay

Vcc

IFB

8V/12V

Vcc

IB_PEAK

Normal

2.5R

R

Burst

Soft start

Vcc good

Freq.

Modulation

Istart

Vref

Internal

Bias

OSC

PWM

SQ

RQ

Gate

driver

LEB

Drain

6,7,8

VSD

Vcc

Vovp

TSD

Vcc good

SQ

RQ

AOCP

Vocp

1 GND

Figure 2. Functional Block Diagram of FSDx321

2

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