FL7930B Просмотр технического описания (PDF) - ON Semiconductor

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производитель

FL7930B

Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting

ON Semiconductor 

Internal Block Diagram

VCC

VREF

VBIAS

VCC

2.5VREF

H:open

Internal

Bias

reset

ZCD 5

INV 1

COMP 3

OVP 2

-

+

VTH(ZCD)

THD

Optimized

Sawtooth

Generator

Control Range

Compensation

+

-

Overshoot-less

Control

VREF

VREF

Stair

Step

-

+

Clamp

Circuit

reset

Restart

Tmer

SQ

RQ

fMAX

Limit

VIN Absent

disable

-

VREF

+

INV_open

OVP

0.35 0.45

VOVP,LH

+

-

disable

2.5 2.88

disable

2.5 2.675

Figure 3. Functional Block Diagram

8.5 12

8 VCC

-

VZ

+

VTH(S/S)

VCC

Gate

Driver

VO(MAX)

7 OUT

+

-

VCS_LIM

40kW

8pF

4 CS

6 GND

Thermal

Shutdown

© 2010 Fairchild Semiconductor Corporation

FL7930B • Rev. 1.0.4

3

www.fairchildsemi.com

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