UCC2819, UCC3819

PROGRAMMABLE OUTPUT

POWER FACTOR PREREGULATOR

SLUS482B - APRIL 2001 − REVISED DECEMBER 2004

7

www.ti.com

APPLICATION INFORMATION

UDG−01008

1

11

7

16

GND

DRVOUT

R17

15

C3

C2

14

C1

13

C4

12

R1

R3

R2

R4

R5

C5

9

4

10

VREF

VCC

CT

VAI

RT

VSENSE

OVP/EN

VREF

VAOUT

3

8

2

VFF

C6

C7

R7

6

5

R9

C8

R8

D6

R10

D5

R11

R12

R14

C13

C14

R13

IAC

D2

D1

C12

VOUT

+

−

PKLIMIT

CAOUT

CAI

MOUT

IAC

VO

UCC3819

VLINE

VREF

C9

R6

D3

Q1

F1

VO

D4

R19

R20

R21

AC2

AC1

C15

VFF

VCC (FROM BIAS SUPPLY)

Figure 1. Suggested Implementation of UCC3819 in a Tracking Boost PFC Preregulator