UCC2819 Datasheet, PDF (7/10 Pages) Texas Instruments – PROGRAMMABLE OUTPUT POWER FACTOR PREREGULATOR

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UCC2819, UCC3819
PROGRAMMABLE OUTPUT
POWER FACTOR PREREGULATOR
SLUS482B - APRIL 2001 − REVISED DECEMBER 2004
APPLICATION INFORMATION
R21 R13
IAC
AC2 ^F1
VLINE
AC1
C14
D3
C13
R14
R12
R9
R10
D5
R11
VREF
R8
C9
C8
D6
C7
R7
C15
C6
R6
D1
VO
+
D2
Q1
VOUT
C12
UCC3819
1 GND
DRVOUT 16
2 PKLIMIT
3 CAOUT
4 CAI
5 MOUT
VCC 15
CT 14
6 IAC
VAI 13
RT 12
−
R17
D4 _{VCC (FROM BIAS SUPPLY)}
C3
C2
C1
C4
VFF _R1
7 VAOUT
8 VFF
VSENSE 11
VO
R3
R2 R19
OVP/EN 10
VREF 9
C5
VREF
R20 ^R4
R5
UDG−01008
Figure 1. Suggested Implementation of UCC3819 in a Tracking Boost PFC Preregulator
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