UCC28951
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ZHCSIQ7A –AUGUST 2018 –REVISED DECEMBER 2021
8.2 Typical Application
A typical application for the UCC28951 is a controller for a phase-shifted full-bridge converter that converts a 390-VDC input to a regulated 12-V output
using synchronous rectifiers to achieve high efficiency.
+
CT
VBIAS
VIN
CIN
CREF
R1
R2
RLF2
1
2
3
4
5
6
7
8
9
VREF
EA+
GND 24
VDD 23
VDD
œ
CVDD
R3
EA-
OUTA 22
OUTB 21
OUTC 20
OUTD 19
OUTE 18
OUTF 17
SYNC 16
CS 15
A
VDD
VDD
C1
R5
VSENSE
COMP
SS/EN
DELAB
DELCD
DELEF
TMIN
B
QA
QC
C2
A
C
R4
R6
C3
T1
NP
CSS
RAB
C
D
NS
NS
ENABLE
VDD
VDD
RCD
REF
E
QB
LOUT
QD
F
B
D
RTMIN
SYNC
VOUT
RAHI
RT
VREF
10 RT
+
RSUM
UCC27324
UCC27324
QF
11 RSUM
12 DCM
ADEL 14
ADELEF 13
RAEFHI
QE
RDCMHI
E
F
COUT
VREF
RA
œ
RAEF
DA
RLF1
CLF
RDCM
RCS
R7
VSENSE
图8-3. Typical Application
Copyright © 2023 Texas Instruments Incorporated
English Data Sheet: SLUSDB2
42
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