Quasi-Resonant PWM Controller
ICE2QS01
Representative block diagram
2
Representative block diagram
VZCT2
VZCT1
ringing
suppression
time control
ZC
1
Zero-crossing
counter
VOLP
OLP
up/down
counter
VVCCOVP
VCC
OVP
auto
restart
active burst
control
VCC
UVP
REG
2
V
RReg
vccuvp
output
VOPOVP
OVP
V
REF
latch
off
on/off FF
VcsSW
SWP
gate driver
current limitation /
foldback correction
CS
3
OUT
6
Vcsth
power management
power cell
controller
current measurement
HV
GND
8
v1
4, 5
Vos
VCC
7
Figure 2
Representative Blockdigram
Version 2.1
6
26 October 2007