U3848/A/B/C
BLOCK DIAGRAM
VCC
7
SS 1
OVP
OLP
OTP
VREF
8
UVLO
Reference voltage
Soft Start
Power-Saving
Unit
LINEAR INTEGRATED CIRCUIT
RT
4
Oscillator
Latch
SQ
RQ
Driver
6 OUT
FB 2
PWM
COMP
5
GND
Explain:OLP(Over Load Protection)
OVP(Over Voltage Protection)
OTP(Over Temperature Protection)
UVLO(Under Voltage Latch-Out
LEB(Led Edge Blanking)
SS(Soft Start)
Current
Limiting
LEB 3 CS
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 13
QW-R103-033,B