RT2702
Functional Block Diagram
EN
UVLO
Enable Logic
To Driver Logic
To Power On Reset
To Soft-Start Control
CSN
Soft-off
Discharge
VIN
THWN
MODE
Mode Select
LDO
VDRV
Power-on Reset
POK
V
REF
0.6V
RGND
112.5% V
REF
+
-
OVP
Control & Protection
Logic
Over-
Temperature
Protection
150
C
87.5% V
REF
+
-
+
-
UVP
DISB
SS
FB
GND
TON
Soft-Start
Control
VSEN
TON
Gen.
Driver
Logic
PWM
ZCD
Current Limit
Setting
1.2V
+
-
Current Limit
+
-
PHASE
CSP
CSN
V
ILIM
/ R
ILIM
ILIM
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS2702-02 May 2019
www.richtek.com
3
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