DS8817A Datasheet, PDF (3/21 Pages) Richtek Technology Corporation – Dual-Phase PWM Controller with PWM-VID Reference

RT8817A
Functional Block Diagram
VID
REFADJ
PSI
REFIN
VSNS
EN
TON
OCSET/SS
VREF
Reference
Output Gen.
RGND
Mode Select
OV
150% REFIN
-
or 2V
+
UV
40% REFIN
+
-
Power On Reset
& Central Logic
Control & Protection Logic
Boot-Phase
Detection 1
Soft-Start
& Slew Rate
Control
PWM
CMP
+
-
Enable To Driver Logic
Logic To Power On Reset
TON
Gen 1
TON
Gen 2
Boot-Phase
Detection 2
PWM1
Driver
PWM2 ^Logic
To Power On Reset
V_IN
Detection
Current
Balance
I_CS
10µ
I_CS 40µ
To Protection Logic
To SSOK
X(-1/12)
Current
Limit
S/H
-
GM
+ _VB
-
S/H GM
+ _VB
-
+
-
+
PVCC
PGOOD
BOOT1
UGATE1
PHASE1
LGATE1
BOOT2
UGATE2
PHASE2
LGATE2
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8817A-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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