RT3605BE
Functional Block Diagram
VSEN_MAIN
VSEN_AUXI
VSEN_SA
TSEN_MAIN
TSEN_AUXI
VR_READY
VR_HOT
ALERT
SET4
SET5
VRON
PSYS
VCLK
SET1
SET2
SET3
VDIO
IMON
AVG_MAIN
IMON
AVG_AUXI
IMON
AVG_SA
MUX
ADC
UVLO
VCC
GND
VID Controlx
SVID Interface
Configuration Registers
Control Logic
PIN Function
Setting Code
Loop Control/
Protection Logic
DRVEN
Loop logic
control
DAC
VID Control
MAIN
RGND_MAIN
VID_MAIN
FB_MAIN
COMP_MAIN
ISEN1P_MAIN
ISEN1N_MAIN
+
Gm
-
ERROR
AMP
+
-
VIN
Offset
Cancellation
PWM
CMP
Loop logic control
TON
GEN/
Driver
Interface
PWM1_MAIN
PWM2_MAIN
PWM3_MAIN
+
+
-
ZCDx
VCBx
I
IMON1
ICB1
IZD1
IOC1
TONSET[2:0]
+
-
Ai[1:0]
ISEN2P_MAIN
ISEN2N_MAIN
+
Gm
-
Ring-back
Control
RAMP
I
IMON2
ICB2
IZD2
IOC2
VSEN
AQR_TH[2:0]
0.6V/3.2V
ANTIOVS_TH[1:0]
AQR/
ANTIOVS
IZDx
To TONGEN
ZCD_TH[0]
Zero
Current
Detection
ISEN3P_MAIN
ISEN3N_MAIN
+
-
ZCDx
+
Gm
-
I
IMON3
ICB3
IZD3
IOC3
IMON_MAIN
VREF06
DAC
VID Control
AUXI
RGND_AUXI
IMON
Filter
IMON
AVG_MAIN
VSEN
IOCx
IMON
OVP/
UVP/
OCP
To Protection Logic
ICBx
Current
Balance
VCBx
VIN
VID_AUXI
ERROR
AMP
+
-
FB_AUXI
COMP_AUXI
ISEN1P_AUXI
ISEN1N_AUXI
+
Gm
-
Offset
Cancellation
+
PWM
CMP
Loop logic control
TON
GEN/
Driver
Interface
PWM1_AUXI
PWM2_AUXI
+
-
ZCDx
VCBx
I
IMON1
ICB1
IZD1
IOC1
VREF06
TONSET[2:0]
+
-
Ai[1:0]
ISEN2P_AUXI
ISEN2N_AUXI
+
Gm
-
Ring-back
Control
VSEN
AQR_TH[2:0]
RAMP
IZDx
To TONGEN
ZCD_TH[0]
Zero
Current
Detection
I
IMON2
ICB2
IZD2
IOC2
AQR/
ANTIOVS
ZCDx
IMON_AUXI
IMON
Filter
IMON
AVG_AUXI
ANTIOVS_TH[1:0]
VSEN
IOCx
IMON
OVP/
UVP/
OCP
To Protection Logic
ICBx
VIN
Current
Balance
VCBx
DAC
VID Control
SA
RGND_SA
VID_SA
FB_SA
COMP_SA
ISENP_SA
ISENN_SA
+
Gm
-
ERROR
AMP
+
-
Offset
Cancellation
+
PWM
CMP
Loop logic control
TON
GEN/
Driver
Interface
PWM_SA
+
-
ZCDx
TONSET[1:0]
I
IMON1
IZD1
IOC1
Ring-back
Control
RAMP
OVP/
UVP/
OCP
Ai[1:0]
IMON_SA
IMON
Filter
IMON
AVG_SA
VSEN
IOCx
IMON
IZDx
To Protection Logic
ZCD_TH[0]
Zero
Current
Detection
ZCDx
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS3605BE-00
December 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
