RT7800B
Functional Block Diagram
Programmed as output pin :
OD : Open-drain
PP : Push-pull
MCU System
OD or PP
SCK_CHG
SDA_CHG
IRQ
Master I2C
(400 kbit/s)
OD or PP
OD or PP
OD
ARM
Under-Voltage
Lockout (UVLO)
UVLO
CortexTM-M0
SCK_EC
Slave I2C
(400 kbit/s)
Power-Saving
Mode Control
OD
VX
SDA_EC
ALERT
OD or PP
PP
VBUS
VSYS5
VRACT
GPIO1/AIN1
GPIO2/AIN2
STAT
Oscillator
(21.6 MHz)
OD or PP
OD or PP
OD
Switch
Voltage Selector
HV LDO(5V)
ENB
GPIOs
MTP Memory
(16 kByte)
OD or PP
OD or PP
TS
CEB
ROM
(16 kByte)
VDD
V2
AIN1
AIN2
VCS
CC1
CC2
10-bit ADC
and
Multiplexer
SRAM
(2 kByte)
LV LDO (1.8V)
IC Bias Supply
TS
VBUS
VX
Watch Dog
Timer
Resistor
Dividers
VBP
Output Bleeder (1k)
CSP
VSYS5
VCONN
Timers
Digital-controlled
Sinking Current
(9-bit, 0 to 350µA)
DAC_CV
Protections
CC1/2 Functions
PD Communication
Physical Layer
Over-Voltage
Protections (OVP)
(8-bit, 24V max.)
VX
Charge-Pump
Gate Drivers (VBUS)
GC2A
GC2B
VBUS
Selectable
Current Source (Ip)
(80µA, 180µA, 330µA)
CC1
CC2
Charge-Pump
Gate Driver (VX)
Under-Voltage
Protection (UVP)
(8-bit, 20V max.)
GC1
GP
Pull-down Resistor
(Rd, 5.1k)
Charge-Pump
Gate Driver (CSP)
Over-Current
Protection (OCP)
(8-bit, 60mV max.)
Dead Battery
Function
VCS
CSP
CSN
GND
VCS
VCONN
Offset-cancelled
Current-sensing Amplifier
Built-in
VCONN Switchs
VCONN1
VCONN2
VCONN1/2
Current-Limit
Power Controls
Copyright 2017 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7800B-00 May 2017
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
