RT9472/D
3A Single Cell Switching Battery Charger
General Description
Features
High Efficiency, 1.5MHz, Synchronous Switch-
The RT9472/D is a highly-integrated 3A switch mode
battery charge management and system power path
management device for single cell Li-Ion and Li-polymer
battery. The low impedance power path optimizes
switch-mode operation efficiency, reduces battery
charging time and extends battery life during
discharging phase. The I2C serial interface with
charging and system settings makes the device a truly
flexible solution.
Mode Buck Charger
92% Charge Efficiency at 2A with 5V Input and
3.8V Battery
Support 3.9V to 13.5V Input Voltage Range
Average Input Current Regulation (AICR)
Minimum Input Voltage Regulation (MIVR)
Minimum Input Voltage Regulation Track
(MIVR Track)
Charge Current Regulation (CCR)
Charge Voltage Regulation (CVR)
Charge Voltage Regulation Track (CVR Track)
Junction Thermal Regulation (JTR)
Supports USB On-The-Go (OTG)
92% Boost Efficiency at 1A with 3.8V Battery
and 5.15V Output
Ordering Information
RT9472/D
Pin 1 Orientation***
(2) : Quadrant 2, Follow EIA-481-D
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 2)
OTG Current Limit Regulation (OCLR)
OTG Voltage Limit Regulation (OVLR)
Protection
Lead Plating System
G : Green (Halogen Free and Pb Free)
Function Support
Default : Pin2 : PSEL, Pin3 : PG
D : Pin2 : D+, Pin3 : D-
Over-Temperature Protection (OTP)
VBUS Over-Voltage Protection (VBUS OVP)
Battery Over-Voltage Protection (VBAT OVP)
System Over-Voltage Protection (VSYS OVP)
System Under-Voltage Protection (VSYS UVP)
System Over-Load Protection (VSYS OLP)
Cycle-by-Cycle Over-Current Protection (OCP)
OTG Low Battery Protection (OTG LBP)
Note :
***Empty means Pin1 orientation is Quadrant 1
Richtek products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Applications
Smart Phone/Tablet PC
Personal Information Appliances
Portable Device and Accessory
Simplified Application Circuit
RT9472/D
VAC
BTST
SW
USB
VBUS
CBTST
L
System
CSYS
CBUS
PMID
SYS
BAT
CBAT
QON
REGN
2
I C BUS
Host
TS
Host control
Battery
Pack
Copyright © 2020 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9472/D-00 July 2020
www.richtek.com
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