EVB_RT9458WSC: Lipo/Li-Ion Charger w/ USB OTG

Summary

The RT9458 is a switch-mode single cell Li-Ion/Li-Polymer battery charger for portable applications. It integrates a synchronous PWM controller, power MOSFETs, input current sensing, high accuracy voltage regulation and charge termination circuits. The RT9458 also features USB On-The-Go (OTG).

Minimum Input Voltage Regulation : 4.1V to 4.7V Per 0.1V Step
Charge Voltage Regulation Accuracy : ±1% (0 to 85°C)
Charge Current Regulation Accuracy : ±5%
Synchronous 1.5MHz Fixed Frequency PWM Controller with Up to 95% Duty Cycle
Reverse Leakage Protection to Prevent Battery Drainage
IRQ Output for Communication with I2C

Specifications

Manufacturer	Richtek USA Inc.
Category	Power Management
Sub-Category	Battery Chargers
Eval Board Part Number	EVB_RT9458WSC-ND
Eval Board Supplier	Richtek USA Inc.
Eval Board	Normally In Stock
Cell Type	Lithium Ion, Li-Ion Lithium Polymer, Li-Pol
Configuration	1 Cell
Voltage In	4.3 ~ 6 V
Voltage Out	3.5 ~ 4.44 V
Current Out	Up to 1.55 A
Features	Auto Re-Charge Current Limit (Adj. or Fixed) I²C Interface Over Voltage Protection PWM Interface Synchronizable Thermal Protection
Quiescent Current [Typical]	5 mA
Sleep Mode Current [Typical]	- Not Given
Component Count + Extras	12 + 19
Application / Target Market	Battery Chargers Portable Devices USB Powered Devices
Design Author	Richtek USA Inc.
Main I.C. Base Part	RT9458
Quiescent Current [Maximum]	10 mA
Sleep Mode Current [Maximum]	150 µA
Date Created By Author	2018-04
Date Added To Library	2025-06