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

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Support Documents & Media

EVB_RT9458WSC - User Guide RT9458 - Datasheet EVB_RT9458WSC - Bill of Materials EVB_RT9458WSC - Schematic Pack EVB_RT9458WSC - Gerber File Application Notes -Switching Battery Chargers

Media

EVB_RT9458WSC - Schematic EVB_RT9458WSC - Board