Single Cell Li-ion Battery Chargers


The following is a list of products released in the last

Part NumberDescriptionShareDatasheetFree Sample
RT9471H/RT9471HD3A Single Cell Switching Battery Charger Not available
RT9472/RT9472D3A Single Cell Switching Battery Charger Not available
RT9470/RT9470D3A Single Cell Switching Battery Charger Request
RT9759Smart Cap Divider Charger Request
RT9471/RT9471D3A Single Cell Switching Battery Charger Request

Technical Document Image Preview
Basic Linear Battery Charger Circuit

Battery Charger ICs

Battery Charger ICs can be used to provide the correct charge current and voltage for the specific battery cell in your application.

Most battery chargers are designed for Li-Ion batteries since these most popular in hand-held equipment. The battery charger will measure battery charge current and battery voltage, and controls the pass MOSFET in such a way that the charge current follows the required battery charge operation modes: pre-conditioning - constant current - constant voltage - current cut-off.

The maximum charge current can be programmed by an external resistor, and an NTC coupled to the battery will send the battery temperature information to the charger. Charge status pins will signal the charge condition.

Most linear chargers for single cell Li-Ion batteries are fed by 5V supply, and are normally used for charge currents up to 1A, suitable for battery cells up to 1Ah.

To charge larger capacity cells, higher charge currents are needed. In this case switching chargers (Buck topology) must be selected. Some battery chargers contain power path control, which allows the system to be run from either the adapter or the battery. Battery chargers can be selected on single/dual input, fixed/adjustable current, with/without NTC sense, adapter input current limit, and Auto Power Path Management.

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Oct., 2019 Richtek Selection Guide2019/11/06
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Introduction to Richtek USB Type-C Power Delivery Solutions2018/12/18
Power Mangement Components for Lithium-Ion Battery Powered Applications2018/11/15
Power IC Solutions for IoT/Portable/Wearable/Battery-Powered Applications2018/11/15
Designing Applications with Lithium-Ion Batteries2018/10/30
Understanding the characteristics of Li-ion batteries and Richtek power management solutions2018/10/30
Switching Battery Chargers2017/10/18
Evaluation Boards
TitleLast UpdateShareDownload
Linear Single Cell Li-Ion Battery Charger IC for Portable Applications2018/11/08
Easy to Use Power Bank Solution (EZPBSTM) Integrated Chip with Switch Charger, ADC, and Load switch2018/11/08
Dual Output Power Bank Reference Design Using RT9480 EZPBS™ Integrated Chip2018/11/08
5A Single Cell Li-Ion Switching Battery Charger With Direct Charge, Power Path Management and USB OTG Boost Mode2018/11/08
3A Single Cell Li-Ion Battery Slave Switching Charger2018/11/08
Switch-Mode Single Cell Li-Ion Battery Charger with USB-OTG2018/11/08
Additional Documents
Title Last Update ShareDownload
Power Management Components for Lithium-Ion Battery Powered Applications
Dual Output Power Bank Reference Design Using RT9480 EZPBS™ Integrated Chip
双输出移动电源参考设计源档 – 采用 RT9480 EZPBS™芯片
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