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Single Cell Li-Ion Battery Chargers

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The following is a list of products released in the last

Part NumberDescriptionShareDatasheetFree Sample
RT9470/RT9470D3A Single Cell Switching Battery Charger Not available
RT9759Smart Cap Divider Charger Not available
RT9471/RT9471D3A Single Cell Switching Battery Charger Not available

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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Evaluation Boards
TitleLast UpdateShareDownload
Linear Single Cell Li-Ion Battery Charger IC for Portable Applications2018/11/08
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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
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Dual Output Power Bank Reference Design Using RT9480 EZPBS™ Integrated Chip
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Videos
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DIY - How to make a power bank by yourself2014/07/17 520
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