S-8232NAFT-T2-G

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The S-8232NAFT-T2-G is a two-cell (Li-Ion or LiFePO4) linear charger designed for lithium-ion battery applications. It is optimized to achieve maximum charging efficiency and minimal external component count. The device features independent charging of two batteries with the added capability of charging boosted cells by selecting the high voltage boosting mode. Additionally, it includes high voltage sensing, low voltage sensing, over-temperature protection, and other safety features. The S-8232NAFT-T2-G provides fast, accurate, and reliable charging of both battery types, making it an ideal solution for applications requiring the use of both Li-Ion and LiFePO4 battery chemistries.

Application Field

The S-8232NAFT-T2-G is an ideal solution for applications requiring the use of both Li-Ion and LiFePO4 battery chemistries, including:

• Portable medical devices
• Smart phone, MP3 music devices and mobile digital video cameras
• Industrial power tools, laptops and other portable electronics
• Electric vehicles and electric bicycles

Working Principle

The S-8232NAFT-T2-G implements an efficient two-cell batter management system (BMS) with a single-stage linear charger. A single inductor is used to charge two cells of different varieties simultaneously. Two independent charging channels allow for adjustment of the charging current and voltage for each battery. The circuit includes protection for over-temperature and over-voltage shutdown, and monitors the battery temperature for safer charging. The S-8232NAFT-T2-G also includes external inputs for the cell-voltage sensing and power switch for the battery packs.

The device measures the voltage of each battery cell and applies a charging voltage, ensuring both cells are charged equally. The charger has a switching output, allowing it to offer a variable current mode or constant current mode, depending on the application needs. The adjustable current limits and safe, low voltage thresholds allow the S-8232NAFT-T2-G to attain a high level of charging efficiency. The design also features a programmable pre-charge/fast-charge feature that can be used to adjust the charge parameters based on the battery type and capacity.

The S-8232NAFT-T2-G also includes a charge status display, indicating when the charge cycle is complete. This makes it easy to monitor the charging progress and ensure the battery pack is correctly charged before use. The simple wiring and flexible parameter settings make the S-8232NAFT-T2-G a reliable and cost-efficient solution for two-cell battery management.

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