The BQ24195LRGET is a Texas Instruments single-cell Li-Ion/Polymer charger IC that handles up to 2.5 A charge current via a programmable constant-current profile. That 2.5 A ceiling is the practical limit for a 1S cell in a 24-VQFN (4x4) package — the exposed pad pulls heat into the board copper, so the actual charge rate depends on your PCB thermal design. The I²C interface lets you set the charge current, termination threshold, and safety timers on the fly — useful for systems that charge different battery packs or need to adjust the profile during a temperature sweep.
Supply range and fault protection
Maximum supply voltage is 17 V, which covers most USB-C and 5 V wall adapters with headroom for transients. The integrated fault protection — overcurrent, overtemperature, and overvoltage — means you don't need an external supervisor for basic safety; the chip shuts itself down before the cell sees a bad rail. The battery pack voltage is fixed at 4.2 V, so this part is strictly for 1S (single-cell) Li-Ion or Li-Poly packs. It will not charge a 2-cell stack — the 4.2 V regulation point is hardwired, not programmable via I²C.
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