Texas Instruments bqTINY™ III series, BQ24031RHLR, single-cell Li-Ion/Polymer battery charger IC, USB interface, 1.5A max charge current, 16V max supply, 20-VFQFN Exposed Pad package, -40°C to 125°C operating range.
| Parameter | Value |
|---|---|
| Series | bqTINY™ III |
| Mounting | Surface Mount |
| Battery pack voltage | 4.36V |
| Supply voltage | 16V |
| Current - charging | Constant - Programmable |
| Charge current - max | 1.5A |
| Interface | USB |
| Operating temperature | -40°C~125°C(TJ) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | 20-VFQFN Exposed Pad |
| Number of cells | 1 |
| Fault protection | Over Temperature, Reverse Current, Short Circuit |
| Battery chemistry | Lithium Ion/Polymer |
| Programmable features | Current, Timer |
The charge current is constant and programmable via an external resistor; a programmable timer terminates the charge cycle after a set period. Built-in fault protection covers over-temperature, reverse current, and short-circuit conditions — no external monitoring components needed for these safeguards.
The BQ24031RHLR is specified for a battery pack voltage of 4.36V. Charging a standard 4.2V Li-ion cell with this part would overcharge the cell — use a charger IC with a 4.2V regulation point instead.
Yes, the BQ24031RHLR accepts a USB input through its USB interface. The maximum supply rating of 16V also allows use with higher-voltage wall adapters, but the charge current must be programmed to stay within the USB port's current capability.