Texas Instruments BQ25172DSGR, 0.8-A one- to six-cell NiMH linear charger, 8-WFDFN exposed pad, USB interface, programmable current/timer/voltage, active production.
| Parameter | Value |
|---|---|
| Mounting | Surface Mount |
| Battery pack voltage | 10.5V (Max) |
| Voltage | 18V |
| Current - charging | Constant - Programmable |
| Charge current - max | 800mA |
| Interface | USB |
| Operating temperature | -40°C ~ 125°C (TJ) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Case | 8-WFDFN Exposed Pad |
| Number of cells | 1 ~ 6 |
| Fault protection | Over Current, Over Temperature, Over Voltage, Short Circuit |
| Battery chemistry | Nickel Metal Hydride |
| Programmable features | Current, Timer, Voltage |
The BQ25172DSGR is a linear charger IC from Texas Instruments designed for Nickel Metal Hydride (NiMH) battery packs. It handles 1 to 6 series cells with a maximum charge current of 800 mA, programmable via an external resistor. Input voltage goes up to 18 V, and the part integrates over-current, over-temperature, over-voltage, and short-circuit fault protection — so you don't need a separate supervisor IC for a basic NiMH cradle charger.
Yes. The part includes over-voltage protection as part of its fault protection set, which prevents overcharging the NiMH cells. It also integrates over-current, over-temperature, and short-circuit protection.
The BQ25170 is a Li-ion charger, while the BQ25172DSGR is a NiMH charger. They are not pin-compatible or chemistry-compatible. If you are switching from NiMH to Li-ion, the BQ25170 is the correct part; if you need a NiMH charger, the BQ25172DSGR is the direct choice.