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Texas Instruments BQ24125RHLT — Power Management (PMIC / Gate Driver)

BQ24125RHLT Li-Ion Battery Charger IC – Texas Instruments

MPNBQ24125RHLT
Active

Texas Instruments bqSWITCHER™ series, BQ24125RHLT, Li-Ion/Polymer battery charger IC, 1-3 cells, 2A max charge current, 16V supply max, -40°C to 85°C, 20-VFQFN Exposed Pad package

$8.6600Ref. price · indicative, final on quote
Texas Instruments BQ24125RHLT datasheet (PDF)
Packaging20-VFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesbqSWITCHER™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24125RHLT specifications
ParameterValue
SeriesbqSWITCHER™
MountingSurface Mount
Battery pack voltage8.4V
Supply voltage16V
Current - chargingConstant - Programmable
Charge current - max2A
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case20-VFQFN Exposed Pad
Number of cells1 ~ 3
Fault protectionOver Temperature
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent, Timer

Product details

What this charger does for your battery stack

The BQ24125RHLT is a Li-Ion/Polymer battery charger from the bqSWITCHER™ series, handling 1 to 3 series cells with a programmable constant-current charge up to 2A max. It accepts a supply up to 16V, which covers most USB-C PD adapters and 12V wall warts without an extra pre-regulator. The charge current and a safety timer are programmable, and the IC includes over-temperature fault protection.

2A charge current and thermal reality

At 2A charge current, the power dissipated in the internal MOSFETs and sense resistor heats the die. For a 2-cell (8.4V) pack, the charger regulates the final battery voltage at 8.4V. The constant-current phase delivers up to 2A until the cell voltage reaches the regulation threshold, then the charger switches to constant-voltage until the current tapers.

Frequently asked questions

What is the charge current of the BQ24125RHLT?

The maximum programmable charge current is 2A, set by an external resistor. The charger operates in constant-current mode until the battery reaches regulation voltage.

Does the BQ24125RHLT support 3-cell Li-ion batteries?

Yes, it supports 1 to 3 series Li-Ion or Li-Polymer cells. For a 3-cell stack, the battery pack voltage would be 12.6V, within the 16V supply maximum.

What is the difference between the BQ24125RHLT and the BQ24120?

The BQ24120 is a similar bqSWITCHER™ charger but with a lower maximum charge current and a different package option. The BQ24125RHLT offers the 2A ceiling and the 20-VQFN exposed-pad package; confirm pin compatibility and programming resistor values from the respective datasheets before substituting.