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Texas Instruments BQ24161BRGET — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24161BRGET Li-Ion Charger IC, 2.5A, I2C, 24-VQFN

MPNBQ24161BRGET
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Texas Instruments BQ24161BRGET single-cell Li-Ion/Polymer battery charger IC, 2.5A max charge current, I2C programmable, 24-VQFN (4x4) package, -40 to 85°C operating range.

$6.6700Ref. price · indicative, final on quote
BQ24161BRGET datasheet
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MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
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Specifications

BQ24161BRGET Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage3.7V
Voltage10V
Current - chargingConstant - Programmable
Charge current - max2.5A
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case24-VFQFN Exposed Pad
Number of cells1
Fault protectionOver Temperature, Over Voltage
Battery chemistryLithium Ion/Polymer

Product details

The BQ24161BRGET from Texas Instruments is a single-cell Li-Ion/Polymer battery charger IC that delivers a programmable constant-current charge up to 2.5 A max. The charge current is set via the I2C interface, so the host MCU can adjust the rate dynamically — useful for thermal management or fast-charge profiles.

I2C control and fault protection

All charge parameters — current, voltage, termination — are written over the I2C bus, eliminating the need for external programming resistors. The part includes over-temperature and over-voltage fault protection, which is essential for safe Li-ion charging in systems where the host may lose control.

Supply rail and temperature range

Maximum supply voltage is 10 V, so a 5 V USB bus or a 9 V wall adapter both fit without a pre-regulator.

Package and footprint

Housed in a 24-VFQFN with exposed pad (4x4 mm), the BQ24161BRGET requires a thermal land pattern on the PCB to sink heat from the 2.5 A charge pass element. The supplier device package is 24-VQFN (4x4).

Frequently asked questions

How do I set the charge current on BQ24161BRGET?

Charge current is set via the I2C interface. The host writes a register value to select the constant-current level up to 2.5 A max. No external resistor is needed.

Is BQ24161BRGET compatible with 2S battery packs?

No. The BQ24161BRGET is a single-cell charger (1 cell). It is designed for 3.7 V Li-Ion/Polymer packs only.