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Texas Instruments BQ24161BYFFR — Power Management (PMIC / Gate Driver)

BQ24161BYFFR battery charger IC, 2.5 A max, I²C, 49-DSBGA

MPNBQ24161BYFFR
Active

Texas Instruments BQ24161BYFFR, single-cell Li-Ion/Polymer battery charger, 2.5 A max charge current, I²C interface, 49-DSBGA 2.8x2.8 mm package, -40°C to 85°C operating temperature.

$2.8350Ref. price · indicative, final on quote
Texas Instruments BQ24161BYFFR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24161BYFFR specifications
ParameterValue
MountingSurface Mount
Battery pack voltage3.7V
Supply voltage10V
Current - chargingConstant - Programmable
Charge current - max2.5A
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case49-UFBGA, DSBGA
Number of cells1
Fault protectionOver Temperature, Over Voltage
Battery chemistryLithium Ion/Polymer

Product details

2.5 A programmable charge current, I²C control

The I²C interface lets the host set the charge current and monitor status without extra GPIOs. Over-temperature and over-voltage fault protection are built in, so the charger handles adapter glitches without the MCU having to intervene.

Input voltage and thermal limits for field fit

Supply max is 10 V, which covers standard 5 V USB and 9 V wall adapters. The 49-DSBGA package (2.8 x 2.8 mm) is tiny, but that BGA footprint means the board needs a stencil and a reflow profile; this is not a hand-solder part for a field swap.

Frequently asked questions

What is the charge current of BQ24161BYFFR?

The maximum charge current is 2.5 A, programmable via I²C. The charger operates as a constant-current source during the bulk charge phase.

What package is BQ24161BYFFR in?

It comes in a 49-DSBGA (2.8 x 2.8 mm) package, surface-mount only. The tiny BGA footprint requires a reflow oven — not a hand-solder field repair.

Is BQ24161BYFFR a switching charger?

Yes, it is a switching (constant-current programmable) charger for single-cell Li-Ion/Polymer batteries. The I²C interface provides digital control of charge parameters.