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Texas Instruments BQ24159YFFR — Power Management (PMIC / Gate Driver)

TI BQ24159YFFR Li-Ion/Polymer Battery Charger, 1.55 A Max

MPNBQ24159YFFR
Active

Texas Instruments BQ24159YFFR single-cell Li-Ion/Polymer battery charger, I²C interface, 1.55 A max charge current, over-temp/over-voltage protection, 20-DSBGA package, -30°C to 85°C operation.

$3.1920Ref. price · indicative, final on quote
Texas Instruments BQ24159YFFR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24159YFFR specifications
ParameterValue
MountingSurface Mount
Battery pack voltage4.44V (Max)
Supply voltage9V
Current - chargingConstant - Programmable
Charge current - max1.55A
InterfaceI²C
Operating temperature-30°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case20-UFBGA, DSBGA
Number of cells1
Fault protectionOver Temperature, Over Voltage
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent, Timer

Product details

The BQ24159YFFR is a single-cell Li-Ion/Polymer battery charger from Texas Instruments, built for constant-current programmable charging with a maximum charge current of 1.55 A. That 1.55 A ceiling sets the charge time floor for a given cell capacity — a 1000 mAh cell charges at roughly C/1.5, keeping the thermal rise manageable in the 20-DSBGA package. The I²C interface gives the host controller command over the charge current and timer, so you can adjust the profile on the fly for different cell chemistries or temperature conditions without swapping passives.

Fault protection — over-temp and over-voltage

On-chip fault protection covers over-temperature and over-voltage conditions. That means the charger can shut itself down if the die exceeds safe limits or if the input supply spikes above the 9 V max supply rating.

Package and footprint — 20-DSBGA

Housed in a 20-UFBGA, DSBGA package with a supplier device package of 20-DSBGA.

Frequently asked questions

Can BQ24159YFFR charge a 4.2 V single-cell Li-ion battery?

Yes. The BQ24159YFFR is designed for single-cell Li-Ion/Polymer batteries with a maximum battery pack voltage of 4.44 V, which covers the standard 4.2 V full-charge termination voltage. The I²C interface lets you set the charge current and timer to match the cell's recommended profile.

What is the maximum charge current for BQ24159YFFR?

The maximum charge current is 1.55 A, programmable via I²C. This is the constant-current ceiling; actual charge current can be set lower through the I²C interface to match the cell capacity and thermal budget.

Does BQ24159YFFR work with single-cell LiPo batteries?

Yes. The battery chemistry is listed as Lithium Ion/Polymer, so it supports both Li-ion and LiPo single-cell packs. The 4.44 V max battery voltage covers the standard 4.2 V LiPo termination voltage.