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Texas Instruments BQ25155YFPR — Power Management (PMIC / Gate Driver)

BQ25155YFPR Texas Instruments Li-Ion Charger IC – I²C

MPNBQ25155YFPR
Active

Texas Instruments BQ25155YFPR, single-cell Li-Ion/Polymer linear charger IC, I²C interface, programmable charge current to 500 mA, 20-bump DSBGA package, -40°C to 85°C operation.

$3.1200Ref. price · indicative, final on quote
Texas Instruments BQ25155YFPR datasheet (PDF)
Packaging20-XFBGA, DSBGA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ25155YFPR specifications
ParameterValue
MountingSurface Mount
Battery pack voltage4.2V
Supply voltage3.6V
Current - chargingConstant - Programmable
Charge current - max500mA
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case20-XFBGA, DSBGA
Number of cells1
Fault protectionOver Current, Over Temperature, Over Voltage, Reverse Battery, Short Circuit
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

500 mA I²C-programmable linear charger for 1-cell Li-ion

It integrates fault protection covering overcurrent, overtemperature, overvoltage, reverse battery, and short-circuit conditions.

I²C programmability and fault envelope

Charge current is set through the I²C interface — no external resistor divider needed, which saves two passives and one GPIO. The protection set covers the common failure modes in single-cell portable systems: input overvoltage, battery reverse connection, and die overtemperature. The 3.6 V max supply means this part runs off a standard USB VBUS or a regulated 3.3 V rail, not a 5 V direct input — plan the upstream supply accordingly.

No PCN or last-time-buy has been issued.

20-bump DSBGA — layout and assembly considerations

The 20-DSBGA package has a 0.4 mm ball pitch typical for this class. A four-layer board with microvias is recommended for fan-out. The 1-cell architecture targets battery packs with a 4.2 V termination voltage.

Frequently asked questions

Is the BQ25155YFPR obsolete?

No — it carries an Active product status. No end-of-life notice has been issued, so it remains suitable for new designs.

How do I program the charge current via I²C?

The BQ25155YFPR uses a standard I²C interface to set the charge current and monitor fault status. The charge current is constant and programmable; the host writes the desired current value to the appropriate register. Refer to the Texas Instruments datasheet for the register map and I²C timing.

What is the closest alternative to the BQ25155YFPR in the same family?

The base product number BQ25155 shares the same die and function. The YFP suffix indicates the DSBGA package variant. Any BQ25155 variant with the same package code is a direct alternative; confirm the package marking and tape/reel option for your assembly house.