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Texas Instruments BQ24050DSQT — Power Management (PMIC / Gate Driver)

BQ24050DSQT Li-Ion Charger IC, 800 mA, 28 V Input, 10-WSON

MPNBQ24050DSQT
Active

Texas Instruments BQ24050DSQT, single-cell Li-Ion/Polymer linear charger IC, 800 mA max charge current, 4.2 V battery pack voltage, USB interface, 28 V max supply, 10-WFDFN exposed pad package, 10-WSON (2x2).

$2.0300Ref. price · indicative, final on quote
Texas Instruments BQ24050DSQT datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24050DSQT specifications
ParameterValue
MountingSurface Mount
Battery pack voltage4.2V
Supply voltage28V
Current - chargingConstant - Programmable
Charge current - max800mA
InterfaceUSB
Operating temperature0°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Case10-WFDFN Exposed Pad
Number of cells1
Fault protectionOver Temperature, Over Voltage, Short Circuit
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

800 mA charge current, 4.2 V termination — single-cell Li-ion charger in a 2x2 mm WSON

The Texas Instruments BQ24050DSQT is a linear charger IC for single-cell Lithium Ion or Polymer batteries. The wide input range, accepting up to 28 V, lets it connect directly to a USB port or an unregulated wall adapter without a front-end regulator.

Thermal and protection features for a small-footprint charger

At 800 mA the power dissipation in a linear regulator is significant — the thermal pad layout directly sets the practical charge current limit without triggering the over-temperature protection. Built-in fault protection covers over-temperature, over-voltage, and short-circuit conditions. The programmable current feature lets the designer set the charge rate to match the battery capacity.

Frequently asked questions

What is the maximum charge current of BQ24050DSQT?

The maximum charge current is 800 mA, programmable via an external resistor. The actual current in the application is limited by the thermal dissipation of the 10-WSON package and the PCB layout.

What battery pack voltage does BQ24050DSQT charge to?

The charger terminates at 4.2 V, the standard full-charge voltage for single-cell Lithium Ion and Polymer batteries.

Can BQ24050DSQT be used with a USB charger?

Yes — the USB interface and 28 V maximum supply voltage allow direct connection to a USB port or a USB wall adapter. The wide input range handles the 5 V USB bus and tolerates voltage transients without additional protection.