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Texas Instruments BQ24202DGNG4 — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24202DGNG4 Texas Instruments Li-Ion Charger IC – Active

MPNBQ24202DGNG4
End of Life

Texas Instruments BQ24202DGNG4, single-cell Li-Ion/Polymer linear charger IC, 500 mA max charge current, 4.2 V battery voltage, 8-HVSSOP package, active lifecycle.

BQ24202DGNG4 datasheet
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Specifications

BQ24202DGNG4 Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.2V
Voltage13.5V
Current - chargingConstant
Charge current - max500mA
Operating temperature-40°C~125°C(TJ)
PackageTube
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width) Exposed Pad
Number of cells1
Fault protectionOver Temperature, Short Circuit
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent, Timer

Product details

Single-cell Li-ion linear charger – 500 mA ceiling

The BQ24202DGNG4 is a linear charger IC for single-cell Lithium Ion/Polymer batteries, delivering constant charge current up to 500 mA. The 4.2 V battery pack voltage is fixed internally, so this part targets standard Li-ion cells, not LiFePO4.

Programmable charge current and timer

Charge current and safety timer are programmable via external resistors, giving the designer control over charge rate and termination timing. The 13.5 V maximum supply voltage allows operation from a standard 5 V USB or higher-voltage wall adapter.

Active lifecycle – no obsolescence risk

The part ships in a Tube, surface-mount 8-HVSSOP package with exposed pad for thermal management.

Protection and temperature range

Built-in fault protection covers over-temperature and short-circuit conditions, reducing external component count and improving reliability in portable designs.

Frequently asked questions

Can BQ24202DGNG4 charge LiFePO4 batteries?

No. The BQ24202DGNG4 is designed for single-cell Lithium Ion/Polymer batteries with a fixed 4.2 V battery pack voltage. LiFePO4 cells require a different charge voltage (typically 3.6 V per cell) and are not supported.

How to program the charge current on BQ24202DGNG4?

The charge current is set by an external resistor connected to the ISET pin, per the formula in the datasheet. The timer is also programmable via an external capacitor on the TMR pin.

Is there a pin-compatible alternative to BQ24202DGNG4?

Within the BQ24202 family, the base product number BQ24202 covers several package and temperature variants. The BQ24202DGN (without the G4 suffix) is the same die in the same 8-HVSSOP package; the G4 suffix indicates RoHS compliance. Confirm the exact charge current and timer programming before substituting.