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Texas Instruments BQ24203DGNG4 — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ24203DGNG4 Li-Ion Charger IC, 500mA Max, 4.1V, Active

MPNBQ24203DGNG4
End of Life

Texas Instruments BQ24203DGNG4, single-cell Li-Ion/Polymer linear charger IC, 500mA max charge current, 4.1V battery pack voltage, programmable current and timer, 8-HVSSOP package, -40°C to 125°C operation.

BQ24203DGNG4 datasheet
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Specifications

BQ24203DGNG4 Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.1V
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 charger with 500 mA ceiling

The Texas Instruments BQ24203DGNG4 is a linear charger IC for single-cell Lithium Ion or Polymer battery packs. It delivers a constant charge current up to 500 mA and terminates at a 4.1V battery regulation voltage — the chemistry sweet spot for many 4.2V-rated cells that charge to 4.1V for extended cycle life.

Programmable current and timer — set the charge profile

Two programmable features — charge current and charge timer — let you tailor the charge algorithm without changing the IC. The current is set with an external resistor; the timer provides a safety timeout that terminates charging if the battery does not reach the regulation voltage within the window. This is a linear charger, so the input supply must stay above the battery voltage by the dropout margin; the maximum supply voltage is 13.5 V.

Fault protection and temperature range

Built-in fault protection covers over-temperature and short-circuit conditions on the output.

Package and mounting — 8-HVSSOP with exposed pad

The pad also provides a solid ground reference.

Frequently asked questions

Is BQ24203DGNG4 suitable for charging 4.2V lithium-ion batteries?

Yes, with a note. The BQ24203DGNG4 regulates the battery pack voltage to 4.1V, which is within the safe charging range for most 4.2V-rated Li-Ion cells. Charging to 4.1V instead of 4.2V reduces capacity slightly (roughly 10-15%) but extends cycle life. If you need the full 4.2V termination, look at a charger with a 4.2V regulation point.

What is the charge current range and programmability for BQ24203DGNG4?

The maximum charge current is 500 mA, and the charge current is programmable via an external resistor. The charge timer is also programmable. The IC operates in constant-current mode during the bulk charge phase.

What is the difference between BQ24203DGNG4 and BQ24203?

The BQ24203DGNG4 is the specific ordering code for the 8-HVSSOP package variant with tape-and-reel packaging. The base part number BQ24203 refers to the die and function; the DGNG4 suffix identifies the package and shipping format. Functionally they are identical.