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BQ24400D

BQ24400D Battery Charger IC, Multi-Chemistry, 8-SOIC

MPNBQ24400D
Active

Texas Instruments BQ24400D, multi-chemistry battery charger IC, programmable timer and voltage, 6V max supply, -20°C to 70°C, 8-SOIC, Surface Mount, Tube.

$10.2600Ref. price · indicative, final on quote
Texas Instruments BQ24400D datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ24400D specifications
ParameterValue
MountingSurface Mount
Voltage6V
Operating temperature-20°C~70°C(TA)
PackageTube
Case8-SOIC (0.154\", 3.90mm Width)
Battery chemistryMulti-Chemistry
Programmable featuresTimer, Voltage

Product details

The BQ24400D is a multi-chemistry battery charger controller in an 8-SOIC package. It handles charge termination for NiCd, NiMH, and Li-Ion cells, using programmable timer and voltage thresholds.

The BQ24400D lets you set charge termination by an external timing capacitor and a voltage reference divider. That means you tune the charge end-point to the cell chemistry without swapping the IC. For a NiMH pack you set the timer to a fixed interval; for Li-Ion you use the voltage threshold. The trade-off: no I²C or SMBus interface, so the profile is fixed once the passives are soldered. Good for a dedicated charger board, less flexible for a multi-chemistry universal charger that needs field reconfiguration.

TI has not announced obsolescence for this base part number. The 8-SOIC package and ROHS3 compliance mean it slots into standard lead-free SMT lines without a process waiver.

Frequently asked questions

What is the BQ24400D battery charger IC used for?

The BQ24400D is a multi-chemistry battery charger controller used to terminate charge for NiCd, NiMH, and Li-Ion cells. It is typically employed in portable devices, bench chargers, and light industrial equipment where a fixed charge profile is acceptable.

Does BQ24400D require external components for charging?

Yes, the BQ24400D requires external passives — a timing capacitor to set the charge interval and a voltage divider to set the voltage threshold. It is a controller, not a complete charger module, so you also need an external pass transistor (typically a PNP or P-MOSFET) and current-sense resistor.

What is the closest pin-compatible alternative to BQ24400D?

The BQ24400 is the base product number; the BQ24400D is the specific package variant (8-SOIC). Within the same family, the BQ24401 offers a different timer range but shares the same pinout and package. For a direct drop-in, verify the timer range matches your charge time requirement.