Single-cell Li-Ion charger with 500 mA ceiling
The BQ24204DGNRG4 is a linear charger for single-cell Lithium-Ion or Lithium-Polymer battery packs, delivering a constant charge current up to 500 mA. Charge termination voltage is fixed at 4.2 V per cell, and the IC includes over-temperature and short-circuit fault protection. Programmable features are limited to charge current and timer – no I²C or SMBus interface, so the charge profile is set by external resistors and the timer pin.
Obsolete – plan your BOM around independent supply
For a production BOM that cannot requalify, the only sourcing path is through independent distribution or the spot market. We can source and quote to order against your quantity – confirm availability and current pricing at quote time. The base product number BQ24204 suggests that other suffix variants (e.g., BQ24204DGNR) share the same die but differ in packaging or tape/reel orientation – verify mechanical compatibility before substituting.
Thermal and layout – the exposed pad is your heatsink
The 8-HVSSOP package (3.00 mm width, exposed pad) requires a thermal land on the PCB connected to a copper plane; without it, the 500 mA charge current will push junction temperature above the 125°C absolute maximum in still air. Supply voltage range extends to 13.5 V max. Mounting type is Surface Mount, and the part ships in Tape & Reel (TR) – suitable for automated pick-and-place.