Single-cell Li-Ion linear charger with programmable current and timer
The BQ24202DGN is a constant-current linear charger for single-cell Li-Ion or Li-Polymer batteries, delivering up to 500 mA charge current from a supply rail as high as 13.5 V. Charge current and safety timer are programmable via external resistors, giving the BOM engineer control over charge profile without a digital interface. Fault protection includes over-temperature shutdown and short-circuit detection, both essential for battery-powered portable equipment where a runaway charge event risks cell damage.
Thermal and package considerations for layout
The device is housed in an 8-TSSOP/8-MSOP (0.118-inch, 3.00 mm width) package with an exposed pad — the 8-HVSSOP supplier device package. Operating junction temperature spans -40°C to 125°C, so the part suits outdoor or under-hood battery charging applications that see wide thermal swings. Surface-mount assembly with the exposed pad requires a solder stencil aperture covering at least 50% of the pad area for reliable void-free reflow.
Active lifecycle and sourcing posture
That means the part is available for new designs and ongoing BOM replenishment without forced redesign. The base product number BQ24202 covers multiple package and tape options; the DGN suffix identifies this specific 8-HVSSOP variant.