Li-Ion charge controller for 16.8V packs
The ADP3810AR-16.8 is a constant-current programmable charge controller designed for Lithium Ion/Polymer battery stacks, targeting a pack voltage of 16.8 V. It supports 1 to 4 series cells and integrates over-current and over-voltage fault protection, covering the two failure modes that can vent a Li-Ion cell if the charger loses regulation.
Charge current and voltage rails
Maximum charge current is 6 mA, programmable via an external resistor — this is a low-rate controller suited for trickle-charge or top-off applications, not bulk fast charging. Supply voltage ceiling is 16 V; the controller regulates the battery pack to 16.8 V, so the input rail must stay above the pack voltage plus dropout to maintain regulation.
Marked as Active on the lifecycle record — no last-time-buy or phase-out notice on file, so it remains a viable BOM line for new and existing designs. RoHS non-compliant per the listing — the part contains lead in the solder finish or die-attach. Verify your assembly exemption (RoHS 7(c)-I or similar) before committing to a lead-free reflow profile.