What the BQ24600RVAR does in the power stage
The BQ24600RVAR is a switch-mode Li-Ion/Polymer charge controller that handles 1 to 6 series cells with a programmable constant-current charge up to 10 A. The 28 V maximum supply input covers most 2S to 6S battery stacks from a regulated adapter or a pre-regulated bus. Fault protection is built in: over-current, over-temperature, over-voltage, and short-circuit detection are all on-chip, which simplifies the supervisory circuit around the charger and reduces the component count for safety compliance.
Charge current and cell-count flexibility
The 10 A maximum charge current sets the power-stage design: a 10 A charger at 25.2 V (6S) delivers 252 W, so the external MOSFETs, inductor, and PCB copper must be sized for that continuous power. The current is programmable via a single resistor, which lets the same BOM support multiple battery capacities with a passive change. With 1 to 6 cell support, a single BQ24600RVAR can charge a 3.7 V single-cell pack or a 25.2 V six-cell stack. The battery pack voltage limit is 14 V max, which means for 5S and 6S configurations the charge termination voltage must be set below 14 V — a 6S Li-Ion at 4.2 V/cell terminates at 25.2 V, so the BQ24600RVAR is not a fit for 6S at the standard 4.2 V/cell. It handles 1S through 4S at the standard 4.2 V/cell, or 5S/6S at a reduced per-cell voltage.
Package, mounting, and production status
Confirm the BOM position count and the mating half before committing.