500 mA charge current — USB-standard ceiling
The BQ24023DRCRG4 is a single-cell Li-Ion/Polymer linear charger from TI's bqTINY™-II family, built for USB-powered portable designs. Its 500 mA maximum charge current matches the USB 2.0 standard port limit, so a simple USB VBUS connection delivers the full rated current without negotiation. Charge current is constant and programmable via an external resistor, with a programmable timer for termination. The 4.2 V battery pack voltage is fixed — no cell-balancing or multi-chemistry options; this part is strictly for single-cell Li-Ion or Li-Polymer packs.
Temperature range and fault protection
Over-temperature fault protection is built in, shutting down the pass device if the die exceeds the safe limit. Supply voltage max is 6.5 V, so a 5 V USB rail or a regulated 5 V wall adapter is fine.
Obsolete — sourcing reality
TI lists the BQ24023DRCRG4 as obsolete. No official successor part number appears on the lifecycle record.
