Multi-chemistry charger with programmable current and timer
The LT3652EMSE#PBF is a multi-chemistry battery charger IC from Analog Devices, handling Li-Ion, Li-Polymer, NiMH, and NiCd chemistries through a constant-current/constant-voltage algorithm. The 2 A max charge current and 14.4 V battery pack voltage ceiling make it a fit for charging 4-series Li-Ion packs or sealed lead-acid batteries at moderate current. Supply voltage tolerance up to 32 V means the part can regulate from unregulated wall adapters or automotive rails without an external pre-regulator — the input range absorbs transients common in 12 V and 24 V systems.
Package and thermal management
Housed in a 12-TSSOP package with an exposed pad (0.118" width, 3.00 mm), the LT3652EMSE#PBF relies on the thermal pad soldered to a PCB copper plane to dissipate heat during high-current charging. The exposed pad is the primary thermal path — a layout without a solid ground-plane connection under the pad will limit the charge current before the 2 A ceiling is reached. The supplier device package is 12-MSOP-EP, functionally identical to the 12-TSSOP-EP footprint. Both refer to the same 3 mm × 3 mm body with an exposed pad; the MSOP and TSSOP nomenclatures are interchangeable for this part's land pattern.
Temperature grade and charging control
The wide junction range means the charger can run at full 2 A current into a hot battery without hitting thermal shutdown, provided the PCB copper area is adequate. Programmable features include charge current set by an external resistor and a safety timer that terminates charging if the battery does not reach full voltage within the programmed window. The timer prevents overcharging a failed cell that never reaches termination voltage.
Lifecycle and compliance
Sourced to order against BOM quantities.