34V input, 18V pack — charger for industrial and automotive battery stacks
The LT3652HVEMSE#PBF from Analog Devices is a multi-chemistry battery charger IC designed for 4 to 5 series cells, with a maximum battery pack voltage of 18V. It accepts a supply input up to 34V, which gives headroom for 24V industrial rails or automotive systems with load-dump transients. The charge current is programmable up to 2A, and a timer termination option is built in — no external microcontroller needed for basic charge management. The operating junction temperature range of -40°C to 125°C suits it for outdoor telecom enclosures, engine-bay-adjacent electronics, or factory-floor charger modules where ambient heat is a given.
Charge profile and chemistry flexibility
Multi-chemistry support means this IC can handle Li-Ion, LiFePO4, or lead-acid chemistries with appropriate resistor divider settings on the output voltage feedback. The constant-current, constant-voltage (CC/CV) profile is standard for Li-Ion; the programmable timer provides a safety backup if the termination current threshold is not reached. The 2A maximum charge current suits 4S or 5S packs.
Package and mounting — what the 12-TSSOP exposed pad means for your board
The package with exposed pad (3.00 mm width) is a surface-mount design. The exposed pad must be soldered to a thermal land on the PCB — it is the primary heat path for the 2A charge current.
Lifecycle — active, no LTB watch needed
The LT3652HVEMSE#PBF carries an Active lifecycle status. There is no last-time-buy window, no NRND flag, and no announced end-of-life. For a BOM freeze or a new-design qualification, this part does not introduce obsolescence risk. The ROHS3 compliance is confirmed.