Synchronous buck battery charger controller offers 20-A charge current

The LTC4015 high voltage multichemistry synchronous step-down battery charger controller features onboard telemetry functions. The device transfers power from a variety of input sources, such as wall adapters and solar panels, to a Li-ion/polymer, LiFePO₄ or lead-acid battery stack and system load up to 35 V. It provides advanced system monitoring and management functionality, including battery coulomb counting and health monitoring. A host microcontroller is required to access the most advanced features of the LTC4015 but an I² C port is optional. The main charging features of the product can be adjusted using pin-strap configurations and programming resistors.

The battery charger offers precision ±5% charge current regulation up to 20 A, ±0.5% charge voltage regulation and operation over a 4.5 to 35-V input voltage range. Applications include portable medical instruments, military equipment, battery backup applications, industrial handhelds, industrial lighting, ruggedized notebooks/tablet computers, and remote powered communication and telemetry systems.