The LTC4013 high-voltage multi-chemistry synchronous step-down
battery charger controller offers an input voltage range up to 60 V. The battery
charger uses temperature-compensated three- and four-stage charge algorithms to
charge 12-V and 24-V lead-acid batteries. Alternatively, it can charge a
multi-cell Lithium-based battery stack with float voltages near the input
supply. Mode pins define the float voltage and charge algorithm. Charge current
is precision regulated to ±5% and programmable with a single resistor up to 20 A.


What makes this significant is its versatility for charging options and
battery chemistries. It supports float, absorption, and equalization
lead-acid and constant-current/constant-voltage Li-ion charging algorithms. The
battery charger controller supports vented and sealed lead-acid batteries, as
well as Li-ion, Li-polymer, LiFePO4, NiMH, and NiCd. That means you only need
one controller for your battery designs. A bonus feature is maximum power point tracking (MPPT) input voltage regulation for applications like solar panels. It
features user-adjustable MPPT circuitry that
enables simple power optimization in the case of power-limited sources such as
solar panels. The MPPT open-circuit method corrects for panel temperature
changes without adding a solar panel temperature sensor. Applications include
portable medical instruments, monitoring equipment, battery backup systems,
industrial handhelds, industrial lighting, military equipment, ruggedized
notebooks/tablet computers, and remote-powered communication and telemetry

The LTC4013 is housed in a 28-lead 4 x 5-mm QFN package with an exposed metal pad. E- and I-grade devices are guaranteed for operation from −40°C to 125°C. 1,000-piece pricing starts at $3.95 each. For more information, visit