High Voltage Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT) and IC

The LT8491 is a buck-boost switching regulator battery charger that implements a constant-current constant-voltage (CCCV) charging profile used for most battery types, including sealed lead-acid (SLA), flooded, gel and lithium-ion.

The device operates from input voltages above, below or equal to the output voltage and can be powered by a solar panel or a DC power supply. On-chip logic provides automatic maximum power point tracking (MPPT) for solar powered applications. The LT8491 can perform automatic temperature compensation by sensing an external thermistor thermally coupled to the battery. The STATUS pin can be used to drive an LED indicator lamp. The device is available in a low profile (0.75mm) 7mm × 11mm 64-lead QFN package.

Applications

* Solar Powered Battery Chargers

* Multiple Types of Lead-Acid Battery Charging

* Li-Ion Battery Charger

* Battery Equipped Industrial or Portable Military Equipment

* VIN Range: 6V to 80V

* VBAT Range: 1.3V to 80V

* Single Inductor Allows VIN Above, Below, or Equal to VBAT

* Automatic MPPT for Solar Powered Charging

* Automatic Temperature Compensation

* I2C Telemetry and Configuration