LT8490 - High Voltage, High Current Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT)

The LT®8490 is a buck-boost switching regulator battery charger that implements a constant-current constantvoltage (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 LT8490 can perform automatic temperature compensation by sensing an external thermistor thermally coupled to the battery. STATUS and FAULT pins containing charger information can be used to drive LED indicator lamps. The device is available in a low profile (0.75mm) 7mm × 11mm 64-lead QFN package.

Features

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
No Software or Firmware Development Required
Operation from Solar Panel or DC Supply
Input and Output Current Monitor Pins
Four Integrated Feedback Loops
Synchronizable Fixed Frequency: 100kHz to 400kHz
64-Lead (7mm × 11mm × 0.75mm) QFN Package

Typical Application

Applications

Solar Powered Battery Chargers
Multiple Types of Lead-Acid Battery Charging
Li-Ion Battery Charger
Battery Equipped Industrial or Portable Military Equipment

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LT8490EUKJ#PBF	7x11 QFN-64	E	$14.79	$10.35
LT8490EUKJ#TRPBF	7x11 QFN-64	E		$10.41
LT8490IUKJ#PBF	7x11 QFN-64	I	$16.29	$11.40
LT8490IUKJ#TRPBF	7x11 QFN-64	I		$11.46

Demo Boards

Part Number	Description	Price
DC2069A	LT8490 Demo Board \| High Efficiency MPPT Buck-Boost Battery Charger Controller 17V to 54V up to 200W solar panel Vin. 12V SLA battery @ up to 16.6A charge current	$195.00