Summary of ANALOG DEVICES LT8491 BUCK-BOOST BATTERY CHARGE CONTROLLER
Analog Devices LT8491 is a buck-boost battery charge controller that provides CCCV charging for SLA, flooded, gel, and lithium-ion batteries. It operates with input voltages above, below, or equal to battery voltage, suitable for solar panels or DC supplies. Key features include wide VIN and VBAT ranges, single-inductor buck-boost topology, automatic MPPT, temperature compensation, I2C telemetry/configuration, internal EEPROM, four feedback loops, synchronizable fixed switching frequency, and a 64-lead QFN package.
Parts used in the LT8491 Buck-Boost Battery Charge Controller Project:
- LT8491 buck-boost battery charge controller IC
- Solar panel or DC power supply (as input source)
- Battery (SLA, flooded, gel, or lithium-ion)
- Single inductor (for buck-boost topology)
- External MOSFETs and passive components as required by typical application
- Temperature sensing component for automatic temperature compensation
- I2C interface connections for telemetry and configuration
- EEPROM (internal to LT8491 for configuration storage)
- 64-lead QFN PCB footprint (7mm x 11mm x 0.75mm)
Analog Devices Inc. LT8491 Buck-Boost Battery Charge Controller implements a constant-current constant voltage (CCCV) charging profile used for most battery types. This includes sealed lead-acid (SLA), flooded, gel, and lithium-ion.
The device operates from input voltages above, below, or equal to the output voltage and is powered by a solar panel or DC power supply.
Typical Application
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
- I2C Telemetry and Configuration
- Internal EEPROM for Configuration Storage
- Operation from Solar Panel or DC Supply
- Four Integrated Feedback Loops
- Synchronizable Fixed Frequency: 100kHz to 400kHz
- 64-Lead (7mm x 11mm x 0.75mm) QFN Package
Read more: ANALOG DEVICES LT8491 BUCK-BOOST BATTERY CHARGE CONTROLLER
- What battery types does the LT8491 support?
The LT8491 supports sealed lead-acid (SLA), flooded, gel, and lithium-ion batteries. - Can the LT8491 operate when VIN is below VBAT?
Yes, the LT8491 operates from input voltages above, below, or equal to the output voltage. - Is the LT8491 suitable for solar powered charging?
Yes, it is designed to be powered by a solar panel and includes automatic MPPT for solar charging. - Does the LT8491 provide temperature compensation?
Yes, the LT8491 includes automatic temperature compensation. - Does the device support telemetry and configuration?
Yes, it provides I2C telemetry and configuration and has internal EEPROM for configuration storage. - What input and battery voltage ranges does the LT8491 support?
VIN range is 6V to 80V and VBAT range is 1.3V to 80V. - What switching frequencies can the LT8491 synchronize to?
It supports a synchronizable fixed frequency from 100kHz to 400kHz. - What package does the LT8491 come in?
It comes in a 64-lead QFN package sized 7mm x 11mm x 0.75mm.
