BQ24650RVAT

The BQ24650RVAT is a synchronous switch-mode integrated Battery-charge Controller for solar power with maximum power point tracking provides input voltage regulation, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a solar panel, the input regulation loop lowers the charge current so that the solar panel can provide maximum power output. The BQ24650 offers a constant-frequency synchronous PWM controller with high accuracy current and voltage regulation. The charge controller charges the battery in three phases such as pre-conditioning, constant current and constant voltage. Charge is terminated when the current reaches 1/10 of the fast charge rate. The pre-charge timer is fixed at 30 minutes. The charge controller automatically restarts the charge cycle if the battery voltage falls below an internal threshold and enters a low quiescent current sleep mode when the input voltage falls below the battery voltage.

• Maximum Power Point Tracking (MPPT) capability by input voltage regulation
• Programmable MPPT setting
• Resistor programmable float voltage
• ±0.5% Charge-voltage regulation
• ±3% Charge-current regulation
• ±0.6% Input voltage regulation
• Internal loop compensation
• Internal digital soft start
• Input over-voltage protection
• Battery temperature sensing
• Battery absent detection
• Thermal shutdown
• Charge status outputs for led or host processor
• Charge enable on MPPSET pin
• Automatic sleep mode for low power consumption
• <lt/>15μA Off-state battery discharge current
• Green product and no Sb/Br