BQ24650 is a High-Efficiency Synchronous Switch-Mode Charger Controller Solar Battery Charger

This post sponsored by Texas Instruments.

BQ24650 is a highly integrated switch-mode battery charge controller.

It 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. BQ24650 offers a constant-frequency synchronous PWM controller with high-accuracy current and voltage regulation, charge preconditioning, charge termination, and charge status monitoring. The device charges the battery in three phases: 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. BQ24650 automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and it enters a low quiescent current sleep mode when the input voltage falls below the battery voltage. The device supports a battery from 2.1V to 26V with VFB set to a 2.1V feedback reference. The charge current is programmed by selecting an appropriate sense resistor. BQ24650 is available in a 16-pin, 3.5-by-3.5-mm2, thin QFN package.

By: Rachel Kalina

For more information about this product, click here.
For detailed information about the tool mentioned above, click here.
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To download a datasheet, click here.

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