1-A Single Cell Battery Linear Charger with High-Input Voltage TPB4056A

◉ The TPB4056A is a cost-effective, high-integration linear charger for single-cell Li-ion or Li-ion polymer batteries. The device supports CC/CV charge from either a USB port or an AC adapter. The low BOM component requirement makes the whole system small in size. The high input voltage range with over-voltage protection supports lowcost unregulated adapters.The charge current of the TPB4056A is fully programmable up to 1000 mA with an external resistor. The TPB4056A automatically terminates the charge cycle when the charge current drops below a programmable minimal charging current of the set charge current value after reaching the float voltage.

◉ The TPB4056A implements two indication pins, PPR and CHG, allowing connection to a microcontroller or LED to show the status of the device. With the open-drain structure, the PPR pin stays low while the input voltage is within the operation range, and the CHG pin stays low during the charging state. Else pins are in the high impedance state.

◉ The TPB4056A features the thermal foldback function to limit the charge current and protect the device from overjunction temperature faults. The TPB4056A also integrates the current monitor, UVLO, and OVP function to prevent the device from damage.