Introduction: 

AX5056H is a complete single-cell Li-ion battery linear charger with constant current/voltage and Li-ion reverse polarity protection to protect the chip and user safety. Due to the internal PMOSFET architecture and the anti-reverse charging circuit, no external detection resistors and isolation diodes are required. Thermal feedback (internal temperature) regulates the charging current to limit the chip temperature during high power operation or high ambient temperature conditions. The charging voltage is fixed at 4.2V and the charging current can be set externally via a resistor. The AX5056H will automatically terminate the charge cycle when the charge current drops to 1/10 of the set value after the final float voltage is reached. When the input voltage (AC adapter or USB power) is removed, the AX5056H automatically enters a low-current state, reducing the battery leakage current to less than 0.25μA. The AX5056H can also be placed in shutdown mode to reduce the supply current to 25μA. Other features of the AX5056H include a charge current monitor, undervoltage lockout, automatic recharge, and a status pin to indicate the end of charging and input voltage access.

Features: 

※ Programmable charge current up to 1.2A.

※ No MOSFETs, detector resistors, or isolation diodes are required.

※ Constant current/constant voltage operation with thermal regulation to maximise charge rate without risk of overheating.

※ Charges a single lithium-ion battery directly from the USB port.

※ 4.2V preset charging voltage with ±1% accuracy.

※ Charge current monitor output for battery level detection.

※ Automatic re-charging.

※ Over-voltage protection for charging input voltage.

※ 2.9V trickle charge.

※ Soft start limits inrush current.

※ C/10 charging termination.

※ 30VPIN pin withstand voltage.

※ ESOP-8, DFN2X2-8 package.

Applications: 

※ Mobile phones, PDAs, MP3 players 

※ Charging cradles, Bluetooth applications, other handheld devices.