AP5056

AP5056 is a complete single-chip lithium-ion battery constant-current/constant-voltage linear power management IC. Its SOP/MSOP package and minimal external components make it ideal for portable applications, and the AP5056 is specifically designed to comply with USB power supply specifications. Based on an internal MOSFET architecture, no external sense resistors or isolation diodes are required. When the ambient temperature is too high or during high-power operation, thermal feedback automatically adjusts the charge current to reduce the chip temperature. The charge voltage is fixed at 4.2V, and the charge current can be set via an external resistor. When the charge current drops to 1/10 of the programmed value after reaching the final float voltage, the AP5056 will automatically terminate the charge cycle. When the input (adapter or USB power) is removed, the AP5056 automatically enters a low-current state, reducing battery leakage current to below 0.5μA. The AP5056 can also be placed in a shutdown state, reducing supply current to 50μA. Additional features include: battery temperature monitoring, undervoltage lockout, automatic recharge, and two status pins to indicate charge and charge termination.

Applications

• Mobile phones, PDAs, MP3, MP4
• Chargers
• Digital cameras
• Electronic dictionaries
• Bluetooth, GPS navigation devices

Key features

• Programmable charge current up to 1000mA
• No external MOSFET, sense resistor, or isolation diode required
• Complete linear charger for single-cell Li-ion batteries in SOP/MSOP package
• Constant current/constant voltage operation with thermal regulation for maximizing charge rate without risk of overheating
• Direct USB interface management for single-cell Li-ion battery charging
• Preset charge voltage 4.2V
• Charge current monitor output for battery fuel gauging
• Automatic recharge
• Dual charge status outputs with battery absent and fault status indication
• 1/10 charge current termination
• Standby current 50uA
• 2.9V trickle charge threshold voltage
• Soft-start inrush current limiting
• Battery temperature sensing
• Available in 8-pin SOP8-PP and MSOP8-PP packages