AP5056SPER

The AP5056 is a complete single-chip linear power management IC for lithium-ion battery constant-current/constant-voltage charging. 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 ambient temperature is excessive or during high-power operation, thermal feedback regulates the charge current to reduce die 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 automatically terminates the charge cycle. When the input source (adapter or USB power) is removed, the AP5056 automatically enters a low-current state, reducing battery leakage current to below 2μA. The AP5056 can also be placed in shutdown mode, reducing supply current to 50μA. Additional features include: battery temperature monitoring, undervoltage lockout, automatic recharge, and two status pins to indicate charging and charge termination.

Applications

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

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
• Manages single-cell Li-Ion battery charging directly from USB interface
• 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
• Shutdown quiescent current 50μA
• Trickle charge threshold voltage 2.9V
• Soft-start to limit inrush current
• Battery temperature monitoring
• Available in 8-pin SOP8-PP and MSOP8-PP packages