onsemi FAN54063UCX

The FAN54063 is a 1.55 A USB−compliant switch−mode charger featuring integrated power path operation, USB OTG boost support, JEITA temperature control, and production test mode support, in a small 25 bump, 0.4 mm pitch WLCSP package. To facilitate fast system startup, the IC includes an integrated power path circuit, which disconnects the battery from the system rail, ensuring that the system can power up quickly following a VBUS connection. The power path circuit ensures that the system rail stays up when the charger is plugged in, even if the battery is dead. The charging parameters and operating modes are programmable through an I²C Interface that operates up to 3.4 Mbps. The charger and boost regulator circuits switch at 3 MHz to minimize the size of external passive components. The FAN54063 provides battery charging in three phases: conditioning, constant current and constant voltage. The IC automatically restarts the charge cycle when the battery falls below a voltage threshold. If the input source is removed, the IC enters a high−impedance mode blocking battery current from leaking to the input. Charger status is reported back to the host through the I²C port. Dynamic input voltage control prevents a weak adapter’s voltage from collapsing, ensuring charging capability from such adapters. The FAN54063 is available in a space saving 2.4 mm x 2.0 mm WLCSP package.

• Fully Integrated, High−Efficiency Switch−Mode Charger for Single−Cell Li−Ion and Li−Polymer Batteries
• Integrated Power Path Circuit Ensures Fast System Startup with a Dead Battery when VBUS is Connected
• 1.55 A Maximum Charge Current
• Programmable High Accuracy Float Voltage: ±0.5% at 25°C, ±1% from 0 to 125°C
• ±5% Input and Charge Current Regulation Accuracy
• Temperature−Sense Input for JEITA Compliance
• Thermal Regulation and Shutdown
• 4.2 V at 2.3 A Production Test Support
• 5 V, 500 mA Boost Mode for USB OTG
• 28 V Absolute Maximum Input Voltage
• 6 V Maximum Input Operating Voltage
• Programmable through High−Speed I²C Interface (3.4 Mb/s) with Fast Mode Plus Compatibility: Input Current, Fast−Charge / Termination Current, Float Voltage, Termination Enable
• 3 MHz Synchronous Buck PWM Controller with Wide Duty Cycle Range
• Small Footprint 1 μH External Inductor
• Safety Timer with Reset Control
• Dynamic Input Voltage Control
• Very Low Battery Current when Charger Inactive

• Cell Phones, Smart Phones, PDAs
• Tablet, Portable Media Players