Battery Charger Li-Ion 2300mA 4.2V 25-Pin WLCSP T/R

The FAN5404X family includes It controlled I2C A USB- compliant chargers With power path operation and USB OTG boost operation. Integrated With the charger, the IC supports production test mode, Which provides 4.2 V at up to 2.3 A to the system. To facilitate fast system startup, the IC includes a power path circuit, Which disconnects the battery from the system rail, ensuring that the system can power up quickly following a VBIJS connection. The power path circuit ensures that the system rail Stays up when the charger is plugged in, even if the battery is dead or shorted. The charging pararneters and operating modes are programmable through an 12C Interface that operates up to 3.4 Mbps. The charger and boost regulator circuits svhtch at 3 MHz to minimize the size Of external passive components. The FAN5404X provides battery charging in three phases: conditioning, constant current, and constant voltage. The integrated circuit 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. Charge status is reported back to the host through the 12C port. Dynamic input voltage control prevents a weak adapter"s voltage from collapsing, ensuring charging capability from such adapters.

• PN Bits: IC_INFO(5:3): 000
• Fully Integrated, High-Effciency Charger for Single-cell Li-lon and Li-PoIymer Battery Packs
• Pover Path Circuit Ensures Fast System Startup With a Dead Battery When VBUS is Connected
• I .55 A Maximum Charge Current
• Float Voltage Accuracy:
  • ±0.5% at 25
• C
  • ±1%from oto 125
• C
• ±5% Input and Charge Current Regulation Accuracy
• Temperature-Sense Input Prevents Auto-charging for JEITA Compliance
• Thermal Regulation and Shutdovm
• 4.2 V at 2.3 A Production Test Mode
• 5 V, 500 rnA Boost Mode for USB OTG
• 28 V Absolute Maximum Input Voltage
• 6 V Maximum Input Operating Voltage
• Programmable through High-Speed Interface (3.4 Mb"s) With Fast Mode Plus Compatibility
  • Input Current
  • Fast-Charge I Termination Current
  • Float Voltage
  • Termination Enable
• 3 MHz Synchronous Buck PWM Controller with Wide Duty Cycle Range
• Small Footprint I pH External Inductor
• Safety Timer With Reset Control
• Dynamic Input Voltage Control
• Very LOW Battery Current When Charger Inactive