FAN5402

www.DataSheet.co.kr FAN5400 Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator September 2011 FAN5400 / FAN5401 / FAN5402 / FAN5403 / FAN5404 / FAN5405 USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator Features          Fully Integrated, High-Efficiency Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs Faster Charging than Linear Charge Voltage Accuracy: 0.5% at 25°C 1% from 0 to 125°C Description The FAN5400 family (FAN540X) combines a highly integrated switch-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery. The charging parameters and operating modes are 2 programmable through an I C Interface that operates up to 3.4Mbps. The charger and boost regulator circuits switch at 3MHz to minimize the size of external passive components. The FAN540X provides battery charging in three phases: conditioning, constant current, and constant voltage. To ensure USB compliance and minimize charging time, the 2 input current is limited to the value set through the I C host. Charge termination is determined by a programmable minimum current level. A safety timer with reset control provides a safety backup for the I2C host. The integrated circuit (IC) automatically restarts the charge cycle when the battery falls below an internal threshold. If the input source is removed, the IC enters a ...