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FAN54012UCX(1) Fiches technique(PDF) 1 Page - Fairchild Semiconductor |
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FAN54012UCX(1) Fiches technique(HTML) 1 Page - Fairchild Semiconductor |
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1 / 36 page /493/1/FAN54012UCX(1).png) July 2012 © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5401X Family • Rev. 1.0.4 FAN54010 / FAN54011 / FAN54012 / FAN54013 / FAN54014 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 5% Input Current Regulation Accuracy 5% Charge Current Regulation Accuracy 20 V Absolute Maximum Input Voltage 6 V Maximum Input Operating Voltage 1.45 A Maximum Charge Rate Programmable through High-Speed I2C Interface (3.4 Mb/s) with Fast Mode Plus Compatibility – Input Current – Fast-Charge / Termination Current – Charger Voltage – Termination Enable 3 MHz Synchronous Buck PWM Controller with Wide Duty Cycle Range Small Footprint 1H External Inductor Safety Timer with Reset Control 1.8 V Regulated Output from VBUS for Auxiliary Circuits Weak Input Sources Accommodated by Reducing Charging Current to Maintain Minimum VBUS Voltage Low Reverse Leakage to Prevent Battery Drain to VBUS 5 V, 500 mA Boost Mode for USB OTG for 3.0 V to 4.5 V Battery Input Applications Cell Phones, Smart Phones, PDAs Tablet, Portable Media Players Gaming Device, Digital Cameras Description The FAN54010 family (FAN5401X) 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 programmable through an I 2C Interface that operates up to 3.4 Mbps. The charger and boost regulator circuits switch at 3MHz to minimize the size of external passive components. The FAN5401X provides battery charging in three phases: conditioning, constant current, and constant voltage. To ensure USB compliance and minimize charging time, the input current is limited to the value set through the I 2C host. Charge termination is determined by a programmable minimum current level. A safety timer with reset control provides a safety backup for the I 2C 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 high-impedance mode with leakage from the battery to the input prevented. Charge status is reported back to the host through the I 2C port. Charge current is reduced when the die temperature reaches 120°C. The FAN5401X can operate as a boost regulator on command from the system. The boost regulator includes a soft-start that limits inrush current from the battery. The FAN5401X is available in a 1.96 x 1.87 mm, 20-bump, 0.4 mm pitch, WLCSP package. Figure 1. Typical Application All trademarks are the property of their respective owners. |
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