September 2011
FAN54010 / FAN54011 / FAN54012 / FAN54013 /
FAN54014 / FAN54015
USB-Compliant Single-Cell Li-Ion Switching Charger with
USB-OTG Boost Regulator
Features
Description
The FAN54010 family (FAN5401X) combines
a highly
.
Fully Integrated, High-Efficiency Charger for Single-Cell
Li-Ion and Li-Polymer Battery Packs
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.
.
.
Faster Charging than Linear
Charge Voltage Accuracy:
0.5% at 25°C
1% from 0 to 125°C
The charging parameters and operating modes are
programmable through an I2C Interface that operates up to
3.4Mbps. The charger and boost regulator circuits switch at
3MHz to minimize the size of external passive components.
.
.
.
.
.
.
5% Input Current Regulation Accuracy
5% Charge Current Regulation Accuracy
20V Absolute Maximum Input Voltage
6V Maximum Input Operating Voltage
1.45A Maximum Charge Rate
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 I2C 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.
Programmable through High-Speed I2C Interface
(3.4Mb/s) with Fast Mode Plus Compatibility
–
–
–
–
Input Current
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 I2C
port. Charge current is reduced when the die temperature
reaches 120°C.
Fast-Charge / Termination Current
Charger Voltage
Termination Enable
.
3MHz Synchronous Buck PWM Controller with Wide
Duty Cycle Range
.
.
.
.
Small Footprint 1H External Inductor
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.
Safety Timer with Reset Control
1.8V Regulated Output from VBUS for Auxiliary Circuits
The FAN5401X is available in a 1.96 x 1.87mm, 20-bump,
0.4mm pitch WLCSP package.
Weak Input Sources Accommodated by Reducing
Charging Current to Maintain Minimum VBUS Voltage
.
.
Low Reverse Leakage to Prevent Battery Drain to VBUS
5V, 500mA Boost Mode for USB OTG for 3.0 to 4.5V
Battery Input
Applications
.
.
.
Cell Phones, Smart Phones, PDAs
Tablet, Portable Media Players
Gaming Device, Digital Cameras
Figure 1. Typical Application
All trademarks are the property of their respective owners.
© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.2
www.fairchildsemi.com