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FAN54011UCX: DescriptionUSB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator; File Size1MB，36 Pages; ManufacturerFairchild; Websitehttp://www.fairchildsemi.com/

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USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator

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FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator

July 2012

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

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 C 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 C host.

Charge termination is determined by a programmable

minimum current level. A safety timer with reset control

provides a safety backup for the I

C 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

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.

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 I

C 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 1H 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

Figure 1. Typical Application

All trademarks are the property of their respective owners.

FAN5401X Family • Rev. 1.0.4

www.fairchildsemi.com

FAN54011UCX Related Products

	FAN54011UCX	FAN54013_12	FAN54010UCX
Description	USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator	FAN54010 / FAN54011 / FAN54012 / FAN54013 / FAN54014	USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator

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