FAN54041UCX データシートの表示（PDF） - Fairchild Semiconductor

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FAN54041UCX

USB-OTG, 1.55 A, Li-Ion Switching Charger with Power Path and 2.3 A Production Test Support

Fairchild Semiconductor 

July 2013

FAN54040 — FAN54047

USB-OTG, 1.55 A, Li-Ion Switching Charger with Power

Path and 2.3 A Production Test Support

Features

 Fully Integrated, High-Efficiency Charger for Single-Cell

Li-Ion and Li-Polymer Battery Packs

 Power Path Circuit Ensures Fast System Startup with a

Dead Battery when VBUS is Connected

 1.55 A Maximum Charge Current

 Float Voltage Accuracy:

- 0.5% at 25°C

- 1% from 0 to 125°C

 5% Input and Charge Current Regulation Accuracy

 Temperature-Sense Input Prevents Auto-Charging for

JEITA Compliance

 Thermal Regulation and Shutdown

 4.2 V at 2.3 A Production Test Mode

 5 V, 500 mA Boost Mode for USB OTG

 28 V Absolute Maximum Input Voltage

 6 V Maximum Input Operating Voltage

 Programmable through High-Speed I2C Interface

(3.4 Mb/s) with Fast Mode Plus Compatibility

- Input Current

- Fast-Charge / Termination Current

- Float 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

 Dynamic Input Voltage Control

 Very Low Battery Current when Charger Inactive

Applications

 Cell Phones, Smart Phones, PDAs

 Tablet, Portable Media Players

 Gaming Device, Digital Cameras

All trademarks are the property of their respective owners.

© 2012 Fairchild Semiconductor Corporation

FAN54040 – FAN54047 • Rev. 1.0.2

Description

The FAN5404X family includes I2C controlled 1.55 A USB-

compliant switch-mode 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 VBUS 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 parameters and operating modes are

programmable through an I2C Interface that operates up to

3.4 Mbps. The charger and boost regulator circuits switch 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 I2C port.

Dynamic input voltage control prevents a weak adapter’s

voltage from collapsing, ensuring charging capability from

such adapters.

The FAN5404X is available in a 25-bump, 0.4 mm pitch,

WLCSP package.

VBUS

CBUS

PGND

PMID

CMID

POK_B

ILIM

SDA

SCL

DIS

STAT

AGND

FAN5404X

SW L1

SYS

CSYS

Q5

GATE

External

PMOS

VBAT

NTC

REF RREF

CREF

T

SYSTEM

LOAD

CBAT

BATTERY

+

Figure 1. Typical Application

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