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FAN54015UCX データシート(PDF) 1 Page - Fairchild Semiconductor

部品番号 FAN54015UCX
部品情報  USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
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メーカー  FAIRCHILD [Fairchild Semiconductor]
ホームページ  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN54015UCX データシート(HTML) 1 Page - Fairchild Semiconductor

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December 2012
© 2012 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN54015 • Rev. 1.0.0
FAN54015
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 1 H External Inductor
Safety Timer with Reset Control
1.8 V Regulated Output from VBUS for Auxiliary Circuits
Dynamic Input Voltage Control
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
Available in a 1.96 x 1.87 mm, 20-bump, 0.4 mm Pitch
WLCSP Package
Applications
Cell Phones, Smart Phones, PDAs
Tablet, Portable Media Players
Gaming Device, Digital Cameras
Description
The FAN54015 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
3 MHz to minimize the size of external passive components.
The FAN54015 provides battery charging in three phases:
conditioning, constant current and constant voltage.
To ensure USB compliance and minimize charging time, the
input current limit can be changed through the I
2C by the
host processor. 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.
Charge status is reported to the host through the I
2C port.
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, preventing leakage from the battery to the input.
Charge current is reduced when the die temperature reaches
120°C, protecting the device and PCB from damage.
The FAN54015 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 and uses
the same external components used for charging the battery.
Figure 1. Typical Application
All trademarks are the property of their respective owners.


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