BQ24314C Datasheet, PDF (1/26 Pages) Texas Instruments – Li+ Charger Front-End Protection IC

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bq24314C
SLUSAV3A – AUGUST 2012 – REVISED JULY 2015
bq24314C Overvoltage and Overcurrent Protection IC and
Li+ Charger Front-End Protection IC
1 Features
•1 Provides Protection for Three Variables:
– Input Overvoltage, with Rapid Response in
<1 µs
– User-Programmable Overcurrent with Current
Limiting
– Battery Overvoltage
• Maximum Input Voltage of 30 V
• Supports up to 1.5-A Input Current
• Robust Against False Triggering Due to Current
Transients
• Thermal Shutdown
• Enable Input
• Status Indication – Fault Condition
• Available in Space-Saving Small 8 Lead 2 × 2
WSON Package
2 Applications
• Mobile Phones and Smart Phones
• PDAs
• MP3 Players
• Low-Power Handheld Devices
• Bluetooth™ Headsets
3 Description
The bq24314C device is a highly integrated circuit
(IC) designed to provide protection to Li-ion batteries
from failures of the charging circuit. The device
continuously monitors the input voltage, the input
current, and the battery voltage. In case of an input
overvoltage condition, the device immediately
removes power from the charging circuit by turning
off an internal switch. In the case of an overcurrent
condition, it limits the system current at the threshold
value, and if the overcurrent persists, switches the
pass element OFF after a blanking period.
Additionally, the device also monitors its own die
temperature and switches off if it exceeds 140°C. The
input overcurrent threshold is user-programmable.
The device can be controlled by a processor and also
provides status information about fault conditions to
the host.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24314C
WSON (8)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
AC Adapter
VDC
GND
1 µF
1 IN
OUT 8
bq24314C
VBAT 6
FAULT 4
CE 5
2
7
1 µF
bq24080
Charger IC
SYSTEM
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.