BQ25071-Q1 Datasheet, PDF (1/22 Pages) Texas Instruments – Automotive Qualified

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
bq25071-Q1
SLUSCD6 – APRIL 2016
bq25071-Q1 1-A, Automotive Qualified, Single-Cell LiFePO₄ Linear Battery Charger
with 50-mA LDO
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: -40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C5
• Single Cell LiFePO₄ Charging Algorithm
• 30-V Input Rating, With 10.5-V Overvoltage
Protection (OVP)
• 50-mA Integrated Low Dropout Linear Regulator
(LDO)
• Programmable Charge Current Through ISET and
EN Terminals
• Thermal Regulation and Protection
• Soft-Start Feature to Reduce Inrush Current
• Battery NTC Monitoring
• Charging Status Indication
• 10-Pin SON (2mm x 3mm) Package with Wettable
Flanks
2 Applications
• E-call for Cars
• Automotive Telematics
• Vehicle GPS Tracking
• Car Network Video Recorder
• Smart Key
• Automotive Entertainment backup battery
3 Description
The bq25071-Q1 is a highly integrated, linear,
LiFePO₄ battery charger targeted at space-limited
automotive applications. It accepts power from either
a USB port or AC adapter and charges a single-cell
LiFePO₄ battery with up to 1 A of charge current. The
30-V input rating supports low-cost unregulated
adapters.
The bq25071-Q1 has a single power output that
simultaneously charges the battery and powers the
system. The input current is programmable from 100
mA up to 1 A using the ISET input or configurable for
USB500. There is also a 4.9 V ±10% 50 mA LDO
integrated into the IC for supplying low power
external circuitry.
The LiFePO₄ charging algorithm removes the current
taper typically seen as part of the constant voltage
mode control used in Li-Ion battery charge cycles
which reduces charge time significantly. Instead, the
battery is fast charged to the overcharge voltage and
then allowed to relax to a lower float charge voltage
threshold. The charger integrates the power stage
with the charge current and voltage sense to achieve
a high level of accuracy in the current and voltage
regulation loops. An internal control loop monitors the
IC junction temperature through the charge cycle and
reduces the charge current if an internal temperature
threshold is exceeded.
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq25071-Q1
WSON (10)
2.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
USB or TA
VBUS
GND
D+
D-
Application Schematic
bq25071-Q1
CHG
IN
OUT
Pull-Up
STATUS
VDD
ABB
EN
BAT
TS
ISET
GND
LDO
PWRPD
TEMP
PACK +
PACK -
VCHG DET
USB DET
VUSBIN
ACDET
GPIO
Copyright © 2016, Texas Instruments Incorporated
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.