BQ25060_1 Datasheet, PDF (1/24 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, and External Power Path Control

bq25060
www.ti.com
SLUSA32 – MAY 2010
1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, and External Power
Path Control
Check for Samples: bq25060
FEATURES
1
• 30V input Rating, With 10.5V Over-Voltage
Protection (OVP)
• FET Controller for External Battery FET for
External Power Path Control (BGATE)
• Input Voltage Dynamic Power Management
• 50mA integrated Low Dropout Linear
Regulator (LDO)
• Programmable Charge Current Through ISET
and EN Pin
• 0.5% Battery Voltage Regulation Accuracy
• 7% Charge Current Regulation Accuracy
• Thermal Regulation and Protection
• Battery NTC Monitoring During Charge
• Status Indication – Charging/Done
• Available in small 2mm × 3mm 10 Pin SON
Package
APPLICATIONS
• Smart Phones
• Mobile Phones
• Portable Media Players
• Low Power Handheld Devices
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
The bq25060 is a highly integrated Li-Ion linear
battery charger targeted at space-limited portable
applications. It operates from either a USB port or AC
Adapter and charges a single-cell Li-Ion battery with
up to 1A of charge current. The 30V input voltage
range with input over-voltage protections supports
low-cost unregulated adapters.
The bq25060 has a single power output that charges
the battery. The system load is connected to OUT.
The low-battery system startup circuitry maintains
OUT greater than 3.4V whenever an input source is
connected. This allows the system to start-up and run
whenever an input source is connected regardless of
the battery voltage. The charge current is
programmable up to 1A using the ISET input.
Additionally, a 4.9V 50mA LDO is integrated into the
IC for supplying low power external circuitry.
The battery is charged in three phases: conditioning,
constant current and constant voltage. In all charge
phases, an internal control loop monitors the IC
junction temperature and reduces the charge current
if an internal temperature threshold is exceeded. The
charger power stage and charge current sense
functions are fully integrated. The charger function
has high accuracy current and voltage regulation
loops, charge status display, and charge termination.
USB or Adaptor
VBUS
D+
D-
GND
C1
0.1uF
R1
1 kΩ
1 IN
bq25060
CHG ⁸
OUT 10
7 _EN
2 ISET
BGATE 9
BAT 6
TS ⁵
3 VSS
LDO ⁴
VGPIO
R2
100kΩ
C2
1uF
VGPIO
STATUS
VDD
QBAT
HOST
TEMP
PACK+
C4
0.1uF
PACK -
C3
0.1uF
VLDO
GPIO
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated