BQ25040 Datasheet, PDF (1/25 Pages) Texas Instruments – 1.1A, Single-Input, Single Cell Li-Ion Battery Charger With 50mA LDO and 2.3A Production Test Support

bq25040
www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009
1.1A, Single-Input, Single Cell Li-Ion Battery Charger
With 50mA LDO and 2.3A Production Test Support
FEATURES
1
• 30V Input Rating, with Overvoltage Protection
(OVP)
• Input Voltage Dynamic Power Management
Feature
• 50mA Integrated Low Dropout Linear
Regulator (LDO)
• 1% Charge Voltage Regulation Accuracy
• 10% Charge Current Accuracy
• Single-Input Interface Selects USB 100mA,
500mA or User-Programmable Maximum Input
Current Limit
• 4.2V at 2.3A Production Test Mode
• Thermal Regulation and Thermal Shutdown
Protection for Output Current Control
• Soft-Start Feature to Reduce Inrush Current
• Status Indication – Power Good and
Charging/Done
• Available in Small 2mm × 3mm DFN-10
Package
APPLICATIONS
• Mobile Phones
• Smart Phones
• Portable Media Players
• Portable Navigation Devices
• Low-Power Handheld Devices
DESCRIPTION
The bq25040 is an 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 1.1A of charge
current.
The bq25040 has a single power output that charges the battery. A system load can be placed in parallel with
the battery. The charge current is programmed using the ISET and EN/SET inputs. The input current limit is
programmable to USB100, USB500 or a user programmed current limit up to 1.1A. Additionally, a 4.9V ±3%
50mA LDO is integrated into the IC for supplying low power external circuitry. The single-input interface
(EN/SET) is used to select the charge current and to place the bq25040 into Production Test Mode. In
Production Test Mode, the bq25040 operates as a linear regulator without a battery connected, where the output
is regulated at 4.2V and supplies up to 2.3A to calibrate GSM transceivers.
APPLICATION SCHEMATIC
R2
1 kW
Adaptor
DC+
GND
OR
USB Port
VBUS
GND
D+
D-
1 IN
C1
1mF
9
8
bq25040
R3
1 kW
BAT 10
C2
1mF
EN/SET 6
LDO 4
2
5
3,7
C3
1mF
R1
R2
680 W
2 kW
ABB
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 © 2009, Texas Instruments Incorporated