BQ24180_1 Datasheet, PDF (1/41 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and Accessory Power Connection

bq24180
www.ti.com
SLUSA02 A – FEBRUARY 2010 – REVISED FEBRUARY 2010
Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and
Accessory Power Connection
Check for Samples: bq24180
FEATURES
1
•2 Charge Faster than Linear Chargers From
Current Limited Input Sources
• High-Accuracy Voltage and Current Regulation
– Input Current Regulation Accuracy: ±5%
(100mA, 500mA)
– Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0–125°C)
– Charge Current Regulation Accuracy: ±5%
• Accessory Power Output (DCOUT)
• Input Voltage Based Dynamic Power
Management
• Safety Limit Register for Maximum Charge
Voltage and Current Limiting
• High-Efficiency Mini-USB/AC Battery Charger
for Single-Cell Li-Ion and Li-Polymer Battery
Packs
• 20-V Absolute Maximum and 16.5V Operation
Input Voltage Rating
• Built-in Input Current Sensing and Limiting
• Integrated Power FETs for Up to 1.5-A Charge
Rate
• Programmable Charge Parameters through
I²C™ compatible Interface (up to 3.4 Mbps)
• Synchronous Fixed-Frequency PWM
Controller Operating at 3 MHz With 0% to
99.5% Duty Cycle
• Safety Timer and Software Watchdog
• Reverse Leakage Protection Prevents Battery
Drainage
• Thermal Regulation and Protection
• Status Outputs for Charging and Faults
• 25-Pin WCSP Package
APPLICATIONS
• Mobile Phones and Smart Phones
• Portable Media Players
• Handheld Devices
DESCRIPTION
The bq24180 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for
single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters
is programmable using an I²C compatible interface. The bq24180 integrates a synchronous PWM controller,
power MOSFETs, input current sensing and overvoltage protection, high-accuracy current and voltage regulation,
and charge termination, into a small WCSP package.
VBUS
VBUS
D+
D-
GND
POWER FOR
ACCESSORY
C8
1 µF
C1
1 µF
C3
4.7 µF
C7
1 µF
VBUS
USB PHY
Hardware Disable
R3
4 kW
VBUS
SW
PMID
BOOT
PGND
bq24180
CSIN
DRV
CSOUT
PSEL
CD
TS
SCL
SDA
C4
10 nF
RSNS
68 mW
C2
10 µF
TEMP
PACK +
PACK -
C5
C6
0.1 µF 1 µF
VAUX
R1
R2
R4
10 kW 10 kW 10 kW
SYSTEM
HOST
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.
I²C is a trademark of Phillips Electronics.
2
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