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
1
FEATURES
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•
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Integrated Power FETs for Up to 1.5-A Charge
Rate
2
•
Charge Faster than Linear Chargers From
Current Limited Input Sources
Programmable Charge Parameters through
I2C™ compatible Interface (up to 3.4 Mbps)
•
High-Accuracy Voltage and Current Regulation
Synchronous Fixed-Frequency PWM
Controller Operating at 3 MHz With 0% to
99.5% Duty Cycle
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Input Current Regulation Accuracy: ±5%
(100mA, 500mA)
Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0–125°C)
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Safety Timer and Software Watchdog
Reverse Leakage Protection Prevents Battery
Drainage
Charge Current Regulation Accuracy: ±5%
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Accessory Power Output (DCOUT)
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Thermal Regulation and Protection
Status Outputs for Charging and Faults
25-Pin WCSP Package
Input Voltage Based Dynamic Power
Management
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Safety Limit Register for Maximum Charge
Voltage and Current Limiting
APPLICATIONS
High-Efficiency Mini-USB/AC Battery Charger
for Single-Cell Li-Ion and Li-Polymer Battery
Packs
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Mobile Phones and Smart Phones
Portable Media Players
Handheld Devices
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20-V Absolute Maximum and 16.5V Operation
Input Voltage Rating
Built-in Input Current Sensing and Limiting
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.
POWER FOR
ACCESSORY
C 8
1 µF
SYSTEM
RSNS
68 mW
VBUS
VBUS
PMID
SW
C1
1 µF
C4
10nF
C2
10µF
PACK
+
BOOT
PGND
TEMP
HOST
C3
4.7 µF
bq24180
CSIN
PACK -
CSOUT
DRV
C7
1 µF
C 5
0.1 µF
C 6
1 µF
VAUX
R2
VBUS
D+
D-
VBUS
PSEL
CD
R1
10 kW
R4
TS
USB PHY
10 kW 10 kW
GND
SCL
SDA
Hardware Disable
R3
4 kW
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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.
2
I2C is a trademark of Phillips Electronics.
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