BQ24140_14 Datasheet, PDF (1/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24140
www.ti.com
SLUSAO5 – OCTOBER 2011
Fully Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB
Compliance and USB-OTG Support
Check for Samples: bq24140
FEATURES
1
• High-Efficiency Mini-USB/AC Battery Charger
for Single-Cell Li-Ion and Li-Polymer Battery
Packs
• Charge Battery and Provide USB-OTG Support
at the Same Time
• 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%
• Boost Mode Operation for USB OTG:
– Input Voltage Range (from Battery): 2.3V to
4.5V
– Output for VBUS: 5.05V/500 mA
• Input Voltage Based Dynamic Power
Management Provides Protection Against
Current Limited Adapters
• Bad Adaptor Detection and Rejection
• Safety Limit Register for Added Security by
Limiting Maximum Charge Voltage and
Maximum Charge Current
• 20-V Absolute Maximum Input Voltage Rating
• 9.0-V Maximum Operating Input Voltage
• Charge Faster than Linear Chargers
• Built-in Input Current Sensing and Limiting
• Integrated Power FETs for up to 1.5-A Charge
Rate
• Programmable Charge Parameters Through
I²C Interface (up to 3.4 Mbps):
– Input Current
– Fast-Charge/Termination Current
– Charge Voltage (3.5-4.44V)
– Safety Timer with Reset Control
– Safety Timer with Reset Control
– Termination Enable
• Synchronous Fixed-Frequency PWM
Controller Operating at 3 MHz With 0% to
99.5% Duty Cycle
• Automatic High Impedance Mode for Low
Power Consumption
• Robust Protection
– Reverse Leakage Protection Prevents
Battery Drainage
– Thermal Regulation and Protection
– Input/Output Over Voltage Protection
• Status Output for Charging and Faults
• USB Friendly Boot-Up Sequence
• 2.35 × 2.65 mm 30-pin WCSP Package
APPLICATIONS
• Mobile Phones and Smart Phones
• MP3 Players
• Handheld Devices
AC Adapter or
Wireless Power
USB Adapter
10 kW ^{10 kW 10 kW}
10 kW _{10 kW 10 kW}
HOST
1 mF
4.7 mF
4.7 mF
4.7 mF
PMID1
VIN
VBUS
PMID2
SW1
BOOT1
SW2
BOOT2
1 mH
100 nF
1 mH
100 nF
68 mW
10 µF 47 µF
SCL
SDA
STAT
OTG
SLRST
DIS
CSIN
VBAT
VREF
1 mF
VREG
LED
GND
0.1 mF
PACK+
+
PACK-
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 © 2011, Texas Instruments Incorporated