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BQ24150A Datasheet

Part NameBQ24150A TI
Texas Instruments TI
DescriptionFully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support
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DESCRIPTION
The bq24150A/1A 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 can be programmed through an I2C interface. The bq24150A/1A integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
The bq24150A/1A charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on user-selectable minimum current level. A safety timer with reset control provides a safety backup for I2C interface. During normal operation, bq24150A/1A automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status is reported to the host using the I2C interface.

FEATURES
• Charge Faster than Linear Chargers
• High-Accuracy Voltage and Current Regulation
   – Input Current Regulation Accuracy: ±5%
      (100 mA and 500 mA)
   – Charge Voltage Regulation Accuracy:
      ±0.5% (25°C), ±1% (0°C to 125°C)
   – Charge Current Regulation Accuracy: ±5%
• High-Efficiency Mini-USB/AC Battery Charger
   for Single-Cell Li-Ion and Li-Polymer Battery Packs
• 20-V Absolute Maximum Input Voltage Rating
• 6-V Maximum Operating Input Voltage
• Built-In Input Current Sensing and Limiting
• Integrated Power FETs for Up To 1.25-A Charge Rate
• Programmable Charge Parameters through I2C™ Interface (up to 3.4 Mbps):
   – Input Current
   – Fast-Charge/Termination Current
   – Charge Voltage (3.5 V to 4.44 V)
   – Safety Timer with Reset Control
   – Termination Enable
• Synchronous Fixed-Frequency PWM
   Controller Operating at 3 MHz With 0% to  99.5% Duty Cycle
• Robust Protection
   – Reverse Leakage Protection Prevents Battery Drainage
   – Thermal Regulation and Protection
   – Input/Output Overvoltage Protection
• Status Output for Charging and Faults
• Automatic High Impedance Mode for Low Power Consumption
• USB Friendly Boot-Up Sequence
• Automatic Charging – bq24150A
• Automatic High Impedance Mode – bq24151A
• Boost Mode Operation for USB OTG:
   – Input Voltage Range (from Battery): 2.5 V to 4.5 V
   – Output for VBUS: 5.05 V/ 200 mA
• 2 x 2 mm 20-Pin WCSP Package

APPLICATIONS
• Mobile and Smart Phones
• MP3 Players
• Handheld Devices

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Key Word

System  Voltage  Analog  Audio  Axial  Battery  Bipolar  Bridge  Camera  Chip  Clock  Color  Connector  Control  Controller  Converter  Counter  Crystal  Decoder  Digital 

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