BQ24150 Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support | TI.com

BQ24150 (NRND)

Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support - BQ24150
 

Not Recommended for New Designs (NRND)

Replaced By BQ24150A – The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.

Description

The bq24150/1 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 bq24150/1 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 bq24150/1 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, bq24150/1 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.

During the charging process, the bq24150/1 monitors its junction temperature (TJ) and reduces the charge current once TJ increases to approximately 125°C. To support USB OTG device, bq24150/1 provides VBUS (approximately 5.05 V) by boosting the battery voltage. The bq24150/1 is available in 20-pin WCSP package.

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
    • 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
  • Safety Timer with Reset Control
  • Reverse Leakage Protection Prevents Battery Drainage
  • Thermal Regulation and Protection
  • Input/Output Overvoltage Protection
  • Status Output for Charging and Faults
  • USB Friendly Boot-Up Sequence
  • Automatic Charging – bq24150
  • Automatic High Impedance Mode – bq24151
  • Boost Mode Operation for USB OTG:
    • Input Voltage Range (from Battery): 2.5 V to 4.5 V
    • Output Voltage for VBUS: 5.05 V
  • 1.976 x 1.946mm 20-Pin WCSP Package
  • APPLICATIONS
    • Mobile and Smart Phones
    • MP3 Players
    • Handheld Devices

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