1.5A Dual Input Switchmode Charger | Schematic Diagrams


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1.5A Dual Input Switchmode Charger

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1.5A Dual Input Switchmode Charger

15A Dual Input Switchmode Charger

The bq24140 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 IC integrates two synchronous PWM chargers, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.

The IC 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.

Device Uses
  • Mobile Phones and Smart Phones
  • MP3 Players
  • Handheld Devices
Features
  • 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

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