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Home » NEWEST Products » New by Manufacturer » STMicroelectronics » STM L6924U USB Compatible Battery Charger System
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STMicroelectronics L6924U USB Compatible Battery Charger System

STMicroelectronics L6924U USB Compatible
Battery Charger System

STMicroelectronics L6924U USB Compatible Battery Charger System is a fully monolithic battery charger that safely charges single-cell Li-Ion/Polymer battery from either an USB power source or an AC adapter. In USB mode, the L6924U supports both low power and high power mode. Alternatively the device can charge from an AC wall adapter. The ideal solution for space-limited portable products integrates the power MOSFET, reverse blocking diode, sense resistor and thermal protection into a compact VFQFPN16 package. The device has an operating input voltage ranging from 2.5 V to 12 V and it allows the user to program many parameters, such as fast-charge current, end-of-charge current threshold, and charge timer.

Features
  • Fully integrated solution, with power MOSFET, reverse blocking diode, sense resistor, and thermal protection
  • Charges single-cell Li-Ion batteries from selectable AC adapter or USB input
  • Programmable charge current up to 1 A in AC adapter mode
  • Programmable charging current in USB mode for both high power and low power inputs
  • 4.2 V output voltage with ± 1 % accuracy
  • Linear or quasi-pulse operating mode
  • Closed loop thermal control
  • Programmable end-of-charge current
  • Programmable charge timer
  • (NTC) or (PTC) thermistor interface for battery temperature monitoring and protection
  • Status outputs to drive LEDs or to interface with a host processor
  • Small VFQFPN 16-leads package (3 x 3 mm)
Applications
  • PDAs, GPS and MP3 players
  • USB powered devices
  • Cellular phones
  • Digital still cameras
  • Standalone chargers
  • Wireless appliances

Additional Resources

Datasheet
L6924U Product Info
Block Diagram
Block Diagram

STMicroelectronics USB Compatible
Battery Charger Demonstration Board

STMicroelectronics STEVAL-ISA076V2 Demonstration Board is based on the L6924U which is a fully monolithic battery charger dedicated to single-cell Li-Ion/Polymer battery packs. It is the ideal solution for space-limited applications, such as PDAs, handheld equipment, cellular phones, and digital cameras. When an external voltage regulated adapter or USB port is used, the L6924U works in linear mode, and charges the battery in a constant current/constant voltage (CC/CV) profile. Moreover, when a current-limited adapter is used, the device can operate in Quasi-Pulse Mode, dramatically reducing the power dissipation.

Additional Resources

Datasheet
STEVAL-ISA076V2 Product Info
 

View Product Detail

  • STMicroelectronics
  • Power Management
  • Semiconductors|Integrated Circuits|IC-Power Management