Battery charger system with integrated power switch for Li-Ion/Li-Polymer

The L6924D is a fully monolithic battery charger dedicated to single-cell Li-Ion/Polymer battery packs. It is the ideal solution for space-limited applications, like handheld equipment, and digital cameras. It integrates all of the power elements (the power MOSFET, reverse blocking diode and the sense resistor) in a small VFQFPN16 (3 x 3 mm) package. When an external voltage-regulated wall adapter is used, the L6924D 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. Regardless of the charging approach, a closed-loop thermal control avoids device overheating. The device has an operating input voltage ranging from 2.5 V to 12 V. The L6924D allows the user to program many parameters, such as pre-charge current, fast-charge current, pre-charge voltage threshold, end-of-charge current threshold, and charge timer. The L6924D offers two open collector outputs for diagnostic purposes, which can be used to either drive two external LEDs or communicate with a host microcontroller. Finally, the L6924D also provides very flexible control of the charge process termination and gas gauge capability, as well as other functions, such as checking for battery presence, and monitoring and protecting the battery from unsafe thermal conditions.

Key Features

  • Fully integrated solution, with a power MOSFET, reverse blocking diode, sense resistor, and thermal protection
  • Ideal for coke and graphite anode single-cell LI -ION packs
  • Both linear and quasi-pulse operation
  • Closed loop thermal control
  • USB BUS-compatible
  • Programmable charge current up to 1 A
  • Programmable pre-charge current
  • Programmable end-of-charge current
  • Programmable pre-charge voltage threshold
  • Programmable charge timer
  • Programmable output voltage at 4.1 V and 4.2 V, with ± 1 % output voltage accuracy
  • (NTC) or (PTC) thermistor interface for battery temperature monitoring and protection
  • Flexible charge process termination
  • Status outputs to drive LEDs or to interface with a host processor
  • Small VFQFPN 16-lead package (3 x 3 mm)

电路原理图

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资源

技术文档

产品规格
Description Version Size
DS4546 DS4546: Battery charger system with integrated power switch for Li-Ion/Li-Polymer 10.0 1 MB
用户手册
Description Version Size
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Design Notes & Tips
Description Version Size
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出版刊物和宣传资料

选型指南
Description Version Size
Linear and Switching Voltage Regulators Selection Guide 3.0 370 KB
手册
Description Version Size
Brochure Power management guide 09.2017 4 MB

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样片和购买

型号 Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L6924D013TR VFQFPN 16 3x3x1.0 Tape And Reel Active 0.75 1000 NEC EAR99 PHILIPPINES MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

质量和可靠性

型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6924D013TR ActiveVFQFPN 16 3x3x1.0-Ecopack2 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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