800mA Standalone linear Li-Ion battery charger with thermal regulation

The STC4054 is a constant current/constant voltage charger for single cell Li-Ion batteries. No external sense resistor or blocking diode is required and its ThinSOT package make it ideally suited for portable applications.

The STC4054 is designed to work within USB power specifications. An internal block regulates the current when the junction temperature increases, in order to protect the device when it operates in high power or high ambient temperature.

The charge voltage is fixed at 4.2V, and the charge current limitation can be programmed using a single resistor connectd between PROG pin and GND. The charge cycle is automatically terminated when the current flowing to the battery is 1/10 of the programmed value. If the external adaptor is removed, the STC4054 turns off and a 2µA current can flow from the battery to the device. The device can be put into Shutdown Mode, reducing the supply current to 25µA. The device also has a charge current monitor, under voltage lockout, automatic recharge. The device is packaged in TSOT23-5L.

Key Features

  • 25µA supply current in shutdown mode
  • C/10 charge termination
  • Soft-start limits inrush current
  • Low battery voltage detect for precharge setting
  • TSOT23-5L package
  • Single charge status output pin
  • Automatic recharge
  • Programmable charge current up to 800mA
  • Constant current / constant voltage operation with thermal regulation to maximize charge rate without risk of overheating
  • No external MOSFET, sense resistors or blocking diode required
  • Preset 4.2V charge voltage with 1% accuracy
  • Charge current monitor output for gas gauging
  • Charges single cell li-ion batteries directly from USB port

电路原理图

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资源

技术文档

产品规格
Description Version Size
DS4902 DS4902: 800 mA standalone linear Li-Ion battery charger with thermal regulation 1.3 299 KB
应用手册
Description Version Size
AN2370 AN2370: 800 mA standalone linear Li-Ion battery charger with thermal regulation 4.3 228 KB

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
STC4054GR TSOT23-5L Tape And Reel Active 0.625 1000 NEC EAR99 MALAYSIA 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**
STC4054GR Active TSOT23-5L-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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