High power white LED SuperCap driver with I²C interface

The STCF04 is a dedicated and space optimized high efficiency solution for driving a flash LED module in cameras, phones, PDAs and other handheld devices using the SuperCap technology. It is based on a DC-DC buck-boost converter, which ensures a proper and efficient charging control and monitoring of the SuperCap in the whole battery voltage range. The output current control ensures a good current regulation over the forward voltage spread characteristics of the flash LEDs in Torch and Flash mode operation. The SuperCap charging current is limited to a defined value which avoids overload of the battery. The SuperCap discharge current flows through the LEDs and the external MOSFET which must be chosen according to the desired flash current.

Key Features

  • Buck-boost converter with 1.5 A peak current limiting and synchronous rectification
  • Burst mode operation when output is charged
  • Input voltage range 2.5 V to 5.5 V
  • Programmable output charging voltage up to 5.5 V
  • Full I²C control
  • Operation modes:
    • Shutdown mode
    • Monitoring mode with NTC and SuperCap monitoring
    • Idle mode
    • Flash mode
    • Torch mode: up to 320 mA
  • Controlled LED current in all modes
  • Soft and hard triggering of Flash, Torch and Picture light modes
  • Torch dimming in 12 exponential steps
  • Flash dimming in 8 steps
  • Active balancing of SuperCap voltage
  • SuperCap status flag
  • Internally or externally timed flash operation
  • Digitally programmable safety timeout in Flash mode
  • Torch mode safety timeout
  • LED overtemperature detection and protection with external NTC resistor
  • Shorted LED failure detection and protection
  • Chip overtemperature detection and protection

设计

技术文档

产品规格
Description Version Size
DS8947 DS8947: High power white LED SuperCap™ driver with I²C interface 3.0 1 MB
应用手册
Description Version Size
AN3223 AN3223: Driver for double flash LED with I²C interface 2.1 1 MB

出版刊物和宣传资料

手册
Description Version Size
Brochure Power management guide 05.2016 7 MB
ST’s solutions for mobile devices 3.2 3 MB
支持和社区



样片和购买

型号 Marketing Status Quantity Unit Price (US$) * Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STCF04TBR Active - - uTFBGA 25 3x3x1.1 Tape And Reel -40 85 NEC EAR99 MALAYSIA MORE INFO
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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**
STCF04TBR ActiveuTFBGA 25 3x3x1.1IndustrialEcopack2
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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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