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High power white LED SuperCap driver with I²C interface
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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.

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Errata Sheet
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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

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS8947: High power white LED SuperCap™ driver with I²C interface
3.0 1,509 KB

Application Notes

Description Version Size
AN3223: Driver for double flash LED with I²C interface
2.1 1,407 KB

Publications and Collaterals


Description Version Size
ST’s solutions for mobile devices
2,855 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STCF04TBRActiveuTFBGA 25 3x3x1.1Tape And Reel-4085_-No availability reported, please contact our Sales officeEcopack2-

(*) 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
(**) The Material Declaration forms available on 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.