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STCF03ITBR Folha de dados(PDF) 1 Page - STMicroelectronics |
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STCF03ITBR Folha de dados(HTML) 1 Page - STMicroelectronics |
1 / 33 page September 2008 Rev 5 1/33 33 STCF03I High power white LED driver with I²C interface Features ■ Buck-boost DC/DC converter ■ Drives one power white LED up to: 800 mA between 3.3 V to 5.5 V 600 mA between 2.7 V to 5.5 V ■ Efficiency up to 92% ■ Output current control ■ 1.8 MHz typ fixed frequency PWM ■ Synchronous rectification ■ Full I²C control ■ Operational modes: Shutdown mode ■ Ready mode + auxiliary red LED Ready mode + NTC Flash mode: up to 800 mA Torch mode: up to 200 mA ■ Soft and hard triggering of flash ■ Flash and torch dimming with 16 exponential values ■ Dimmable red LED indicator auxiliary output ■ Internally or externally timed flash operation ■ Digitally programmable safety time-out in flash mode ■ LED overtemperature detection and protection with external NTC resistor ■ Opened and shorted LED failure detection and protection ■ Chip over temperature detection and protection ■ < 1 µA Shutdown current ■ Package (3x3 mm) TFBGA25 Applications ■ Cell phone and smart phones ■ Camera flashes/strobe ■ PDAs and digital still cameras Description The STCF03I is a high efficiency power supply solution to drive a single flash LED in camera phone, PDAs and other hand-held devices. It is a buck - boost converter to guarantee a proper LED current control over all possible conditions of battery voltage and output voltage; the output current control ensures a good current regulation over the forward voltage spread characteristics of the flash LED. Thanks to the high efficiency of the converter, the input current taken from the battery remains under 1.5 A. All the functions of the device are controlled through the I²C bus which helps to reduce logic pins on the package and to save PCB tracks on the board. (See 1: Description (continued)) TFBGA25 (3x3) Table 1. Device summary Order code Package Packaging STCF03ITBR TFBGA25 (3x3 mm) 3000 parts per reel www.st.com |
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