製品概要
概要
The STCF06 is a high efficiency power supply solution to drive a single flash LED in camera phones, PDAs and other battery powered devices. It is a buck-boost converter able to guarantee a proper LED current control over all possible conditions of battery voltage and LED forward voltage. The output current control ensures a good current regulation over the forward voltage spread characteristics of the flash LED. 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. Hard and soft-triggering of flash are both supported. The device includes many functions to protect the chip and the power LED, such as: soft start control, chip over temperature, open and shorted LED detection and protection.
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特徴
- Buck-boost DC-DC converter
- Drives one power LED up to:
- 1.5 A between 3.5 V to 5.5 V
- 1.3 A between 3.0 V to 5.5 V
- 1 A between 2.7 V to 5.5 V
- Efficiency up to 80%
- Output current control
- 1.8 MHz fixed frequency PWM
- Full I²C control
- Operational modes:
- Shutdown mode
- Ready mode + auxiliary red LED
- Ready mode + NTC
- Flash mode: up to 1.5 A
- Torch mode: up to 370 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 over temperature detection and protection with external NTC resistor
- Open and shorted LED failure detection and protection
- Chip over temperature detection and protection
- < 1 μA shutdown current
- Package 3 x 3 mm TFBGA25
回路ダイアグラム
EDAシンボル / フットプリント / 3Dモデル
STマイクロエレクトロニクス - STCF06
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