STCF02

The STCF02 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 the battery voltage (particularly in the case, that the output voltage is lower than the input voltage); the output current control ensure a good current regulation over the forward voltage spread characteristics of the Flash LED.

Three logic input signal can select 5 modes of operation: shutdown mode (quiescent current less than 1A typ), shutdown mode with NTC active, torch mode (Drive the led up to 250 mA), flash mode (up to 600 mA) and medium flash mode that reduce the flash current.

The high efficiency of the converter allows having the input current taken from the battery lower than 1.5A and the peak inductor current is limited to 2.3 Amps typical. Other features include softstart control, thermal shutdown, short circuit protection, over voltage protection and LED temperature protection. Alternatively to LED temperature protection, a safety flash time out can be easily  implemented. The device is packaged in a QFN 20 leads with a dimension of 4x4 mm and a height of less than 1mm.