STCF04 Datasheet, PDF (6/43 Pages) STMicroelectronics – Cell phones and smartphones

Description (continued)
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Description (continued)
STCF04
All the functions of the device are controlled through the I²C bus which reduces the number
of logic pins of the package and saves PCB tracks on the application board. Hard and soft-
triggering of flash and torch are both supported. The device includes many functions to
protect the chip and the power LEDs. These include a soft-start control, chip
overtemperature detection and protection, and shorted LED detection and protection. In
addition, a digital programmable timeout function protects the LEDs in case of a wrong
command issued by the microprocessor. An optional external NTC is supported to protect
the LEDs against overheating. It is possible to separately program the current intensity in
Flash and Torch mode through I²C. In order to guarantee the proper function of Flash mode,
the SuperCap voltage should be monitored by the microprocessor using the READY pin
feature. In case of insufficient power from the SuperCap, a warning is generated. The device
is packaged in BGA 3 x 3 mm with 1 mm height.
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Doc ID 022927 Rev 3