STEVAL-TLL008V2 Datasheet, PDF (1/4 Pages) STMicroelectronics – Programmable current limit

STEVAL-TLL008V2
Camera flash with SuperCap™ daughterboard
based on the STCF04
Data brief
Features
■ 1.8 MHz buck-boost converter with 1.2 A peak
■ Current limiting and synchronous rectification
■ Programmable current limit
t(s) ^{■ Burst mode operation when output is charged}
■ Selectable 200 mA / 400 mA SuperCap™
uc charging current
d _{■ Input voltage range 2.7 V to 5.5 V}
ro _{■ Programmable output charging voltage up to}
P _{5.5 V}
te _{■ Full I}2_{C control}
le _{■ Controlled LED current in all modes}
so _{■ Shorted LED failure detection and protection}
Ob ^{■ RoHS compliant}
) ^- _Description
ct(s ^{The STEVAL-TLL008V2 demonstration board is a}
u daughterboard working in conjunction with the
d _{STEVAL-TLL008V1 and was designed to}
ro demonstrate the performance of the STCF04
P device, which is a buck-boost converter with an
te ^{I2C interface dedicated to charging a}
SuperCap™.
ole All LEDs with a forward voltage range from 2.5 V
s _{to 5 V are compatible with the STCF04. The}
b_{forward voltage spread of any selected LED must,}
O_{however, be within this range (2.5 V to 5 V).}
It is possible to set the level of the LED current in
Flash mode and torch mode by setting the
dimming registers.
The maximum level of the LED current in Flash
mode can be set by changing the external flash
resistor.
June 2012
Doc ID 023187 Rev 1
For further information contact your local STMicroelectronics sales office.
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