Data Brief

For further information contact your local STMicroelectronics sales office.

December 2007

Rev 1

1/4

4

STEVAL-TLL003V1

Power flash LED driver evaluation board based on the STCF02

Features

power white LED driver

are selected using a combination of logic

signals (connected to three enable pins) Five

selectable operating modes:

– Shutdown mode: quiescent current less

than 1µA (typical)

– Shutdown mode with activated negative

temperature coefficient (NTC) LED

temperature sensing, useful for measuring

the temperature before starting both torch

and flash modes

– Torch mode: drives the LED up to 250 mA

– Flash mode: drives the LED up to 600 mA

– Middle flash mode: the current is set

between the torch and the flash mode

levels

Description

This evaluation board is dedicated to the design of

a flash LED driver using the STCF02 step-up/

down current mode converter, providing the

proper recommendations for PCB layout and

external components. The device can operate in

five modes which are selected using a

combination of logic signals (connected to three

enable pins). Also implemented is a simple

programmable RC circuit used to shut down the

device to prevent LED burning during flash mode

in the event of microcontroller fault. This

evaluation board drives a single flash LED with a

forward voltage range of 2.7 to 5 V.

STEVAL-TLL003V1

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