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STEVAL-TLL003V1
Power Flash Driver based on STCF02

 
 Features and Description  Technical Documentation  Resources
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Features and Description
Flash LED driver based on the STCF02 high-power white LED driver
High operating frequency: 1.8 MHz
The device can operate in five modes which are selected using a combination of logic signals (connected to three enable pins). The five selectable operating modes are:
– Shutdown mode: quiescent current less than 1 ľA (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 flash mode levels

Click for larger imageThis evaluation board is dedicated to the design of a flash LED driver using the STCF02 step-up/down current mode converter, providing 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.

Technical Documentation
Application Note Download
Resources
Gerber Files Download (31-October-2007, 23 KB)
Schematics Download (31-October-2007, 24 KB)
Bill of material Download (31-October-2007, 64 KB)
Key Products
STCF02 
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Application Notes