data brief for further information contact your local stmicroelectronics sales office. october 2011 doc id 018912 rev 1 1/4 4 STEVAL-ILL039V1 step-up current controller for 2 leds based on the stldc08 driver features input voltage: 0.8 v to 3.6 v output : 2 leds at i led = 200 ma dimming mode with external pwm signal rohs compliant description the purpose of the STEVAL-ILL039V1 demonstration board is to provide an example for applications of an led driver using the step-up controller stldc08. the stldc08 is designed for handheld equipment supplied by aa or aaa batteries and provides a precise constant current starting from a variable input voltage source. the led current is set by an external sense resistor inserted between the feedback pin (fb) and gnd. a regulation loop holds the voltage drop at the sense resistor at a constant level (100 mv typ.). STEVAL-ILL039V1 www.st.com
schematic STEVAL-ILL039V1 2/4 doc id 018912 rev 1 1 schematic figure 1. schematic ! - v
STEVAL-ILL039V1 revision history doc id 018912 rev 1 3/4 2 revision history table 1. document revision history date revision changes 31-oct-2011 1 initial release.
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