QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1315
DUAL STEP-DOWN 1.5A LED DRIVER
3
maximum LED output voltage is 23V as defined by
the external clamp voltage. This limits the number
of LEDs in series on the output and sets the open
LED maximum output voltage.
Please note the zener diode in the boost path. The
9V zener diode reduces the boost voltage by 9V
from the LED (output) voltage. A minimum of 3V is
required on the boost voltage capacitor for proper
operation. Please consult the datasheet for details
regarding the boost circuit in relation to the input
voltage, output voltage, thermals, and maximum
ratings.
