ZLED7000

40V LED Driver with Internal Switch

Data Sheet

August 12, 2010

© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

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3.4

Output Ripple

the LED if necessary.

Figure 3.1

Output Ripple Reduction

LX

ZLED7000

n LED

L1

D1

GND

ADJ

C1

dynamic resistance of the LED(s). For an increased number of LEDs, using the same capacitor will be more

effective. Lower ripple can be achieved with higher capacitor values, but this will increase start-up delay by

reducing the slope of the LED voltage. The capacitor will not affect operating frequency or efficiency. For a

configuration.