Simple PWM Modulator Allows DC Control Signal To Drive LEDs

Focus:

Dimming LEDs with a pulse-width modulated control signal enables more-efficient LED operation at higher current levels. A dual comparator plus a few passive components forms a circuit that converts a 0- to 5-Vdc control signal to a 500-Hz PWM signal with 100% adjustable duty cycle.

What you’ll learn:

• How to build a simple circuit for PWM dimming of LEDs

Notes:

ED's Ideas For Design

View the Source

Author & Publication:

Ahmad Ayar, associate member of the technical staff, Maxim Integrated Products Inc., Sunnyvale, Calif., Electronic Design, Sep 28 2008

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