EL7513 led driver circuit design

Posted on Feb 6, 2014

A very simple white led driver schematic circuit can be designed using the EL7513 constant current boost regulator specially designed for driving white LEDs. It can drive 4 LEDs in series or up to 12 LEDs in parallel or series configuration and achieves efficiency up to 91%. with frequency less than 200Hz (for C3 = 4700pF). When a higher frequency

EL7513 led driver circuit design
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PWM is used, an RC filter is recommended before the CNTL pin. When the level falls below 0. 1V, the chip goes into shut-down mode and consumes less than 1 A of supply current for VIN less than 5. 5V. As you can see this circuit diagram led driver is designed for maximum efficiency, and drives 3 legs of 4 LEDs in a series configuration. The input voltage required for this led driver application circuit must be around 2. 7 and 4. 2 volt, typically 3. 3 volt.

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