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Simple Bootstraps Startup Circuit Diagram

2015-01-08 21:25  
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Asimple bootstrap startup circuit diagramis schemed in the following picture. Bootstrap circuit is useful in a high-voltage gate driver.

simple bootstrap circuit design

A circuit comprised of startup resistor, startup resistor, startup diode, and Zener diode may solve the problem of delivering initial charge to the bootstrap capacitor if it assumed there was enough voltage differential between input voltage and output voltage.

(source: fairchildsemi.com).