En la figura presentamos un circuito extremadamente simple de una fuente de tensión regulada por un diodo Zener. Dependiendo del transistor utilizado, podemos obtener corrientes de hasta unos pocos amperios de salida. Observamos que el diodo Zener debe tener una tensión de 0.6 V más que la tensión deseada en la salida, ya que hay una caída de tensión de ese orden en la unión base-emisor del transistor. La potencia disipada por el transistor, que debe montarse en un buen radiador de calor, vendrá dada por el producto de la diferencia entre la tensión de entrada y salida, por la corriente drenada por la carga. La disipación del diodo Zener depende de la ganancia del transistor, y la corriente en ese componente debe determinarse y multiplicarse por su tensión. Las aplicaciones típicas de esta fuente de alimentación son para alimentar pequeños dispositivos de baja tensión (entre 3 y 12 V) que requieren corrientes de hasta aproximadamente 1 A.

 

Fuente transistorizada regulada por Zener
Fuente transistorizada regulada por Zener

 

 

 

18.837MBMemory Usage39.63msRequest Duration
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PHP Version8.3.20
Identityguest
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Templatecassiopeia
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