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Rangkaian Regulator menggunakan Op-Amp

Regulator using Op-Amp
Skema rangkaian regulator menggunakan OP-Amp

Regulator is a series of regulations or the voltage output from power so that a portion darinaik effects or voltage drop in net does not affect the voltage ration power to be so stable.

Regular circuit of regulators have been good if the ripple voltage is small, but there is a problem of stability. If the voltage PLN rise /down, then the output voltage is also will be rise /donw. regular circuit of regulators, if the current of the larger, the dc voltage output is also down. For some applications this voltage change will very disrupt.

Rangkaian Regulator menggunakan Op-Amp


Technical regulations that better is to use the Op-Amp for a drive-transistor Q. Dioda zener here do not give directly to the bait transistor Q, but as a reference voltage for the Op-Amp IC1. Feedback on the negative pin Op-amp is a snippet from the voltage regulator out, namely:
Regulator using Op-AmpIf the voltage V out exit Ascending, voltage V in (-) also Ascending until this voltage is the same as the reference voltage Vz. Likewise if the voltage V out decreases exit, for example because of supply current to the load increases, Op-amp will maintain stability in the V reference point z with the current IB to the transistor Q1 so that at any time in the Op-amp maintain stability:
Regulator using Op-Amp
Ignore the VBE voltage transistor Q1 and mensubsitusi formula, obtained by mathematical relationships
Regulator using Op-Amp
In the circuit of regulator Op-Amp of this output voltage can be adjusted with the set of R1 and R2.
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