Zero-volt adjustment start circuit of the W317 voltage stabilizer

Published:2011/7/5 19:37:00 Author:Christina | Keyword: Zero-volt, adjustment, start circuit, voltage stabilizer | From:SeekIC

If we use the W317 to make the voltage stabilizer, because the limit of the constitution of the internal circuit, the minimum output voltage is 1.25V. The circuit in the figure can make the voltage to be adjusted from 0V. The difference of this circuit and the W317 basic application circuit is a group of negative voltage auxiliary power supply. The regulator tube DW positive electrode's voltage to earth is -1.25V, the bottom of the voltage regulating potentiometer W is not connected with the ground but is connected with the positive electrode of the voltage regulating tube, the output voltage of the voltage stabilization power supply is also from the position between the output port and the ground of the three terminal regulator.



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