The 3-terminal voltage stabilizer circuit

Published:2011/7/24 7:49:00 Author:Seven | Keyword: 3-terminal, voltage stabilizer | From:SeekIC

In the figure, resistor R1 provides bias current for the 3-terminal voltage stabilizer, and the need of R1<Veb2/Ib(max) must be met, if R1 is too high, the need in the above formula can't be met, the 3-terminal bias current is provided by base electricity of triode Tr2, and the output voltage is out of control.In figure 1, the output current of 0~5V is almost provided by Tr2, the power of Tr2 is large, so a radiator is needed. A regulator diode can also form a simple regulator circuit, but the output current is only 10mA or so.



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