Characteristics power supply
Voltage output: 0 ... 30 V.
Output current: 4 A
The power unit is assembled according to the traditional scheme, a bit unusual inclusion of the chip. Due to this inclusion was able to obtain a lower limit of the output voltage of 30 mV., what the indicator will be reflected as 0V.
The transistor VT 2 it is desirable to use a compound. Resistor R 10 is regulated by the upper limit of the output voltage. Node protection is built on transistors of different patterns and represent the equivalent of a thyristor. Resistor R 1 regulate the protection threshold current. In some cases, the resistor R is chosen 4.
Resistor R 4 - 5 watt 0.22 Ohms. Node protection works on both short-circuit and overcurrent. Resistor R 8 is used with the dependence of A.
The power transformer, power from 100 watts and above, with the voltage on the secondary winding of not lower than 27 V and a current capacity of 5-6 A.
The printed circuit Board 90 x 62 mm.
Analogues of IC LM 723 no.
Scheme of paspolozheniya elements for the power supply
Printed circuit Board power supply unit
Author: A. Patrin G. Kirsanov Tambov region, This email address is being protected from spambots. You must have JavaScript enabled to view it. ; Publication: www.cxem.net