Here they exist two regulator circuits, that use the IC L200, as regulator of voltage and current, the company SGS-Thomson, which give these circuits. In circuit Fig.1, we CAN regulate the output voltage, with the RV1, while in the Fig.2, we can regulate also output voltage – current, with the TR2 and TR1, respectively. More information on characteristics for L200, you can see in list datasheets. Shortly will be added also certain other useful circuits with L200.
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Fig. 1-High current regulator with NPN pass transistor |
| R1=0.7 / Io max |
C4=47uF 63V |
| R2=10 ohms |
RV1=4.7Kohm pot. |
| R3=1Kohm |
Q1=BDW51 |
| R4=820 ohms |
Q2=BC108 |
| C1=4700uF 63V |
IC1=L200 |
| C2-3=100nF 100V |
| |
|
Fig. 2-Programmable voltage and current regulator |
| R1=1Kohm |
C1=4700uF 63V |
| R2=470 ohm |
C2=220nF 100V |
| R3=0.1 ohm 5W |
IC1=L200 |
| R4=1Kohm |
IC2=LM741 |
| TR1=100Kohm pot. |
|
| TR2=10Kohm pot. | |
