Applications with Voltage Regulator  L200

   ��� �������� ��� ����������� ��� ������������� �� ������������ L200, ��� �������� ����� ��� ��������, ��� �������� SGS-THOMSON, � ����� ����� ���� �� ���������. ��� ������� Fig.1, �������� �� ���������� ��� ���� ������ �� �� RV1, ��� ��� Fig.2, �������� �� ���������� ��� ��� ���� � ����� ������, �� �� TR2 ��� TR1, ���������� ������������ ����������� ��� �� �������������� ��� �������������, �������� �� ����� ���� �������� datasheets. ������� �� ���������� ��� ������ ���� ������� ���������.

   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.

L200_a.gif (8122 bytes)

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.

Sam Electronic Circuits 3/02