Digital controlled adjustable integrated regulated power supply circuit diagram

Published:2011/5/10 22:18:00 Author:Rebekka | Keyword: Digital controlled, adjustable integrated regulated power supply | From:SeekIC

Here is the diagram of digital controlled adjustable integrated regulated power supply circuit composed of CW117, CW217 and CW317. The figure shows the digital control adjustable integrated regulated power supply. Digital control input is 8-bit binary code. Reasonable choice for the resistance resistance R0 ~ R8 can get the CNC adjustable integrated regulated power supply that its output voltage is 2.5 ~ 120V and stepping value is 0.5V. The precision requirement of resistance R0 ~ R8 is high. The requirement of the high binary code resistance is highest. Such as when the accuracy of R0 and R8 is ± 0.1%, the output precision of 120V high-voltage is about 0.5V. When the 8-bit binary code is 00000000 , the transistor VT1 ~ VT8 all stop, the output voltage is maximum. When the 8-bit binary code shows 11111111 , the transistor VTl ~ VT8 are all turned on, R0 ~ R8 9 resistors in parallel is equivalent to the resistance R2 of the standard circuit, then the output voltage is the lowest. Adjust the output voltage to make the input and output voltage of the integrated regulator is less than the allowed value(40V).



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