Title :
Design and realization of high-precision digital control direct current power supply
Author :
Jing, Haixia ; Liu, Zhengguo ; Wang, Haiyan ; Shen, Xiaohong
Author_Institution :
Sch. of Marine Eng., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
A high-precision digital control DC power supply based on singlechip STC89C52, A/D converter AD7705, D/A converter DAC7512 and three terminal adjustable regulator LM317 is designed and realized, which uses MCU as the center, and adopts 12 DAC DA7512 to realize digital control and 16 ADC AD7705 and LCD to the measurement and display of output voltage. The voltage adjustment range of this system is 0-13V, and the deviation of display value and set value is not more than 1%, voltage step value is 0.01 V. The experimental result shows that the system can well solve the accuracy of output adjustable voltage, and is characterized by high precision, easy to use and simple circuit.
Keywords :
analogue-digital conversion; digital control; digital-analogue conversion; microcontrollers; power control; power supplies to apparatus; voltage control; AD7705 analogue-digital converter; DAC7512 digital-analogue converter; LM317 adjustable regulator; STC89C52 singlechip; direct current power supply; high-precision digital control; microcontroller unit; voltage 0 V to 13 V; voltage 0.01 V; voltage adjustment range; Accuracy; Digital control; Digital signal processing; Microcomputers; Power supplies; Voltage control; Voltage measurement; AD7705; DAC7512; DC power supply; digital control powe; voltage regulation;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5768894
