小功率数字显示可调稳压电源的设计

Design of Adjustable Regulated Power Supply with Digital Display

小功率线性稳压电源是电子系统测试中广泛应用的电子设备,目前小功率电源多为固定电压输出或电压可调却无直观数字显示,操作使用不便。针对电源电压的连续可调与数字显示功能的需求,设计了一种基于LM317的可调数显小功率稳压电源,完成了稳压电源的设计和调试,实现1.25~15 V的输出电压连续可调,输出电流达到1.25 A,电压调整精度达到0.25级,具有输出精度高、易于调整和显示直观等特点。

The low power linear regulated power supply is an electronic equipment widely applied to electronic system test, at present, small power supply is usually with fixed voltage or with adjustable voltage but without digital display, moreover, it is inconvenient to operate or use. Aiming at the requirements of continuous adjustment and digital display function of power supply output, a linear regulated power supply based on LM317 with adjustable output and digital display is designed, and the design and debugging process of the small regulated power supply are implemented, which can realize continuous adjustable output within the range from 1.25 V to 15 V and current output with 1.25 A, the voltage output accuracy meets 0.25 level standard, the power supply has the characteristics such as high output precision, easy to adjust and direct display.