Automatic identification voltage regulating circuit

The utility model discloses an automatic identification voltage regulating circuit, which is used for automatically regulating voltage and enabling a V + output end and a V-output end to output different voltage values, and comprises a DC line adapter, a control IC, an adjustable voltage stabilizing IC, an identification resistor, a current limiting resistor, a shunt resistor, a first divider resistor, a second divider resistor, a first capacitor and a second capacitor. According to the utility model, the resistance value of the identification resistor is changed through the control IC, so that the voltage stabilization value of the adjustable voltage stabilization IC adjusts the output voltage of V + and V-, the multi-voltage output of the power adapter is realized, the compatibility is strong, and the cost is low. 本实用新型公开了一种自动识别调压电路，用于自动调整电压，使V+和V-输出端输出不同的电压值，包括DC线转接头、控制IC、可调节稳压IC、识别电阻、限流电阻、分流电阻、第一分压电阻、第二分压电阻、第一电容、以及第二电容。本实用新型通过控制IC改变识别电阻的阻值，进而使可调节稳压IC的稳压值调节V+和V-的输出电压，做到电源适配器多电压输出，兼容性强，成本低。