A low-emi piecewise linear constant current led drive circuit

The present invention discloses a piecewise linear constant current LED driver circuit for low EMI, which comprises a rectifier circuit and LED strings, a first rectifier circuit connected to the output terminal of the input module and the detection wires LED strings, the input detection module EMI wire connection control module, a reference voltage conductor connected to the module the module, the EMI, the EMI module output terminal connected to the constant current controller module wire, LED light string connected to the negative terminal of the constant current controller module wire; solves the prior art piecewise linear constant current LED driver circuit during full-wave rectified input voltage changes periodically, since the voltage and current process segment mutations were present at the beginning of each, there is the obvious EMI driving circuit, seriously affecting the service life of LED lights and other issues.