LED lighting driver is designed with constant current output, no-load protection, isolated output and EMC functions. It is a switching power supply circuit used for LED lighting driver. PWM automatic adjustment is used to achieve constant current output, voltage regulator overvoltage lock is used to achieve no-load protection, and electromagnetic isolation and optical isolation are used to achieve isolated output. After many operations and tests, practice has proved that the circuit has stable constant current output and low heat generation. This design is small in size, and the fine-tuning feedback circuit can be set as a 350mA or 700mA constant current output commonly used for LED drivers. It can be widely used in life lighting and commercial lighting.
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