Non-isolated switching power supply circuit for super wide voltage input
A switching power supply circuit, ultra-wide voltage technology, applied in the output power conversion device, the conversion of DC power input to DC power output, the conversion of AC power input to DC power output, etc. problem, to achieve the effect of improving the input voltage range
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[0018] Such as figure 1 As shown, the non-isolated switching power supply circuit with ultra-wide voltage input includes: rectification and filtering circuit 01, MOS tube voltage divider circuit 02, buck step-down circuit 03 and regulated output circuit 04. The present invention is characterized in that the AC input voltage is passed through the rectification and filtering circuit 01 to obtain the DC bus voltage, and the DC bus voltage flows through the MOS tube voltage divider circuit 02, and the MOS tube voltage divider circuit 02 controls the bus voltage according to changes in the circuit design parameters and the application environment. Voltage division, the buck step-down circuit 03 performs step-down processing on the output of the MOS transistor voltage divider circuit 02, and the voltage-stabilizing output circuit 04 performs secondary voltage stabilization and filtering on the output of the buck step-down circuit 03 to output.
[0019] Such as figure 2 As shown, t...
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