| 摘要 |
<p>A direct-current isolation buck convertor and a bus voltage detection circuit thereof. The detection circuit achieves the detection of the bus voltage of a direct-current isolation buck convertor by detecting the secondary side voltage of an isolation transformer, so that the isolation of a high voltage and a low voltage can be achieved without an extra isolation chip. The circuit is simple, and the cost is low. The detection circuit can also only extract the peak point voltage of a PWM waveform signal via a hardware circuit as an analogue signal, such that the bus voltage of the high-voltage side of the direct-current isolation buck convertor can be detected via a digital control circuit, and the bus voltage of the high-voltage side of the direct-current isolation buck convertor can be detected via an analogue control circuit as well.</p> |
