| 摘要 |
A wide range power supply (500) capable of delivering 20V to 5000V is provided. The power supply (500) uses switch mode technology to achieve high overall operating efficiency and is capable of operating from no load to foi l load without loss of regulation. The power supply (500) operates directly fr om the utility supply (502) of 110V/220V and 50Hz/60Hz. The power supply (500) includes an input rectifier stage (505), a buck converter stage (510), a qua si- resonant inverter stage (515), and a voltage multiplier stage (525). The stages are connected in series to achieve the large output voltage range. Hi gh precision is obtained from a use of a digital feedback loop (535 and 550) in connection with an analog feedback loop (555).
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