Hi,
I want to design a power supply with these specs for metering purposes:
Input voltage = 100-600VAC three phase (RMS line to line)
Output voltage = 48V and 3.3V/200mA
I'm looking into two approaches:A cap dropper and a flyback SMPS. Flyback has higher efficiency at the expense of higher cost and complexity. Cap dropper is kind of a cheaper option but capacitors at this high voltage are also expensive.
I'd appreciate any suggestions on trade-offs.
EDIT: Transformerless power supplies are no a permitted topic. So I will go for Isolated Flyback.
New question: For this high voltage, 600VAC or ~900VDC full rectified, what would the impact be in the transformer design in terms of cost and size?
I want to design a power supply with these specs for metering purposes:
Input voltage = 100-600VAC three phase (RMS line to line)
Output voltage = 48V and 3.3V/200mA
I'm looking into two approaches:
I'd appreciate any suggestions on trade-offs.
EDIT: Transformerless power supplies are no a permitted topic. So I will go for Isolated Flyback.
New question: For this high voltage, 600VAC or ~900VDC full rectified, what would the impact be in the transformer design in terms of cost and size?
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