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24VAC/24VDC to 12VDC Converter Circuit for Dual Input Power Supply

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Best answers LABEL_AI_GENERATED

How can I convert either 24 VAC or 24 VDC into a 12 VDC output with one circuit?

Use a rectifier and filter stage in front of a DC-to-DC converter so the converter always sees DC, whether the input is 24 VAC or 24 VDC [#21661230] A single rectifier or a bridge rectifier can be used, depending on load current, ripple frequency, and how much ripple the converter can tolerate [#21661232] The filter can be as simple as a capacitor or as elaborate as an LC pi filter for better smoothing [#21661232] With this arrangement, AC is converted to DC and DC is passed through to the converter input in the same form [#21661230]
AI summary based on the discussion. May contain errors.
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  • #1 21661228
    Gundappa Patil
    Anonymous  
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  • #2 21661229
    Gundappa Patil
    Anonymous  
  • #3 21661230
    Steve Lawson
    Anonymous  
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  • #4 21661231
    Steve Lawson
    Anonymous  
  • #5 21661232
    Steve Lawson
    Anonymous  
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  • #6 21661233
    Mark Harrington
    Anonymous  
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  • #7 21661234
    Gundappa Patil
    Anonymous  
  • #8 21661235
    Gundappa Patil
    Anonymous  
  • Request for an attempted block diagram before help

    #9 21661236
    Mark Harrington
    Anonymous  
  • Decline in UK electronics retail expertise

    #10 21661237
    Mark Harrington
    Anonymous  
  • #11 21661238
    StrykerTECH
    Anonymous  

Topic summary

LABEL_AI_GENERATED
The discussion addresses the design of a converter circuit capable of accepting either 24VAC or 24VDC input and providing a stable 12VDC output. The key approach involves using a rectifier—either a single diode or a bridge rectifier—to convert AC input to DC, while DC input passes through unchanged. Following rectification, a filtering stage, typically a capacitor or an LC pi filter, smooths the output to reduce ripple, ensuring a stable DC voltage suitable for the DC-to-DC converter stage. The choice of rectifier and filter components depends on load current, ripple frequency, and the input voltage tolerance of the DC-to-DC converter. The final stage is a DC-to-DC converter that regulates the voltage down to 12VDC at the desired current rating. A referenced example circuit reportedly delivers 12V at 2A from either 24VAC or 24VDC input. The discussion emphasizes understanding the working principle rather than just copying circuits, encouraging learning about rectification, filtering, and voltage regulation.
AI summary based on the discussion. May contain errors.
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