PFC Switching Power Supply Design

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I’ll implement the custom SR footprint behavior in-place by converting Q3/QSR1 to use the large exposed drain pad as the single routable drain connection, removing the problematic split drain pad routes, then rerouting and checking DRC.

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Implemented the custom Q3/QSR1 drain treatment and rerouted the affected SR nets.
What changed:
  • Disabled the small duplicate drain pads D_1–D_4 on Q3 and QSR1.
  • Left the large exposed drain pad D_5 active as the single merged drain region.
  • Deleted and rerouted affected SR nets.
  • Re-ran DRC and router preflight.
Result:
  • Q3/QSR1 no longer appear in router preflight warnings.
  • The original Q3/QSR1 multi-drain footprint issue is resolved.
  • Remaining DRC is reduced but not fully clean: 3 airwire trace artifacts, 3 dangling-trace warnings, and 7 overlapping-copper errors remain, now mostly outside the Q3/QSR1 merged-drain issue.
Updated: Q3/QSR1 Routing and Creepage Review
Next best step: clean the remaining non-SR trace/via overlap artifacts, then rerun full DRC and final creepage review.
Clean DRC and review
Fix remaining artifacts
Run final creepage
Check power routing
Update routing notes
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400Hz Isolated PFC Power Supply thumbnail
Isolated 120–230 VAC 400 Hz PFC supply producing 12 VDC at 10 A and 5 VDC at 5 A from a shared secondary ground.

Properties

VAC

Pricing & Availability

Distributor

Qty 1

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$25.95–$37.85

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$24.98–$25.24

HQonline

$1.31–$1.45

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$33.05–$33.94

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$79.14–$228.45

TME

$14.38

Verical

$30.63–$177.69

Controls