100/200Vac Input, 30W Isolated Power Supply Reference Design for Servo Drives
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Key Document


This reference design provides isolated 24Vdc, 16Vdc (x3) and 6V outputs to power the control electronics, IGBT module and fan for 100Vac/200Vac input servo drives. The power supply can be either powered directly from a single or 3- phase AC mains or can be powered from the DC link voltage. This reference design uses primary-side regulation, quasi-resonant flyback topology and is rated for 30W output. The line and load regulation of the power supply is designed to be within 5%. The power supply is designed to meet the clearance, creepage and isolation test voltages as per IEC61800-5 requirements

  • 30W isolated main power supply for servo drives
  • Can operate with DC Link (450Vdc max) or AC input (200VAC)
  • Load and line Regulation: 5%
  • Input UV/OV, Output overload & SC protection
  • Protection against loss of feedback
  • Lower system cost solution using UCC28711 through primary side regulation, eliminating feedback loop
  • Quasi-Resonant mode controller improves EMI
  • Operating temp range: -10ºC to 65ºC
  • Designed to comply with IEC 61800-5

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMS33460  Ultra-low power, space-saving 3-V undervoltage detector  Power management  Sample & Buy Not Available
TPS54332  3.5V to 28V Input, 3.5A, 1MHz Step-Down Converter with Eco-mode  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
UCC28711  Constant-voltage, constant-current PWM with PSR, valley switching, NTC option, and 0-mV cable comp.  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMS33460 Download Download
TPS54332 Download Download
UCC28711 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 2276 15 Oct 2015
Design files (6)
Title Type Size (KB) Date
PDF 242 30 Nov 2015
ZIP 1505 25 Aug 2015
PDF 1168 25 Aug 2015
ZIP 438 25 Aug 2015
ZIP 147 25 Aug 2015
PDF 523 25 Aug 2015
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Reference Designs (2)

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