Texas Instruments UCC28610EVM-474 User Manual
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Texas Instruments UCC28610EVM-474 User Manual

25-w universal off-line flyback converter
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Using the UCC28610EVM-474
User's Guide
Literature Number: SLUU383B
November 2009 – Revised May 2011

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Summary of Contents for Texas Instruments UCC28610EVM-474

  • Page 1 Using the UCC28610EVM-474 User's Guide Literature Number: SLUU383B November 2009 – Revised May 2011...
  • Page 2 Converter Introduction The UCC28610EVM-474 evaluation module is a 25-W off-line Discontinuous Mode (DCM) flyback converter providing 12 V at 2.1-A maximum load current, operating from a universal AC input. The module is controlled with the UCC28610 Green-Mode Flyback Controller which uses a cascoded architecture that allows fully integrated current control without an external sense resistor.
  • Page 3 EVM can be handled. Serious injury can occur if proper safety precautions are not followed. SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 4: Electrical Performance Specifications

    Electrical Performance Specifications www.ti.com Electrical Performance Specifications Table 1. UCC28610EVM-474 Electrical Performance Specifications PARAMETER CONDITIONS UNITS INPUT CHARACTERISTICS Input voltage VRMS Input current = 115 V = max = 115 V = 0 A 0.03 Brown out = max UVLO...
  • Page 5 Figure EXAS NSTRUMENTS Figure 1. Placement of Revision Code for the Evaluation Module. SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 6 Schematic/Revision Code Placement www.ti.com Figure 2. UCC28610EVM-474 Schematic SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 7: Circuit Description

    U2. Using an opto with a low CTR provides better noise immunity. Resistor R13 is used as an injection point for small signal frequency response testing. SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 8: Evm Test Set Up

    Figure 3 shows the basic test set up recommended to evaluate the UCC28610EVM-474 with a load. WARNING High voltages that may cause injury exist on this evaluation module (EVM).

  • Page 9: Power Meter

    Recommended Test Set Up for Operation Without a Load DMM V AC SOURCE Neutral Line EXAS NSTRUMENTS POWER METER Oscilloscope Figure 3. UCC28610EVM-474 Recommended Test Set Up Without a Load Recommended Test Set Up for Operation With a Load DMM V AC SOURCE Neutral Line EXAS NSTRUMENTS ELECTRONIC...

  • Page 10: List Of Test Points

    Positive output terminal of the EVM to the load J2-2 -Vout Return connection of the EVM output to the load SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 11: Test Procedure

    4. Make sure the input power is off and the bulk capacitor and output capacitors are completely discharged before handling the EVM. SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 12: Output Voltage Ripple

    1. Ensure the load is at maximum; this will quickly discharge the output capacitors. 2. Turn off the AC source. SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 13: Performance Data And Typical Characteristic Curves

    Performance Data and Typical Characteristic Curves www.ti.com Performance Data and Typical Characteristic Curves Figure 6 through Figure 23 present typical performance curves for the UCC28610EVM-474. EFFICIENCY vs. LOAD CURRENT 0.870 0.860 0.850 85VAC 0.840 115VAC 230VAC 0.830 264VAC 0.820 0.810 0.800...
  • Page 14 FB CURRENT vs. SWITCHING FREQUENCY 85Vac 115Vac 230Vac 265Vac IFB (uA) Figure 9. Switching Frequency as a Function of FB Current SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 15 , full load. Ch.1 = bulk input voltage, 100 V/div., Ch.2 = VGG, 10 V/div., Ch.3 = VDD, 10V/div., Ch.4 = DRV, 10V/div.) SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 16 = 1.1 A, Ch.2 = Drain of HV MOSFET, 100 V/div., Ch.3 = ZCD, 5 V/div., Ch. 4 = VDD, 10 V/div.) SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 17 Figure 15. Ripple on VGG and VDD During Green Mode Operation (Ch.3 = VGG, AC coupled, 2 V/div., Ch.4 = VDD, AC coupled, 200 mV/div.) SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 18 Figure 17. Output Voltage Ripple During Frequency Modulation Mode (Input voltage = 85 V , full load. Ch.2 = V , AC coupled, 20 mV/div.) SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 19 750-ms t . Ch.1 = I , Ch.3 = VDD, 10 V/div., Ch.4 = VGG, 10 V/div.) RETRY SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 20 (The EVM was tested with an open FB loop, no load. OVP threshold is equal to 15.44 V. Ch. 3 = V V/div., offset by 4 V.) SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 21 10000 Frequency (Hz) Gain Phase Figure 23. Bode Plot (Input voltage = 230 V , full load.) SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 22 EVM Assembly Drawing and Layout Figure 24 through Figure 26 show the design of the UCC28610EVM-474 printed circuit board. EXAS NSTRUMENTS Figure 24. Top Layer Component Placement SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright ©...
  • Page 23 Figure 25. Bottom Layer Routing Figure 28. Bottom Layer Component Placement. Figure 26. Bottom Layer Component Placement SLUU383B – November 2009 – Revised May 2011 UCC28610EVM-474 25-W Universal Off-Line Flyback Converter Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...

  • Page 24: List Of Materials

    List of Materials www.ti.com List of Materials Table 3. List of Materials for UCC28610EVM-474 COUNT REF DES DESCRIPTION PART NUMBER Capacitor, film, 0.33 µF, 275 VAC, X2, ±20%, 0.690 x C1, C6 ECQ-U2A334ML Panasonic 0.374 inch Capacitor, ceramic, 100 pF, 50 V, NP0, ±5%, 0603 Capacitor, ceramic, not populated, 50 V, NP0, ±5%,...
  • Page 25 References www.ti.com Table 3. List of Materials for UCC28610EVM-474 (continued) COUNT REF DES DESCRIPTION PART NUMBER Resistor, chip, 100 kΩ, 1/10 W, ±1%, 0603 Resistor, chip, 20.5 kΩ, 1/10 W, ±1%, 0603 Resistor, chip, 51.1 kΩ, 1/10 W, ±1%, 0603 Resistor, chip, 64.9 kΩ, 1/10 W, ±1%, 0603...
  • Page 26 Appendix A UCC28610EVM-474 Rev. A The following schematic, board layout, and list of materials apply to the UCC28610EVM-474 Rev. A version of the evaluation module. The Rev. A version of the EVM includes differential mode inductors L2 and L3. Subsequent revisions of the EVM replaced these inductors with a short circuit.
  • Page 27 UCC28610EVM-474 Rev. A www.ti.com Figure 28. Top Side View of UCC28610EVM-474 Rev. A EXAS NSTRUMENTS Figure 29. Top Layer Component Placement for UCC28610EVM-474 Rev. A SLUU383B – November 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 28 UCC28610EVM-474 Rev. A www.ti.com Figure 30. Bottom Layer Routing of UCC28610EVM-474 Rev. A Figure 31. Bottom Layer Component Placement of UCC28610EVM-474 Rev. A SLUU383B – November 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated...
  • Page 29 UCC28610EVM-474 Rev. A www.ti.com Table 4. Table 4. List of Materials for UCC28610EVM-474 Rev. A COUNT REF DES DESCRIPTION PART NUMBER Capacitor, film, 0.33 µF, 275VAC, X2, ±20%, 0.690 x C1, C6 ECQ-U2A334ML Panasonic 0.374 inch Capacitor, ceramic, 100 pF, 50 V, NP0, ±5%, 0603 Capacitor, ceramic, not populated, 50 V, NP0, ±5%, 0603...
  • Page 30 UCC28610EVM-474 Rev. A www.ti.com Table 4. Table 4. List of Materials for UCC28610EVM-474 Rev. A (continued) COUNT REF DES DESCRIPTION PART NUMBER Resistor, chip, 100 kΩ, 1/10 W, ±1%, 0603 Resistor, chip, 20.5 kΩ, 1/10 W, ±1%, 0603 Resistor, chip, 51.1 kΩ, 1/10 W, ±1%, 0603 Resistor, chip, 64.9 kΩ, 1/10 W, ±1%, 0603...
  • Page 31 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.

  • Page 32: Important Notice

    IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.

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