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User's Guide
SLUU280B–May 2007–Revised July 2008
UCC28060EVM 300-W Interleaved PFC Pre-Regulator
The UCC28060 is a dual-phase, transition-mode Power Factor Correction (PFC) pre-regulator. The
UCC28060EVM is an evaluation module (EVM) with a 390-V, 300-W, dc output that operates from a
universal input of 85 V to 265 V and provides power-factor correction.
RMS RMS
Throughout this document, the acronym EVM and the phrases evaluation board and evaluation module
are synonymous with the UCC28060EVM.
1
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Schematics www.ti.com 4 Schematics Figure 1 and Figure 2 show the schematics for this EVM. See the List of Materials for specific values. To evaluate inductor ripple currents, Jumpers JP8 and JP9 can be removed and replaced with current loops. Figure 1. Interleaved PFC Power Stage 2 UCC28060EVM 300-W Interleaved PFC Pre-Regulator SLUU280B–May 2007–Revised July 2008 Submit Documentation Feedback + +
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www.ti.com Schematics + Figure 2. Controller Circuitry SLUU280B–May 2007–Revised July 2008 UCC28060EVM 300-W Interleaved PFC Pre-Regulator 3 Submit Documentation Feedback
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Test Setup and Power-Up/Power-Down Instructions www.ti.com 5 Test Setup and Power-Up/Power-Down Instructions WARNING There are high voltages present on the pre-regulator. It should only be handled by experienced power supply professionals. To evaluate this board as safely as possible, the following test configuration should be used: • Connect an isolation transformer between the source and unit • Attach a voltmeter and a resistive or electronic load to the unit output before supplying power to t
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www.ti.com Typical Performance Data 6 Typical Performance Data Figure 4 through Figure 7 present characteristic performance data for the UCC28060EVM. Efficiency 100.0% 99.0% 98.0% 97.0% 96.0% Efficencyat Vin 85V RMS 95.0% Efficencyat Vin =265V RMS 94.0% 93.0% 92.0% 91.0% 90.0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% %Output Power Figure 4. Efficiency at 85V and 265V RMS RMS The UCC28060 control device has phase management capability to improve light load efficiency. To demonstrate the light loa
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Typical Performance Data www.ti.com EfficiencyatVin = 230V RMS 99.0% 97.0% 95.0% 93.0% 91.0% 89.0% With Phase Management 87.0% Without Phase Management 85.0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% %OutputPower Figure 6. Efficiency at 230 V , With and Without Phase Management RMS 1.40706 V = 230V IN RMS 1.17256 0.93805 0.70354 0.46904 0.23453 0.00002 0 6 12 18 24 30 36 42 48 Harmonic No. Figure 7. Current Harmonics 6 UCC28060EVM 300-W Interleaved PFC Pre-Regulator SLUU280B–May 2007–Revised July
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www.ti.com Typical Performance Data 6.1 Output Ripple Voltage at Full Load Figure 8 illustrates the output ripple voltage. Figure 8. V Ripple, P = 300 W OUT OUT 6.2 Input Ripple Current Cancellation Figure 9 through Figure 14 show the input current (M = I + I ), Inductor Ripple Current (I , I ) versus 1 L1 L2 L1 L2 rectified line voltage. From these graphs, it can be observed that interleaving reduces the magnitude of input ripple current caused by the inductor ripple current. Figure 9. Inductor
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Typical Performance Data www.ti.com Figure 11. Inductor and Input Ripple Current Figure 12. Inductor and Input Ripple Current at 265 V Input at Peak Line Voltage at 265 V Input at Half Peak Line Voltage RMS RMS Figure 13. Inductor and Input Ripple Current Figure 14. Inductor and Input Ripple Current at V = 85 V , P = 300 W at V = 265 V , P = 350 W IN RMS OUT IN RMS OUT 8 UCC28060EVM 300-W Interleaved PFC Pre-Regulator SLUU280B–May 2007–Revised July 2008 Submit Documentation Feedback
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www.ti.com Typical Performance Data 6.3 Startup Characteristics Figure 15 and Figure 16 illustrate the UCC28060EVM startup characteristics. Figure 15. Start-Up at V = 85 V , P = Figure 16. Start-Up at V = 265 V , P = 0 IN RMS OUT IN RMS OUT 350 W W 6.4 Brownout Protection The UCC28060 has a brownout protection that shuts down both gate drives (GDA and GDB) when the VINAC pin detects that the RMS input voltage is too low. This EVM was designed to go into a brownout state when the line drops below
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Typical Performance Data www.ti.com 6.5 Line Transient A line transient test was conducted with an ac source on the reference design. The line was varied from 230 V to 115 V to 230 V and the transient response was evaluated in each case. From the RMS RMS RMS oscilloscope image in Figure 19, it can be observed that the output recovered from line transients within 300ms at full load. Figure 19. Line Transient, P = 300W OUT 10 UCC28060EVM 300-W Interleaved PFC Pre-Regulator SLUU280B–May 2007–Revise
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www.ti.com Reference Design Assembly Drawing 7 Reference Design Assembly Drawing Figure 20 and Figure 22 show the top and bottom layers (respectively) of the UCC28060EVM. Note: Board layouts are not to scale. These figures are intended to show how the board is laid out; they are not intended to be used for manufacturing UCC28060EVM PCBs. Output390V MaximumLoad 0.77A C2 C3 13 Figure 20. Top Layer Assembly Figure 21. Bottom Layer Copper SLUU280B–May 2007–Revised July 2008 UCC28060EVM 300-W Interle
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List of Materials www.ti.com Output390V MaximumLoad0.77A JP9 JP8 D2 13 Figure 22. Bottom Layer Assembly 8 List of Materials Table 2 lists the EVM components as configured according to the schematics (see Section 4). Table 2. List of Materials Qty RefDes Value Description Size Part Number MFR 4 AC_LINE, 3267 Connector, Banana Jack, Uninsulated 0.500 dia. inch 3267 Pomona AC_NEUTRAL, VOUT, RETURN 1 C1 0.047μF Capacitor, Polyester, 630V, 10% 0.256in × 0.650in ECQ-E6473KZ Panasonic 1 C11 220nF Capac
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www.ti.com List of Materials Table 2. List of Materials (continued) Qty RefDes Value Description Size Part Number MFR 1 JP1 923345-20-C Jumper, 1.600 inch length, PVC Insulation, 0.035in dia. Cut to Dimension 3M AWG 22 3 JP2, JP4, JP5 923345-20-C Jumper, 2.000 inch length, PVC Insulation, 0.035in dia. 923345-20-C 3M AWG 22 1 JP3 923345-06-C Jumper, 0.600 inch length, PVC Insulation, 0.035in dia. 923345-06-C 3M AWG 22 1 JP6 923345-05-C Jumper, 0.500 inch length, PVC Insulation, 0.035in dia. 92334
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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. As such, the goods being provided are not intended to be
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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. All products are sold subject to TI’s terms and conditions of sale supplied at the t
