Using the UCC29910A-730 User's Guide Literature Number: SLUU505A May 2011 – Revised October 2011
User's Guide SLUU505A – May 2011 – Revised October 2011 Buck PFC Pre-Regulator in Power Factor Correction Applications 1 Introduction This EVM is to help evaluating UCC29910A buck PFC pre-regulator controller device in Power Factor Correction (PFC) applications especially targeting notebook computer charger area with universal AC input voltages.
Electrical Performance Specifications www.ti.com 3 Electrical Performance Specifications Table 1. UCC29910AEVM-730 Electrical Performance Specifications PARAMETER CONDITION MIN TYP MAX UNITS Input Characterstics VIN Input voltage 90 fAC Input frequency 47 IIN Input current VIN = nom, IOUT = max VIN_UVLO Input UVLO IOUT = min to max VIN_OV Input OV IOUT = min to max 265 PF Power factor VIN = nom, 50% load 0.9 82.3 115 264 VAC 63 Hz 1.
Schematic Schematic + + + 4 www.ti.com Figure 1.
Test Setup www.ti.com 5 Test Setup 5.1 Test Equipment Voltage Source (Main): 90 VAC to 265 VAC, 2.0 AAC, such as Agilent 6813B AC Power Source/Analyzer, or equivalent. Voltage Source (Bias): 10 VDC/0.2 A. Multimeters: 100 VDC/1.5 ADC four-digit display meters, such as Fluke 45 Dual Display Multimeter, or equivalent. Output Load: 100 VDC/1.5 ADC load such as TDI RBL488 Electronic Load 100-120-800, or equivalent. Fan: 200 LFM minimum.
Test Setup 5.3 www.ti.com List of Test Points Table 2. Test Point Function 6 TEST POINTS NAME TP1 LINE input DESCRIPTION TP2 NEUTRAL input TP3 GND TP4 Rectifier Input TP5 FET Drive TP6 GND Reference ground for power TP7 3V3B 3.
Test Procedure www.ti.com 6 Test Procedure Set up the EVM per Figure 2. CAUTION High voltage and high temperature present when the EVM is in operation! High voltage present for some time after power down of the EVM. Check output terminals with a voltmeter before handling the EVM! 6.1 Power Factor and Efficiency Measurement Procedure 1. 2. 3. 4. Check the switch S1 at ON position. If S1 is not at ON position, switch S1 to the position ON.
Performance Data and Typical Characteristic Curves www.ti.com 7 Performance Data and Typical Characteristic Curves 7.1 Efficiency at 115 VAC and 230 VAC Figure 3 98.0% 96.0% Efficiency 94.0% 92.0% 90.0% 88.0% 86.0% 84.0% 82.0% 0.201 0.401 0.601 0.801 1.002 1.202 Load Current: A 115Vac 60Hz 230Vac 50Hz Figure 3. Efficiency with 115 VAC and 230 VAC (Test Points: TP1, TP2, TP12 and TP13) 7.2 Efficiency at Full Load with Respect to Input Voltage Figure 4 98.0% Efficiency at full load 97.
Performance Data and Typical Characteristic Curves www.ti.com 7.3 Power Factor at 115 VAC and 230 VAC Power Factor Figure 5 1.000 0.950 0.900 0.850 0.800 0.750 0.700 0.650 0.600 0.550 0.500 0.201 0.401 0.601 0.801 1.001 1.201 Load Current: A 115Vac 60Hz 230Vac 50Hz Figure 5. PF with 115 VAC and 230 VAC (Test Points: TP1, TP2, TP12 and TP13) 7.4 Power Factor at Full Load with Respect to Input Voltage Figure 6 0.980 Power Factor at Full Load 0.960 0.940 0.920 0.900 0.880 0.860 0.840 0.820 0.
Performance Data and Typical Characteristic Curves 7.5 www.ti.com Input Current Harmonic Content (IEC EN61000-3-2 Limits for Class D Equipment) Input Harmonic Content EVM Limits Current: mArms 1000.00 100.00 10.00 1.00 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 Harmonic Number (230Vac, 50Hz, Full Load) Figure 7. Harmonic Content with 230Vac Input (Vin = 230Vac at 50Hz, Io = 1.2A Test Points: TP1, TP2, TP12 and TP13) 7.
www.ti.com 7.7 Performance Data and Typical Characteristic Curves No-Load Output Turn On Figure 9.
Performance Data and Typical Characteristic Curves 7.8 www.ti.com Output Voltage Ripple Figure 10. Output Voltage Ripple (VIN = 230 VAC at 50 Hz, IO = 1.
www.ti.com 7.9 Performance Data and Typical Characteristic Curves Input Voltage and Current Figure 11. Input Waveforms (VIN = 230 VAC at 50 Hz, IO = 1.2 A Test Points: TP1 and TP2) 7.10 EMI Performance Achievable on a Full 90-W Adapter Design (reference to SEM1900 topic 4) NOTE: This EVM is not designed to meet the EMI standard. A reference design shown in SEM1900 does.
Performance Data and Typical Characteristic Curves www.ti.com Figure 12. EMI Conducted Emission Test (Vin = 230Vac at 50Hz, Io = 1.
EVM Assembly Drawing and PCB layout www.ti.com 8 EVM Assembly Drawing and PCB layout The following figures (Figure 13 through Figure 18) show the design of the UCC29910AEVM-730 printed circuit board. PCB dimensions: L x W = 6.1 inch x 3.0 inch, four layers and 2-oz copper on outer layers and 1-oz copper on inner layers. J4 L4 J5 Figure 13. UCC29910AEVM-730 Top Layer Assembly Drawing (top view) Figure 14.
EVM Assembly Drawing and PCB layout www.ti.com Figure 15. UCC29910AEVM-730 Top Copper (top view) Figure 16.
EVM Assembly Drawing and PCB layout www.ti.com Figure 17. UCC29910AEVM-730 Internal Layer 2 (top view) Figure 18.
List of Materials 9 www.ti.com List of Materials Table 3.
List of Materials www.ti.com Table 3. The EVM Components List (according to the schematic shown in ) (continued) REF DES QTY DESCRIPTION PART NUMBER MFR R1, R13 2 Resistor, chip, 1/8 W, 1%, 0805, 0 Ω std std R11, R17, R18, R35, R36 5 Resistor, chip, 1/8 W, 1%, 0805, 10 kΩ std std R12 1 Resistor, chip, 1/8 W, 1%, 0805, 680 kΩ std std R14 1 Resistor, chip, 1/8 W, 1%, 0805, 3.
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