Texas Instruments UCC28064EVM-004 User manual

1
SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
User's Guide
SNVU587A–November 2017–Revised October 2018
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
The UCC28064A is a dual-phase, transition-mode Power Factor Correction (PFC) pre-regulator. The
UCC28064EVM-004 is an evaluation module (EVM) with a 390-V, 300-W, dc output that operates from a
universal input of 85 VRMS to 265 VRMS and provides power-factor correction.
Throughout this document, the acronym EVM and the phrases evaluation board and evaluation module
are synonymous with the UCC28064EVM.
Trademarks
Natural Interleaving is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
1 Description
The pre-regulator uses UCC28064A PFC Interleaved Controller to shape the input current wave to provide
power-factor correction. This device uses TI’s Natural Interleaving ™ technology to interleave boost
phases.
This user’s guide provides the schematic, List of Materials, assembly drawing for a single-sided printed
circuit board application, and test set-up information necessary to evaluate the UCC28064A in a typical
PFC application.
2 Thermal Requirements
This evaluation module will operate up to 300 W without external cooling in ambient temperatures of 25°C.
3 Electrical Characteristics
Table 1 summarizes the electrical specifications of the UCC28064EVM-004.
Table 1. UCC28064EVM-004 Electrical Specifications
PARAMETER CONDITIONS UCC28064EVM UNITS
MIN TYP MAX
RMS input voltage (ac line) 85 265 VRMS
Output voltage, VOUT 390 V
Line frequency 47 63 Hz
Power factor (PF) at maximum load 0.9
Output power 300 W
Full load efficiency AC line = 115 V 93%
AC line = 230 V 96%

Schematics www.ti.com
2SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
4 Schematics
Figure 1 shows the schematic for this EVM. See Table 1 for specific values
To evaluate inductor ripple currents, resistors R25 and R26 can be removed and replaced with current loops.
Figure 1. UCC28064EVM-004 Schematic Diagram

www.ti.com Test Setup and Power-Up/Power-Down Instructions
3
SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
5 Test Setup and Power-Up/Power-Down Instructions
WARNING
There are high voltages present on the pre-regulator. It must only
be handled by experienced power supply professionals. To
evaluate this board as safely as possible, the following test
configuration must 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 the EVM.
A separate 13-V bias supply is required to power the UCC28064A control circuitry. The unit will start up
under no-load conditions. However, for safety, a load must be connected to the output of the device before
it is powered up. The unit must also never be handled while power is applied to it or when the output
voltage is above 50-V dc. Refer to Figure 2 for a recommended test setup diagram.
CAUTION
There are very high voltages on the board. Components can and will reach
temperatures greater than 100°C. Use caution when handling the EVM.

Test Setup and Power-Up/Power-Down Instructions www.ti.com
4SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
Figure 2. Test Setup

www.ti.com Typical Performance Data
5
SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
6 Typical Performance Data
Figure 3 through Figure 14 present characteristic performance data for the UCC28064EVM-004.
Figure 3. Efficiency at 115 VRMS
Figure 4. Efficiency at 230 VRMS
Table 2. Performance Data at 115Vac
Pin (W) Power Factor Vo (V) Io (A) Pout (W) Effic (%) THD (%)
.055 388 0
21.2 0.953 387.8 0.05 19.7 92.92 25.43
41.4 0.985 387.10 0.1 39.1 94.44 4.54
61.83 0.993 386.96 0.15 58.46 94.55 3.19
82.43 0.995 387.15 0.2 77.74 94.31 2.82
103.44 0.997 387.05 0.25 97.07 93.84 7.72
122.9 0.995 386.63 0.3 116.3 94.63 3.31
143.3 0.996 386.54 0.35 135.8 94.77 3.04
163.5 0.997 387.09 0.4 154.89 94.73 2.82
184.1 0.997 386.3 0.45 174.03 94.53 2.49
205 0.998 386.21 0.5 193.85 94.56 2.33
225.4 0.998 386.17 0.55 213.74 94.83 2.28
245.7 0.998 386.4 0.6 232.4 94.59 1.92
266.4 0.998 387.2 0.65 251.2 94.29 2.18
287.4 0.999 386.2 0.7 270.9 94.26 1.98
Table 3. Performance Data at 230Vac
Pin (W) Power Factor Vo (V) Io (A) Pout (W) Effic (%) THD (%)
.075 388 0
20 0.829 388.45 0.05 19.37 96.85 38.4
41.16 0.935 386.7 0.1 39.5 95.97 29.08
60.12 0.958 386.88 0.15 58.4 97.14 18.88
80.4 0.975 386.78 0.2 77.8 96.77 14.03
100.21 0.982 386.52 0.25 97.1 96.90 11.72
120.6 0.977 386.81 0.3 116.3 96.43 18.55
140.51 0.982 386.74 0.35 135.47 96.41 15.97

Typical Performance Data www.ti.com
6SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
Table 3. Performance Data at 230Vac (continued)
Pin (W) Power Factor Vo (V) Io (A) Pout (W) Effic (%) THD (%)
160.1 0.986 386.12 0.4 154.89 96.75 14.45
179.74 0.988 386.28 0.45 174.32 96.98 12.94
199.48 0.99 386.39 0.5 193.79 97.15 11.82
219.15 0.991 386.81 0.55 212.6 97.01 10.84
239.04 0.993 386.89 0.6 232.11 97.10 9.89
258.7 0.993 386.53 0.65 251.75 97.31 9.26
278.44 0.994 387.03 0.7 270.4 97.11 8.64

www.ti.com Typical Performance Data
7
SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
6.1 Burst Mode Operation
Figure 5 and Figure 6 illustrate burst mode line current at 115Vac and 230Vac
C2: GDA, C3: GDB, C1: ILINE
Figure 5. 115Vac 20W C2: GDA, C3: GDB, C1: ILINE
Figure 6. 230Vac 20W
6.2 Single Phase Operation
Figure 7 and Figure 8 show the input line current, gate drive signals GDA and GDB in the single phase
mode .
C2: GDA, C3: GDB, C1: I LINE
Figure 7. 115Vac 80W C2: GDA, C3: GDB, C1: I LIN
Figure 8. 230Vac 80W

Typical Performance Data www.ti.com
8SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
6.3 Dual Phase (Interleaved) Operation
Figure 9 and Figure 10 show the input line current, gate drive signals GDA and GDB in the dual phase (or
interleaved) mode phase mode
C2: GDA, C3: GDB, C1: I LINE
Figure 9. 115V 200W C2: GDA, C3: GDB, C1: I LINE
Figure 10. 230V 200W
6.4 Startup Characteristics
Figure 11 and Figure 12 show the startup behaviour at 85Vac and 264Vac
C2: V out , C4: V ACin Figure 11. Startup 85Vac 200W C2: V out , C4: V ACin Figure 12. Startup 264Vac 200W

www.ti.com Typical Performance Data
9
SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
6.5 Load Step
A load transient test was conducted with an ac source on the EVM. The load was varied from 50mA to
500mA to 50mA.
This corresponds to a 20W to 200W to 20W variation.
The results are detailed in Figure 13.
C2: V out , C4: I OUT
Figure 13. Load Step

Line Transient www.ti.com
10 SNVU587A–November 2017–Revised October 2018
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
7 Line Transient
A line transient test was conducted with an ac source on the EVM. The load was fixed at 200W and the
line was varied from 115Vac to 230Vac
The results are detailed in to UCC28064A line step data Figure 14
C2: V out , C4: V inAC
Figure 14. Line Step