Texas Instruments UCC28064EVM-004 User Manual
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 V
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.
RMS
to 265 V
and provides power-factor correction.
RMS
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
RMS input voltage (ac line) 85 265 V
Output voltage, V
Line frequency 47 63 Hz
Power factor (PF) at maximum load 0.9
Output power 300 W
Full load efficiency
OUT
UCC28064EVM
MIN TYP MAX
390 V
AC line = 115 V 93%
AC line = 230 V 96%
UNITS
RMS
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Schematics
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.
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UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
Figure 1. UCC28064EVM-004 Schematic Diagram
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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
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Test Setup and Power-Up/Power-Down Instructions
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Figure 2. Test Setup
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UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
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6 Typical Performance Data
Figure 3 through Figure 14 present characteristic performance data for the UCC28064EVM-004.
Typical Performance Data
Figure 3. Efficiency at 115 V
RMS
Figure 4. Efficiency at 230 V
RMS
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
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Typical Performance Data
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
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Table 3. Performance Data at 230Vac (continued)
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UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
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