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
Throughout this document, the acronym EVM and the phrases evaluation board and evaluation module
are synonymous with the UCC28060EVM.
1 Description
The pre-regulator uses the UCC28060 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 list, assembly drawing for a single-sided printed
circuit board application, and test set-up information necessary to evaluate the UCC28060 in a typical
PFC application.
2 Thermal Requirements
This evaluation module will operate up to 300 W without external cooling in ambient tempatures of 25 ° C.
to 265 V
RMS
and provides power-factor correction.
RMS
3 Electrical Characteristics
Table 1 summarizes the electrical specifications of the UCC28060EVM.
Table 1. UCC28060EVM Electrical Specifications
PARAMETER CONDITIONS UNITS
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
AC line = 115 V 94%
AC line = 230 V 97%
MIN TYP MAX
UCC28060EVM
RMS
390 V
Natural Interleaving is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
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+
+
Schematics
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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
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+
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Schematics
Figure 2. Controller Circuitry
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Isolation Transformer
0 to 300W Load
VM
+
13V Bias Supply
Test Setup and Power-Up/Power-Down Instructions
5 Test Setup and Power-Up/Power-Down Instructions
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 the EVM.
A separate 13-V bias supply is required to power the UCC28060 control circuitry. The unit will start up
under no-load conditions. However, for safety, a load should be connected to the output of the device
before it is powered up. The unit should also never be handled while power is applied to it or when the
output voltage is above 50-V dc. Refer to Figure 3 for a recommended test setup diagram.
There are very high voltages on the board. Components can and will reach
temperatures greater than 100 ° C. Use caution when handling the EVM.
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WARNING
CAUTION
UCC28060EVM 300-W Interleaved PFC Pre-Regulator4 SLUU280B – May 2007 – Revised July 2008
Figure 3. Test Setup
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Efficiency
90.0%
91.0%
92.0%
93.0%
94.0%
95.0%
96.0%
97.0%
98.0%
99.0%
100.0%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
% Output Powe r
Efficiency (%)
Efficency at Vin 85V RMS
Efficency at Vin = 265V RMS
Efficiency at Vi n = 115V RMS
91.0%
92.0%
93.0%
94.0%
95.0%
96.0%
97.0%
98.0%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
% Output Powe r
Efficiency (%)
With Phase Manage ment
Without Phas e Manage ment
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6 Typical Performance Data
Figure 4 through Figure 7 present characteristic performance data for the UCC28060EVM.
Typical Performance Data
Figure 4. Efficiency at 85V
The UCC28060 control device has phase management capability to improve light load efficiency. To
demonstrate the light load efficiency, the unit efficiency was measured with phase management enabled
and disabled at 115 V
RMS
and 230 V
efficiency up to 3%. Refer to the UCC28060 data sheet for details on how to use the phase management
function of this device.
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Figure 5. Efficiency at 115 V
and 265V
RMS
input voltages. Phase management improved the light load
RMS
, With and Without Phase Management
RMS
RMS
Efficiency at Vi n = 230V RMS
85.0%
87.0%
89.0%
91.0%
93.0%
95.0%
97.0%
99.0%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
% Output Powe r
Efficiency (%)
With Phase Manage ment
Without Phas e Manage ment
1.40706
1.17256
0.93805
0.70354
0.46904
0.23453
0.00002
Amplitude(A)
0 6 12 18 24 30 36 42 48
HarmonicNo.
V =230V
IN RMS
Typical Performance Data
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Figure 6. Efficiency at 230 V
Figure 7. Current Harmonics
, With and Without Phase Management
RMS
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6.1 Output Ripple Voltage at Full Load
Figure 8 illustrates the output ripple voltage.
Typical Performance Data
6.2 Input Ripple Current Cancellation
Figure 9 through Figure 14 show the input current (M
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 and Input Ripple Current at Figure 10. Inductor and Input Ripple Current
85 V
Figure 8. V
at Peak of Line Voltage at 85 V
RMS
OUT
Ripple, P
= IL1+ IL2), Inductor Ripple Current (IL1, IL2) versus
1
= 300 W
OUT
Input at Half the Line Voltage
RMS
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Typical Performance Data
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
RMS
Input at Half Peak Line Voltage
RMS
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Figure 13. Inductor and Input Ripple Current Figure 14. Inductor and Input Ripple Current
at V
= 85 V
IN
, P
RMS
= 300 W at V
OUT
IN
= 265 V
, P
RMS
OUT
= 350 W
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Typical Performance Data
6.3 Startup Characteristics
Figure 15 and Figure 16 illustrate the UCC28060EVM startup characteristics.
6.4 Brownout Protection
Figure 15. Start-Up at V
= 85 V
IN
, P
RMS
= Figure 16. Start-Up at V
OUT
IN
= 265 V
, P
RMS
OUT
350 W W
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 64 V
. Once the UCC28060 control device has determined that the
RMS
input is in a brownout condition, a 400-ms timer starts to allow the line to recover before shutting down the
gate drivers. After 400 ms of brownout, both gate drivers turn off, as shown in Figure 17 and Figure 18 .
= 0
Figure 17. Brownout at 85 V
SLUU280B – May 2007 – Revised July 2008 UCC28060EVM 300-W Interleaved PFC Pre-Regulator 9
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RMS
Figure 18. Brownout at 265 V
RMS
Typical Performance Data
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
RMS
oscilloscope image in Figure 19 , it can be observed that the output recovered from line transients within
300ms at full load.
to 115 V
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to 230 V
RMS
and the transient response was evaluated in each case. From the
RMS
Figure 19. Line Transient, P
= 300W
OUT
UCC28060EVM 300-W Interleaved PFC Pre-Regulator10 SLUU280B – May 2007 – Revised July 2008
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C3
C2
Output 390V
Maximum Load 0.77A
13
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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.
Reference Design Assembly Drawing
Figure 20. Top Layer Assembly
Figure 21. Bottom Layer Copper
SLUU280B – May 2007 – Revised July 2008 UCC28060EVM 300-W Interleaved PFC Pre-Regulator 11
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13
C17
D2
Output 390V
Maximum Load 0.77A
JP8
JP9
List of Materials
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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 0.047 µ F Capacitor, Polyester, 630V, 10% 0.256in × 0.650in ECQ-E6473KZ Panasonic
1 C11 220nF Capacitor, Ceramic, 16V, X7R, 10% 1206 Std Std
2 C12, C13 2.2 µ F Capacitor, Ceramic, 16V, X7R, 10% 0805 Std Std
1 C14 22 µ F Capacitor, Aluminum, 35V, ± 20% 0.200in × 0.435in ECA-1VM220 Panasonic
1 C15 1nF Capacitor, Ceramic, 25V, X7R, 10% 0805 Std Std
1 C16 10nF Capacitor, Ceramic, 25V, X7R, 10% 0805 Std Std
2 C2, C3 100 µ F Capacitor, Aluminum, 450VDC, ± 20% 18mm × 40 mm EKXG451ELL101 Nippon
1 C4 0.1 µ F Capacitor, Film, 275VAC, ± 20% 0.689in × 0.236in ECQU2A104BC1 Panasonic
2 C5, C6 0.47 µ F Capacitor, Film, 275VAC, ± 20% 0.236 × 0.591 ECQ-U2A474MG Panasonic
2 C7, C8 22pF Capacitor, Ceramic, 25V, X7R, 10% 0805 Std Std
3 C9, C10, C17 1.2nF Capacitor, Ceramic, 25V, X7R, 10% 0805 Std Std
3 D1, D2, D4 MURS360T3 Diode, 3000mA, 600V SMC MURS360T3 On Semi
1 D3 GBU6J Diode, Bridge, 6A, 600V BU6 GBU6J Vishay
2 F1 0100056H Fuse Clip, 5mm x 20mm 0.205in × 0.220in 0100056H Wickmann
x2
1 F1 BK/GDA-4A 4A, Fast Acting Fuse 5mm × 20mm BK/S501-4-R Cooper/
3 HS1, HS2, HS3 7-345-2PP Heatsink, Universal-mount TO-220 1.500in × 2.000in 7-345-2PP IERC-CTS
1 J1 ED1609-ND Terminal Block, 2-pin, 15-A, 5.1mm 0.40in × 0.35in ED1609 OST
MM40S Chemi-con
Bussman
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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
3 JP2, JP4, JP5 923345-20-C Jumper, 2.000 inch length, PVC Insulation, 0.035in dia. 923345-20-C 3M
1 JP3 923345-06-C Jumper, 0.600 inch length, PVC Insulation, 0.035in dia. 923345-06-C 3M
1 JP6 923345-05-C Jumper, 0.500 inch length, PVC Insulation, 0.035in dia. 923345-05-C 3M
1 JP7 923345-20-C Jumper, 1.200 inch length, PVC Insulation, 0.035in dia. Cut to Dimension 3M
2 JP8, JP9 0 Resistor, Chip, 1W, 5% 2512 Std Std
1 PCB HPA224 Printed Circuit Board
2 L1, L2 CTX16-17769R Inductor, Boost PFC With Aux. 330 µ H at 5.3 1.555in dia. CTX16-17769R Cooper
2 Q1, Q2 IRFB11N50APbF MOSFET, N-ch, 500V, 11A, 520m Ω TO-220V IRFB11N50APbF IR
1 R1 51.1 Resistor, Chip, 1/10W, 1% 0805 Std Std
2 R13, R14 47.0k Resistor, Chip, 1/10W, 1% 0805 Std Std
1 R15 121.0k Resistor, Chip, 1/10W, 1% 0805 Std Std
2 R16, R24 5.11 Resistor, Chip, 1/10W, 1% 0805 Std Std
1 R17 0.00 Resistor, Chip, 1/10W, 1% 0805 Std Std
1 R18 6.19k Resistor, Chip, 1/10W, 1% 0805 Std Std
1 R19 30.1k Resistor, Chip, 1/10W, 1% 0805 Std Std
3 R2, R4, R21 10.0k Resistor, Chip, 1/10W, 1% 0805 Std Std
1 R25 100 Resistor, Chip, 1/10W, 1% 0805 Std Std
1 R3 0.015 Resistor, Chip, 1/2W, 1% 2010 WSL2010R0150F Vishay
9 R5–R9, R10, 1.00M Resistor, Chip, 1/10W, 1% 0805 Std Std
R12, R20, R22,
R23
2 R8, R11 20.5k Resistor, Chip, 1/10W, 1% 0805 Std Std
1 RT1 5 Ω Thermistor, NTC, 5 Ω , 6A 0.180in × 0.550in CL-40 Thermo-
2 TP1, TP2 K24A/M Pin, Thru Hole, Tin Plate, for 0.062 PCBs 0.039in K24A/M Vector
1 U1 UCC28060D IC, Interleave PFC Controller SO16 UCC28060D TI
1 VAR1 SIOV-S10K275E2 VARISTOR 275V RMS 0.472in × 0.213in S10K275E2 Epcos
6 X1 at HS1 and Nut #4-40 (steel) Std Std
D3, HS2 and
Q1, HS3 and
Q2
6 X1 at HS1 and Pan Head Screw #4-40X3/8 (steel) Std Std
D3, HS2 and
Q1, HS3 and
Q2
1 X1 D3 and HS1 Thermal Grease Std Std
6 X1 at HS1 and Split Lock Washer #4(steel) Std Std
D3, HS2 and
Q1, HS3 and
Q2
6 X1 at HS1 and Nylon Shoulder Washer #4 3049 Keystone
D3, HS2 and Electronics
Q1, HS3 and
Q2
2 X1 at HS2 and Thermal Pad Silicon TO220 3223-07FR-51 BERQUIST
Q1, HS3 and
Q2
AWG 22
AWG 22
AWG 22
AWG 22
AWG 22
A PK
EA
metrics
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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 complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
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Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
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EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 85V
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions
concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than +100 ° C. The EVM is designed to operate
properly with certain components above +100 ° C as long as the input and output ranges are maintained. These components include but are
not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified
using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,
please be aware that these devices may be very warm to the touch.
to 265V
RMS
and the output voltage range of 375V to 450V.
RMS
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