Texas Instruments UCC28517 User manual

User’s Guide
UCC28517 EVM
User’s Guide

2
EVM 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 time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products Applications
Amplifiers amplifier.ti.com Audio www.ti.com/audio
Data Converters dataconverter.ti.com Automotive www.ti.com/automotive
DSP dsp.ti.com Broadband www.ti.com/broadband
Interface interface.ti.com Digital Control www.ti.com/digitalcontrol
Logic logic.ti.com Military www.ti.com/military
Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork
Microcontrollers microcontroller.ti.com Security www.ti.com/security
Telephony www.ti.com/telephony
Video & Imaging www.ti.com/video
Wireless www.ti.com/wireless
Mailing Address: Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

3
DYNAMIC WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the maximum input voltage ranges specified in Section 6.
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 50°C. The EVM
is designed to operate properly with certain components above 50°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.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

SLUU117C − September 2002 − Revised July 2003
4UCC28517 EVM
UCC28517 EVM
Michael O’Loughlin Power Supply Control Products
Contents
1 Introduction 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Caution 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Schematic 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 List of Materials 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Reference Design Layout 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Electrical Characteristics 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Reference Design Performance 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Introduction
The UCC28517 module is a 100-W offline ac-to-dc voltage converter with power factor correction (PFC). The
prototype was designed to show how the UCC28517 could be configured to control two dc-regulated outputs
offline with one control integrated circuit. The module was design to operate over a universal input range of 85
V to 265 V with two dc regulated outputs. Output B is a 12-V, 8-W regulated output intended to be used as a
bias supply and output A is a 385-V, 100-W regulated output.
For this module to function correctly output B needs a minimum load of 4 W and boost capacitor C3 needs to
be completely discharged before applying power. The input needs a minimum of 85 VAC at power up. If the input
voltage is brought up slowly with the use of an ac source or a variable transformer the bootstrap circuitry will
not function correctly. If this procedure is not followed the reference design will not regulate properly.
2 Caution
High-voltage levels are present on the evaluation module whenever it is energized. Proper precautions must
be taken when working with the module. Output A has a large energy storage capacitor and must be completely
discharged before the module can be handled. Serious injury can occur if proper safety precautions are not
followed.

SLUU117C −September 2002 −Revised July 2003
5
UCC28517 EVM
3 Schematic
The schematic is broken up into three sections to make it more legible for the user.
+
Figure 1. Section A
+
Figure 2. Section B

SLUU117C −September 2002 −Revised July 2003
6UCC28517 EVM
Figure 3. Section C

SLUU117C −September 2002 −Revised July 2003
7
UCC28517 EVM
4 List of Materials
Table 1 lists the components used in this design. With minor component tweaks this design could be modified
to meet a wide range of applications.
Reference Qty Description Manufacturer Part Number
Capacitor C1, C27 2Ceramic, 1 µF, 25 V Panasonic ECJ−3YB1E105K
C2 1 Multi level, 470 nF, 600 V AVX 3640CC474KATBE
C3 1 Electrolytic, 100 µF, 450 V Panasonic ECO−S2WB101BA
C4,C5 0 Ceramic, 1 µF, 25 V Panasonic ECJ−3YB1E105K
C6, C12 2Monolithic ceramic, 47 µF, 16 V TDK C5750X5R16476M7
C7 0 1.2 nF, 1000 V, high voltage MLC AVX 1825AA122KA1ME
C8 0 1.2 nF, 1000 V, high voltage MLC AVX 1825AA122KA1ME
C9 1 Solid tantalum, 100 µF, 4 V Sprague 595D107X9004B2T
C10 1 Ceramic, 330 pF 50 V, X7R Yageo America 08052R331K9B20D
C11, C17 2Ceramic, 100 pF, 50 V Panasonic ECJ−2VC1H101J
C13 1 Ceramic, 56 pF, 50 V Panasonic ECJ−2VC1H560J
C14 1 Ceramic, 150 nF, 25 V Vishay ECJ−2VF1H154Z
C15 1 Ceramic, 220 pF, 50 V Panasonic ECJ−2VC1H221J
C16 1 Ceramic, 10 nF, 50 V Panasonic ECJ−2VB1H103K
C18 1 Ceramic, 0.100 µF, 50 V Panasonic ECJ−2YB1H104K
C19 1 Ceramic, 2.2 nF, 50 V Panasonic ECJ−2VB1H222K
C20, C21 2Ceramic, 2.2 µF, 50 V Panasonic ECJ−3YB1C225K
C22 1 Ceramic, 390 pF, 50 V Panasonic ECU−V1H391KBN
C23 1 Ceramic, 1.5 µF, 16 V Panasonic ECJ−3YB1C155K
C24 1 Ceramic, 100 pF, 50 V Panasonic ECJ−2VC1H101J
C25 1 Ceramic, 150 nF, 25 V Panasonic ECJ−2YB1E154K
C26 1 Metal poly film, 47 nf, 630 V Panasonic ECQ−E6473KF
C28 1 Solid aluminum, 100 µF, 20 V Sanyo 20SVP100M
Diode D1 1 6 A, 600 V General Semiconductor GI756CT
D3 1 Ultra Fast, 6 A, 600 V International Rectifier HFA08TB60
D5 1 Schottky, 1.5 A, 45 V Vishay BYS10−45
D6, D7, D9, D10 4Schottky, 1.5 A, 25 V Vishay BYS10−25
D8 1 Dual Schottky, 2A, 45V International Rectifier 20CJQ045
D14 1 Zener, 10 V, 0.35 W Diodes Inc BZX84C10−7
Rectifier D2 0 Fast, 1.5 A, 800 V Vishay BYG21K
D4 0 Fast, 1.5 A, 800 V Vishay BYG21K
D11 1 Bridge, 6 A, 600 V Diodes Inc PB66
D13, D15 2Programmable reference, TL431 Texas Instruments TL431CPK
Fuse Clip F1 1 Glass Fast Acting Cartridge Type,
6 A, 250 V, 3AG 1.25”x.25” Littlefuse 312 006
FH1, FH2 23AG, for 1.25”x.25” Cooper Electronic
Technologies 1A1907−06
Heat Sink HS1 1 Q1 Aavid 513201B02500
HS2 1 Q2 Aavid 573300D00010
HS3 1 D3 Aavid 579302 B 0 00 00
Inductor L1 1 Coupled, 1.7 mH, 2.5 A Cooper Electronic
Technologies CTX08−14730
PCB 1 Bare Bd UCC28517

SLUU117C −September 2002 −Revised July 2003
8UCC28517 EVM
Reference Qty Description Manufacturer Part Number
FET Q1 1 N Channel, 14 A, 500 V International Rectifier IRFP450
Q2 1 N Channel, 1.7 A, 900 V International Rectifier IRFBF20S
Transistor Q3 1 NPN On Semiconductor MJD50
Q4 1 NPN Philips MMBT2222A
Resistor R1 1 44.2 kΩ, 1/4 W Panasonic ERJ−14NF4422U
R2, R43 210 kΩ, 1/4 W Panasonic ERJ−14YJ103U
R3 1 82 kΩ, 2W, 500 V BC Components FP698202J
R4, R6, R7, R10, R39 510 Ω, 1/4 W Panasonic ERJ−14NF10R0U
R5 1 0.33 Ω, 3 W Huntington Electric ALSR−3−.33
R8 1 2.55 kΩ, 1/10 W Panasonic ERJ−6ENF2551V
R9 1 2 kΩ, 2 W, 500 V BC Components 5083NW2K00J12A
R12 0 1 kΩ, 1/4 W Panasonic ERJ−14YJ102U
R13 1 2 kΩ, 1/10 W Panasonic ERJ−6ENF2001V
R14 1 1.5 kΩ, 1/4 W Panasonic ERJ−6ENF1501V
R15, R19 23.92 kΩ, 1/10 W Panasonic ERJ−6ENF3921V
R16 1 681 Ω, 1/10 W Panasonic ERJ−6ENF6810V
R17 1 7.5 kΩ, 1/10 W Panasonic ERJ−6ENF7501V
R18, R24 2383 kΩ, 1/2 W Panasonic ERJ−14NF3923U
R20 1 22.1 kΩ, 1/4 W Panasonic ERJ−125F3833U
R21, R11, R35 31 kΩ, 1/10 W Panasonic ERJ−6ENF1001V
R22, R33 2562 kΩ, 1/4 W Panasonic ERJ−8ENF5623V
R23, R37, R38 0200 Ω, 1 W, 5% Panasonic ERJ−1WYJ201U
R25 1 133 kΩ, 1/8 W Yageo America 9C08052A1333FKHFT
R26 1 100 Ω, 1/10 W Panasonic ERJ−6GEYJ101V
R27, R29 210 kΩ, 1/10 W Panasonic ERJ−6ENF1002V
R28 1 48.7 kΩ, 1/10 W Panasonic ERJ−6ENF4872V
R30 1 30.1 kΩ, 1/10 W Panasonic ERJ−6ENF3012V
R31, R41, R44 347 Ω, 1/10 W Panasonic ERJ−6GEYJ470V
R32 1 38.3 kΩ, 1/10 W Panasonic ERJ−6ENF3832V
R34 1 1.18 kΩ, 1/8 W Yageo America 9C08052A1181FKHFT
R36 1 200 Ω, 1/10 W Panasonic ERJ−6GEYJ201V
R40 1 1 kΩ, 1/10 W Yageo America 9C08052A1001FKHFT
R42 1 RES 100 Ω, 1/8 W Yageo America 9C08052A1000FKHFT
Transformer T1 1 Flyback Pulse PB2039
IC U1 1 PWM Texas Instruments UCC28517DW
U2 1 Opto Isolator QT Optoelectronics 4N36
Thermal Pad X1 at Q1 1Silicon TO247 Berquist SP900S−104
Nut X2 at Q1 1#6X32 (steel)
Washer X3 at Q1 1Split lock, #6(steel)
X4 at Q1 1Flat #6 (steel)
X6 at Q1 1Nylon shoulder, #6
Screw X5 at Q1 1Pan head #6−32X7/16 (steel)
Posts AC_L,AC_H,
OUTA+,OUTA−,
OUTB+,OUTB−
0 Binding Johnson 111−0701−001

SLUU117C −September 2002 −Revised July 2003
9
UCC28517 EVM
5 Reference Design Layout
HS3
Figure 4. Silkscreen Layer 1
Figure 5. Top View

SLUU117C −September 2002 −Revised July 2003
10 UCC28517 EVM
Figure 6. Bottom View
6 Electrical Characteristics
MIN TYP MAX UNITS
VIN 85 265 VRMS
Output A 370 385 410 V
Output B 11.4 12 12.6 V
Output A Efficiency 95%
Output B Efficiency 50%
POUT A 10 100 W
POUT B 4 8 W
Output Ripple A 12 V
Output Ripple B 750 mV

SLUU117C −September 2002 −Revised July 2003
11
UCC28517 EVM
7 Reference Design Performance
Figure 7
OUTPUT A EFFICIENCY
vs
OUTPUT POWER
Efficiency − %
10 20 30 40 50 60 70 80 90 100
50
55
60
65
70
75
80
85
90
VIN= 265 V
VIN= 175 V
VIN= 85 V
95
100
POUT − Output Power − W
POUTB = 1 W
Figure 8
1 4 6 8
0
0.3
0.5
0.8
0.1
0.2
0.4
0.6
0.7
OUTPUT B SECOND STAGE EFFICIENCY
vs
OUTPUT POWER
Efficiency − %
POUT − Output Power − W
Figure 9
10 20 30 40 50 60 70 80 90 100
0.85
0.90
0.95
VIN= 265 V
VIN= 175 V
VIN= 85 V
1
OUTPUT A POWER FACTOR
vs
OUTPUT POWER
PF − Power Factor
POUT − Output Power − W
Figure 10
10 20 30 40 50 60 70 80 90 100
0
5
10
15
20
25
30
35
VIN= 265 V
VIN= 175 V
VIN= 85 V
OUTPUT A THD
vs
OUTPUT POWER
Current THD − %
POUT − Output Power − W

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
ordersandshouldverifythatsuchinformationiscurrentandcomplete.AllproductsaresoldsubjecttoTI’sterms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgrantedunderanyTIpatent right,
copyright,maskworkright,orotherTIintellectualpropertyrightrelatingtoanycombination,machine,orprocess
inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird-partyproductsorservices
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products Applications
Amplifiers amplifier.ti.com Audio www.ti.com/audio
Data Converters dataconverter.ti.com Automotive www.ti.com/automotive
DSP dsp.ti.com Broadband www.ti.com/broadband
Interface interface.ti.com Digital Control www.ti.com/digitalcontrol
Logic logic.ti.com Military www.ti.com/military
Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork
Microcontrollers microcontroller.ti.com Security www.ti.com/security
Telephony www.ti.com/telephony
Video & Imaging www.ti.com/video
Wireless www.ti.com/wireless
Mailing Address: Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

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