Texas Instruments UCC28517 Manuale utente

User’s Guide

UCC28517 EVM

User’s Guide

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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

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

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

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

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

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