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Manual Texas Instruments UCC38500EVM

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  • Texas Instruments UCC38500EVM - page 1

    SLUU068C    User ’ s G uide ...

  • Texas Instruments UCC38500EVM - page 2

    -2    User ’ s G uide February 2005 Power Management Products SLUU068C ...

  • Texas Instruments UCC38500EVM - page 3

    IMPORT ANT NOTICE T exas 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 orde ...

  • Texas Instruments UCC38500EVM - page 4

    EVM IMPORT ANT NOTICE T exas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EV ALUA TION PURPOSES ONL Y and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of ...

  • Texas Instruments UCC38500EVM - page 5

    EVM W ARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 85 V to 265 V and the output voltage of 12 V +/− 5%. 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 representat ...

  • Texas Instruments UCC38500EVM - page 6

    Contents Contents 1 General Information 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Features 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Description 1-2 . . . . . . . . ...

  • Texas Instruments UCC38500EVM - page 7

    1-1 General Information General Information This chapter details the T exas Instruments (TI) DM38500 PFC/PWM Combination Controller 100W Power Factor Correction Preregulator Evaluation Module (EVM) SLUU068. It includes a list of EVM features, a brief description of the module illustrated with a pictorial, schematic diagrams, and EVM specifications. ...

  • Texas Instruments UCC38500EVM - page 8

    Features 1-2 1.1 Features UCC38500 PFC/PWM Combination Controller 100W Power Factor Correc- tion Preregulator include: J Combines PFC and 2nd Stage Down Converter Controls J Controls Boost Preregulator to Near-unity Power Factor J Accurate Power Limiting J Improved Feedforward Line Regulation J Peak Current Mode Control in Second Stage J Programmab ...

  • Texas Instruments UCC38500EVM - page 9

    Description 1-3 General Information 1.3 Operating Guidelines The operating guidelines for the evaluation board are provided with reference to the schematic in Figure 1−1 and the component layout in Figure 2−1. 1.3.1 Step 1. Load Connections A resistive or electronic load can be applied to the output terminals labeled OUT− and OUT+. Note: For ...

  • Texas Instruments UCC38500EVM - page 10

    Description 1-4 Figure 1−1. DM38500 Evaluation Module Application Schematic UDG−00094 12 10 9 5 2 6 11 13 7 8 4 3 1 16 17 15 18 19 14 20 OVP/ENBL VSENSE V AOUT ISENSE MOUT CAOUT IAC VFF PKLIMIT VREF GT1 GT2 VCC CT RT GND PWRGND SS2 VERR ISENSE2 UCC38500 V REF Q5 R25 V CC R7 R6 GT1 GT2 D10 D9 C27 PKLIMIT C28 R17 C19 C22 R28 C25 R23 R34 R21 R22 R ...

  • Texas Instruments UCC38500EVM - page 11

    DM38500 EVM Performance 1-5 General Information 1.4 DM38500 EVM Performance Figure 1−2 through 1−4 shows the typical evaluation module performance. Figure 1−2. DM38500 EVM Efficiency UCC38500 EFFICIENCY vs OUTPUT POWER 50 55 60 65 70 75 80 85 90 20 10 40 30 60 50 80 70 90 100 V IN = 85 V V IN = 175 V V IN = 265 V P OUT − W Efficiency −% F ...

  • Texas Instruments UCC38500EVM - page 12

    DM38500 EVM Performance 1-6 Figure 1−4. DM38500 T otal Harmonic Distortion 0 5 10 15 20 25 30 20 10 40 30 60 50 80 70 90 100 35 UCC38500 TOT AL HARMONIC DISTORTION vs OUTPUT POWER P OUT − W T otal Harmonic Distortion V IN = 85 V V IN = 175 V V IN = 265 V ...

  • Texas Instruments UCC38500EVM - page 13

    2-1 Reference Reference This chapter includes a parts list and PCB layout illustrations for the DM38500 EVM. T opic Page 2.1 DM38500 EVM Part Descriptions 2−2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 DM38500 Board Layouts 2−4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 2 ...

  • Texas Instruments UCC38500EVM - page 14

    DM38500 EVM Part Descriptions 2-2 2.1 DM38500 EVM Part Descriptions T able 2−1. DM38500 Part Descriptions Description Reference Qty V alue/T ype Number Manufacturer Part Number C12, C20, C29 3 1 µ F , 50 V , polypropylene Panasonic ECQ−V1H105JL C13 1 47 pF , 50 V , ceramic Panasonic ECU−S2A470JCA C7, C16, C14 3 10 nF , 50 V , ceramic Panason ...

  • Texas Instruments UCC38500EVM - page 15

    DM38500 EVM Part Descriptions 2-3 Reference Description Reference Qty V alue/T ype Number Manufacturer Part Number R1, R12 2 Short R10, R36 2 200 Ω, ¼ W R25, R29, R27 3 10 k Ω , ¼ W R13 1 2 k Ω , ¼ W R14 1 1.5 k Ω , ¼ W R15, R19 2 3.92 k Ω , ¼ W R16 1 750 Ω , ¼ W R17 1 7.5 k Ω , ¼ W R18, R24 2 392 k Ω , ¼ W R2, R1 1 2 1 k ? ...

  • Texas Instruments UCC38500EVM - page 16

    DM38500 Board Layouts 2-4 2.2 DM38500 Board Layouts Board layout examples of the DM38500 EVM PCB are shown in the following illustrations. They are not to scale and appear here only as a reference. Figure 2−1. DM38500 EVM PC Board: T op Assembly ...

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