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Texas Instruments TPS60230EVM-047 manual

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Table of contents for the manual

  • Page 1

       July 2004 User ’ s G uide SBVU008 PMP Portable Power Products[...]

  • Page 2

    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[...]

  • Page 3

    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[...]

  • Page 4

    EVM W ARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0 V and 7 V . 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 .[...]

  • Page 5

    Preface Read This First About This Manual This user ’s guide provides the information needed to set up and operate the TPS60230EVM-047 evaluation module. For a more detailed description of the TPS60230, please refer to the product data sheet available from the T exas I n - struments web site at http://www .ti.com . Additional support documents ar[...]

  • Page 6

    Contents iv If Y ou Need Assistance If you have questions regarding either the use of this evaluation module or the information contained in the accompanying documentation, please contact your local TI sales representative, the T exas Instruments Product Information Center at (972) 644−5580, or visit the TI Semiconductor Online T echnical Sup- po[...]

  • Page 7

    1 TPS60230EVM-047 TPS60230EVMĆ047 This user ’s guide describes the characteristics, operation, and use of the TPS60230EVM-047 LED charge-pump current-source evaluation module (EVM). This EVM features a high-efficiency charge-pump-based white LED driver designed to operate off a single cell Li-Ion battery and drive up to five white LEDs with up t[...]

  • Page 8

    Introduction 2 1 Introduction The T exas Instruments TPS60230EVM-047 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS60230. This de- vice is an efficient charge-pump-based current sink that can drive up to five white LEDs with 25mA each. Efficiency is improved by switching between a 1.0x and 1.5x mode, based[...]

  • Page 9

    Input/Output Connector Descriptions 3 TPS60230EVM-047 2.2 Setup Connect an input supply or battery between J1 and J2. The voltage range on this supply should stay between 2.7V and 6.0V . Set the appropriate brightness by configuring JP1 and JP2. 2.3 Operation The EVM has been optimized to operate from a single-cell Li-Ion battery with an input volt[...]

  • Page 10

    Printed Circuit Board (PCB) Layout 4 3 Printed Circuit Board (PCB) Layout PCB layout is critical for all switch-mode power supplies. Figure 2, Figure 3, and Figure 4 show the board layout for the TPS60230EVM-047 PWB. The nodes with high switching frequencies and currents are short and are isolated from the noise-sensitive feedback circuitry . Caref[...]

  • Page 11

    Schematic 5 TPS60230EVM-047 4 Schematic Figure 5. TPS60230EVM−047 Schematic 5 Bill of Materials T able 2. Bill of Materials Qty Ref Des Description Size Mfr Part Number 2 C1, C4 Capacitor , ceramic, 1.0 µ F , 6.3V , X5R, 10% 603 TDK C1608X5R0J105KT 2 C2, C3 Capacitor , ceramic, 0.47 µ F , 10V , X5R, 10% 603 TDK C1608X5R1A474KT 5 D1 − D5 Diode[...]