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74408943220 Folha de dados(PDF) 1 Page - Texas Instruments |
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74408943220 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 15 page User 's Guide SLVU641 – January 2012 TPS54120EVM, Low Noise 1A Power Supply Evaluation Module This User ’s Guide describes operational use of the TPS54120 Evaluation Module (PWR103) as a reference design for engineering demonstration and evaluation of the TPS54120, low noise 1A power supply. Included in this user ’s guide are setup and operation instructions, a schematic diagram, layout description, a bill of materials, and test results. Contents 1 Background .................................................................................................................. 2 2 Setup ......................................................................................................................... 2 2.1 Input and Output Connections and Jumper Descriptions ..................................................... 2 2.2 Modifications ........................................................................................................ 3 2.3 Equipment Interconnect ........................................................................................... 4 3 Operation ..................................................................................................................... 4 4 Test Results ................................................................................................................. 4 4.1 Output Voltage Ripple ............................................................................................. 5 4.2 Output Noise ........................................................................................................ 5 4.3 Output Turn On ..................................................................................................... 6 4.4 Load Transient ..................................................................................................... 7 4.5 Efficiency ............................................................................................................ 8 4.6 Thermal Characteristic ............................................................................................ 8 5 Board Layout ................................................................................................................ 9 5.1 Layout Description ................................................................................................. 9 6 Schematic .................................................................................................................. 12 7 Bill of Materials ............................................................................................................. 13 List of Figures 1 Output Voltage of Both the SW and LDO with 400mA Load .......................................................... 5 2 Output Spectrum Noise Density vs. Frequency ........................................................................ 5 3 Switcher Converter Output Voltage Turn-on, SW Enable ............................................................ 6 4 LDO Output Voltage Turn-on, LDO Enable ............................................................................. 6 5 LDO Output Voltage Turn-on, SW Enable ............................................................................... 7 6 TPS54120 Transient Response ........................................................................................... 7 7 TPS54120 Efficiency ....................................................................................................... 8 8 TPS54120 Thermal Image ................................................................................................. 9 9 Top Side Silkscreen and Routing ....................................................................................... 10 10 Second Layer (Internal) Routing ......................................................................................... 11 11 Third Layer (Internal) Routing ............................................................................................ 11 12 Bottom Layer Silkscreen and Routing .................................................................................. 12 13 Schematic .................................................................................................................. 12 List of Tables 1 EVM Specifications ......................................................................................................... 2 2 Sample 1% Resistor Values for Common SW Output Voltages ...................................................... 3 1 SLVU641 – January 2012 TPS54120EVM, Low Noise 1A Power Supply Evaluation Module Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated |
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Descrição semelhante - 74408943220 |
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