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Related Manuals for Texas Instruments TPS6420xEVM-023
Summary of Contents for Texas Instruments TPS6420xEVM-023
- Page 1 TPS6420xEVM 023 User’s Guide October 2003 PMP Portable Power SLVU093...
- Page 2 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 & application solutions:...
- Page 3 EVM IMPORTANT NOTICE Texas 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 EVALUATION PURPOSES ONLY 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 required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods.
- Page 4 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...
- Page 5 About This Manual This users guide describes the characteristics, operation, and use of the TPS6420xEVM-023 evaluation module (EVM). This EVM contains Texas Instruments high-efficiency non-synchronous buck controller that is configured to provide a regulated 3.3-V output voltage and up to 2 A of current.
- Page 6 Contents Trademark Powermite is a registered trademark of Microsemi Corporation.
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Page 8: Table Of Contents
Contents Contents Introduction ..............Background . - Page 9 Contents Figures 2−1 TPS64202 Efficiency ............3−1 Top Assembly Layer .
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Page 10: Introduction
Chapter 1 Introduction This chapter contains background information for the TPS6420xEVM-023 evaluation module. Topic Page Background .......... -
Page 11: Background
Background 1.1 Background This TPS6420xEVM uses a TPS64202 step down controller, external p-channel FET, and Schottky diode. Although the TPS64202 input voltage range is 1.8 V to 6 V, this EVM was configured to provide 2 A at 3.3 V , so the input voltage is limited to 3.3 V to 6 V. - Page 12 Modifications Large inductor area under removable solder mask Extra input and output capacitor pads Resistors R6 and R7 can be left open and R5 can be shorted (by a 0 Ω resistor) to allow current sensing by Q1’s r DS(on) Resistor R8 and capacitor C7 can be populated to provide an RC snubber which dampens the oscillations and resulting EMI produced at the switch node when the device operates in discontinuous mode.
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Page 13: Evm Operation
Chapter 2 EVM Operation This chapter describes how to properly test the TPS64202 using the TPS6420xEVM. Topic Page Input/Output Connections ........Test Setup . -
Page 14: Input/Output Connect
Input/Output Connect 2.1 Input/Output Connect The EVM connection points are described in the following paragraphs. 2.1.1 J1−Vin This is the positive connection to the input power supply. The leads to the input supply should be twisted and kept as short as possible. 2.1.2 J2−GND This is the return connection to the input power supply. -
Page 15: Test Setup
Test Setup 2.2 Test Setup The absolute maximum input voltage is 7 V. The TPS62402, with V = 3.3 V, is designed to operate with a maximum input voltage of 6 V. Connect a power supply with output voltage between 3.3 V and 6 V and current limit set to at least 1.3 times the expected maximum output current, or for this EVM, 2.6 A. -
Page 16: Board Layout
Chapter 3 Board Layout This chapter provides the TPS6420xEVM board layout and illustrations. Topic Page Layout ............Board Layout... -
Page 17: Layout
Layout 3.1 Layout Board layout is critical for all switch mode power supplies. Figures 3−1, 3−2, and 3−3 show the board layout for the HPA023 PWB. The switching nodes with high frequency noise are isolated from the noise sensitive feedback circuitry and careful attention has been given to the routing of high frequency current loops. -
Page 18: Bottom Layer Routing
Layout Figure 3−3. Bottom Layer Routing Board Layout... -
Page 20: Bill Of Materials And Schematic
Chapter 4 Bill of Materials and Schematic This chapter provides the TPS6420xEVM-023 bill of materials and schematic. Topic Page Bill of Materials .......... -
Page 21: Bill Of Materials
Bill of Materials 4.1 Bill of Materials Table 4−1. Bill of Materials Count RefDes Description Size Part Number Capacitor, ceramic, 4.7 µF, 50 V, C0G, ±10% C1608X7R1H4R7DT Capacitor, POSCAP, 4.7 µF, 6.3 V, 100 mΩ, 6032(C) Sanyo 6TPA47M C3, C5 Capacitor, Multi-pattern, 603-D case 7343 (D) Capacitor, ceramic, 10 µF, 10 V, X7R, ±10%... -
Page 22: Tps6420Xevm Schematic
Schematic 4.2 Schematic Figure 4−1. TPS6420xEVM Schematic Bill of Materials and Schematic... - Page 24 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS64202EVM-023...
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