Руководство по эксплуатации Texas Instruments TPS65020EVM-110

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User's Guide
SLVU138–August 2005
TPS65020EVM-110 User's Guide
This User’s Guide describes the characteristics, operation, and use of the
TPS65020EVM-110 evaluation module (EVM). This EVM is designed to help the user
evaluate and test the various operating modes of the TPS65020. This User’s Guide
includes setup instructions for the hardware and software, a schematic diagram, a bill
of materials (BOM), and PCB layout drawings for the evaluation module.
Contents
1 Introduction......................

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www.ti.com Setup 1.3 Printed Circuit Board Assembly The TPS65020EVM-110 PCB contains the TPS65020 IC and its required external components. This board contains several jumpers and connectors that allow the user to customize the board for specific operating conditions. 2 1.4 USB to I C Interface Board (EV2300) The EV2300 is the link that allows the PC and the EVM to communicate. One end of the EV2300 connects to the PC with the supplied USB cable, and the other end of the EV2300 connects to the EV

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www.ti.com Board Layout INPUT / OUTPUT DESCRIPTION J11 – GND Return for VDCDC1 J12 – VDCDC2 Output from DCDC2 switching regulator, maximum output current 1 A, default voltage setting 2.5 V. J13 – GND Return for VDCDC2 J14 – VLDO1 Output from the low drop out regulator VLDO1, maximun current out is 50 mA, default value 1.1 V. J15 – GND Return for VLDO1 J16 –VLDO2 Output from the low drop out regulator, VLDO2 maximum current out is 50 mA, default value 1.3 V. J17 – GND Return for VLDO2 J18 – VDCDC

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www.ti.com Board Layout 3.1 Layout Board layout is critical for all switch mode power supplies. Figure 1 through Figure 5 show the board layout for the TPS65020EVM-110 PWB. The nodes with high switching frequencies and currents are short and are isolated from the noise sensitive feedback circuitry. Careful attention has been given to the routing of high frequency current loops. See to the datasheet for specific layout guidelines. Figure 1. Assembly Layer 4 TPS65020EVM-110 User's Guide SLVU138–Au

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www.ti.com Board Layout Figure 2. Top Layer SLVU138–August 2005 TPS65020EVM-110 User's Guide 5

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www.ti.com Board Layout Figure 3. Routing, GND Plane 6 TPS65020EVM-110 User's Guide SLVU138–August 2005

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www.ti.com Board Layout Figure 4. Routing, VIN Plane SLVU138–August 2005 TPS65020EVM-110 User's Guide 7

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www.ti.com Schematic and Bill of Materials Figure 5. Routing, Bottom Layer 4 Schematic and Bill of Materials This section provides the TPS65020EVM-110 schematic and bill of materials. 8 TPS65020EVM-110 User's Guide SLVU138–August 2005

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www.ti.com Schematic and Bill of Materials 4.1 Schematic Figure 6. TPS65020EVM-110 Schematic SLVU138–August 2005 TPS65020EVM-110 User's Guide 9

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www.ti.com Related Documentation 4.2 Bill of Material Table 1. HPA110A BOM Count Ref Des Value Description Size Part No. MFR –001 –002 C1, C2, C4, C9, 9 9 C10, C11, 10 μF Capacitor, ceramic, 10 μF, 6.3 V, X5R, 20% 0805 C2012X5R0J106K TDK C14, C15, C16 C8, C12, 4 4 2.2 μF Capacitor, ceramic, 2.2 μF, 6.3 V, X5R, 10% 0603 C1608X5R0J225K TDK C13, C18 C3, C6, 4 4 1.0 μF Capacitor, Ceramic, 1.0 μF, 6.3 V, X5R,10% 0603 C1608X5R0J105K TDK C7, C17 1 1 C5 1500 pF Capacitor, Ceramic, 1500 pF, 50 V, X7R, 10

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FCC Warnings This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense

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www.ti.com Related Documentation EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0 V to 4 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. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage

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IMPORTANT NOTICE Texas 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 orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the t