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Texas Instruments TPS62065 manual

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Table of contents for the manual

  • Page 1

    User's Guide SLVU364 – March 2010 TPS62065/67EVM This user’s guide describes the characteristics, operation, and use of the TPS62065-67EVM-347 evaluation module (EVM). The TPS62065-67EVM-347 is a fully assembled and tested platform for evaluating the performance of both the TPS62065 and TPS62067 2-A step-down converters. This document incl[...]

  • Page 2

    Introduction www.ti.com 1 Introduction The TPS62065-67EVM-347 is a fully assembled and tested pair of PCBs for evaluating the TPS62065 and TPS62067 2-A step-down converters. The EVM comes configured with both a TPS62065 IC and a TPS62067 IC; there are two PCBs, one for each respective step-down converter IC. 1.1 Features • Input voltage range: 3.[...]

  • Page 3

    www.ti.com TPS62056/67EVM Schematic 3 TPS62056/67EVM Schematic Figure 1 shows the TPS62065EVM schematic. Figure 2 illustrates the TPS62067EVM schematic. Figure 1. TPS62065EVM Schematic Figure 2. TPS62067EVM Schematic NOTE: These diagrams are provided for reference only. See Table 2 , the Bill of Materials, for specific component values. 3 SLVU364 ?[...]

  • Page 4

    Connector and Test Point Descriptions www.ti.com 4 Connector and Test Point Descriptions 4.1 Enable Jumpers/Switches: TPS62065EVM 4.1.1 J10 VIN This header is the positive connection to the input power supply. The power supply must be connected between J10 and J12 (GND). The leads to the input supply should be twisted and kept as short as possible.[...]

  • Page 5

    www.ti.com Connector and Test Point Descriptions 4.1.9 J16 VOUT (SMA) This SMA connector is connected to the output voltage of the TPS62065. It can be used to easily analyze the noise spectrum of the output voltage with a spectrum analyzer. By default, J16 is not assembled on the EVM. 4.2 Enable Jumpers/Switches: TPS62067EVM 4.2.1 J20 VIN This head[...]

  • Page 6

    J12 J13 J11 J14 J10 J15 JP10 ON EN OFF VIN GND VOUT GND S+ + S+ S - - S - TPS62065/67EVM-347 DC PowerSupply Load Oscilloscope Test Configuration www.ti.com 4.2.8 JP20 EN This jumper enables/disables the TPS62067 device on the EVM. Shorting jumper JP20 between the center pin and On turns on the unit. Shorting the jumper between center pin and Off[...]

  • Page 7

    www.ti.com Test Configuration 5.2 Testing Procedure Follow these procedures when configuring the EVM for testing. CAUTION Many of the components on the TPS62065/67EVM-347 are susceptible to damage by electrostatic discharge (ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling the EVM, including the use[...]

  • Page 8

    100 95 90 85 80 75 70 65 60 55 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 I (A) OUT Efficiency(%) V =3.0V IN V =3.3V V =3.6V V =4.2V V =5.0V IN IN IN IN L=1.0 H(LQH441R0) C =10 F(0603size) m m OUT V =1.8V Mode:AutoPFM/PWM OUT EFFICIENCYvsL OADCURRENT 2V/div 500mA/div 2A/di[...]

  • Page 9

    2V/div 2V/div 2V/div 1A/div Time(100 s/div) m V =4.2V V =3.3V IN OUT Load=2R2 PGPull-upResistor=10k W TPS62067Startup Time(1ms/div) 5V/div 2V/div 2V/div V =4.2V V =3.3V Load=NoLoad PGPull-upResistor=10k W IN OUT TPS62067Shutdown www.ti.com TPS62[...]

  • Page 10

    Time(4 s/div) m V : 50mV/div OUT SW: 2V/div I : 200mA/div COIL V =3.6V V =1.8V IN OUT L=1.2 H C =10 F m m OUT I =20mA MODE=GND OUT TYPICALOUTPUTVOL T AGERIPPLE(PFMMODE) Time(100ns/div) I : 500mA/div COIL V : 50mV/div OUT SW: 2V/div TYPICALOUTPUTVOL T AGERIPPLE(PW[...]

  • Page 11

    www.ti.com TPS62065/67EVM Test Data 6.5 Control Loop Bode Diagrams: TPS62065 Figure 10 and Figure 11 illustrate typical TPS62065 gain and phase performance versus frequency at VIN = 3.6 V and 5.0 V, respectively, using the TPS62025EVM. Conditions: VIN = 3.6 V, VOUT = 1.8 V, I OUT = 1.6 A; bandwidth: 224 kHz, phase margin: 59° Figure 10. TPS62065 G[...]

  • Page 12

    TPS62065/67EVM-347 Assembly Drawings and Layout www.ti.com 7 TPS62065/67EVM-347 Assembly Drawings and Layout Figure 12 through Figure 16 show the design of the TPS62065/67EVM-347 printed circuit boards. This EVM has been designed using a four-layer, 1-ounce copper-clad PCB (3.81 cm by 4.57 cm) with all components in an active area on the top side o[...]

  • Page 13

    38.10mm (1.50inch) 38.10mm (1.50inch) 45.72mm (1.80inch) www.ti.com TPS62065/67EVM-347 Assembly Drawings and Layout Figure 12. TPS62065/67EVM Component Placement (Top View) 13 SLVU364 – March 2010 TPS62065/67EVM Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated[...]

  • Page 14

    TPS62065/67EVM-347 Assembly Drawings and Layout www.ti.com Figure 13. TPS62065/67EVM Top-Side Copper (Top View) 14 TPS62065/67EVM SLVU364 – March 2010 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated[...]

  • Page 15

    www.ti.com TPS62065/67EVM-347 Assembly Drawings and Layout Figure 14. TPS62065/67EVM Internal Layer 2 (X-Ray View, from Top) 15 SLVU364 – March 2010 TPS62065/67EVM Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated[...]

  • Page 16

    TPS62065/67EVM-347 Assembly Drawings and Layout www.ti.com Figure 15. TPS62065/67EVM Internal Layer 1 (X-Ray View, from Top) 16 TPS62065/67EVM SLVU364 – March 2010 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated[...]

  • Page 17

    www.ti.com TPS62065/67EVM-347 Assembly Drawings and Layout Figure 16. TPS62065/67EVM Bottom-Side Copper (Bottom View) 17 SLVU364 – March 2010 TPS62065/67EVM Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated[...]

  • Page 18

    Bill of Materials www.ti.com 8 Bill of Materials Table 2 lists the bill of materials for the TPS62065/67EVM. Table 2. TPS62065/67EVM Bill of Materials (1) (2) (3) (4) Count RefDes Value Description Size Part Number MFR 2 C10, C20 22 m F Capacitor, ceramic, 10 V, X7R, 10% 1210 GRM32ER71A226K MuRata 2 C11, C21 22 pF Capacitor, ceramic, 10 V, NGO, 5% [...]

  • Page 19

    Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling th[...]

  • Page 20

    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[...]