Texas Instruments TPS22925EVM Manual de usuario

User's Guide

SLVUAM2A–November 2015–Revised January 2016

TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load

Switch Evaluation Module

The TPS22925 evaluation module (EVM) allows the user to connect power to and control the 6-pin YPH

package load switch. Parameters such as the on-resistance, rise time, and output pull-down resistance

can be easily evaluated. Table 1 lists a short description of the TPS22925 load switch performance

specifications; for additional details on load switch performance, application notes, and the datasheet see

www.ti.com/loadswitch.

Table 1. TPS22925 Rise Time, Output Current Rating, Enable, and Output Discharge

Characteristics

Rise Time Maximum Enable Quick Output

EVM Device VIN (V)

Typical Continuous Current (ON Pin) Discharge

HVL135-001 TPS22925B 100 μs 3.6 3 A Active High Yes

HVL135-002 TPS22925BN 100 μs 3.6 3 A Active High No

HVL135-001 TPS22925C 810 μs 3.6 3 A Active High Yes

HVL135-002 TPS22925CN 810 μs 3.6 3 A Active HIgh No

Contents

1 Introduction ................................................................................................................... 2

1.1 Description........................................................................................................... 2

1.2 Features.............................................................................................................. 2

2 Electrical Performance...................................................................................................... 2

3 Schematic..................................................................................................................... 2

4 Layout ......................................................................................................................... 3

4.1 Setup ................................................................................................................. 5

5 Operation ..................................................................................................................... 6

6 Test Configurations.......................................................................................................... 7

6.1 On-Resistance (RON) Test Setup.................................................................................. 7

6.2 Slew Rate Test Setup.............................................................................................. 8

7 Bill of Materials (BOM) ...................................................................................................... 9

List of Figures

1 TPS22925EVM Schematic ................................................................................................ 2

2 TPS22925EVM Top Assembly............................................................................................. 3

3 TPS22925EVM Top Layout ............................................................................................... 4

4 TPS22925EVM Bottom Layout ............................................................................................ 5

5 RON Setup ..................................................................................................................... 7

6 Slew Rate Setup............................................................................................................. 8

List of Tables

1 TPS22925 Rise Time, Output Current Rating, Enable, and Output Discharge Characteristics................... 1

2 Bill of Materials TPS22925EVM ........................................................................................... 9

SLVUAM2A–November 2015–Revised January 2016 TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation

Module

Introduction

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1 Introduction

1.1 Description

The TPS22925EVM is a two-sided PCB containing the TPS22925 load switch devices. The VIN and

VOUT connections to the device and the PCB layout routing are capable of handling high continuous

currents and provide a low resistance pathway into and out of the device under test. Test point

connections allow the EVM User to control the device with user defined test conditions and make accurate

RON measurements.

1.2 Features

• VIN input voltage range: 0.65 V to 3.6 V.

• EVM allows access to the VIN, VOUT, GND, and ON pin of the TPS22925 Load Switch Devices.

• On board CIN and COUT capacitors.

• 3 A max continuous current operation.

•24-mm2Load Switch solution size sampled on this EVM.

2 Electrical Performance

Refer to the datasheet (SLVS840) for detailed electrical characteristics of the TPS22925.

3 Schematic

Figure 1. TPS22925EVM Schematic

2TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016

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Layout

4 Layout

Figure 2. TPS22925EVM Top Assembly

SLVUAM2A–November 2015–Revised January 2016 TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation

Module

Layout

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Figure 3. TPS22925EVM Top Layout

4TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016

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Layout

Figure 4. TPS22925EVM Bottom Layout

4.1 Setup

This section describes the jumpers and connectors on the EVM as well as how to properly connect, set

up, and use the EVM.

4.1.1 J1/J5 – Input Connection

This is the connection for the leads from the input source. Connect the positive lead to J1/J5 and the

negative lead to J3/J7 (GND).

4.1.2 J2/J6 – Output Connection

This is the connection for the output of the EVM. Connect the positive lead to J2/J6 terminals and the

negative lead to J4/J8 terminals (GND).

4.1.3 JP1/JP4 – ON

This is the enable input for the device. A shorting jumper must be installed on JP1/JP4 in either the high

or low position. The TPS22925 is active high. ON must not be left floating. An external enable source can

be applied to the EVM by removing the shunt and connecting a signal to TP2/TP5. Refer to the datasheet

for proper ON and OFF voltage level settings. A switching signal may also be used and connected at this

point.

SLVUAM2A–November 2015–Revised January 2016 TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation

Module

Operation

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4.1.4 TP1/TP4 - VIN Sense, TP3/TP6 - VOUT Sense

These two connections are used when very accurate measurements of the input or output are required.

RON measurements should be made using these sense connections when measuring the voltage drop

from VIN to VOUT to calculate the resistance.

4.1.5 JP2/JP5- Input Capacitor

During normal operation a shorting jumper is placed on JP2/JP5 this connects C1/C3 capacitor from the

input of the device to ground. Refer to the Applications Section of the Datasheet for additional information

on selecting the input capacitor.

4.1.6 JP3/JP6 - Output Capacitor

During normal operation a shorting jumper is placed on JP3/JP6 this connects C2/C4 capacitor from the

output of the device to ground. Refer to the Applications Section of the Datasheet for additional

information on selecting the output capacitor.

4.1.7 J3/J4/J7/J8 – GND

These are connections to GND.

5 Operation

Connect the positive input of the VIN power supply to VIN at J1/J5. Connect the negative lead of the

power supply to GND at J3/J7. The input voltage range of the TPS22925EVM is 0.65 V to 3.6 V.

External output loads can be applied to the switch by using J2/J6 VOUT and J4/J8 GND. The

TPS22925EVM is rated for a maximum continuous current of 3 A. Configure JP1/JP4 as required.

JP1/JP4 must be installed for proper operation. When the ON pin is asserted high, the output of the

TPS22925 will be enabled.

6TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016

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Test Configurations

6 Test Configurations

6.1 On-Resistance (RON) Test Setup

Figure 5 shows a typical setup for measuring on-resistance. The voltage drop across the switch is

measured using the sense connections. This value is then divided by the current into the load, yielding the

RON resistance.

Figure 5. RON Setup

SLVUAM2A–November 2015–Revised January 2016 TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation

Module

Test Configurations

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6.2 Slew Rate Test Setup

Figure 6 shows a test setup for measuring the slew rate of the load switch. Apply a square wave to the

ON pin of the switch using a function generator and apply a voltage to the VIN terminal using a power

supply. Observe waveform at VOUT with a scope to measure the slew rate and rise time of the switch with

a given input voltage.

Figure 6. Slew Rate Setup

8TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation SLVUAM2A–November 2015–Revised January 2016

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Bill of Materials (BOM)

7 Bill of Materials (BOM)

Table 2. Bill of Materials TPS22925EVM

Qty Designator Value Description Package Reference Manufacturer Part Number

1 !PCB1 Printed Circuit Board Any HVL078

2 C1, C3 1uF CAP, CERM, 1uF, 25V, +/-10%, X7R, 0603 0603 MuRata GRM188R71E105KA12D

2 C2, C4 0.1uF CAP, CERM, 0.1uF, 100V, +/-10%, X7R, 0603 0603 MuRata GRM188R72A104KA35D

12 J1, J2, J3, J4, J5, J6, PEC02S Header, 100mil, 2x1, Gold, TH 0.100 inch x 2 Samtec TSW-102-07-G-S

J7, J8, JP2,JP3, JP5, AAN

JP6

2 JP1, JP4 Header, 100mil, 3x1, Gold, TH Header, 3 PIN, 100mil Samtec TSW-103-07-G-S

3 LBL1, LBL2, LBL3 Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per PCB Label 0.650"H x Brady THT-14-423-10

roll 0.200"W

6 SH-J1, SH-J2, SH-J3, 1x2 Shunt, 100mil, Gold plated, Black Shunt 3M, alternate: Samtec 969102-0000-DA, alternate: SNT-

SH-J4, SH-J5, SH-J6 100-BK-G

6 TP1, TP2, TP3, TP4, Test Point, Miniature, SMT Test Point, Miniature, Keystone 5019

TP5, TP6 SMT

1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925BYPHR

1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925BNYPHR

1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925CYPHR

1 U1 Single Channel Ultra-Low Resistnace Load Switch YPH0006ACAC Texas Instruments TPS22925CNYPHR

0 FID1, FID2, FID3 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A

SLVUAM2A–November 2015–Revised January 2016 TPS22925EVM 3.6-V, 3-A, 9-mΩOn-Resistance Load Switch Evaluation

Module

Revision History

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Revision History

Changes from Original (November 2015) to A Revision ................................................................................................ Page

• Changed 10 mΩto 9 mΩin title of the document..................................................................................... 1

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

10 Revision History SLVUAM2A–November 2015–Revised January 2016

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