Texas Instruments TPS22810EVM Manuale utente

SLVUAY7B–November 2016–Revised January 2018

TPS22810 Load Switch Evaluation Module

User's Guide

SLVUAY7B–November 2016–Revised January 2018

TPS22810 Load Switch Evaluation Module

The TPS22810EVM evaluation module (EVM) allows the user to connect power to and control the 6-pin

TPS22810 load switch device. Parameters such as the on-resistance, rise time, and quick output

discharge can easily and accurately be evaluated. Table 1 lists a short description of the TPS22810 load

switch performance specifications.

Table 1. TPS22810 Rise Time, Output Current Rating, Enable, Undervoltage Lockout, and Output

Discharge Characteristics

EVM Device Rise Time Typical

(μs) VIN (V) Maximum Continuous

Current (A) Enable

(EN/UVLO) Quick Output

Discharge

TPS22810EVM TPS22810DBV (CH1) Adjustable 2.7 to 18 2 Active High Adjustable

TPS22810EVM TPS22810DRV (CH2) Adjustable 2.7 to 18 3 Active High Adjustable

NOTE: The TPS22810-Q1 can also be evaluated on this EVM by replacing the TPS22810DBV (U1)

with the TPS22810TDBVRQ1.

Trademarks

All trademarks are the property of their respective owners.

1 Introduction

1.1 Description

The TPS22810EVM is a two-layer PCB containing the TPS22810 load switch device. The TPS22810EVM

supports two packages for TPS22810 device, SOT-23 package (DBV) on CH1 and SON package (DRV)

on CH2. 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

This EVM has the following features:

• VIN input voltage range: 2.7 to 18 V

• Access to the VIN, VOUT, CT, QOD, GND, and EN pins of the TPS22810 load switch device

• Onboard CIN, COUT, and CT capacitors

• 2-A maximum continuous current operation for TPS22810DBV

• 3-A maximum continuous current operation for TPS22810DRV

• Ability to adjust the QOD resistance using jumpers

• Ability to change COUT capacitor using jumpers

VIN

GND 2

EN/UVLO

QOD 5

VOUT 6

TPS22810DBV

GND

GNDGND

GND

TP2

VIN1_SENSE

TP6

EN1

TP3

VOUT1_SENSE

VIN1

2.7V to 18V

VOUT1

GND GND

VOUT1

QOD1

EN1

VIN1

CT1

249

511

TP5

CT1

GND GND

GND

TP8

GND

TP7

GND

TP1

VIN1

TP4

VOUT1

0.022µF

1µF

0.1µF

GND

10µF

562k

DNP

100k

DNP Green

VOUT1

GND2

TP10

VIN2_SENSE

TP14

EN2

TP11

VOUT2_SENSE

VIN2

2.7V to 18V

VOUT2

3A Max

VOUT2

QOD2

EN2

VIN2

CT2

TP13

CT2

J7 TP16

GND2

TP15

GND2

TP9

VIN2

TP12

VOUT2

0.022µF

1µF

0.1µF

10µF

562k

DNP

100k

R10

DNP Green

VIN2

VOUT2

VIN

GND 4

EN/UVLO

QOD 2

VOUT 1

PAD 7

TPS22810DRV

GND2

GND2 GND2

GND2

GND2 GND2

GND2

GND2GND2

VIN1

47k

249

511

2A Max

Schematic

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2 Schematic

Figure 1 illustrates the EVM schematic.

Figure 1. TPS22810EVM Schematic

3 General Configurations

3.1 Physical Access

Table 2 lists the TPS22810EVM input and output connector functionality, Table 3 describes the test point

availability, and Table 4 describes the jumper functionality.

Table 2. Input and Output Connector Functionality

Connector Label Description

T1 CH1 VIN1(+), GND(–) CH1 input power supply to the EVM

T2 VOUT1(+), GND(–) CH1 output from the EVM

T3 CH2 VIN2(+), GND2(–) CH2 input power supply to the EVM

T4 VOUT2(+), GND2(–) CH2 output from the EVM

Table 3. Test Points Description

Channel Test Points Label Description

CH1

TP1 VIN1 CH1 power supply input

TP2 VIN1_SENSE CH1 input voltage sense

TP3 VOUT1_SENSE CH1 output voltage sense

TP4 VOUT1 CH1 output voltage

TP5 CT1 CH1 slew rate control voltage

TP6 EN1 CH1 enable input

TP7, TP8 GND GND

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General Configurations

SLVUAY7B–November 2016–Revised January 2018

TPS22810 Load Switch Evaluation Module

Table 3. Test Points Description (continued)

Channel Test Points Label Description

CH2

TP9 VIN2 CH2 power supply input

TP10 VIN2_SENSE CH2 input voltage sense

TP11 VOUT2_SENSE CH2 output voltage sense

TP12 VOUT2 CH2 output voltage

TP13 CT CH2 slew rate control voltage

TP14 EN2 CH2 enable input

TP15, TP16 GND2 GND

Table 4. Jumper and LED Descriptions

Jumper Label Description

J1 UVLO CH1 UVLO selection

spac1-2 position disables the device

spac2-3 position sets default UVLO and enables the device

spacOpen position sets UVLO according to R4 and R5 ratio

J2 QOD

CH1 Quick Output Discharge (QOD) resistance selection

spac1-2 position sets 511-Ωexternal resistance in series with the QOD pin

spac3-4 position sets 249-Ωexternal resistance in series with the QOD pin

spac5-6 position sets default internal value

spacOpen position disables QOD function

J3 J3 CH1 10-µF capacitor connects to VOUT1, if installed

J4 J4 CH1 output power indicator LED pulled to VOUT1, if installed

J5 UVLO CH2 UVLO selection

spac1-2 position disables the device

spac2-3 position sets default UVLO and enables the device

spacOpen position sets UVLO according to R9 and R10 ratio

J6 QOD

CH2 Quick Output Discharge (QOD) resistance selection

spac1-2 position sets 511-Ωexternal resistance in series with the QOD pin

spac3-4 position sets 249-Ωexternal resistance in series with the QOD pin

spac5-6 position sets default internal value

spacOpen position disables QOD function

J7 J7 CH2 10-µF capacitor connects to VOUT2, if installed

J8 J8 CH2 output power indicator LED pulled to VOUT2, if installed

D1, D2 (GREEN-

LED) Output power indicator CH1, CH2 output power indicators, respectively. LED turns on whenever the

output voltage is available.

3.2 Test Equipment

This section lists the following equipment required for test setup.

3.2.1 Power Supplies

One adjustable power supply: 0- to 20-V output, 0- to 3-A output current limit.

3.2.2 Meters

One DMM minimum needed and may require more if simultaneous measurements are required.

3.2.3 Oscilloscope

A DPO2024, or equivalent. Three 10× voltage probes and one DC current probe.

Load

12 Ÿ

DMM (mV)

Source

12 V -

General Configurations

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TPS22810 Load Switch Evaluation Module

NOTE: A resistive load is recommended for testing. If an electronic load is used, ensure that the

output load is set in the constant resistance (CR) mode, not in the constant current (CC)

mode.

3.3 Test Configurations

Make sure the evaluation board has default jumper settings as shown in Table 5.

Table 5. Default Jumper Setting for the TPS22810EVM

CH1 CH2

J1 J2 J3 J4 J5 J6 J7 J8

2-3 1-2 Install Install 2-3 1-2 Install Install

Connect the VIN power supply to the T1/T3 terminal (VIN1/VIN2). The input voltage range of the

TPS22810EVM is 2.7 to 18 V. External output loads can be applied to the load switch by using the T2/T4

terminal (VOUT1/VOUT2). The TPS22810 is active high device, and EN/UVLO pin must not be left

floating. A shorting jumper must be installed on J1 (CH1)/J5 (CH2) in the 2-3 position.

3.3.1 On-Resistance (RON) Test Setup

Figure 2 shows the typical setup for measuring on-resistance for CH1. The voltage drop across the switch

is measured using the sense connections (VIN1_SENSE, VOUT1_SENSE), and this can be divided by the

load current to calculate the RON resistance.

Figure 2. RON Measurement Test Setup

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General Configurations

SLVUAY7B–November 2016–Revised January 2018

TPS22810 Load Switch Evaluation Module

3.3.2 Rise Time Test Setup

Use the following instructions to measure the rise time of the TPS22810 for CH1 (CH2):

1. Uninstall jumper J1 (J5).

2. Set the load resistance to 12 Ωat terminal T2 (T4) and input supply voltage to 12 V at terminal T1

(T3). Enable the power supply and the load.

3. Apply a square wave (10-Hz frequency with 50% duty cycle) to the EN/UVLO pin at TP6 (TP14) of the

load switch using a function generator.

4. Observe the waveform at VOUT1, TP4 (TP12) with an oscilloscope to measure the slew rate and rise

time of the load switch with a given input voltage of 12 V.

5. Change the default 22-nF CT capacitor C4 (C8) to vary the output voltage rise time.

Figure 3 shows an example of a rise time measurement taken on the TPS22810EVM.

Figure 3. TPS22810 VOUT Rise Profile (VIN = 12 V, CT = 22 nF, COUT = 10 µF, RL= 12 Ω)

3.3.3 Quick Output Discharge (QOD) Test Setup

Use the following instructions to measure the VOUT fall time of the TPS22810 for CH1 (CH2):

1. Uninstall jumper J2 (J6) to set QOD = OPEN

2. Set the load resistance to 1000 Ωat terminal T2 (T4) and input supply voltage to 12 V at terminal T1

(T3). Enable the power supply and the load.

3. Apply a square wave (5-Hz frequency with 50% duty cycle) to the EN/UVLO pin at TP6 (TP14) of the

load switch using a function generator.

4. Observe the waveform at VOUT1, TP4 (TP12) with an oscilloscope to measure the fall time of the load

switch.

5. Change the jumper J2 (J6) setting to 1-2 position, which sets 511-Ωexternal resistance in series with

the QOD pin. Observe the waveform at VOUT1, TP4 (TP12).

6. Change the jumper J2 (J6) setting to 5-6 position to set QOD = VOUT. Observe the waveform at

VOUT1, TP4 (TP12).

General Configurations

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TPS22810 Load Switch Evaluation Module

Figure 4. TPS22810 VOUT Fall Profile With QOD = OPEN (VIN = 12 V, CT = 22 nF, COUT = 10 µF,

RL= 1000 Ω)

Figure 5. TPS22810 VOUT Fall Profile With External Discharge Resistor of 511 Ω(VIN = 12V, CT = 22 nF,

COUT = 10 µF, RL = 1000 Ω)

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General Configurations

SLVUAY7B–November 2016–Revised January 2018

TPS22810 Load Switch Evaluation Module

Figure 6. TPS22810 VOUT Fall Profile With QOD = VOUT (VIN = 12 V, CT = 22 nF, COUT = 10 µF, RL =

1000 Ω)

EVM Board Assembly Drawings and Layout Guidelines

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4 EVM Board Assembly Drawings and Layout Guidelines

4.1 PCB Drawings

Figure 7 shows component placement of the EVM and Figure 8 and Figure 9 show PCB layout images.

Figure 7. Top Side Placement Figure 8. Top Layer

Figure 9. Bottom Layer

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Bill Of Materials (BOM)

SLVUAY7B–November 2016–Revised January 2018

TPS22810 Load Switch Evaluation Module

5 Bill Of Materials (BOM)

Table 6 lists the EVM BOM.

Table 6. TPS22810EVM Bill of Materials

Designator QTY Value Description Package Reference Part Number Manufacturer

!PCB1 1 Printed Circuit Board HVL178 Any

C1, C5 2 1uF CAP, CERM, 1 µF, 25 V, +/- 10%, X7R, 0805 0805 GRM21BR71E105KA99L Murata

C2, C6 2 0.1uF CAP, CERM, 0.1 µF, 25 V, +/- 10%, X7R, 0805 0805 GRM21BR71E104KA01L Murata

C3, C7 2 10uF CAP, CERM, 10 µF, 25 V, +/- 10%, X7R, 1206 1206 GRM31CR71E106KA12L Murata

C4, C8 2 0.022uF CAP, CERM, 0.022 µF, 50 V, +/- 10%, X7R, 0603 0603 GRM188R71H223KA01D Murata

D1, D2 2 Green LED, Green, SMD LED_0603 150060GS75000 Wurth Elektronik

FID1, FID2, FID3 3 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A

H9, H10, H11, H12 4 Bumpon, Hemisphere, 0.44 X 0.20, Clear Transparent Bumpon SJ-5303 (CLEAR) 3M

J1, J5 2 Header, 100mil, 3x1, Gold, TH PBC03SAAN PBC03SAAN Sullins Connector Solutions

J2, J6 2 Header, 100mil, 3x2, Gold, TH Sullins 100mil, 2x3, 230 mil

above insulator PBC03DAAN Sullins Connector Solutions

J3, J4, J7, J8 4 Header, 100mil, 2x1, Gold, TH Sullins 100mil, 1x2, 230 mil

above insulator PBC02SAAN Sullins Connector Solutions

R1, R6 2 249 RES, 249, 1%, 0.1 W, 0603 0603 CRCW0603249RFKEA Vishay-Dale

R2, R7 2 511 RES, 511, 1%, 0.1 W, 0603 0603 CRCW0603511RFKEA Vishay-Dale

R3, R8 2 47k RES, 47 k, 5%, 0.1 W, 0603 0603 CRCW060347K0JNEA Vishay-Dale

SH-J1, SH-J2, SH-J3,

SH-J4, SH-J5, SH-J6,

SH-J7, SH-J8 8 1x2 Shunt, 100mil, Flash Gold, Black Closed Top 100mil Shunt SPC02SYAN Sullins Connector Solutions

T1, T2, T3, T4 4 Terminal Block, 2x1, 5.08mm, TH 10.16x15.2x9mm 282841-2 TE Connectivity

TP1, TP2, TP3, TP4,

TP5, TP6, TP7, TP8,

TP9, TP10, TP11,

TP12, TP13, TP14,

TP15, TP16

16 Test Point, Miniature, SMT Test Point, Miniature, SMT 5019 Keystone

U1 1 18-V, 79-mohm¸ On-Resistance Load Switch, DBV0006A DBV0006A TPS22810DBV Texas Instruments

U2 1 18-V, 79-mohm¸ On-Resistance Load Switch, DRV0006A DRV0006A TPS22810DRV Texas Instruments

R4, R9 0 562k RES, 562 k, 1%, 0.1 W, 0603 0603 RC0603FR-07562KL Yageo America

R5, R10 0 100k RES, 100 k, 1%, 0.1 W, 0603 0603 RC0603FR-07100KL Yageo America

Revision History

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Revision History

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

Changes from A Revision (April 2017) to B Revision .................................................................................................... Page

• Added note regarding TPS22810-Q1 evaluation after Table 1...................................................................... 1

Changes from Original (November 2016) to A Revision ................................................................................................ Page

• Added TPS22810DRV to specifications in Table 1................................................................................... 1

• Split out the continuous current bullets for the two devices in the Features section. ............................................ 1

• Changed VOUT2 from 2A to 3A on the TPS22810DRV schematic. ............................................................... 2

• Changed output current limit from 0 to 2 A, to 0 to 3 A. ............................................................................. 3

• Deleted EVM rating sentence stating 2-A maximum continuous current in the Test Configurations section. ................ 4

• Deleted 2 A from the U1 and U2 Description column in the BOM.................................................................. 9

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