Texas Instruments TPS548B28EVM-023 Manuel utilisateur

SNVU662–June 2020

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

User's Guide

SNVU662–June 2020

TPS548B28EVM-023 20-A, Buck Converter Evaluation

Module

This user’s guide contains information for the TPS548B28EVM-023 evaluation module (EVM) as well as

for the TPS548B28 DC/DC converter. Also included are the performance specifications, the schematic,

and the list of materials for the TPS548B28EVM.

Contents

1 Introduction ................................................................................................................... 1

1.1 Background.......................................................................................................... 2

1.2 Performance Specification Summary ............................................................................ 2

1.3 Modifications......................................................................................................... 3

2 Schematic, List of Materials, and Layout ................................................................................. 5

2.1 Schematic............................................................................................................ 6

2.2 List of Materials ..................................................................................................... 7

2.3 Layout ................................................................................................................ 8

List of Figures

1 Safety Warnings ............................................................................................................. 2

2 TPS548B28EVM Top-Side Layout ........................................................................................ 9

3 TPS548B28EVM Internal Layer-1 Layout ................................................................................ 9

4 TPS548B28EVM Internal Layer-2 Layout............................................................................... 10

5 TPS548B28EVM Bottom-Side Layout................................................................................... 10

List of Tables

1 Input Voltage and Output Current Summary............................................................................. 2

2 TPS548B28EVM Performance Specification Summary ................................................................ 2

3 TPS548B28EVM Mode Pin Selection..................................................................................... 4

4 Enable Pin Selection ........................................................................................................ 4

5 TPS548B28EVM List of Materials......................................................................................... 7

Trademarks

D-CAP3 is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

1 Introduction

The TPS548B28 is a D-CAP3™ synchronous buck converter designed for 20 A output current, and the

evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved

when designing with the device. The high-side and low-side switching MOSFETs are integrated in the

device package along with their gate drive circuitry. Rated input voltage and output current ranges for the

evaluation module are given in Table 1.

Introduction

www.ti.com

2SNVU662–June 2020

Submit Documentation Feedback

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

1.1 Background

The EVM is setup to allow the user to evaluate the performance of the TPS548B28 IC, and easily make

changes to multiple settings. The low drain-to-source on resistance of the MOSFETs allows the device to

achieve high efficiencies and keep the junction temperature low at high output currents. There is no need

for external compensation components since this device is designed with D-CAP3™ control topology. On

the EVM the switching frequency and the operation mode are externally selectable using a jumper to set

the resistor from the MODE pin to AGND. An external resistor divider allows for an adjustable output

voltage. Additionally, the device provides adjustable soft start, adjustable OC limit threshold, external

reference input, and an open-drain power good indicator. Lastly the TPS548B28 device has a fixed

internal VIN under voltage lockout and externally adjustable UVLO using a resistor divider at the EN pin.

Table 1. Input Voltage and Output Current Summary

EVM INPUT VOLTAGE RANGE OUTPUT CURRENT

RANGE

TPS548B28 VIN = 8 V to 14 V 0 A to 20 A

Figure 1. Safety Warnings

1.2 Performance Specification Summary

A summary of the TPS548B28EVM performance specifications is provided in Table 2. Specifications are

given for an input voltage of VIN = 12 V and an output voltage of 1.0 V, unless otherwise specified. The

TPS548B28EVM is designed and tested for VIN = 8 V to 14 V. The ambient temperature is 25°C for all

measurements, unless otherwise noted. The design can be modified to perform over 4 V to 16 V.

Table 2. TPS548B28EVM Performance Specification Summary

SPECIFICATION TEST CONDITIONS MIN TYP MAX Unit

VIN voltage range (without internal

Bias) 8 12 14 V

Output voltage setpoint 1.0 V

Output current range VIN = 8 V to 14 V 0 20 20 A

Internal LDO Voltage 3.0 V

Operating frequency 800 kHz

O INTREF

FB HS FB LS

INTREF

V V

R R

_ _



www.ti.com

Introduction

SNVU662–June 2020

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

1.3 Modifications

These evaluation modules are designed to provide access to the features of the TPS548B28. Some

modifications can be made to this module.

1.3.1 Output Voltage Setpoint

To change the output voltage of the EVM, it is necessary to change the value of resistor R6 and R7. R9 is

fixed at 10 kΩ. Changing the total value of R6 plus R7 can change the output voltage above the 0.6V

reference voltage VINTREF. A two resistor configuration of R6+R7 is implemented to give the exact desired

output voltage setting. The value of R6 and R7 for a specific output voltage can be calculated using

Equation 1.

(1)

VINTREF= 0.6V

RFB_HS = R6+ R7

RFB_LS = R9= 10kΩ

Introduction

www.ti.com

4SNVU662–June 2020

Submit Documentation Feedback

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

1.3.2 Frequency and Operation Mode Setting

To change the frequency and operation mode of the part, the MODE pin is used. J6 and the surrounding

circuitry allows for an easy change to the frequency and operation mode setting. All 6 options offered by

J6 are shown in Table 3

Table 3. TPS548B28EVM Mode Pin Selection

Switching Frequency (FSW)Operation Mode Under

Light Load Mode Pin Connections

Connection Jumper Setting

600 kHz Skip Mode Short to VCC Short Pins 1 and 2

800 kHz Skip Mode 243kΩ±10% to AGND Short Pins 3 and 4

1000 kHz Skip Mode 121kΩ±10% to AGND Short Pins 5 and 6

1000 kHz Forced CCM 60.4kΩ±10% to AGND Short Pins 7 and 8

800 kHz Forced CCM 30.1kΩ±10% to AGND Short Pins 9 and 10

600 kHz Forced CCM Short to AGND Short Pins 11 and 12

1.3.3 Enable Pin Selection

The converter can be enabled and disabled by J5.

Default setting: EN pin connected to VIN.

Table 4. Enable Pin Selection

Set On Connection Enable Selection

Pins 2-3 Shorted EN pin connected to VIN pins through resistor divider

J3 Open EN pin is left floating

Pins 1-2 Shorted EN pin connected to PGND

1.3.4 Remote Sensing

The EVM is not set-up for remote sensing by default. To set up remote sensing follow these steps:

1. Replace R8 and R11 with 100Ωresistors

2. Connect your sense points to the Vsns+ and Vsns- test points

1.3.5 Adjustable UVLO

The undervoltage lockout (UVLO) can be adjusted externally using R2 and R9. See the TPS548B28 Data

Sheet to get detailed instructions for setting the external UVLO.

www.ti.com

Schematic, List of Materials, and Layout

SNVU662–June 2020

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

2 Schematic, List of Materials, and Layout

This section provides a schematic, a description of the TPS548B28EVM board layout, and layer

illustrations.

Schematic, List of Materials, and Layout

www.ti.com

6SNVU662–June 2020

Submit Documentation Feedback

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

2.1 Schematic

The following image illustrates the schematic for the TPS548B28EVM.

www.ti.com

Schematic, List of Materials, and Layout

SNVU662–June 2020

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

2.2 List of Materials

Table 5 presents the list of materials for the TPS548B28EVM.

Table 5. TPS548B28EVM List of Materials

DES QTY DESCRIPTION PART NUMBER MANUFACTURER

C2 1 CAP, AL, 330 uF, 25 V, ±20%, 0.15 ohm, SMD, 330uF EEE-FC1E331P Panasonic

C3, C4, C5,

C6, C21,

C22

6 CAP, CERM, 22 uF, 25 V, ±20%, X6S, 1206_190 GRM31CC81E226ME11L MuRata

C7, C8,

C32, C33 4 CAP CER 1UF 25V X6S 0402 GRM155C81E105KE11D Murata

C9 1 CAP, CERM, 0.1 uF, 50 V, ±10%, X7R, AEC-Q200 Grade 1, 0603 CGA3E2X7R1H104K080A

ATDK

C10 1 CAP, CERM, 2.2 uF, 10 V, ±10%, X7R, 0603 GRM188R71A225KE15D MuRata

C13, C14,

C15, C16,

C26, C27,

C28, C29

8 CAP, CERM, 47 uF, 6.3 V, ±10%, X6S, 1206 GRM31CC80J476KE18L MuRata

C19 1 CAP, CERM, 0.22 uF, 16 V, ±10%, X7R, 0603 C1608X7R1C224K080AC TDK

L1 1 Inductor, Shielded, Composite, 300 nH, 33.4 A, 0.00106 ohm, SMD XAL7070-301MEB Coilcraft

R1, R17 2 RES, 0, 1%, 0.5 W, 1206 5108 Keystone

R2, R7, R11 3 RES, 0, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 RMCF0603ZT0R00 Stackpole Electronics Inc

R3, R12 2 RES, 30.1 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW060330K1FKEA Vishay-Dale

R4 1 RES, 20.0 k, 0.1%, 0.1 W, 0603 RT0603BRD0720KL Yageo America

R5 1 RES, 6.04 k, 1%, 0.1 W, 0603 CRCW06036K04FKEA Vishay-Dale

R6 1 RES, 6.65 k, 1%, 0.1 W, 0603 'RC0603FR-076K65L Yageo

R8 1 RES, 10.0, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW060310R0FKEA Vishay-Dale

R9, R10 2 RES, 10.0 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW060310K0FKEA Vishay-Dale

R13 1 RES, 60.4 k, 1%, 0.1 W, 0603 RC0603FR-0760K4L Yageo

R14 1 RES, 121 k, 1%, 0.1 W, 0603 RC0603FR-07121KL Yageo

R15 1 RES, 243 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW0603243KFKEA Vishay-Dale

U1 1 4-V to 16-V Input, 20-A Single Synchronous Step-Down Converter,

RWW0021A (VQFN-HR-21) TPS548B28RWWT Texas Instruments

Schematic, List of Materials, and Layout

www.ti.com

8SNVU662–June 2020

Submit Documentation Feedback

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

2.3 Layout

The board layout for the TPS548B28EVM is shown in Figure 2 through Figure 5. The top-side layer of the

EVM is laid out in a manner typical of a user application. The top, bottom, and internal layers are 2-oz.

copper.

The top layer contains the main power traces for VIN, VOUT, and SW. Also on the top layer are connections

for the remaining pins of the TPS548B28 and the majority of the signal traces. The top layer has a

dedicated ground plane for quiet analog ground that is connected to the main power ground plane at a

single point. The internal layer-1 is a large ground plane. The internal layer-2 contains an additional large

ground copper area as well as an additional VOUT copper fill. The bottom layer is another ground plane

with two additional traces for the output voltage feedback and various signals routed to test points and

headers. There are also additional VIN and VOUT planes on the bottom layer. The top-side ground traces

are connected to the bottom and internal ground planes with multiple via groupings placed around the

board.

The input decoupling capacitors and bootstrap capacitor are all located as close to the IC as possible.

Additionally, the voltage set point resistor divider components are kept close to the IC. The voltage divider

network ties to the output voltage at the point of regulation, the copper VOUT trace at the TP4 test point. An

additional input bulk capacitor is used to limit the noise entering the converter from the input supply.

Critical analog circuits that are noise sensitive are terminated to the quiet analog ground island on the top

layer.

www.ti.com

Schematic, List of Materials, and Layout

SNVU662–June 2020

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

Figure 2. TPS548B28EVM Top-Side Layout

Figure 3. TPS548B28EVM Internal Layer-1 Layout

Schematic, List of Materials, and Layout

www.ti.com

10 SNVU662–June 2020

Submit Documentation Feedback

TPS548B28EVM-023 20-A, Buck Converter Evaluation Module

Figure 4. TPS548B28EVM Internal Layer-2 Layout

Figure 5. TPS548B28EVM Bottom-Side Layout

Table des matières

Autres manuels Texas Instruments Carte mère

Texas Instruments

Texas Instruments DS560MB410EVM Manuel utilisateur

Texas Instruments

Texas Instruments INA253EVM Manuel utilisateur

Texas Instruments

Texas Instruments DRV821 EVM Series Manuel utilisateur

Texas Instruments

Texas Instruments BQ25303J Manuel utilisateur

Texas Instruments

Texas Instruments EK-LM4F232 Manuel utilisateur

Texas Instruments

Texas Instruments ADS1x9xECG-FE Manuel utilisateur

Texas Instruments

Texas Instruments DRV814x-Q1EVM Manuel utilisateur

Texas Instruments

Texas Instruments MCF8315A Manuel utilisateur

Texas Instruments

Texas Instruments ADC 120EVM-PDK Series Manuel utilisateur

Texas Instruments

Texas Instruments TRF4903 Manuel utilisateur

Texas Instruments

Texas Instruments LAUNCHXL-F28377S Manuel utilisateur

Texas Instruments

Texas Instruments TPD1E01B04 Manuel utilisateur

Texas Instruments

Texas Instruments AWR2944 Manuel utilisateur

Texas Instruments

Texas Instruments DRV8801EVM Manuel utilisateur

Texas Instruments

Texas Instruments ADS5560EVM Manuel utilisateur

Texas Instruments

Texas Instruments INA226EVM Manuel utilisateur

Texas Instruments

Texas Instruments ADC16DX370EVM Manuel utilisateur

Texas Instruments

Texas Instruments DRV88 Series Manuel utilisateur

Texas Instruments

Texas Instruments TPS40400EVM-351 Manuel utilisateur

Texas Instruments

Texas Instruments TAS6424-Q1 Manuel utilisateur

Texas Instruments

Texas Instruments LMH1297 Manuel utilisateur

Texas Instruments

Texas Instruments ADS7057 Manuel utilisateur

Texas Instruments

Texas Instruments TPS54225 Manuel utilisateur

Texas Instruments

Texas Instruments TPA3004D2EVM Manuel utilisateur

Manuels Carte mère populaires d'autres marques

DFI

DFI SD170 Manuel utilisateur

ASROCK

ASROCK ROMED8-2T Manuel utilisateur

Asus

Asus P2L97A Manuel utilisateur

Winmate

Winmate IC70 Manuel utilisateur

Asus

Asus MES-B Manuel utilisateur

Grantech

Grantech SYS8F377VGGA-3OMN Manuel utilisateur

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuel utilisateur

Gigabyte

Gigabyte GA-9IVDT Manuel utilisateur

Commell

Commell MS-C73 Manuel utilisateur

IBT Technologies

IBT Technologies MB860 Manuel utilisateur

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuel utilisateur

Biostar

Biostar M7VIT Bravo Instructions d'utilisation et d'installation

Intel

Intel D33217CK Manuel utilisateur

Asus

Asus F1A55-M LX PLUS R2.0 Manuel utilisateur

EPC

EPC EPC9147C Manuel utilisateur

Asus

Asus EX-B760M-V5 D4 Manuel utilisateur

EPOX

EPOX MU-8KHA0010 Manuel utilisateur

Ski-Doo

Ski-Doo Bombardier MPEM 219 700 090 Manuel utilisateur