Texas Instruments TPS254900AQ1EVM-003 User manual

SLVUB94–October 2017

TPS254900AQ1EVM-003 Evaluation Module

User's Guide

SLVUB94–October 2017

TPS254900AQ1EVM-003 Evaluation Module

This user’s guide describes the evaluation module (EVM) for the TPS254900A-Q1 (TPS254900AQ1EVM-

003). The TPS254900A-Q1 is a USB charging port controller with an integrated power switch and USB 2.0

high-speed data line (DP and DM) switches.

Contents

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

2 Description.................................................................................................................... 2

3 Schematic..................................................................................................................... 3

4 General Configuration and Description ................................................................................... 4

5 EVM Assembly Drawings and Layout Guidelines ....................................................................... 6

6 Bill of Materials............................................................................................................... 9

List of Figures

1 TPS254900AQ1EVM-003 Schematic..................................................................................... 3

2 Typical TPS254900AQ1EVM-003 Test Setup........................................................................... 5

3 Top Side Placement......................................................................................................... 6

4 Top Side Routing ............................................................................................................ 6

5 Layer Two Routing .......................................................................................................... 6

6 Layer Three Routing ........................................................................................................ 6

7 Bottom Side Routing ........................................................................................................ 7

8 Bottom Side Placement..................................................................................................... 7

List of Tables

1 Connector Functionality..................................................................................................... 4

2 Test Points.................................................................................................................... 4

3 Jumpers....................................................................................................................... 4

4 TPS254900AQ1EVM-003 Bill of Materials ............................................................................... 9

Trademarks

All trademarks are the property of their respective owners.

Introduction

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1 Introduction

The TPS254900AQ1EVM-003 allows reference circuit evaluation of TI's TPS254900A-Q1 automotive USB

charging port controller with integrated power switch, cable compensation, and short-to-battery protection.

The TPS254900AQ1EVM-003 provides the electrical signatures on DP_IN and DM_IN to support all

current charging schemes. The TPS254900A-Q1 incorporates USB cable voltage drop compensation by

linearly sensing the port current and automatically adjusting the output voltage of the LMR14030SDDAR to

keep the cable end device voltage within the normal operating range. The TPS254900A-Q1 incorporates

up to an 18-V short to battery protection for VBUS, DP_IN and DM_IN.

1.1 Features

The EVM supports the following features:

• TPS254900A-Q1 built-in IEC 61000-4-2 ESD protection on DP_IN and DM_IN pins

• Linear USB cable voltage droop compensation

• The TPS254900A-Q1 is fully AEC Q100 qualified

• Built-in short to battery protection and notification on VBUS, DP_IN and DM_IN

• LMR14030SDDAR high-performance 2.2-MHz automotive-qualified DC/DC converter

1.2 Applications

The EVM can be used in the following applications:

• Automotive infotainment system

• Automotive USB charging box

2 Description

The TPS254900AQ1EVM-003 enables full evaluation of the TPS254900A-Q1 device. Refer to the

schematic in Figure 1. An automotive voltage range input is applied at the J1 connector. The input voltage

is regulated by the LMR14030SDDAR buck regulator (U1) and associated circuitry. This provides a

nominal 5-V, 3-A output at +5 VDC for the TPS254900A-Q1 (U2).

The TPS254900A-Q1 internal power switch connects +5 VDC furnished by the LMR14030SDDAR regulator

to VBUS at the downstream facing USB connector, J5. When the internal power switch is ON, the D6 LED

(green) illuminates. USB 2.0 data can be passed through the TPS254900AQ1EVM-003 from J5 to J4

when the TPS254900A-Q1 is configured for either SDP or CDP mode using the J6 header. The

TPS254900A-Q1 status and fault conditions can be detected using the D3 (blue) and D2 (red) LEDs,

respectively.

The TPS254900A-Q1 provides system-level ESD protection in accordance with IEC 61000-4-2 up to ±8-

kV contact and ±15-kV air discharge at the DP_IN and DM_IN signals going to J5. These pins as well as

VBUS pin will also provide detection of shorts to the battery by triggering the FAULT logic and illuminating

D2.

The TPS254900A-Q1 provides USB cable voltage droop compensation at the load through the use of the

CS pin. Sinking current into the CS pin mirrors the current through the TPS254900A-Q1 power switch at a

rate of 82 µA/A. The CS pin current is summed with the LMR14030SDDAR regulator feedback current

through R1 causing the voltage at +5 VDC to change with USB downstream load current. The +5 VDC

increases linearly as load current increases. This compensation will keep the load end voltage close to 5

VDC. The default compensation resistor values (R1 and R4) target a USB cable resistance of 200 mΩ.

Refer to the TPS254900A-Q1 data sheet for more information.

The TPS254900A-Q1 provides a current detection function through the use of the IMON pin. Connect a

resistor between IMON and GND. The system can detect the load current in real time by monitoring the

IMON voltage.

GND

GND D1

GND GND GND

VBAT

GND

TP2

GND

TP1

10µH

VBUS 1

D- 2

D+ 3

GND 4

VBUS

D-

D+

GND

5V @ 2.4A

GND

1 2

3 4

5 6

7 8

10uF

16V

TP7 TP8

10µF

16V

C15

Red

Blue

Green

18V

DM_OUT

DP_OUT

5VDC

0.022µF

16V

0.1µF

16V

C13

0.1µF

50V

C16

19.1k

R16

80.6k

R17

63.4k

0.022µF

16V

0.1µF

50V

2.55k

R18

29.4k

1.0k

3.0k

R12

18V

5.1k

R10

47µF

16V

47µF

16V

10µF

50V

CS TP3 TP4

GND

0.1µF

16V

100kR11

100kR14

100kR15

100kR19

10µF

C11 47µF

35V

DNP

DP_IN

DM_IN

DP_IN

2.2µF

C10

TP11 TP10

TP9

12V @ 1A

GND

BOOT 1

VIN

RT/SYNC

FB 5

6GND 7

SW 8

PAD 9

LMR14030SDDAR

IMON 1

DM_OUT

DP_OUT

CTL1

CTL2

OVP_SEL

10 GND 11

DP_IN 13

DM_IN 14

OUT 15

STATUS

17 FAULT

OUT 16

ILIM_LO 19

ILIM_HI 20

BIAS 12

PAD 21

TPS254900IRVCRQ1

15k

2.67k

5.62k

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Schematic

SLVUB94–October 2017

TPS254900AQ1EVM-003 Evaluation Module

3 Schematic

Figure 1 illustrates the EVM schematic.

Figure 1. TPS254900AQ1EVM-003 Schematic

General Configuration and Description

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4 General Configuration and Description

4.1 Physical Access

Table 1 lists the TPS254900AQ1EVM-003 connector functionality, Table 2 describes the test point

availability and Table 3 describes the jumper functionality.

Table 1. Connector Functionality

Connector Label Description

J5 J5 Downstream facing USB 2.0 connector. Connect to the USB 2.0 slave for

data pass through from J4. USB output power is also provided to the slave.

J4 J4 Upstream facing USB 2.0 connector. Connect to the USB 2.0 host for data

pass through to J5. USB input power can also be provided by the host

when the J3 shunt is installed.

J1 J1 Automotive input voltage range connector. Connect to a 7 V–18 V, 1.5-A

voltage source according to the polarity marked on the EVM.

D2 (RED) D2 TPS254900A-Q1 FAULT output is triggered

D3 (BLUE) D3 TPS254900A-Q1 STATUS output is triggered

D6 (GREEN) D6 TPS254900A-Q1 output powered

Table 2. Test Points

Test Point Color Label Description

TP1 SM-L VDC TPS254900A-Q1 power switch input from DC-DC converter

TP2 SM-L CS Loop injection point

TP3 SM-L GND GND Test point

TP4 SM-L GND GND Test point

TP7 SM-L STATUS TPS254900A STATUS pin test point

TP8 SM-L FAULT TPS254900A FAULT pin test point

TP9 SM-L VIN TPS254900A VIN pin test point

TP10 SM-L OUT TPS254900A VBUS pin test point

TP11 SM-L IMON TPS254900A IMON pin test point

Table 3. Jumpers

Jumper Label Description

J2 J2 Install to power TPS254900A-Q1 with a DC/DC

J3 J3 USB host furnished input voltage. Install to power TPS254900A-Q1 with a USB

host.

J6 J6 TPS254900A-Q1 mode select jumper block. Install shunt at EN (1-2) to disable

TPS254900A-Q1. C1, C2, OVP_SEL positions select the charging mode for

TPS254900A-Q1. Refer to the data sheet for more information.

PSIL003

7" Twisted Pair, #20AWG

TP4

VIN

Resistor Load

TP10

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General Configuration and Description

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TPS254900AQ1EVM-003 Evaluation Module

4.2 Test Setup

Figure 2 shows a typical test setup for TPS254900AQ1EVM-003. Connect J1 to the 14-V power supply.

The TPS254900A-Q1 output load can be applied either between TP10 and TP4 or via the USB 2.0 cable

plugged into J5.

Figure 2. Typical TPS254900AQ1EVM-003 Test Setup

EVM Assembly Drawings and Layout Guidelines

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5 EVM Assembly Drawings and Layout Guidelines

5.1 PCB Drawings

Figure 3 through Figure 8 show component placement and layout of the EVM.

Figure 3. Top Side Placement Figure 4. Top Side Routing

Figure 5. Layer Two Routing Figure 6. Layer Three Routing

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EVM Assembly Drawings and Layout Guidelines

SLVUB94–October 2017

TPS254900AQ1EVM-003 Evaluation Module

Figure 7. Bottom Side Routing Figure 8. Bottom Side Placement

EVM Assembly Drawings and Layout Guidelines

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5.2 Layout Guidelines

Use the following layout guidelines:

•TPS254900A-Q1 placement: Place the TPS254900A-Q1 near the USB output connector and OUT pin

filter capacitors. Connect the exposed pad to the GND pin and the system ground plane using an array

of vias.

• IN pin bypass capacitance: Place the 0.1-μF bypass capacitor near the IN pin and make the

connection using a low inductance trace.

•DP-OUT, DM-OUT and DP-IN, DM-IN traces: Route these traces as controlled impedance differential

pairs per the USB-2.0 specification. Minimize the use of vias in the high-speed data lines. Figure 7

provides a good signal routing example for the high-speed data traces. In this example, the data pairs

are routed as edge-coupled microstrips with nominal differential impedance of 90 Ω. The reference

plane is tied to GND and is shown in Figure 6. Ensure that the reference plane is void of cuts or splits

above the differential pairs to prevent impedance discontinuities.

•ILIM_LO and ILIM_HI pin connections: Current-limit, set-point accuracy can be compromised by

stray current leakage from a higher voltage source to the ILIM_LO or ILIM_HI pins. Ensure that there is

adequate spacing between IN pin copper/trace and ILIM_LO pin trace to prevent contaminant buildup

during the PCB assembly process.

• The capacitor on BIAS helps improve IEC ESD performance, a 2.2-µF capacitor should be placed

close to BIAS and the whole “current” path from BIAS to GND across this capacitor should be as short

as possible. Do not use a via along the connection traces.

• A 10-µF output capacitor should be placed close to the OUT pin and TVS.

5.3 EMI Containment

EMI containment methods are shown in the following list:

• Use compact loops for dv/dt and di/dt circuit paths (power loops and gate drives)

• Use minimal, yet thermally adequate, copper areas for heat sinking of components tied to switching

nodes (minimize exposed radiating surface).

• Use copper ground planes (possible stitching) and top-layer copper floods (surround circuitry with

ground floods)

• Use a 4-layer PCB, if economically feasible (for better grounding)

• Minimize the amount of copper area associated with input traces (to minimize radiated pickup)

• Maintain physical separation between input-related circuitry and power circuitry (use ferrite beads as

boundary line)

• Possible use of common-mode inductors

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Bill of Materials

SLVUB94–October 2017

TPS254900AQ1EVM-003 Evaluation Module

6 Bill of Materials

Table 4 lists the EVM bill of materials.

(1) Unless otherwise noted in the Alternate Part Number or Alternate Manufacturer columns, all parts may be substituted with equivalents.

Table 4. TPS254900AQ1EVM-003 Bill of Materials(1)

Designator QTY Value Description Package Reference Part Number Manufacturer Alternate Part

Number Alternate

Manufacturer

!PCB 1 Printed Circuit Board PSIL003 Any - -

C1, C13, C16 3 0.1uF CAP, CERM, 0.1 µF, 16 V, +/- 10%, X7R, 0603 0603 GRM188R71C104KA01D Murata

C2 1 10uF CAP, CERM, 10 µF, 50 V, +/- 10%, X5R, 1210 1210 C3225X5R1H106K250AB TDK

C3 1 0.1uF CAP, CERM, 0.1 µF, 50 V, +/- 10%, X7R, 0603 0603 GRM188R71H104KA93D Murata

C4, C5 2 47uF CAP, CERM, 47 µF, 16 V, +/- 20%, X5R, 1210 1210 GRM32ER61C476ME15L Murata

C6, C7 2 0.022uF CAP, CERM, 0.022 µF, 16 V, +/- 10%, X7R, 0603 0603 C0603C223K4RACTU Kemet

C8, C15 2 10uF CAP, CERM, 10 µF, 16 V, +/- 10%, X7R, 1206 1206 GRM31CR71C106KAC7L Murata

C10 1 2.2uF CAP, CERM, 2.2 µF, 50 V, +/- 10%, X5R, 0603 0603 GRM188R61H225KE11D Murata

C11 1 10uF CAP, CERM, 10 µF, 35 V, +/- 10%, X7R, 1210 1210 GRM32ER7YA106KA12L Murata

D1 1 50V Diode, Schottky, 50 V, 3 A, SMA SMA B350A-13-F Diodes Inc.

D2 1 Red LED, Red, SMD SMD, 2-Leads, Body

1.3x0.8mm LS L29K-G1J2-1-Z OSRAM

D3 1 Blue LED, Blue, SMD BLUE 0603 LED LB Q39G-L2N2-35-1 OSRAM

D4, D5 2 18V Diode, TVS, Uni, 18 V, 400 W, SMA SMA SMAJ18A Littelfuse

D6 1 Green LED, Green, SMD 0.8x1.6mm HSMG-C190 Avago

J1 1 Conn Term Block, 2POS, 3.5mm, TH 11x8.5x7.3mm 1751248 Phoenix Contact

J2, J3 2 Header, 100mil, 2x1, Tin, TH Header, 2 PIN, 100mil,

Tin PEC02SAAN Sullins Connector

Solutions

J4 1 Connector, Plug, USB Type A, R/A, Top Mount SMT USB Type A right angle 48037-1000 Molex

J5 1 Connector, Receptacle, USB TYPE A, R/A, Top Mount

SMT USB TYPE A

CONNECTOR

RECEPTACLE 4POS

SMD

896-43-004-00-000000 Mill-Max

J6 1 Header, 100mil, 4x2, Tin, TH Header, 4x2, 100mil, Tin PEC04DAAN Sullins Connector

Solutions

L1 1 10uH Inductor, Shielded Drum Core, Powdered Iron, 10 µH, 3 A,

0.075 ohm, SMD Inductor, 6.6x3x6.6mm 74437346100 Wurth Elektronik eiSos

R1 1 2.67k RES, 2.67 k, 1%, 0.1 W, 0603 0603 CRCW06032K67FKEA Vishay-Dale

R2 1 0 RES, 0, 5%, 0.1 W, 0603 0603 CRCW06030000Z0EA Vishay-Dale

R3 1 63.4k RES, 63.4 k, 1%, 0.1 W, 0603 0603 RC0603FR-0763K4L Yageo America

R4 1 29.4k RES, 29.4 k, 1%, 0.1 W, 0603 0603 CRCW060329K4FKEA Vishay-Dale

R5 1 5.62k RES, 5.62 k, 1%, 0.1 W, 0603 0603 CRCW06035K62FKEA Vishay-Dale

R6, R7 2 1.0k RES, 1.0 k, 5%, 0.1 W, 0603 0603 CRCW06031K00JNEA Vishay-Dale

R8, R9 2 15k RES, 15 k, 5%, 0.1 W, 0603 0603 CRCW060315K0JNEA Vishay-Dale

R10 1 5.1k RES, 5.1 k, 5%, 0.1 W, 0603 0603 CRCW06035K10JNEA Vishay-Dale

R11, R14, R15, R19 4 100k RES, 100 k, 1%, 0.1 W, 0603 0603 RC0603FR-07100KL Yageo America

R12 1 3.0k RES, 3.0 k, 5%, 0.1 W, 0603 0603 CRCW06033K00JNEA Vishay-Dale

R16 1 19.1k RES, 19.1 k, 1%, 0.1 W, 0603 0603 CRCW060319K1FKEA Vishay-Dale

Bill of Materials

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Table 4. TPS254900AQ1EVM-003 Bill of Materials(1) (continued)

Designator QTY Value Description Package Reference Part Number Manufacturer Alternate Part

Number Alternate

Manufacturer

R17 1 80.6k RES, 80.6 k, 1%, 0.1 W, 0603 0603 CRCW060380K6FKEA Vishay-Dale

R18 1 2.55k RES, 2.55 k, 1%, 0.1 W, 0603 0603 CRCW06032K55FKEA Vishay-Dale

SH-J2, SH-J3 2 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M SNT-100-BK-G Samtec

TP1, TP2, TP3, TP4, TP7, TP8,

TP9, TP10, TP11 9 SMT Test Point, Miniature, SMT Testpoint_Keystone_Mini

ature 5015 Keystone

U1 1 SIMPLE SWITCHER 40 V 3.5 A, 2.2 MHz Step-Down

Converter with 40 uA IQ, DDA0008E DDA0008E LMR14030SDDAR Texas Instruments LMR14030SDDA Texas Instruments

U2 1 Automotive USB Charging Port Controller and Power

Switch with Short to BAT protection, RVC0020A RVC0020A TPS254900IRVCRQ1 Texas Instruments TPS254900IRVCTQ1 Texas Instruments

C9 0 47uF CAP, AL, 47 µF, 35 V, +/- 20%, 0.44 ohm, SMD 6.3x5.8 UUD1V470MCL1GS Nichicon

FID1, FID2, FID3, FID4, FID5,

FID6 0 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A

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