Texas Instruments BQ2573 Series Manual de usuario

User’s Guide

BQ2573X Evaluation Module

ABSTRACT

The BQ25730EVM and BQ25731EVM evaluation modules (EVM) are I2C-controlled NVDC-1 buck boost

charger. The input voltage range is between 3.5 V and 26 V, with a programmable output of 1–5 cells and a

charge output current range of 128 mA to 15 A. This EVM does not include the EV2400 interface device. The

EV2400 must be ordered separately to evaluate the BQ2573X EVM.

Table of Contents

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

1.1 EVM Features.................................................................................................................................................................... 2

1.2 General Description........................................................................................................................................................... 2

2 Test Summary......................................................................................................................................................................... 5

2.1 Definitions.......................................................................................................................................................................... 5

2.2 Equipment.......................................................................................................................................................................... 5

2.3 Equipment Setup................................................................................................................................................................6

2.4 Procedure...........................................................................................................................................................................9

3 Bill of Materials, Board Layout, and Schematics...............................................................................................................10

3.1 Bill of Materials.................................................................................................................................................................10

3.2 Board Assembly Layout................................................................................................................................................... 13

3.3 Schematic........................................................................................................................................................................ 19

Revision History.......................................................................................................................................................................21

List of Figures

Figure 2-2. Original Test Setup for BMS051 (BQ2573X EVM).................................................................................................... 7

Figure 2-3. BQ2573X Evaluation Software Main Window........................................................................................................... 8

Figure 2-4. EN_OTG....................................................................................................................................................................9

Figure 3-1. Top Assembly.......................................................................................................................................................... 13

Figure 3-2. Bottom Assembly.................................................................................................................................................... 14

Figure 3-3. PCB Layer 1............................................................................................................................................................ 15

Figure 3-4. PCB Layer 2............................................................................................................................................................ 16

Figure 3-5. PCB Layer 3............................................................................................................................................................ 17

Figure 3-6. PCB Layer 4............................................................................................................................................................ 18

Figure 3-7. BQ25730 EVM Schematic.......................................................................................................................................19

Figure 3-8. BQ25731 EVM Schematic.......................................................................................................................................20

List of Tables

Table 1-1. I/O Description............................................................................................................................................................ 2

Table 1-2. Controls and Key Parameters Setting.........................................................................................................................3

Table 1-3. Recommended Operating Conditions.........................................................................................................................4

Table 3-1. BQ2573X EVM Bill of Materials................................................................................................................................ 10

Trademarks

USB Type-C™ is a trademark of USB Implementer's Forum, Inc..

All trademarks are the property of their respective owners.

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BQ2573X Evaluation Module 1

1 Introduction

1.1 EVM Features

This EVM supports the following features:

• Evaluation module for the BQ2573X devices

• Supports 3.5- to 26-V input source

– 3.5- to 26-V, 0- to 10-A input operating range and 1–5 cell battery configuration

– Supports USB2.0, USB 3.0, USB 3.1 ( USB Type-C™) and USB_PD

– Supports USB OTG with 3- to 24-V adjustable output

– Supports Fast Role Swap (FRS) feature for USB_PD

• Narrow VDC (NVDC) power path management

– Instant-on works with no battery or deeply discharged battery

– Battery supplements system when adapter is fully-loaded

• 400-kHz or 800-kHz switching frequency for high efficiency

• Power Path (BQ25730) or Non Power Path (BQ25731) options

• Power and Current Monitor for CPU Throttling

• Safety

– Thermal shutdown

– Input and system overvoltage protection

– MOSFET overcurrent protection

• Charge status outputs for LED or host processor

• Maximum power tracking capability by input voltage regulation

• Test points for key signals available for testing purposes. Easy probe hook-up.

• Jumpers available. Easy-to-change connections.

1.2 General Description

The BQ2573X evaluation modules are complete charger modules for evaluating an I2C-controlled buck boost

charge using the BQ2573X devices.

The BQ2573X EVM does not include the EV2400 interface board. To evaluate the BQ2573X EVM, order an

EV2400 interface board separately.

The BQ2573X is a synchronous NVDC-1 battery buck boost charge controller, offering a low component count,

high efficiency solution for space-constrained, multi-chemistry battery charging applications.

The BQ2573X charges the battery from a wide range of input sources including a 5-V USB adapter to a high-

voltage USB PD source and traditional adapters.

During power up, the charger sets the converter to buck, boost, or buck-boost configuration based on the input

source and battery conditions. During the charging cycle, the charger automatically transits among buck, boost,

and buck-boost configuration without host control.

The BQ2573X monitors adapter current, battery current, and system power. The flexible programmed

PROCHOT output goes directly to the CPU for throttle back, when needed.

For more details on register functions, see the BQ25730 I2C 1-5 Cell Narrow VDC Buck-Boost Battery Charge

Controller With System Power Monitor and Power Path Control and BQ25731 I2C 1-5 Cell Narrow VDC Buck-

Boost Battery Charge Controller Data Sheets.

Table 1-1 lists the I/O descriptions.

Table 1-1. I/O Description

Jack Description

J1–VIN Input: positive terminal

J1–PGND Input: negative terminal (ground terminal)

J2-CHRG_OK CHRG_OK output

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Table 1-1. I/O Description (continued)

Jack Description

J2-OTG/VAP External OTG/VAP disable pin; Logic LOW to disable OTG/VAP

J2-CELL_CONTROL External battery removal control; Logic high to pull CELL pin down

J2-ILIM_HIZ External converter disable; Logic LOW to enable HIZ mode

J3-SCL SMBUS/I2C SCL

J3-GND Ground

J3–SDA SMBUS/I2C SDA

J4-GND Ground

J4-CMPIN External CMPIN pin input

J4-CMPOUT CMPOUT pin output

J5-VBAT Connected to battery pack output

J5-PGND Ground

J6-VSYS Connected to system output

J6-PGND Ground

J7–SDA SMBUS/I2C SDA

J7-SCL SMBUS/I2C SCL

J7-GND Ground

Table 1-2 displays the controls and key parameters settings.

Table 1-2. Controls and Key Parameters Setting

Jumper Description Factory Setting

JP2 Jumper on: Forward Mode

Jumper off: Enable OTG Installed

JP3

CELL setting

spa1S: JP3(1-2) measure CELL pin voltage 1.2 V

spa2S: JP3(3-4) measure CELL pin voltage 2.7 V

spa3S: JP3(5-6) measure CELL pin voltage 3.9 V

spa4S: JP3(7-8) measure CELL pin voltage 4.2 V

spa5S: JP3(9-10) measure CELL pin voltage 6.0 V

JP3(3-4) installed

JP4 Jumper on: Bat removal

Jumper off: Cell setting by JP3 Not installed

JP6

HIZ Enable

spaJumper on: Enable HiZ mode.

spaJumper off: ILIM is set by external resistor divider

Not installed

JP8 Jumper on: Onboard LDO to drive the EVM 3V3

Jumper off: disconnect onboard LDO to drive the EVM 3V3 Installed

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BQ2573X Evaluation Module 3

Table 1-3 lists the recommended operating conditions.

Table 1-3. Recommended Operating Conditions

Symbol Description MIN TYP MAX Unit

Supply voltage, VIN Input voltage from ac adapter input 3.5 5/12/20 26 V

Battery voltage, VBAT Voltage applied at VBAT terminal 0 23 V

Supply current, IAC

Maximum input current from ac adapter

input 0 10 A

Output current, IOUT Output current 0 15 A

Operating junction temperature

range, TJ

0 125 °C

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2 Test Summary

2.1 Definitions

This procedure details how to configure the BMS051 evaluation board. For the test procedure, the following

naming conventions are followed. Refer to the BMS051 schematic for details.

VXXX: External voltage supply name (VADP, VBT, VSBT).

LOADW: External load name (LOADR, LOADI).

V(TPyyy): Voltage at internal test point TPyyy. For example, V(TP12) means the voltage at TP12.

V(Jxx): Voltage at jack terminal Jxx.

V(TP(XXX)): Voltage at test point “XXX”. For example, V(ACDET) means the voltage at the test point which is

marked as “ACDET”.

V(XXX, YYY): Voltage across point XXX and YYY.

I(JXX(YYY)): Current going out from the YYY terminal of jack XX.

Jxx(BBB): Terminal or pin BBB of jack xx.

Jxx ON : Internal jumper Jxx terminals are shorted.

Jxx OFF: Internal jumper Jxx terminals are open.

Jxx (-YY-) ON: Internal jumper Jxx adjacent terminals marked as “YY” are shorted.

Measure: → A,B Check specified parameters A, B. If measured values are not within specified limits, the unit under test

has failed.

Observe → A,B Observe if A, B occurs. If they do not occur, the unit under test has failed.

Assembly drawings have locations for jumpers, test points, and individual components.

2.2 Equipment

The following list of equipment is required for fully testing the EVM:

1. Power Supplies

A power supply capable of supplying 26 V at 10 A is required. While this part can handle larger voltage and

current, it is not necessary for this procedure.

2. Load #1

A 0- to 23-V/0- to 15-A, system DC electronic load and setting as constant current load mode.

3. Load #2

A Kepco load: BOP36-12M, DC 0 to ±36 V, 0 to ±12 A (or higher), or equivalent.

4. Meters

Six Fluke 75 multimeters, (equivalent or better) or: Four equivalent voltage meters and two equivalent current

meters.

5. Computer

A computer with at least one USB port and a USB cable.

6. EV2400 Communication Kit

7. Software

Download and properly install BQstudio from http://www.ti.com/tool/BQstudio.

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2.3 Equipment Setup

Use the following guidelines to set up the equipment:

1. Set power supply #1 for 10-V DC, 5-A current limit and then turn off the supply.

2. Connect the output of power supply #1 in series with a current meter to J1 (VIN and PGND).

3. Connect a voltage meter across J1 (VIN) and J1 (PGND).

4. Connect load #1 in series with a current meter to J6 (VSYS and PGND). Connect a voltage meter across J6

(VSYS and PGND). Set 1 A at the constant current mode. Turn off load #1.

5. Connect Load #2 in series with a current meter to J5 (VBAT and PGND). Connect a voltage meter across J5

(VBAT and PGND). Set 7 V at KEPCO load output. Turn off Load #2.

Note

Add a 47-µF capacitor on the BAT pin when testing without real battery.

6. Connect J3 to the EV2400. Connect J3 to the I2C PORT 2 on the EV2400. The connections are shown in

Figure 2-1.

The picture shows the SMBus version EVM connection. For I2C version, move the connector to the I2C port.

Figure 2-1. EV2400 Connections

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7. Install jumpers using the “factory settings” from Table 1-2.

After completing these steps, the test setup for BMS051 is as shown in Figure 2-2.

Figure 2-2. Original Test Setup for BMS051 (BQ2573X EVM)

8. Turn on the computer and power supply #1. Open the BQstudio software.

a. Select Charger and click the Next button.

b. Select “Charger_1_00_BQ2573x.bqz” on the Select a Target Page.

c. After selecting the target device, change “update mode” from “immediate” to “manual”, click “Read

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Figure 2-3. BQ2573X Evaluation Software Main Window

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2.4 Procedure

2.4.1 Charge Function

1. Make sure Equipment Setup steps are followed.

2. Set Tgt Address to D6(6B)

3. Write “020A” to charge option 0 register 0x00H.

Measure → V(J1(VIN)) = 10 V ±0.5 V

Measure → V(TP28(CHG_OK)) = 3 V to 4.5 V

Measure → V(TP21(REGN)) = 6 V ±1 V

Measure → V(TP22(ILIM_HIZ)) = 2.2 V

4. Write “0400” to charge current 0x02H.

Turn on load #1.

Measure → V(J6(VSYS)) = 8.4 V ±0.5 V

5. Turn on LOAD #2 (VBAT Load).

Measure → V(J5(VBAT)) = 7 V ±0.5 V

Measure → I(J5(VBAT)) = 2 A ±0.5 A

2.4.2 OTG Function

Use the following for OTG function settings:

1. Connect a 7-V power supply to the VBAT load. Remove the VIN power supply from J1 (Connection must be

physically removed from board).

2. Write “09C4” to the OTG voltage register.

3. Write “1000” to the OTG current registers.

4. Remove JP2 (Enable OTG/VAP function).

5. Select EN_OTG in Charge Option 3.

Measure → V(J1(VIN)) = 5 V ±1 V

Figure 2-4. EN_OTG

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3 Bill of Materials, Board Layout, and Schematics

This section contains the EVM BOM, board layout images, and schematics.

3.1 Bill of Materials

Table 3-1 lists the BQ2573X EVM bill of materials.

Table 3-1. BQ2573X EVM Bill of Materials

Designator QTY Value Description Package Reference Part Number Manufacturer

!PCB1 1 Printed Circuit Board BMS051 Any

C3, C4, C5, C6, C7,

C8, C9, C10, C21,

C23, C24, C40, C42,

C43, C44, C45, C51,

C52

18 10uF CAP, CERM, 10 uF, 35 V, +/- 10%, X5R, 0805 805 GRM21BR6YA106KE43L MuRata

C11, C12, C41 3 0.01uF CAP, CERM, 0.01 uF, 50 V, +/- 5%, X7R, 0603 603 C0603C103J5RACTU Kemet

C15, C16 2 0.047uF CAP, CERM, 0.047 uF, 25 V, +/- 10%, X7R, 0603 603 GRM188R71E473KA01D MuRata

C17 1 1000pF CAP, CERM, 1000 pF, 50 V, +/- 5%, C0G/NP0, 0402 402 C1005NP01H102J050BA TDK

C18, C28, C29 3 1uF CAP, CERM, 1 uF, 35 V, +/- 10%, X7R, 0603 603 CGA3E1X7R1V105K080AC TDK

C19, C20 2 150pF CAP, CERM, 150 pF, 50 V, +/- 5%, C0G/NP0, 0603 603 C0603C151J5GACTU Kemet

C22, C27, C38, C39 4 0.1uF CAP, CERM, 0.1 uF, 50 V, +/- 10%, X7R, 0603 603 CGA3E2X7R1H104K080AA TDK

C25 1 0.47uF CAP, CERM, 0.47 uF, 50 V, +/- 10%, X7R, 0805 805 C2012X7R1H474K125AB TDK

C26, C55 2 10uF CAP, CERM, 10 uF, 25 V, +/- 10%, X7R, 1206 1206 GRM31CR71E106KA12L MuRata

C30 1 2.2uF CAP, CERM, 2.2 uF, 35 V, +/- 10%, X5R, 0603 603 GRM188R6YA225KA12D MuRata

C31 1 33pF CAP, CERM, 33 pF, 50 V, +/- 5%, C0G/NP0, 0402 402 GRM1555C1H330JA01D MuRata

C32 1 680pF CAP, CERM, 680 pF, 50 V, +/- 5%, C0G/NP0, 0402 402 GRM1555C1H681JA01D MuRata

C33 1 4700pF CAP, CERM, 4700 pF, 50 V, +/- 10%, X7R, 0402 402 GRM155R71H472KA01D MuRata

C34 1 15pF CAP, CERM, 15 pF, 50 V, +/- 5%, C0G/NP0, 0402 402 GRM1555C1H150JA01D MuRata

C35, C36, C37 3 100pF CAP, CERM, 100 pF, 50 V, +/- 5%, C0G/NP0, 0603 603 C0603C101J5GAC Kemet

C46, C47 2 0.033uF CAP, CERM, 0.033 uF, 50 V, +/- 10%, X7R, 0603 603 GRM188R71H333KA61D MuRata

C48, C49, C53 3 33uF CAP, TA, 33 uF, 35 V, +/- 20%, 0.065 ohm, SMD 7343-31 T521D336M035ATE065 Kemet

D2, D3 2 30V Diode, Schottky, 30 V, 0.2 A, SOD-323 SOD-323 BAT54HT1G ON Semiconductor

D4 1 Green LED, Green, SMD 1.6x0.8x0.8mm LTST-C190GKT Lite-On

H1, H2, H3, H4 4 Bumpon, Hemisphere, 0.44 X 0.20, Clear Transparent Bumpon SJ-5303 (CLEAR) 3M

J1, J5, J6 3 Terminal Block, 5.08 mm, 2x1, Brass, TH 2x1 5.08 mm Terminal Block ED120/2DS On-Shore Technology

J2 1 Terminal Block, 3.5mm Pitch, 4x1, TH 14x8.2x6.5mm ED555/4DS On-Shore Technology

J3 1 Connector Header Through Hole, Right Angle 4 position 0.100"

(2.54mm)

HDR4 22053041 Molex

J4 1 Terminal Block, 3.5mm Pitch, 3x1, TH 10.5x8.2x6.5mm ED555/3DS On-Shore Technology

J7 1 Header (shrouded), 100mil, 5x2, High-Temperature, Gold, TH 5x2 Shrouded header N2510-6002-RB 3M

JP2, JP4, JP6, JP8 4 Header, 100mil, 2x1, Gold, TH Header, 2x1, 100mil 5-146261-1 TE Connectivity

JP3 1 Header, 100mil, 5x2, Gold, TH 5x2 Header TSW-105-07-G-D Samtec

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