Texas Instruments BQ25611D Manual de usuario

SLUUC27B–June 2019–Revised January 2020

BQ25611D, BQ25619 (BMS025) Evaluation Module

User's Guide

SLUUC27B–June 2019–Revised January 2020

BQ25611D, BQ25619 (BMS025) Evaluation Module

This user's guide provides detailed testing instructions for the BQ25611D and BQ25619 evaluation module

(EVM). Also included are descriptions of the necessary equipment, equipment setup, procedures, the

printed-circuit board layouts, schematics, and the bill of materials (BOM).

Throughout this user's guide, the abbreviations EVM,BQ25611DEVM,BQ25619EVM, BMS025, and the

term evaluation module are synonymous with the BMS025 evaluation module, unless otherwise noted.

Contents

1 Introduction ................................................................................................................... 3

1.1 EVM Features....................................................................................................... 3

1.2 I/O Descriptions..................................................................................................... 3

2 Test Summary................................................................................................................ 4

2.1 Equipment ........................................................................................................... 4

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

2.3 Software Setup...................................................................................................... 5

2.4 Test Procedure...................................................................................................... 7

3 PCB Layout Guideline ..................................................................................................... 11

4 Board Layout, Schematic, and Bill of Materials ........................................................................ 12

4.1 Board Layout....................................................................................................... 12

4.2 Schematics......................................................................................................... 20

4.3 Bill of Materials .................................................................................................... 22

List of Figures

1 Original Test Setup for BMS025A......................................................................................... 5

2 BQStudio Device Type Selection Window ............................................................................... 6

3 BQStudio Charger Selection Window..................................................................................... 6

4 Main Window of BQ2561x EVM Software................................................................................ 6

5 BQ25619EVM Charge Mode Efficiency .................................................................................. 9

6 BQ25619EVM Boost Mode Efficiency................................................................................... 10

7 BMS025 Rev. A Top Overlay............................................................................................. 12

8 BMS025 Rev. A Top Solder Mask....................................................................................... 13

9 BMS025 Rev. A Top Layer ............................................................................................... 14

10 BMS025 Rev. A MidLayer 1 .............................................................................................. 15

11 BMS025 Rev. A MidLayer 2 .............................................................................................. 16

12 BMS025 Rev. A Bottom Layer ........................................................................................... 17

13 BMS025 Rev. A Bottom Solder Mask ................................................................................... 18

14 BMS025 Rev. A Bottom Overlay......................................................................................... 19

15 BQ25619EVM Schematic................................................................................................. 20

16 BQ25611DEVM Schematic ............................................................................................... 21

List of Tables

1 Device Data Sheets ......................................................................................................... 3

2 EVM I/O Connections ....................................................................................................... 3

3 EVM Shunt and Switch Installation........................................................................................ 3

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4 Recommended Operating Conditions..................................................................................... 4

5 BQ25619EVM Bill of Materials ........................................................................................... 22

6 BQ25611DEVM Bill of Materials ......................................................................................... 26

Trademarks

Microsoft, Windows are registered trademarks of Microsoft Corporation.

All other trademarks are the property of their respective owners.

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Introduction

SLUUC27B–June 2019–Revised January 2020

BQ25611D, BQ25619 (BMS025) Evaluation Module

1 Introduction

1.1 EVM Features

For detailed features and operation, refer to Table 1 for a list of devices and their data sheets.

Table 1. Device Data Sheets

Device Data Sheet EVM Label Variant

BQ25611D SLUSDF6 BQ25611DEVM 002

BQ25619 SLUSDF8 BQ25619EVM 005

The BMS025 evaluation module (EVM) is a complete charger module for evaluating an I2C-controlled,

single-cell NVDC charge using any of the devices listed above.

This EVM does not include an EV2300/EV2400 interface board. To evaluate the EVM, an

EV2300/EV2400 interface board must be ordered separately.

1.2 I/O Descriptions

Table 2 lists the input and output connections available on this EVM and their respective descriptions.

Table 2. EVM I/O Connections

Jack Description

J1(2) –VIN Positive rail of the charger input voltage

J1(1) –GND Ground

J2(1) – SYSTEM Positive rail of the charger system output voltage, typically connected to the system

load

J2(2) –GND Ground

J3(1) –PMID Positive rail of the charger output voltage for power bank applications in reverse boost

mode (OTG). This output also shares the rail with the VIN input rail in forward buck

mode

J3(2) –GND Ground

J4(3) –BATTERY Positive rail of the charger battery input, connected to the positive terminal of the

external battery

J4(2) – BATSNS Input connected to the positive node of the battery for remote cell voltage

measurement

J4(1) - GND Ground

J5 I2C 4-pin connector for the EV2300/2400 interface board

J6 Input source Micro B USB port

Table 3 lists the jumper and shunt installations available on this EVM and their respective descriptions.

Table 3. EVM Shunt and Switch Installation

Jack Description BQ25611D Setting BQ25619 Setting

JP1 I/O Pullup rail selection. Selection will have either BAT or SYS as the pullup rail

for SDA, SCL, CE, PG, STAT, and INT pins PULLUP to SYS Short PULLUP to

SYS

JP2 Remote BATSNS pin connection to Battery input terminal. Disconnect if sensing

battery voltage remotely through J4(2). If disconnected with no input on J4(2),

charger BATSNS will default connect to BAT pin internally.

Installed Installed

JP3 PMID_GOOD pin connection to control N-Ch. MOSFET for a power bank

application Not Installed Installed

JP4 Thermistor COOL temperature setting. Connect jumper to simulate charger

entering TCOOL (T1-T2) temperature region. Not Installed Not Installed

JP5 Thermistor COLD temperature setting. Connect jumper to simulate charger

entering TCOLD (<T1) temperature region. Not Installed Not Installed

JP6 Micro B USB input D- connection to charger D- pin Installed Not Installed

Test Summary

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BQ25611D, BQ25619 (BMS025) Evaluation Module

Table 3. EVM Shunt and Switch Installation (continued)

Jack Description BQ25611D Setting BQ25619 Setting

JP7 Thermistor NORMAL temperature setting. Connect jumper to simulate charger

entering TNORMAL (T2-T3) temperature region. Installed Installed

JP8 Thermistor WARM temperature setting. Connect jumper to simulate charger

entering TWARM (T3-T5) temperature region. Not Installed Not Installed

JP9 Thermistor HOT temperature setting. Connect jumper to simulate charger

entering THOT (>T5) temperature region. Not Installed Not Installed

JP10 Micro B USB input D+ connection to charger D+ pin Installed Not Installed

JP11 PG pin LED indicator connection. On PG enabled chargers, this indicates the

Power Good status Not Installed Not Installed

JP12 STAT pin LED indicator connection. This indicates the current charger Status Installed Installed

JP13 Charger D+ pin and charger D- pin short connection. Connect this on D+/D-

detection enabled chargers to simulate the connection of a DCP-type USB port

as defined by USB BC1.2

Not Installed Not Installed

JP14 CE pin connection to ground to enable charging. When removed, CE pin will pull

up to disable charge Installed Installed

JP15 PSEL pin input current selection. Connect this to HIGH on PSEL enabled

chargers to select 500mA default input current limit. Connect this to LOW on

PSEL enabled chargers to select 2.4-A default input current limit

Not Installed Short PSEL to

LOW

JP16 VPB status LED indicator connection. On power bank PMID_GOOD enabled

chargers, this indicates VPB rail is active Not Installed Not Installed

S1 QON control switch. Press either for exiting Shipping Mode or System Reset. Default Off Default Off

Table 4 lists the recommended operating conditions for this EVM.

(1) BQ25619EVM maximum IBAT is 1.5A.

Table 4. Recommended Operating Conditions

Symbol Description MIN TYP MAX Unit

VVBUS, VVAC Input voltage applied to VAC and VBUS pins 3.9 14.0 V

VBAT Battery voltage applied to BAT pin 0 4.208 4.52 V

IVBUS Input current into VBUS 0 3.2 A

ISW Output current (SW) 3.2 A

IBAT Fast charging current 0 3.0 (1) A

Discharging current through internal BATFET 6 A

2 Test Summary

2.1 Equipment

This section includes a list of supplies required to perform tests on this EVM.

1. Power Supplies: Power Supply #1 (PS1): A power supply capable of supplying 5 V at 3 A is required.

While this part can handle larger voltage and current, it is not necessary for this procedure.

2. Loads: Load #1 (4-Quadrant Supply, Constant Voltage < 4.5 V): A "Kepco" Load, BOP, 20-5M, DC 0

to ±20 V, 0 to ±5 A (or higher)

Alternative Option: A 0–20V/0–5 A, > 30-W DC electronic load set in a constant voltage loading mode

Load #2(Electronic or Resistive Load): 10 Ω, 5 W (or higher)

3. Meters: (6x) "Fluke 75" multimeters, (equivalent or better).

Alternative Option: (4x) equivalent voltage meters and (2x) equivalent current meters. The current

meters must be capable of measuring at least 5-A.

4. Computer: A computer with at least one USB port and a USB cable. Must have the latest version of

Battery Management Studio installed.

5. USB-TO-GPIO Communication Kit: EV2300/EV2400 USB-based PC interface board.

Power Supply

Load #1

EV2300/2400

4-pin Connector

USB

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Test Summary

SLUUC27B–June 2019–Revised January 2020

BQ25611D, BQ25619 (BMS025) Evaluation Module

6. Software: Download the latest version of BQSTUDIOTEST from www.ti.com.

Double click the Battery Management Studio installation file and follow the installation steps. The

software supports the Microsoft®Windows®XP, 7, and 10 operating systems.

2.2 Equipment Setup

Use the following list to set up the EVM testing equipment:

1. Review EVM connections in Table 2.

2. Set PS1 for 5-V DC, 2-A current limit and then turn off the supply.

3. Connect the output of PS1 in series with a current meter to J1 (VBUS and PGND).

4. Connect a voltage meter across TP12 (VBUS) and TP31 (PGND), or across J1.

5. Turn on Load #1, set to constant voltage mode, and output to 2.5-V. Disable Load. Connect Load in

series with a current meter (multimeter), ground side, to J4 (BAT and PGND) as shown in Figure 1.

6. Connect one voltage meter across TP16 (BAT) and TP30 (PGND), or across J4-3 and J4-1 as shown

in Figure 1.

7. Connect one voltage meter across TP17 (SYS) and TP30 (PGND), or across J2-1 and J2-2 as shown

in Figure 1.

8. Connect one voltage meter across TP14 (VPB) and TP32 (PGND), or across J3-1 and J3-2 as shown

in Figure 1.

9. Connect the EV2300/2400 USB interface board to the computer with a USB cable and from I2C port to

J5 with the 4-pin cable. The connections are shown in Figure 1.

10. Install shunts as shown in Table 3.

Figure 1. Original Test Setup for BMS025A

2.3 Software Setup

Use the following to set up the EVM testing software:

1. On the computer connected to the EV2300/2400 interface board, launch Battery Management Studio

(BQStudio). Select Charger as seen in Figure 2.

2. Select the appropriate configuration file based on the device from the window shown in Figure 3.

3. Choose , on the window that appears, and the main window of the BQ2561X EVM

software will appear, as shown in Figure 4.

Test Summary

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BQ25611D, BQ25619 (BMS025) Evaluation Module

Figure 2. BQStudio Device Type Selection Window Figure 3. BQStudio Charger Selection Window

Figure 4. Main Window of BQ2561x EVM Software

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Test Summary

SLUUC27B–June 2019–Revised January 2020

BQ25611D, BQ25619 (BMS025) Evaluation Module

2.4 Test Procedure

2.4.1 Initial Settings

Use the following steps for enable the EVM test setup:

1. Make sure Equipment Setup steps have been followed.

2. Launch the BQ2561X EVM GUI software, if not already done.

3. Turn on PS1:

•Measure →Vsys (SYS-TP17 and PGND-TP30) = 4.20V ±0.3V

NOTE: Completely dsconnect Load #1 from BATTERY connections if different value is seen.

2.4.2 Communication Verification

Use the following steps for communication verification:

1. In the EVM software, click the button

• Verify that the GUI reads in the top right corner.

NOTE: If the device reads verify Section 2.2 and Section 2.4.1 steps have

been followed.

2. In the Field View (see Figure 4), make the following changes as necessary:

• Set

• Check

• Uncheck

2.4.3 Charger Mode Verification

Use the following steps for charger mode verification:

1. PS1 should be on from Section 2.4.1. In the EVM software, click twice.

• Verify that all Fault statuses read "Normal"

Test Summary

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BQ25611D, BQ25619 (BMS025) Evaluation Module

•Verify →STAT LED (D5) is ON

2. Enable Load #1 (see Section 2.2)and take measurements as follows:

•Measure →VSYS (SYS-TP17 and PGND-TP30) = 3.65V ±0.3V

•Measure →VBAT (BATTERY-TP16 and PGND-TP30) = 2.5V ±0.2V

•Measure →IBAT = 240mA ±50mA

3. Change Load #1 to 3.7V and take measurements as follows:

•Measure →VSYS (SYS-TP17 and PGND-TP30) = 3.8V ±0.3V

•Measure →VBAT (BATTERY-TP16 and PGND-TP30) = 3.7V ±0.2V

•Measure →IBAT = 480mA ±200mA

4. In the EVM software, set

•Measure →IIN = 500mA ±200mA

Charge Current (A)

Charge Efficiency (%)

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.593725

100

VBUS = 5 V

VBUS = 9 V

VBUS = 12 V

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Test Summary

SLUUC27B–June 2019–Revised January 2020

BQ25611D, BQ25619 (BMS025) Evaluation Module

2.4.4 Boost Mode Verification

Use the following steps for boost mode verification:

1. Turn off and disconnect PS1.

2. Set Load #1 to 3.7V and 2A current limit.

NOTE: If Load #1 connected from BATTERY-J4(3) to PGND-J4(1) is not a four quadrant supply,

remove Load #1 and use PS1 (disconnected in 8.4.1), set to 3.7V, 2A current limit and

connect to BATTERY-J4(3) to PGND-J4(1).

3. In the EVM software, check .

4. Connect Load #2

• For BQ25619 (BMS025-005): across VPB-J3(1) and PGND-J3(2).

• For all others: across VIN-J1(2) and PGND-J1(1).

• For BQ25619, measure VPB (VPB-TP14 and PGND-TP32) = 5.0V ±0.2V.

• For all others, measure VBUS (VBUS-TP12 and PGND-TP31) = 5.0V ±0.2V.

5. Turn off and disconnect power supply.

6. Remove Load #2 from connection.

2.4.5 Evaluation Results

This section contains efficiency data for both Charger Mode and Boost Mode, specifically on the

BQ25619EVM.

Figure 5. BQ25619EVM Charge Mode Efficiency

Boost Output Current (A)

Boost Efficiency (%)

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

100

VBAT = 3.2 V

VBAT = 3.8 V

VBAT = 4.2 V

Test Summary

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Figure 6. BQ25619EVM Boost Mode Efficiency

2.4.6 Helpful Tips

1. The leads and cables to the various power supplies, batteries and loads have resistance. The current

meters also have series resistance. The charger dynamically reduces charge current depending on the

voltage sensed at its VAC/VBUS pin (using the VINDPM feature), BAT pin (as part of normal

termination), and TS pin (through its battery temperature monitoring feature via battery thermistor).

Therefore, voltmeters must be used to measure the voltage as close to the IC pins as possible instead

of relying on the digital readouts of the power supply. If a battery thermistor is not available, make sure

shuntJP7 is in place.

2. When using a source meter that can source and sink current as your battery simulator, TI highly

recommends adding a large (1000+ μF) capacitor at the EVM BATTERY and GND connectors in order

to prevent oscillations at the BAT pin due to mismatched impedances of the charger output and source

meter input within their respective regulation loop bandwidths. Configuring the source meter for 4-wire

sensing eliminates the need for a separate voltmeter to measure the voltage at the BAT pin.

When using 4-wire sensing, always ensure that the sensing leads are connected in order to prevent

accidental overvoltage by the power leads.

3. For precise measurements of input and output currents, especially battery charging current regulation

near termination, the current meter in series with the battery or battery simulator should not be set to

auto-range and may need be removed entirely. An alternate method for measuring charge current is to

either use an oscilloscope with hall effect current probe or by a differential voltage measurement

across the relevant sensing resistors populated on the BMS025 EVM.

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