Analog Devices DC2973A Guida rapida alla configurazione

DEMO MANUAL DC2973A

Rev. 0

DESCRIPTION

LTC3337

Primary Battery SOH Monitor with

Precision Coulomb Counter

Demonstration circuit 2973A shows the LT C

3337

Primary Battery State of Health (SOH) monitor with pre-

cision coulomb counter operating with a configurable

peak current limit. The LTC3337 supports input voltages

from 1.8V to 5.5V and a peak current up to 100mA with a

quiescent current of 100nA. Coulomb count, battery volt-

age, and Battery Series Resistance (BSR) are measurable

and can be used to quantify the charge state and health

of a battery.

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

BOARD PHOTO

The DC2973A demonstrates a simple layout for the high-

est-power configuration of the LTC3337. The circuit can

be reduced for lower IPEAK levels. The demo board can

be connected directly to a PC using a micro USB cable in

order to run a GUI and configure simple a Battery State of

Charge (SOC) monitor. Source code for the GUI is avail-

able and can be used as a starting point for LTC3337

firmware development.

Design files for this circuit board are available.

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN Input Voltage Range 1.8 5.5 V

IOUT Output Current IPK2 – IPK0 = 111 100 mA

DEMO MANUAL DC2973A

Rev. 0

QUICK START PROCEDURE

Refer to Figure1 for the proper measurement equipment

setup and jumper settings. Please follow the procedure

below to familiarize yourself with the DC2973A.

1. Conﬁgure the IPEAK jumpers for your chosen current

limit. Choose R1 based on the formula below:

R1 = 10/IPEAK (Ω)

R1 Power Rating ≥ 2.5 • IPEAK (W)

Or use an electronic load in CC mode pulling IPEAK/2.

2. Connect DC2973A to a computer using a USB cable and

launch QuikEval™ to download and run the GUI (see

GUI Application section for download instructions).

3. Enable PS1.

4. In the GUI, click the Battery Setup button and conﬁgure

for your chosen battery (or use the settings shown

below for a demo). Once ﬁnished, click the start button.

5. The coulomb counter is now monitoring the SOC of

the battery. For higher resolution visibility, switch

to the Engineering tab to view the raw Accumulated

Charge count.

6. Once familiar with the operation, replace PS1 and R1

with your battery and system load, respectively.

Figure1. Quick Start Setup for the DC2973A Demo Circuit

DEMO MANUAL DC2973A

Rev. 0

CONFIGURING IPEAK

SOFTWARE TOOLS

The peak current limit of the LTC3337 (IPEAK) is con-

figured by moving the JP1-JP3 shunts on the DC2973A

demo board. Note that the IPEAK setting is locked at

startup.

Refer to Table1 to configure the IPEAK setting. This

table is also located on the back of the DC2973A PCB.

On-Board Digital Interface

The LTC3337 demo board includes an Atmel SMART SAM

D21 processor with an Arduino bootloader that makes it

compatible with the Arduino IDE. This means users can

prototype processor functionality directly in the free Ardu-

ino IDE. The SDK mentioned below includes an Arduino

example project that can be opened and uploaded to the

board through the Arduino IDE.

Software Development Kit

To help with learning and development of LTC3337 appli-

cations, there exists a Software Development Kit (SDK)

that makes interfacing with the LTC3337 as simple as

possible. The package includes a few example programs

and comes fully equipped with register names and value

formatting. Resources are given for both C code (with

Arduino examples) and Python code. This SDK can be

downloaded from the LTC3337 product webpage. Fur-

ther instructions to use the SDK are included within the

download.

Restoring GUI-Compatible Firmware

If the onboard firmware is changed (to upload SDK firm-

ware, for example), it can be restored at any time through

the GUI. In this case, the GUI will need to be launched

manually because QuikEval will not recognize the board

once it has been reprogrammed. By default, the GUI

installs to:

C:\Program Files (x86)\LT C \LTC3337 GUI\em3337.exe

Debugging Custom Designs

The DC2973A’s default firmware and engineering GUI tab

are designed to give a high-speed debugging environment

for LTC3337 operation. This functionality can be easily

extended to interface with your own custom LTC3337 cir-

cuit design. To use the engineering GUI tab with a custom

circuit board, simply leave the LTC3337 on the DC2973A

unpowered and connect your own board to the SMBus

interface accessible through header J3.

Table1. IPEAK Configuration

JUMPER CONFIGURATION

IPEAKIPK2 IPK1 IPK0

0 0 0 5mA

0 0 1 10mA

0 1 0 15mA

0 1 1 20mA

1 0 0 25mA

1 0 1 50mA

1 1 0 75mA

1 1 1 100mA

DEMO MANUAL DC2973A

Rev. 0

GUI APPLICATION

Introduction to the GUI

The LTC3337 GUI provides a graphical interface for some

of the main features of the LTC3337. In addition, it pro-

vides an advanced debugging interface that can be used

in evaluating operation of the DC2973A as well as a cus-

tomer’s own design.

To use the DC2973A, the PC must first have the proper

software driver and GUI installed. Download the QuikEval

software from www.analog.com and install the QuikEval

software by running the executable ltcqev.exe. Follow the

instructions to connect the DC2973A.

For more detail on GUI functions, launch the GUI and go

to Window ➝Show Help Guide.

GUI Layout

The LTC3337 GUI is divided into a Dashboard tab, an

Engineering tab, and a Schematic tab. The Dashboard

tab shows a graphical representation of a some of the

LTC3337’s core functionality. The Engineering tab shows

all registers and is intended to be used for lower-level

development and debugging purposes. The Schematic

tab just displays the schematic for reference.

Dashboard Tab

The Dashboard tab shows all the basic information

needed to monitor a battery’s state of charge. Along with

the accumulated charge information, the battery voltage,

series resistance, and average current are also shown.

While the dashboard is open, the GUI reads data from the

LTC3337 every 200ms.

To set up a battery for SoC measurement, click the Battery

Setup button in the bottom-left corner. From there, con-

figure your battery settings as required and click the Start

button. This sets a target accumulated charge value at

which the remaining capacity of the battery is considered

to be 0%. After starting the test, intermediate calculations

can be viewed by showing the Console window.

Figure2. The Dashboard Tab

DEMO MANUAL DC2973A

Rev. 0

GUI APPLICATION

Engineering Tab

The Engineering tab is an advanced debugging tool which

allows high-speed reading of any register. Register group

ings can be displayed by activating the checkboxes in the

Categories section.

To read a register, simply double-click the register name or

value. To read all shown registers, double-click anywhere

in the empty background space. To continuously read all

shown registers, right-click and select Continuous Read

from the context menu. When continuously reading, the

GUI will poll all of the displayed registers as fast as pos-

sible. By default, a register entry will flash green when the

new data is different from the previous data;this can be

changed in the right-click context menu.

To write a register, right-click on a writable register and

select Write…from the context menu. This will bring up

a dialog with a few options for writing values.

For detailed information about a register, hovering over it

for about a second will display the same tool tips as are

visible in the other tabs of the GUI.

By default, register entries are displayed as formatted

decimal values or Booleans. This can be changed to raw

binary or hexadecimal notation by right-clicking on an

entry and choosing Select Format.

Tabs can be added to the Engineering view by clicking

the + button in the top-right corner. This allows the user

to change between viewing different register groupings

at ease.

Consult the Help Guide for more detail on the

Engineering tab.

Figure3. The Engineering Tab

DEMO MANUAL DC2973A

Rev. 0

GUI APPLICATION

Schematic Tab

The Schematic Tab simply shows the DC2973A schematic

for quick reference while using the GUI.

Figure4. The Schematic Tab

DEMO MANUAL DC2973A

Rev. 0

GUI APPLICATION

Logger Window

The Logger can be launched by going to Window ➝

Show Logger. This feature allows configurable logging

of bitfields and can be used for rapid or long-term data

collection. Data can be exported into a CSV format (for

import to Excel) or to a SQL database. Note that other GUI

tabs will be inactive while logging, so writing bitfields is

disabled.

Figure5. The Logger Window

DEMO MANUAL DC2973A

Rev. 0

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP., 10µF, X5R, 10V, 10%, 0603 AVX, 0603ZD106KAT2A

MURATA, GRM188R61A106KAALD

SAMSUNG, CL10A106KP8NNNC

2 1 C2 CAP., 150µF, X5R, 6.3V, 20%, 1210 SAMSUNG, CL32A157MQVNNNE

3 0 C3 CAP., 180µF, ALUM POLY, OS-CON, 25V, 20%,

8mm × 11.9mm, SMD, RADIAL, E12

PANASONIC, 25SVPF180M

4 1 C4 CAP., 10µF, X5R, 6.3V, 20%, 0603 MURATA, GRM188R60J106ME47D

MURATA, GRM188R60J106ME47J

TAIYO YUDEN, JMK107ABJ106MA-T

AVX, 06036D106MAT2A

NIC, NMC0603X5R106M6.3TRPF

TDK, C1608X5R0J106M080AB

5 4 C5, C6, C7, C8 CAP., 0.1µF, X5R, 10V, 20%, 0402 WURTH ELEKTRONIK, 885012105010

6 2 C9, C10 CAP., 22pF, NP0, 50V, 5%, 0402 WURTH ELEKTRONIK, 885012005057

7 2 C11, C12 CAP., 1µF, BJ, 10V, 20%, 0402 TDK, CGB2A1JB1A105M033BC

8 1 C13 CAP., 0.01µF, X7R, 25V, 10%, 0402 WURTH ELEKTRONIK, 885012205050

9 1 C14 CAP., 2.2µF, X5R, 10V, 20%, 0402 WURTH ELEKTRONIK, 885012105013

10 0 C15, C16 CAP., 10F, ULTRA, 2.7V, –10/+20%, RADIAL, THT NESSCAP CO. LTD., BCAP0010 P270 S01

NESSCAP CO. LTD., ESHSR-0010C0-002R7

11 0 C17 CAP., 0.12F, SUPERCAP, HIGH TEMP, 5.5V, 20%, 20mm ×

18mm × 2.5mm, SMD, DUAL CELL

CAP-XX, HA202F

12 2 D1, D4 LED, YELLOW, WATERCLEAR, 0603 WURTH ELEKTRONIK, 150060YS75000

13 2 D2, D3 LED, BRIGHT GREEN, WATERCLEAR, 0603 WURTH ELEKTRONIK, 150060VS75000

14 4 E1, E2, E3, E4 TEST POINT, TURRET, 0.094" MTG. HOLE, PCB 0.062" THK MILL-MAX, 2501-2-00-80-00-00-07-0

15 3 E5, E6, E7 TEST POINT, TURRET, 0.064" MTG. HOLE, PCB 0.062" THK MILL-MAX, 2308-2-00-80-00-00-07-0

16 1 J1 CONN., uUSB 2.0, RCPT., 5-PIN, 1PORT, REVERSE

MOUNT, R/A HORZ., TYPE B, FLANGELESS

TE CONNECTIVITY, 1932788-1

17 1 J2 CONN., HDR, MALE, 2x5, 1.27mm, VERT, ST, THT WURTH ELEKTRONIK, 62201021121

18 1 J3 CONN., HDR, MALE, 1x5, 2.54mm, VERT, ST, THT SAMTEC, TSW-105-07-L-S

19 4 JP1, JP2, JP3, JP4 CONN., HDR, MALE, 1x3, 2mm, VERT, ST, THT, 10u" Au SAMTEC, TMM-103-02-L-S

20 1 L1 IND., 30Ω AT 100MHz, BEAD, 10%, 6A, 10mΩ, 0805, 1LN TDK, MPZ2012S300AT000

21 1 LB1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY, THT-96-717-10

22 3 M1, M2, M3 XSTR., MOSFET, N-CH, 20V, 1.4A, SOT-323, AEC-Q200 INFINEON, BSS816NWH6327XTSA1

23 3 M4, M5, M6 XSTR., MOSFET, DUAL, N-CH, 280mA, SOT-563 DIODES INC., 2N7002VAC-7

24 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE, 8833

25 1 PCB1 PCB, DC2973A ADI APPROVED SUPPLIER, 600-DC2973A

26 3 R1, R2, R6 RES., 10k, 5%, 1/16W, 0402, AEC-Q200 NIC, NRC04J103TRF

ROHM, MCR01MZPJ103

VISHAY, CRCW040210K0JNED

27 0 R3 RES., OPTION, 0603

28 2 R4, R5 RES., 0Ω, 1%, 0603, AEC-Q200 KOA SPEER, RK73Z1JTTDD

VISHAY, CRCW06030000Z0EA

29 3 R7, R16, R17 RES., 4.7k, 5%, 1/16W, 0402, AEC-Q200 NIC, NRC04J472TRF

VISHAY, CRCW04024K70JNED

DEMO MANUAL DC2973A

Rev. 0

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

30 3 R8, R13, R14 RES., 2.2k, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04022K20JNED

NIC, NRC04J222TRF

31 3 R9, R10, R11 RES., 301Ω, 1%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3EKF3010V

VISHAY, CRCW0603301RFKEA

NIC, NRC06F3010TRF

32 1 R12 RES., 10k, 5%, 1/16W, 0402 SAMSUNG, RC1005J103CS

YAGEO, RC0402JR-0710KL

33 1 R15 RES., 1M, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04021M00JNED

NIC, NRC04J105TRF

34 1 R18 RES., 100k, 5%, 1/16W, 0402, AEC-Q200 ROHM, MCR01MZPJ104

VISHAY, CRCW0402100KJNED

35 1 R19 RES., 196k, 1%, 1/10W, 0603 VISHAY, CRCW0603196KFKEA

YAGEO, RC0603FR-07196KL

36 1 R20 RES., 115k, 1%, 1/10W, 0603 NIC, NRC06F1153TRF

VISHAY, CRCW0603115KFKEA

YAGEO, RC0603FR-07115KL

37 1 R21 RES., 1Ω, 5%, 1/16W, 0402, AEC-Q200 KOA SPEER, RK73B1ETTP1R0J

STACKPOLE ELECTRONICS, INC., RMCF0402JT1R00

VISHAY, CRCW04021R00JNED

38 0 TP1, TP2 TESTPOINT, PCB COPPER FEATURE

39 1 U1 PRIMARY BATTERY SOH MONITOR W/PRECISION

COULOMB COUNTER, GQFN-12

ANALOG DEVICES, LTC3337ERC#PBF

40 1 U2 IC, USB 2.0 µModule

TRANSCEIVER, BGA-44 ANALOG DEVICES, LTM2884CY#PBF

41 1 U3 IC, MEMORY, MCU, 32-BIT, 256KB FLASH, TQFP48 MICROCHIP, ATSAMD21G18A-AUT

42 1 U4 IC, REG LDO ADJ, 100mA, TSOT23-5 ANALOG DEVICES, LT1761ES5-BYP#PBF

ANALOG DEVICES, LT1761ES5-BYP#TRMPBF

ANALOG DEVICES, LT1761ES5-BYP#TRPBF

43 4 XJP1, XJP2, XJP3,

XJP4

CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

44 1 Y1 CRYSTAL, 32.768kHz, 12.5pF, 3.2mm × 1.5mm SMD ABRACON, ABS07-32.768kHz-4-T

ECS INC., ECS-.327-12.5-34B-TR

KYOCERA, ST3215SB32768H5HPWAA

NDK, (See DFF)

DEMO MANUAL DC2973A

Rev. 0

SCHEMATIC DIAGRAM

D D

C C

B B

A A

REVISION HISTORY

ECO REV DESCRIPTION APPROVED DATE

-02 PRODUCTION ZP 4-23-2020

1.8V - 5.5V

BAT_IN

GND

BATOUT_OK

GND

UNLESS OTHERWISE SPECIFIED

1. RESISTORS: OHMS, 0402, 1%, 1/16W

2. CAPACITORS: 0402, 10%, 25V

PRIMARY BATTERY SOH MONITOR WITH

PRECISION COULOMB COUNTER

PCA ADDITIONAL PARTS

1.8V - 5.5V

100mA

GND

BAT_OUT

IPK2

IPK1

IPK0

LED_PWR

EXT

USB

ONLY ONE OF R3

OR R4 SHOULD BE

POPULATED AT ONCE

IRQ BATOUT_OK

120mF

OPT

FOR HIGH-ESR

BATTERIES

REMOVE R5 BEFORE CONNECTING TO BAL PIN.

INSTALL R5 IF BAL PIN NOT USED.

OPT

IPEAK

15mA

IPK1

20mA

5mA

IPK0

10mA

IPK2

111

011

0 0 25mA

75mA

50mA

100mA

OPT

EXT_LED_PWR

1.8V - 5.5V

BAT_IN BAT_IN BAT_IN

SCL

SDA

IRQ

DVcc

IRQ

USB_PWR

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

SIZE:

SKU NO.

SCHEMATIC NO. AND REVISION:

PCA ASS'Y DWG:

www.analog.com

LTC3337

DC2973A

710-DC2973A_REV02

705-DC2973A_REV02

8.5x11

04-23-2020DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

SIZE:

SKU NO.

SCHEMATIC NO. AND REVISION:

PCA ASS'Y DWG:

www.analog.com

LTC3337

DC2973A

710-DC2973A_REV02

705-DC2973A_REV02

8.5x11

04-23-2020DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

SIZE:

SKU NO.

SCHEMATIC NO. AND REVISION:

PCA ASS'Y DWG:

www.analog.com

LTC3337

DC2973A

710-DC2973A_REV02

705-DC2973A_REV02

8.5x11

04-23-2020

MH4 STANDOFF,NYLON,SNAP-ON,0.50"

PCB1 PCB, DC2973A REV02

10uF

4.7k

YELLOW

R3 OPT

0603

BRIGHT GREEN

MH1 STANDOFF,NYLON,SNAP-ON,0.50"

0603

MH3 STANDOFF,NYLON,SNAP-ON,0.50"

R4 0

0603

JP2

10k

C3 C2

150uF

1210

6.3V

20%

LB1 LABEL

JP1

10k

STNCL1 TOOL, STENCIL, 700-DC2973A REV02

JP4

10k

BSS816NWH6327XTSA1

2.2k

C16

10F

C17

HA202F

BAL

MH2 STANDOFF,NYLON,SNAP-ON,0.50"

C15

10F

LTC3337ERC

BAL 1

AVcc 2

DVcc

SCL

SDA

IRQ

BATOUT_OK 7

IPK2

IPK1

IPK0

BAT_IN

11 BAT_OUT 12

GND

JP3

AVcc

BAT_IN

BATOUT_OK

AVcc

BATOUT_OK

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