Intersil ISL94203EVKIT1Z User Manual

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

ISL94203EVKIT1Z Evaluation Kit User Guide

The ISL94203EVKIT1Z is a kit that facilitates testing of the

ISL94203

Li-ion battery pack monitor and control ICs. The

ISL94203 monitors cell voltage, current and temperature. It

converts the cell voltages, pack current and temperatures to

12-bit digital values, provides cell balance control and provides

complete stand-alone battery pack operation.

The ISL94203 default stand-alone operation can be overridden

by an external microcontroller. The PC graphical user interface

(GUI) supports the hooks needed to monitor stand-alone

operation and to demonstrate operation with an external

microcontroller.

Specifications

This board has been configured and optimized for the following

operating conditions:

• Configurable to 3 to 8 cells, default 3 cells

• Standard cell voltage range 2.699V to 4.250V

• OV/UV delay times 1 and 4 seconds respectively

• CB max delta voltage 0.501

• CB max/min voltage 4.032V and 3.100V

NOTE: Consult programming options for full listing of programmable

parameters and ranges.

July 30, 2015

AN1952.1

FIGURE 1. ISL94203EVKIT1Z EVALUATION BOARD

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Key Features

• Status LEDs monitor RGO, EOC, SD and PSD conditions

• Jumper configuration single or split path applications

• Wakeup push button for "Exit Sleep" control

• FETs off push button for quick all FETs off condition

• Cell balance LEDs for MCB process observation

• PCB layout accommodates "solder braid" addition for high

current evaluation

• Software enables real time observation and data collection

of 14 analog measurements and 27 digital status indicators

References

ISL94203

Datasheet

Ordering Information

PART NUMBER

ISL94203EVKIT1Z

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners.

Application Note 1952

DESCRIPTION

Evaluation kit for the ISL94203

Table of Contents

Need help?

Do you have a question about the ISL94203EVKIT1Z and is the answer not in the manual?

Questions and answers

Summary of Contents for Intersil ISL94203EVKIT1Z

Page 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Copyright Intersil Americas LLC 2014, 2015. All Rights Reserved AN1952.1 Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners.
Page 2: What Is Inside
Connect the I C cable from the • Wires to connect power supply to MCB_PS_Z board ISL94203INTFACEKIT1Z board to the ISL94203EVKIT1Z board (J13). • Precision multimeter (optional) Step 9: Open the ISL94203 GUI software. Use the software to • Oscilloscope (optional) read the cell voltages.
Page 3 MCB_PS_Z BOARD FETSOFF MANUAL CONTROL ISL94203EVKIT1Z 6V TO 38V C PORT TO USB-I2C BOARD CELL BALANCE LEDs SET xT2 THERMISTOR TO FET OR TO CELL SET I C ADDR FIGURE 2. ISL94203EVKIT1Z BOARD SETUP Submit Document Feedback AN1952.1 July 30, 2015...
Page 4 TO 1 PATH FETSOFF MANUAL CONTROL I2C PORT 6V TO 38V TO USE USB-I2C BOARD ISL94203EVKIT1Z CELL BALANCE LEDs SET XT2 THERMISTOR TO FET OR TO CELL SET I2C ADDR FIGURE 3. MAIN GUI START-UP WINDOW Submit Document Feedback AN1952.1...
Page 5 Step 3: Click on “Read Pack Settings.” This returns the configuration parameters set in the device. ISL94203EVKIT1Z FIGURE 4. MAIN GUI WINDOW SHOWING PACK SETTINGS Submit Document Feedback AN1952.1 July 30, 2015...
Page 6: Using The Gui
Application Note 1952 Using the GUI indication from the device is shown by the UV and OV status indicators (bottom right of the screen). These indicators come directly from the device status bits. Common Screen Below the CellMIN and CellMAX readings are three boxes that The right side of the GUI shows the status of the ISL94203.
Page 7: Temperature Readings
Application Note 1952 TEMPERATURE READINGS The temperature readings can also be displayed in °C, (see Figure 8). The conversion to °C depends on several items. To the right of the pack voltage values are the temperature First is the gain setting, so the actual input voltage is known. readings, (see Figure 7).
Page 8 Application Note 1952 FIGURE 9. ISL94203 GUI THERMISTOR TAB 0.800 0.700 0.600 0.500 0.400 0.300 0.200 0.100 0.000 TEMPERATURE (°C) FIGURE 10. VOLTAGE TO TEMPERATURE CONVERSION Submit Document Feedback AN1952.1 July 30, 2015...
Page 9: Current Readings
This can be entered into the third current box. The default value is 1Ω, because that is the value on the ISL94203EVKIT1Z board. If the resistor value changes, then this FIGURE 13. FET INDICATORS value can be changed in the GUI (but the default cannot be changed in this revision of the GUI).
Page 10 2x. Access to EEPROM requires an access control bit to be set prior ISL94203EVKIT1Z to a read or write operation. In all of the screens where a button initiates multiple read or write operations, the memory access is automatically set to the correct access code and automatically FIGURE 17.
Page 11 Application Note 1952 An important first step is to select an internal Mux Channel that Therefore, this selection programs the “MUX” blocks connected is going to be measured. By making a selection (clicking on a to the input of the internal AD. Mux selection button, see Figure 19), data collection/graphing...
Page 12 Application Note 1952 MAIN AD FORM TOOLS FIGURE 23. 1. Actual Dual Byte Hex value of AD reading 20. Checking will append latest collection of readings to a file 2. Calculated value based on channel selected 21. Browse to directory location where captured readings will be saved 3.
Page 13 Application Note 1952 The Internal AD Utility form is a separated form that can be closed or minimized independent of the main screen (see Figure 24). To quit the program, click on “Quit”. FIGURE 24. Submit Document Feedback AN1952.1 July 30, 2015...
Page 14 Application Note 1952 Tab Controls As shown in Figure 25, hovering the mouse pointer over the address of a register returns a description of the register. Also, the registers are color coded to match the datasheet and to ISL94203 Memory Access group like registers.
Page 15 Application Note 1952 ISL94203 ISL94203 ISL94203 MAIN SCREEN GUI RAM TAB RAM MEMORY NOTE: “Read Voltages (Single)” or “Read Status Bits” Operation execution steps are numbered. “Write All RAM” writes to the ISL94203 RAM memory, then updates the Main Screen. FIGURE 26.
Page 16: Configuration Memory
Application Note 1952 CONFIGURATION MEMORY To write to individual bytes of the RAM part of the Configuration Memory, set the “RAM Access” in the Memory access box. Each The Configuration Memory consists of two parts, the EEPROM byte in RAM can be written separately. cells and Configuration RAM.
Page 17: User Memory
Application Note 1952 USER MEMORY memory. The user can keep these values or load other data in the GUI boxes. To write the data to the ISL94203 User EEPROM The user memory area is different from the Configuration requires individual writes (click the “EEPROM Memory Access” memory.
Page 18 Application Note 1952 PACK SETTINGS TAB The Pack Settings tab also includes a “Write EEPROM” button. This is a convenience, since it does the same function as the The Pack Settings tab (see Figure 29) provides access to the button in the EEPROM Tab. However, in the Pack Settings tab, it contents of the Configuration RAM, but with “real world”...
Page 19 Application Note 1952 ISL94203 GUI ISL94203 GUI ISL94203 DEVICE ISL94203 DEVICE PACK SETTINGS TAB EEPROM TAB CONFIGURATION RAM EEPROM MEMORY (EEPROM SHADOW MEMORY) (NO USER SHADOW RAM) TRANSLATE COPY COPY COPY FIGURE 30. ISL94203 GUI PACK SETTINGS TAB MEMORY OPERATIONS Submit Document Feedback AN1952.1 July 30, 2015...
Page 20: Voltage Limits
Application Note 1952 VOLTAGE LIMITS CURRENT LIMITS The upper left section of the Pack Settings tab contains the To the right of the voltage settings are the current limits for voltage thresholds and delay times, (see Figure 31). The voltages discharge overcurrent, charge overcurrent, and discharge can be set from 0V to 4.8V.
Page 21: Number Of Cells
Application Note 1952 NUMBER OF CELLS The number of cells box (Figure 34) specifies the number of cells connected to the pack. The number in the box can be lower than the number of cells connected to the pack. This value is a direct representation of the number of cells, it is not the value stored in memory.
Page 22 Application Note 1952 When the TGAIN bit changes from “0” to “1” or “1” to “0”, the GUI CELL BALANCE ENABLE rewrites the values of the temperature limits in the EEPROM tab As part of the Cell balance settings are the Cell Balance controls (based on the temperature input amplifier gain) and sends these for charge, discharge or end-of-charge balancing (see Figure...
Page 23 Application Note 1952 INDIVIDUAL VOLTAGE MONITORING When measuring the current, the gain of the amplifier can be manually set prior to the ADC read by using the drop down box The GUI or an external µC can force a read of any voltage and “W”...
Page 24 Application Note 1952 MICROCONTROLLER DOES... µC CELL BALANCE The next set of controls (Figure 43) allows the GUI (or The GUI/µC can manually control the cell balance operation, microcontroller) to take over several functions of the device. The overriding the internal automatic balancing. Set the “µC Does most general is the “µC Does Scan”...
Page 25 Application Note 1952 FIGURE 46. ISL94203 GUI - DEMO TAB CURRENT DIRECTION DEMO • The device sees that there is no load and no charger, so it clears the fault condition. The “Force Charge Indicator” or “Force Discharge Indicator” controls force the device to indicate a charge or discharge •...
Page 26 ISL94203EVAL1Z NDS7002A - Change resistor values for R83, R84 to 330k reduce current. ROHS xTH1 Therm1 Size Number Revsion ISL94203EVAL1Z ROHS XH103F Date: Nov 12, 2013 Sheet 1 of ROHS File: ISL94203EVAL1Z Drawn by: FIGURE 49. ISL94203EVKIT1Z HARDWARE DESIGN...
Page 27: Bill Of Materials
Application Note 1952 Bill of Materials REFERENCE QTY UNIT DESIGNATOR DESCRIPTION MANUFACTURER MANUFACTURER PART C1, C13-C21 CAP, SMD, 0603, 47nF, 100V, 10%, X7R, ROHS VENKEL C0603X7R101-473KNE C2, C25, C26 CAP, SMD, 0603, 1µF, 50V, 10%, X5R, ROHS C1608X5R1H105K C22, C23 CAP, SMD, 0603, 4700pF, 100V, 10%, X7R, ROHS VENKEL C0603X7R101-472KNE...
Page 28 IC-MULTI-CELL, LI-ION MONITOR, 48P, QFN, 6X6, ROHS INTERSIL ISL94203IRTZ IC-TVS, ESD PROTECTOR, SMD, 6P, SOT-23-6L, 3pF, 6V, ROHS USBLC6-2SC6 MICROELECTRONICS PWB-PCB, ISL94203EVKIT1Z, REVD, ROHS CONNECTORS/HEADERS CONN-HEADER, 4PIN, 2.54mm, RIGHT-ANGLE, ROHS MOLEX 22-05-2041 CONN-HEADER, 1X9, FLAT BRK-AWAY, 2.54mm, R/A, ROHS MOLEX...
Page 29: Hardware Overview
XT2 SELECT Jumpers There are three external thermistors on the board. There are two There are three user selectable options on the ISL94203EVKIT1Z near the battery connectors. These can be used to monitor the board. battery cells (connect external thermistors to connectors xTh1 or Submit Document Feedback AN1952.1...
Page 30: Protection Circuits
Application Note 1952 xTH2a and remove the on-board thermistors Th1 and Th2a). • The 1k resistor can be increased. The limit relates to the There is a third resistor located under the discharge power FET. accuracy of measurement. In the worst case conditions, there is a difference of about 2µA of bias current on the inputs.
Page 31: Led Indicators
VCELL7 VCELL7 VCELL7 VCELL6 VCELL6 VCELL6 VCELL5 VCELL5 VCELL5 VCELL4 VCELL4 VCELL4 VCELL3 VCELL3 VCELL3 VCELL2 VCELL2 VCELL2 VCELL1 VCELL1 VCELL1 VCELL0 VCELL0 VCELL0 FIGURE 55. BATTERY CONNECTION OPTIONS USING THE ISL94203EVKIT1Z BOARD Submit Document Feedback AN1952.1 July 30, 2015...
Page 32 A string of resistors that sets the input ISL94203 Configuration RAM space. voltages, like the Intersil MCB_PS_Z board can have small 4. When I repeatedly read the EEPROM memory in the changes in the input voltage as the ISL94203 samples configuration tab, the communications lock up.
Page 33 FIGURE 59. CFET FALL FIGURE 58. CFET RISE Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the document is current before proceeding.