Renesas ISL78226EVKIT1Z User manual

Rev.4.00 Jun 7, 2019
User’s Manual
ISL78226EVKIT1Z, ISL78224EVKIT2Z
Evaluation Kits and Software User Manual
Automotive Group

UG073 Rev.4.00 Page 2 of 105
Jun 7, 2019
UG073
Rev.4.00
Jun 7, 2019
ISL78226EVKIT1Z, ISL78224EVKIT2Z
Evaluation Kits and Software User Guide
USER’S MANUAL
1. Overview
This user guide enables you to quickly install the software, set up and configure the hardware, use the hardware with
the ISLUSBADAPT-EVZ dongle, and use the software to read and write to the ISL78226 and ISL78224 data registers.
This guide includes step-by-step setup instructions for the software and hardware, an overview of software operation,
and a detailed description of the software functions. Operation is similar for both the ISL78226 and ISL78224. This
guide describes the operation of the ISL78226. Details specific to the ISL78224 are highlighted and discussed.
The ISL78226 and ISL78224 software enables control and observation of register settings and functional status of the
controllers. It works primarily through a USB to I2C interface dongle that enables logic (GPIO) control of discrete pins
of the controllers.
This software allows you to interact and evaluate all aspects of the ISL78226 and ISL78224 PWM controllers. It is
designed to enable you to quickly configure register settings and mode selections. The approximately 60 control
selections are programmable at the register hex level or from user-selectable combo controls in the software. The
software can also poll more than 70 alert and operation indicators.
1.1 Software Key Features
•I
2C/PMBus compatible digital interface
• Read/write registers using direct hex or human translated interface elements
• Quick access control of EN and PWM_EN pins
• Functional combo box selection of more than 60 control register setting selections
• Direct hex read of fault and status registers
• Functional display of faults and operating status
• File-based save and recall of control register values
• User-selectable automatic startup options
1.2 Specifications
The ISL78226EVKIT1Z and ISL78224EVKIT2Z are configured and optimized for the following operating
conditions:
•V
IN = 5V to 64V
• BAT12 = 12V
• BAT48 = 48V
• VIN_FLY = 5V to 64V
• Efficiency = >95%, 12V at 100A, Buck mode input at 48V
1.3 Related Literature
For a full list of related documents visit our website:
•ISL78226 and ISL78224 product pages
1.4 Ordering Information
Part Number Description
ISL78226EVKIT1Z Evaluation kit for the ISL78226 6-phase PWM controller
ISL78224EVKIT2Z Evaluation kit for the ISL78224 4-phase PWM controller

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Jun 7, 2019
ISL78226EVKIT1Z, ISL78224EVKIT2Z 1. Overview
1.5 Kit Contents
The evaluation kit contains:
• ISL78226EVAL1Z or ISL78224EVAL2Z evaluation board
• ISLUSBADAPT-EVZ REV A USB to I2C interface kit
•USBcable,I
2C cable (four wires), and GPIO cable (11 wires)
Figure 1. ISL78226 Simplified Typical Application Schematic
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UG073 Rev.4.00 Page 4 of 105
Jun 7, 2019
ISL78226EVKIT1Z, ISL78224EVKIT2Z 1. Overview
Figure 2. ISL78224 Simplified Typical Application Schematic
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Jun 7, 2019
ISL78226EVKIT1Z, ISL78224EVKIT2Z 1. Overview
Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Software Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Related Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Quick Start Videos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Quick Hardware Setup Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Installing the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.5 Connecting Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4. Overview - Using the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1 Quick Access Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2 Understanding Device Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.3 Tab Overviews . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5. Using the Software - Detailed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2 Control Regs (Hex) Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3 Control Registers Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.4 Status Regs (Hex) Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.5 Alert Display Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.6 Config & Status Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6. Alternate Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.1 Buck Operation of the ISL78224EVAL2Z without Flyback and with the GUI. . . . . . . . . . . . . . . . . 41
6.2 Buck operation of the ISL78224EVAL2Z without flyback and without GPIO from the GUI . . . . . . 42
6.3 Boost Operation of the ISL78224EVAL2Z without Flyback and with the GUI . . . . . . . . . . . . . . . . 43
6.4 Boost Operation of the ISL78224EVAL2Z without Flyback and without GPIO from the GUI. . . . . 44
6.5 Buck Operation of the ISL78226EVAL1Z without Flyback and with the GUI. . . . . . . . . . . . . . . . . 45
6.6 Buck Operation of the ISL78226EVAL1Z without Flyback and without GPIO from the GUI . . . . . 46
6.7 Boost Operation of the ISL78226EVAL1Z without Flyback and with the GUI . . . . . . . . . . . . . . . . 47
6.8 Boost Operation of the ISL78226EVAL1Z without Flyback and without GPIO from the GUI. . . . . 48
7. PCB Layout Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.1 Maximum Operating Power for Evaluation Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.2 Evaluation Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3 ISL78226EVAL1Z Circuit Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.4 ISL78224EVAL2Z Circuit Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.5 ISLUSBADAPT-EVZ Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
7.6 ISL78226EVAL1Z Bill of Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.7 ISL78224EVAL2Z Bill of Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
7.8 ISL78226EVAL1Z Board Layout (Six Layers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
7.9 ISL78224EVAL2Z Board Layout (Eight Layers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
8. Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
8.1 Gain Phase Plots, Buck and Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
8.2 Efficiency Curves, Buck and Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
9. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 2. Quick Start Videos
2. Quick Start Videos
The following quick start videos explain how to load the software and describe the basic functionality of the software.
The titles of the videos are:
•ISL78226 PWM Controller Webinar
•Automotive 6-Phase Bidirectional PWM Controller Video
•ISL78226EVAL1Z: Software and Hardware
•ISL78226EVKIT1Z: Phase Dropping and Tracking

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
3. Functional Description
These boards can be used to boost 12V to 48V or buck from 48V to 12V. Use the software to program fault conditions
and control the status of the board.
3.1 Operating Range
•V
IN voltage operating conditions: 6V to 64V
• BAT12 voltage: 6V to 40V
• BAT48 voltage: 48V to 64V (72V if VIN is not driven by BAT48)
The size of the inductors enables the ISL78226 board to deliver 3kW of power with forced air. The ISL78224 board
delivers 2kW of power with forced air. Monitor the temperature of the FETs and provide air flow as needed. See
“Maximum Operating Power for Evaluation Boards” on page 50 for more information about the operating range.
3.2 Getting Started
The software was developed on a 64-bit Windows 8 platform. Because the software registers as a Human Interface
Device (HID) and uses standard HID calls, it works on Windows 7 and Windows XP operating systems or later
(32-bit and 64-bit).
This user guide contains screenshots of the software at the time it was written. Subsequent software versions can
appear differently.
3.3 Quick Hardware Setup Guide
The hardware must be connected to a computer through the USB cable for the software to start. Figure 3 shows the
connection of the cables to the USB to I2C board.
Figure 3. Connection of Cables to the USB to I2C Board
From PC
To J74
To J77
Black
Wires
Black
Wires

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
Figure 4 shows the connection of the cables on the ISL78226EVAL1Z REV A evaluation board. Pin 1 of the I2C
cable is connected to J74 and is marked with a white line on the connector. The GPIO cable is connected to J77.
Figure 5 shows the connection of the cables on the ISL78224EVAL2Z Rev A evaluation board. Pin 1 of the I2C
cable is connected to J74 and is marked with a white line on the connector. The GPIO cable is connected to J77.
.
Figure 4. Connecting Cables to the ISL78226EVAL1Z
Figure 5. Connecting Cables to the ISL78224EVAL2Z
J74 The white line
indicates Pin 1
12V 12V
5V GND
GND
The white line
indicates Pin 1
J74
Pin 1
J77

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
3.4 Installing the Software
(1) Download the software from the Renesas website. The screen in Figure 6 appears.
(2) Click Run and approve the request to download the software. The Setup Wizard screen in Figure 7 appears.
(3) Click Next and select the location to save the file. The default location is C:\Users\Public\ISL78226. Click
Browse to save the file in a different location. When finished, click Next.
Figure 6. Download Screen
Figure 7. Setup Wizard
Figure 8. Setup Wizard

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(4) The Startup menu folder appears. Click Browse to save the shortcut in a different location. When finished,
click Next.
(5) To create a desktop icon, check the box next to Create a desktop icon and click Next.
(6) Click Install to install the software.
Figure 9. Select Destination Location
Figure 10. Select Destination Location
Figure 11. Select Destination Location

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(7) To launch the software, check the box next to Launch ISL78226 and click Finish. The installation is now
complete. Restart your computer if instructed to do so.
(8) Select either ISL78226 Ready: Proceed to Standard Demo or ISL78224 Ready: Proceed to Standard
Demo from the drop-down menu.
(a) Figure 13 shows the ISL78226 startup screen.
Figure 12. Select Destination Location
Figure 13. Software Startup Screen (ISL78226 Selected)

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(b) Figure 14 shows the ISL78224 startup screen.
(c) The flashing green bars indicate connections to the board. When the device under test is selected, the screen
in Figure 15 on page 13 appears. The Quick Access Control Panel to the right in Figure 15 provides quick
access to enable and disable the part, select either Buck or Boost operation, turn on the PWM, select either
DE or CCM operation mode of operation, set the fault response to Hiccup or Latch, check fault registers,
clear all faults, and automatically update the status of changes made in the Control and Observation panels.
Figure 14. Software Startup Screen (ISL78224 Selected)

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
3.5 Connecting Hardware
3.5.1 Buck Mode
Caution: This is a high power application board. Renesas recommends disabling the part through the software
and turning off all supplies before making connections to the board. Failure to do this could damage the board.
(1) Verify that the computer is connected to the USB to I2C board and the evaluation board.
(a) See Figures 3 and 4for the ISL78226EVAL1Z setup.
(b) See Figures 3 and 5for the ISL78224EVAL2Z setup.
(2) Verify the jumper connections in Table 1. Note: Jumpers not listed in the table are not populated. Some of
these “jumpers” are measurement terminals and cannot tolerate being shorted.
Figure 15. Software Status Screen with Control and Observation Panel and Quick Access Control Panel
Table 1. Jumper Configuration
Jumper ID Device Action Function
J14 ISL78226 Installed BAT48 Bode Injection,
Jumper for normal operation
TP23 ISL78224 Installed
J15 ISL78226 Installed BAT12 Bode Injection,
Jumper for normal operation
TP24 ISL78224 Installed
J20 Pin 2 connected to
J21 Pin 2
ISL78226 Installed Short ISET to ISHARE,
Jumper for master only operation
ISL78224 NA
J26 ISL78226 Installed MCUVDD Bode Injection,
Jumper for normal operation
ISL78224 Not Used
Quick Access Control Panel
Control and Observation Panel

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(3) Connect the 48V supply or battery to one or more of the BAT48 connectors. See Figure 55 for ISL78226
connections and Figure 56 for ISL78224 connections. Note: the PCB connects all BAT48 phases together
and all BAT48 PGNDs together. For high power evaluations, Renesas recommends connecting the 48V
supply or battery to all six phases for distribution of power across the board.
(4) Connect a DC electronic load or a 12V battery to one or more of the BAT12 connectors. See Figure 55 for
ISL78226 connections and Figure 56 for ISL78224 connections. Note: the PCB connects all BAT12
phases together and all BAT12 PGNDs together. For high power evaluations, Renesas recommends
connecting the DC electronic load or a 12V battery to all six phases for distribution of power across the
board.
(5) Connect a 12V supply to the VIN and VIN_FLY with its ground connected to FLYGND.
(6) Connect a 5V supply to BAT12_IN with its ground connected to DGND. See Figure 55 for ISL78226
connections and Figure 56 for ISL78224 connections.
J35 ISL78226 Switch PD_CTRL
Switch toward BAT48 (Phase drop ON)
Switch toward BAT12 (Phase drop OFF)
J1ISL78224 No Jumper Phase drop ON
Installed Phase drop OFF
J63 ISL78226 Installed Disable VIN voltage clamp
ISL78224 N/A
J70 ISL78226 No Jumper BT/BK Control
Remove for software operation
ISL78224 No Jumper
J71 ISL78226 Installed 1-2 PWM_TRI
Enable tri-state driver operation
ISL78224 N/A
J80 ISL78226 Installed 2-3 TRACK
ISL78224 Installed 2-3
J81 ISL78226 Installed 2-3 ADDR1
Configures as master
ISL78224 N/A
J82 ISL78226 Installed 2-3 ADDR2
Configures as master
ISL78224 N/A
J88 ISL78226 No Jumper DE/CCM
Remove for software operation
ISL78224 No Jumper
J89 ISL78226 No Jumper HIC/LAT
Remove for software operation
ISL78224 No Jumper
JP310 ISL78226 Installed Jumper to enable Phase 3
ISL78224 N/A
JP410 ISL78226 Installed Jumper to enable Phase 4
ISL78224 N/A
JP510 ISL78226 Installed Jumper to enable Phase 5
ISL78224 N/A
JP610 ISL78226 Installed Jumper to enable Phase 6
ISL78224 N/A
Table 1. Jumper Configuration (Continued)
Jumper ID Device Action Function

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(7) Connect the probes to the evaluation board. Use the connections shown in Table 2 and Figure 16
(ISL78226) or Figure 17 (ISL78224). Note: Renesas recommends disabling the part through the software
and turning off all supplies before making connections to the board.
(a) (ISL78226) Use the connections shown in Figure 16 and Table 2.
(b) (ISL78224) Use the connections shown in Figure 17 and Table 3 on page 16.
Figure 16. ISL78226 Scope Probe Connections
Table 2. ISL78226 Probe Connections to Monitor Phase Voltages
Jumper Phase
29 1
31 2
34 3
37 4
40 5
44 6
Figure 17. ISL78224 Scope Probe Connections
J 29
GNDGNDGNDGND
PH 1PH 2
PH 3PH 4PH 5PH 6 GNDGND
J 31
J 34 J 37 J 40 J 44
GND
TP26
TP27
TP28
TP29

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(8) Turn on the 12V supplies, 5V supplies, and the 48V supply (with no particular power supply sequence).
(9) The first time you power up the board after configuring the board for the Buck mode operation, verify the
operation is set to Buck mode.
(a) In the software, navigate to the Quick Access Control Panel under Mode Pin Selection.
(b) Select Buck mode from the BT/BK drop-down menu.
(c) Click the Enable button at the top of the Quick Access Control Panel. The indicator next to the Enable
button turns red.
(d) Verify the flyback circuit is working by measuring the voltages at V6 and V12 (see Figure 55 for ISL78226
connections and Figure 56 for ISL78224 connections). V6 should measure about 6V and V12 around 12V.
If the V6 and V12 measurements are correct, the controller is running and providing the proper clock signal
to the flyback circuit. If the measurements are correct, proceed to Step 10.
If the V6 and V12 measurements are not correct, disable the part through the software, turn off all the
supplies, and recheck all the connections.
(10) To automatically start the converter, click the Read Startup Files Options button shown in Figure 18.
This loads the startup.csv file in the project directory that specifies startup options that set initial device
settings. Note: You can manually edit the file.
(11) Click Execute Startup. The program sets the initial device registers as well as the GUI controls and value
windows.
Table 3. ISL78224 Probe Connections to Monitor Phase Voltages
Jumper Phase
TP26 1
TP27 2
TP28 3
TP29 4
N/A 5
N/A 6
Figure 18. Read Startup File Options

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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(12) Observe the Startup Running window for several seconds.
Figure 19. Execute Startup
Figure 20. Startup Running

UG073 Rev.4.00 Page 18 of 105
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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(13) Wait for the “Startup Completed” message to display. The setup process takes a few seconds to complete.
3.5.2 Boost Mode
Caution: This is a high power application board. Renesas recommends disabling through the software and
turning off all supplies before making connections to the board. Failure to do this could damage the board.
(1) Verify that the computer is connected to the USB to I2C board and the evaluation board
(a) See Figures 3 and 4for the ISL78226EVAL1Z setup.
(b) See Figures 3 and 5for the ISL78224EVAL2Z setup.
(2) Verify the jumper connections in Table 4. Note: Jumpers not listed in the table are not populated. Some
“jumpers” are measurement terminals and do not tolerate being shorted.
Figure 21. Startup Completed
Table 4. Jumper Configuration
Jumper ID Device Action Function
J14 ISL78226 Installed BAT48 Bode Injection,
Jumper for normal operation
TP23 ISL78224 Installed
J15 ISL78226 Installed BAT12 Bode Injection,
Jumper for normal operation
TP24 ISL78224 Installed
J20 Pin 2 connected
to J21 Pin 2
ISL78226 Installed Short ISET to ISHARE,
Jumper for master only operation
ISL78224 N/A
J26 ISL78226 Installed MCUVDD Bode Injection,
Jumper for normal operation
ISL78224 N/A
J35 ISL78226 Switch PD_CTRL,
Switch toward BAT48 (Phase drop ON)
Switch toward BAT12 (Phase drop OFF)
J1ISL78224 Jumper PD_CTRL,
Jumper for no Phase drop
No jumper for Phase drop
J1ISL78224 Jumper Phase drop OFF
No Jumper Phase drop ON

UG073 Rev.4.00 Page 19 of 105
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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(3) Connect the DC electronic load or 48V battery to one or more of the BAT48 connectors. See Figure 55 for
ISL78226 connections and Figure 56 for ISL78224 connections. Note: the PCB connects all BAT48
phases together and all BAT48 PGNDs together. For high power evaluations, Renesas recommends
connecting the 48V load or battery to all six phases for distribution of power across the board.
(4) Connect a 12V supply or battery to one or more of the BAT12 connectors. See Figure 55 for ISL78226
connections and Figure 56 for ISL78224 connections. Note: the PCB connects all BAT12 phases together
and all BAT12 PGNDs together. For high power evaluations, Renesas recommends connecting the 12V
supply or battery to all six phases for distribution of power across the board.
(5) Connect a 12V supply to the VIN and VIN_FLY with its ground connected to FLYGND. Disconnect the
5V supply from BAT12_IN if it was previously connected. See Figure 55 for ISL78226 connections and
Figure 56 for ISL78224 connections. The evaluation board has a diode to prevent the reverse current
flowing from the BAT12 supply to the 5V supply so the 5V supply can be safely disconnected. A normal
application circuit has a 12V battery for precharge and the BAT12_IN voltage is not required.
(6) Connect probes as shown in Table 2 and Figure 16 or 17. Note: Renesas recommends disabling the part
through the software and turning off all supplies before making connections to the board.
(7) Turn on the 12V supplies, 5V supplies, and the 48V supply (no particular power supply sequence).
J63 ISL78226 Installed Disable VIN voltage clamp
ISL78224 N/A
J70 ISL78226 No Jumper BT/BK Control
Remove for software operation
ISL78224 No Jumper
J71 ISL78226 Installed 1-2 PWM_TRI
Enable tri-state driver operation
ISL78224 N/A
J80 ISL78226 Installed 2-3 TRACK
ISL78224 Installed 2-3
J81 ISL78226 Installed 2-3 ADDR1
Configures as master
ISL78224 N/A
J82 ISL78226 Installed 2-3 ADDR2
Configures as master
ISL78224 N/A
J88 ISL78226 No Jumper DE/CCM
Remove for software operation
ISL78224 No Jumper
J89 ISL78226 No Jumper HIC/LAT
Remove for software operation
ISL78224 No Jumper
JP310 ISL78226 Installed Jumper to enable Phase 3
ISL78224 N/A
JP410 ISL78226 Installed Jumper to enable Phase 4
ISL78224 N/A
JP510 ISL78226 Installed Jumper to enable Phase 5
ISL78224 N/A
JP610 ISL78226 Installed Jumper to enable Phase 6
ISL78224 N/A
Table 4. Jumper Configuration (Continued)
Jumper ID Device Action Function

UG073 Rev.4.00 Page 20 of 105
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ISL78226EVKIT1Z, ISL78224EVKIT2Z 3. Functional Description
(8) The first time you power up the board after configuring the board for Boost mode operation, verify the
operation is set to Boost mode.
(a) In the software, navigate to the Quick Access Control Panel under Mode Pin Selection.
(b) Select Boost mode from the BT/BK drop-down menu.
(c) Click the Enable button at the top of the Quick Access Control Panel. The indicator next to the Enable
button turns red.
(d) Verify the flyback circuit is working by measuring the voltages at V6 and V12 (see Figure 55 for ISL78226
connections and Figure 56 for ISL78224 connections). V6 should measure about 6V and V12 should
measure around 12V. If the V6 and V12 measurements are correct, the controller is running and providing
the proper clock signal to the flyback circuit. If the measurements are correct, proceed to Step 9.
(9) To automatically start the converter, click the Read Startup Files Options button shown in Figure 22.
This loads the startup.csv file in the project directory that specifies startup options that set initial device
settings. Note: You can manually edit the file.
Figure 22. Read Startup File Options