Renesas ISL9241EVAL1Z User manual

User’s Manual
All information contained in these materials, including products and product specifications,
represents information on the product at the time of publication and is subject to change by
Renesas Electronics Corp. without notice. Please review the latest information published by
Renesas Electronics Corp. through various means, including the Renesas Electronics Corp.
website (http://www.renesas.com).
Rev.3.00
Renesas Electronics Corporation
www.renesas.com
ISL9241EVAL1Z
User’s Manual: Evaluation Board
Battery and Optical
Aug.26.19

UG184 Rev.3.00 Page 2 of 28
Aug.26.19
ISL9241EVAL1Z
Evaluation Board
User’s Manual
The ISL9241 is a configurable buck-boost Narrow Output Voltage DC (NVDC) and Hybrid Power Buck-Boost
(HPBB) combo charger that uses the advanced Renesas R3™ Technology to provide high light-load efficiency,
fast transient response, and seamless DCM/CCM transitions for a variety of mobile and industrial applications.
In Charge mode, the ISL9241 takes input power from a wide range (4V to 20V) of DC power sources (such as
conventional AC/DC charger adapters, USB PD ports, travel adapters) and safely charges battery packs with up
to four cells in a series configuration.
The ISL9241 supports On-the-Go (OTG) functionality for 2-cell and 4-cell battery applications. When OTG
function is enabled, the ISL9241 operates in Reverse Buck mode to provide 5V at the USB port.
Serial communication through SMBus/I2C allows programming of many critical parameters to deliver a
customized solution. These programming parameters include, but are not limited to, adapter current limit, charger
current limit, system voltage setting, and trickle charging current limit.
The ISL9241EVAL1Z evaluation board is designed to demonstrate the performance of the ISL9241. From the
PROG pin to GND, the resistor can be used to program the default value numbers of the battery in series, the
switching frequency, and the adapter current limit charging function. The default value numbers can also be set by
SMBus.
Key Features
• Buck-boost NVDC and HPBB charger for 2-, 3-, and 4-cell Li-ion batteries
• Autonomous End of Charge (EOC) option
• System power monitor PSYS output
• PROCHOT# open-drain output
• Allows trickle charging of depleted battery
• Supplemental power (Intel VMIN active protection)
• Ideal diode control in Turbo mode
• Reverse buck, boost, and buck-boost operation from battery
• Two-level adapter current limit available
• Battery Ship mode option
• SMBus and auto-increment I2C compatible
Specifications
•V
IN = 3.8V to 24V (no dead zone)
•V
OUT = 3.9V to 18.304V
• MAX Icharge up to 6A
Ordering Information
Related Literature
For a full list of related documents, visit our website:
•ISL9241 device page
Part Number Description
ISL9241EVAL1Z ISL9241 buck-boost charger evaluation board

ISL9241EVAL1Z
UG184 Rev.3.00 Page 3 of 28
Aug.26.19
Recommended Equipment
• 0V to 25V power supply with at least 6A source current capability
• Electronic load capable of sinking current up to 6A
• Battery emulator capable of sinking and sourcing current up to 6A
• Digital Multimeters (DMMs)
• 100MHz quad-trace oscilloscope
Note: You can use a power supply (that can source but cannot sink current) in parallel with an e-load Constant
Current (CC) mode to emulate the battery. For example, when charging, set the charging current command lower
than the CC mode e-load. If the e-load CC mode current is set at 3A, the charge current command is 2A and the
e-load takes 2A from the charger and another 1A from the power supply in parallel with it. When discharging, the
power supply acts just like the battery to discharge current. You can also use the e-load Constant Voltage (CV)
mode to emulate the battery to take the charging current from the charger and set the e-load CV voltage below
the MaxSysV register setting. However, this e-load CV mode cannot source current like a battery.
Figure 1. ISL9241EVAL1Z Block Diagram
ISL9241
BOOT1 PHASE1 UGATE1
VDDP
LGATE1 LGATE2 UGATE2 PHASE2 BOOT2
SCL
SDA
VBAT
CSOP
CSON
DCIN
VDD
COMPF
PSYS
BGATE
PROCHOT#
ACOK
GND
CSIP
CSIN
AMON/BMON
VADP
2S-4S
Battery
PROG
CMOUT/INT#
OTGEN/CMIN
Q1
Q2
Q4
Q3
Rs1
Rs2
L1
BATGONE/NTC
NGATE
VSYS
BYPSRC
RTHM
VSYS
VADP
BYPSG
SD
D
BYPSG
BYPSRC
COMPR
RPSYS

ISL9241EVAL1Z 1. Installing the ISL9241 Software
UG184 Rev.3.00 Page 4 of 28
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1. Installing the ISL9241 Software
The ISL9241 Control Software communicates with the ISL9241 controller using the USB to on-board SMBus
Graphical User Interface (GUI). The GUI facilitates access to the ISL9241 SMBus registers.
This section describes how to install, start, and use the GUI.
1.1 Required Hardware
• ISL9241EVAL1Z evaluation board
• USB 2.0 A/B cable
1.2 Required Software
The software Installation Wizard package includes all three required components:
• ISL9241 SMBus Control Tool
• National Instruments Runtime VISA Engine
• USB interface module driver
1.3 Installing the GUI
Both the ISL9241 Control Software and the National Instruments Runtime Engine are installed automatically from
the installation wizard.
Note: Close all other applications before this installation and reboot the computer when the installation is
complete.
1. Extract the zip file to the local drive, not the network drive. The security of the network prohibits the .inf file from
being copied onto the network.
2. Run autorun.exe. The menu in Figure 2 appears.
Figure 2. ISL9241 SMBus Control Tool Installation Wizard

ISL9241EVAL1Z 1. Installing the ISL9241 Software
UG184 Rev.3.00 Page 5 of 28
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3. Click Install ISL9241 SMBus Control Tool.
a. The window shown in Figure 3 appears. Click Next.
Figure 3. ISL9241 Control Software Installer
4. Follow the instructions to accept the two End User License Agreements to complete the software installation.
5. Click Close Menu from the installation wizard.
1.4 Installing the USB Driver
This process explains how to install the SMBus to USB interface driver.
The driver supports Microsoft Vista, Windows 7, Windows 8, and Windows 8.1 operating systems.
Note: If you installed the driver or certificate previously, skip this section.
1. Open the installation wizard package.
2. Navigate to USB-SMBus Driver. Right-click the SMBus-USB-Win10.inf file and select Install.
Note: Install the driver from the local drive. The driver installation fails due to network security if you install from
the network drive.
Figure 4. ISL9241 USB Driver Location

ISL9241EVAL1Z 1. Installing the ISL9241 Software
UG184 Rev.3.00 Page 6 of 28
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3. The message in Figure 5 appears when the driver is successfully installed.
Figure 5. ISL9241 Successful Driver Installation
4. If the installation fails the Digital Signature required in Windows 10 or security settings, complete the following
steps to bypass it.
Note: To complete the process, print and complete the steps below. The system restarts and these instructions
are needed.
5. Open the Command Prompt from the Start menu.
6. Enter the command “shutdown /r /o /f /t 00” in the Command Prompt.
7. Click OK.
8. The system restarts to the Choose an option screen.
9. Select Troubleshoot from the Choose an option screen.
10. Select Advanced options from the Troubleshoot screen.
11. Select Windows Startup Settings from the Advanced options screen.
12. Click Restart.
13. The system restarts to the Advanced Boot Options screen.
14. Select Disable Driver Signature Enforcement.
15. Restart and install the drivers.

ISL9241EVAL1Z 2. Using the GUI
UG184 Rev.3.00 Page 7 of 28
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2. Using the GUI
The ISL9241 SMBus Control Tool Software must be installed to use the evaluation system. Do not connect the
ISL9241EVAL1Z evaluation board to the USB port until installation is complete.
Connect the ISL9241EVAL1Z to a power supply before using the SMBus GUI.
2.1 Setting the USB Connection
Connect the USB cable from the USB of the computer port to the connector J10 of the ISL9241EVAL1Z.
2.2 Starting the GUI
To start the GUI, navigate to the Start menu , then select All Programs → Renesas →
ISL9241 SMBus Control Tool.
Figure 6 shows the GUI.
Figure 6. ISL9241 Graphical User Interface
2.3 Troubleshooting the GUI
Check the status of the USB interface at the top of the GUI. If the USB communication is OK, the USB Interface
status shows a green check mark, as seen in Figure 6.
If the USB Interface status shows a red X, the computer cannot establish the connection. Complete the following
steps to troubleshoot:
1. Make sure the driver files for the USB interface are installed correctly. The driver files are in the USB-I2C Driver
folder.
2. Check the USB cable connections from the ISL9241EVAL1Z to the USB port of the computer.
3. Try different sequences: plug in the ISL9241EVAL1Z first or start the GUI first.
If the problem continues, the USB driver may not be properly installed; therefore, the ISL9241EVAL1Z is not
recognized. See “Installing the USB Driver” on page 5 for driver installation instructions.

ISL9241EVAL1Z 3. Functional Description
UG184 Rev.3.00 Page 8 of 28
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3. Functional Description
The ISL9241EVAL1Z evaluation board provides all circuits required to evaluate the features of the ISL9241. A
majority of the features of the ISL9241 are available on the ISL9241EVAL1Z, such as adjustable output voltage,
On-the-Go (OTG) mode, Trickle Charging mode for a depleted battery, and system power monitor at Buck, Boost,
and Buck-Boost modes. The charger can be controlled through firmware to operate in Hybrid Power Buck-Boost
or Bypass mode. See AN1994, ISL9241 Operation Modes for detailed information about the operation modes.
3.1 Quick Start Guide
The number of battery cell and adapter current limit default values can be configured with a standard 1% 0603
resistor (R23) from the PROG pin to GND. The Prog Pin Programming Options table in the ISL9241 datasheet
shows the programming options. After the default number of cells in series is set, the default values for
MaxSystemVoltage and MinSystemVoltage are set accordingly. These values can also be changed through the
SMBus control registers, which are implemented with the Renesas GUI shown in Figure 8 on page 10.
The three LEDs indicate the ACOK, PROCHOT, and OTGPG/CMOUT status, respectively. For more details about
the functions of these three pins, see the ISL9241 datasheet.
Complete the following steps to evaluate the ISL9241 key functions, including system voltage regulation, input
current limit regulation, Charging mode, trickle Charging mode, and OTG mode. Figure 7 on page 9 shows the top
view of the ISL9241EVAL1Z and highlights the key testing points and connection terminals. For more information
about the ISL9241, including other operation modes, see the ISL9241 datasheet and AN1994.

ISL9241EVAL1Z 3. Functional Description
UG184 Rev.3.00 Page 9 of 28
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3.2 Regulating System Voltage
1. Set the power supply to 5V. With the output disabled, connect the (+) end to J1 and the (-) end to J2.
2. Ensure jumpers JP3, JP4, and JP6 are shorted. SW1 and SW2 should switch to the low position.
3. Turn on the power supply and measure VSYS using the DMM across (+) and (-) TP5. VSYS should read 8.38V.
The current meter on the supply should read <100mA. Increase VIN from 5V to 15V slowly. Monitor PH1 and
PH2 to observe seamless switching from Boost mode to Buck-Boost mode and finally into Buck mode.
3.3 Regulating Input Current Limit
1. Keep VIN as a constant value between 3.8V and 24V. Set the battery emulator voltage to 7.8V and connect the
battery emulator output to battery leads J5 and J6.
2. Turn on the battery emulator; there is no charge and discharge current for the battery, which is consistent with
BGATE FET being off.
Figure 7. ISL9241EVAL1Z Connections
(+) Supply
(-) Supply
USB Port
for SMBus
(+) DMM
(-) DMM
(+) Battery
(-) Battery
BGATELED 1BATGONE
Lead
Lead
Lead
Lead
Lead
Lead
PH1 PH2
LED 2 LED 3

ISL9241EVAL1Z 3. Functional Description
UG184 Rev.3.00 Page 10 of 28
Aug.26.19
3. Add an electrical load on VSYS and GND terminals J3 and J4. Turn on the load and increase the electrical load
slowly; the input current increases correspondingly and VSYS keeps stable at 8.38V. The output voltage
(VSYS) starts dropping as the input current reaches the 0.476A input current limit. For the input current limit
details, see the ISL9241 datasheet. If the VSYS voltage is 150mV lower than the battery voltage, the BGATE
FET turns on at a low voltage level so that the battery supplies the current to the load.
3.4 Configuring the ISL9142EVAL1Z for Charging Mode
1. Set the power supply to a constant value between 3.8V and 24V, then complete Steps 1 and 2 in “Regulating
System Voltage” on page 9. Make sure the input current does not exceed the limit.
2. Set the battery emulator voltage to 7.8V and connect the battery emulator output to battery leads J5 and J6.
3. Connect the USB cable at the USB port for the SMBus. LED1, 2, and 3 all turn on.
4. Turn on the power supply; LED3 goes out. Turn on the battery emulator and open the Renesas ISL9241 GUI
(Figure 8).
Note: A green check mark in the USB Interface status indicates the GUI is ready to communicate with the
ISL9241EVAL1Z. If the USB Interface shows a red X, the GUI is not ready to communicate with the
ISL9241EVAL1Z. Click the Reset USB button until a green check mark appears in the USB Interface. If the
green check mark does not appear, check the USB connection. See “Troubleshooting the GUI” on page 7 for
troubleshooting information.
5. Select 2 Cell in the No of Battery Cell section and click the Write All button. All controller register values are
set to the default values correspondingly. The system voltage is 8.4V, which is the value of MaxSysVoltage in
the GUI. There is no charge and discharge current for the battery. Set the minimum system voltage
(MinSysVoltage) to a non zero value. Change the charge current limit (ChargeCurrentLimit) from 0A to 2A
and click Write. The battery is now in 2A current charge operation. The charge current value can be monitored
in the GUI by clicking Read in the ChargeCurrentLimit column. Monitor the BGATE signal status to confirm
the battery is in Charging mode.
6. To turn on charging (trickle and fast/normal), set the MinSysVoltage register and the ChargeCurrentLimit
register to non-zero values.
Figure 8. ISL9241 GUI

ISL9241EVAL1Z 3. Functional Description
UG184 Rev.3.00 Page 11 of 28
Aug.26.19
Note: Make sure the input current does not reach the input current limit value, especially for a small VIN input.
3.5 Configuring the ISL9241EVAL1Z for Trickle Charging Mode
1. Complete steps 1 through 5 in Configuring the ISL9142EVAL1Z for Charging Mode without any changes. Set
the MinSysVoltage register and the ChargeCurrentLimit register to non-zero values.
2. Decrease the battery emulator voltage and monitor the battery charging current. If the battery emulator voltage
is less than 5.2V (lower than MinSysVoltage), the battery enters trickle Charging mode and the charge current
decreases to 0.26A. The trickle charge current value can be changed through the SMBus control registers (see
the ISL9241 datasheet).
Note: Make sure the input current does not reach the input current limit value, especially for small VIN input.
3.6 Configuring the ISL9241EVAL1Z for OTG Mode
1. Set the battery emulator voltage at a constant value between 5.8V and 15V. Connect battery leads J5 and J6
with the output disabled.
2. Connect an electric load on supply leads J1 and J2 with the output disabled.
3. Connect the USB cable at the USB port for SMBus. Only LED1 is on. Turn on the battery emulator and electrical
load without adding any load.
4. Open the ISL9241 GUI. OTGVoltage is the voltage value for the load side, as shown in Figure 9, and
OTGCurrent is the OTG output current limit at the load side. You can set these values as needed within the
output limit range. See the ISL9241 datasheet for the limit ranges.
5. Select the Control0 & 1 Registers tab.
6. In the Control1 Register column, select 1: Enable in OTG Function to enable OTG, then click Write. See
Figure 10 on page 12.
Figure 9. OTGVoltage and OTGCurrent Settings in GUI

ISL9241EVAL1Z 3. Functional Description
UG184 Rev.3.00 Page 12 of 28
Aug.26.19
7. Switch SW2 on the evaluation board to the HI position. The load voltage is regulated as an OTGVoltage value,
set in Step 4. LED3 is on, indicating the OTG function is enabled.
8. Increase the electrical load slowly and monitor the load voltage. If the load current is less than the OTGCurrent
limit value, the load voltage is regulated at the setting value.
3.7 Configuring the ISL9241EVAL1Z for Bypass Mode
See AN1994 for information about how to transition between different NVDC and Bypass modes. The document
also provides steps on how to enable charging in each mode and how to allow the battery to supplement the
adapter in Bypass mode (reverse turbo boost).
3.8 Supplemental Mode (Intel VMIN Active Protection)
See AN1994 for information about how to enter Supplemental mode (Intel VMIN active protection).
Figure 10. Enabling OTG Function

ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 13 of 28
Aug.26.19
4. PCB Layout Guidelines
This section provides real examples of PCB layouts. The guidance is specific to board implementation, indicates
key techniques used, and highlights areas that affect both functionality and performance.
4.1 ISL9241EVAL1Z Evaluation Board
Figure 11. ISL9241EVAL1Z Evaluation Board (Top)

ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 14 of 28
Aug.26.19
Figure 12. ISL9241EVAL1Z Evaluation Board (Bottom)

ISL9241EVAL1Z 4. PCB Layout Guidelines UG184 Rev.3.00 Page 15 of 28 Aug.26.19
4.2 ISL9241EVAL1Z Schematic
Figure 13. Schematic
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SDA, SCL, ACOK, PROCHOT#, BATGONE, OTGPG/CMOUT, OTGEN
all have 3V3 or VDD pull up options
All NFETs and PFETs are 3x3 size
For battery connector connection
Make Solder connection to Drain
(Pin 6-8 and 5 (all Drain pins) for PMOS on ISL9238
Pin 6-8 and 5 (all Drain pins) for NMOS on ISL9241)
Place these components close to the IC
FOR ISL9238, MAKE SOLDER CONNECTION
FOR ISL9238, POPULATE COMPONENTS IN ORANGE
FOR ISL9241, POPULATE COMPONENTS IN GREEN
When Bypass FETs are not populated, do not leave BYPSRC floating
Connect it with 0 ohm resistor to VDD
Do not populate if Q12_41 and Q13_41 are present
Optional - Additional short circuit protection
- Add 1 more 22uF (C19) for OTGVoltage >5V (reverse mode)
- Add 15uF bulk cap (C98) to support >30W load
in reverse mode (USB PD)
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ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 16 of 28
Aug.26.19
4.3 Bill of Materials
Qty Reference Designator Description Manufacturer Manufacturer Part Number
1 ISL9241EVAL1Z REVD PWB-PCB, ISL9241EVAL1Z,
REVD, ROHS
Imagineering ISL9241EVAL1Z REVC PCB
1 U1 IC-NOTEBOOK BATTERY
CHARGER, 32P, QFN, 4x4,
ROHS
Renesas ISL9241HRZ
1 C43 CAP, SMD, 0603, 10pF, 50V, 10%,
NP0, ROHS
Kemet C0603C100K5GACTU
2 C45, C82 CAP, SMD, 0603, 1000pF, 16V,
10%, X7R, ROHS
AVX 0603YC102KAT2A
3 C84, C85, C86 CAP, SMD, 0603, 0.1µF, 25V,
10%, X7R, ROHS
Murata GRM188R71E104KA01D
5 C5, C6, C37, C81, C83 CAP, SMD, 0603, 1µF, 25V, 10%,
X5R, ROHS
Murata GRM188R61E105KA12D
2 C30, C36 CAP,SMD,0603,0.47uF,25V,10%,
X7R,ROHS
TDK C1608X7R1E474K080AE
1 C46 CAP, SMD, 0603, 0.022µF, 25V,
10%, X7R, ROHS
Kemet C0603C223K3RACTU
1 C99_41 CAP, SMD, 0603, 0.047µF, 25V,
10%, X7R, ROHS
Kemet C0603C473K3RACTU
3 C32, C33, C26 CAP, SMD, 0603, 4.7µF, 10V,
10%, X5R, ROHS
Kemet C0603C475K8PACTU
1 C31 CAP,SMD,0603, 4.7uF,
35V,10%,X5R,ROHS
Murata GRM188R6YA475KE15D
15 C7-C14, C16, C20, C21, C22,
C23, C24, C25
CAP, SMD,0805, 22µF, 25V, 10%,
X5R, ROHS
Murata GRM21BR61E226ME44L
2 C40, C41 CAP, SMD, 0805, 10µF, 25V, 10%,
X5R, ROHS
TDK C2012X5R1E106K
4 C1, C2, C3, C4 CAP-POSCAP, SMD, B case,
15µF, 25V, 20%, 100MΩ, ROHS
Sanyo 25TQC15MYFB
1 L1 PWR CHOKE COIL, SMD, 10x10,
2.2µH, 10A, 20%, ROHS
Cyntec Co., Ltd. PEUE102T-2R2MS
6 J1, J3, J5, J2, J4, J6 CONN BANANA JACK
THREADED 12AWG
Cinch Connectivity 108-0740-102
3 TP50, TP55, TP49 Turret Binding Post Keystone 1514-2
2 TP68, TP69 CONN-SCOPE PROBE TEST PT,
COMPACT, PCB MNT, ROHS
Tektronix 131-4353-00
2 TP66, TP67 CONN-SCOPE PROBE TEST PT,
COMPACT, PCB MNT, ROHS
Tektronix 131-5031-00
56 TP1-TP12, TP15-TP37, TP43-
TP48, TP51-TP54, TP56-TP60,
TP62, TP70-TP73, TP75
CONN-MINI TEST POINT,
VERTICAL, WHITE, ROHS
Keystone 5002
1 J10 CONN-USB MINI-B
RECEPTACLE, TH, 5CIRCUIT,
R/A, ROHS
Molex 54819-0519
1 JP6 CONN-HEADER, 1x3,
BREAKAWY 1x36, 2.54mm,
ROHS
Berg/FCI 68000-236HLF
4 JP3, JP4, JP5, JP7 CONN-HEADER, 1x2,
RETENTIVE, 2.54mm, 0.230x
0.120, ROHS"
Berg/FCI 69190-202HLF

ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 17 of 28
Aug.26.19
3 JP3, JP4, JP6-Pins 1-2 CONN-JUMPER, SHORTING,
2PIN, BLACK, GOLD, ROHS
Sullins SPC02SYAN
1 D1 DIODE-RECTIFIER, SMD,
SOT23, 30V, 200mA, DUAL
DIODE, ROHS
Diodes Incorporated BAT54C-7-F
3 LED1, LED2, LED3 LED, SMD, 1206, GREEN, 75mW,
3mcd, 567nm, ROHS
Dialight 597-3311-407NF
1 U2 IC-USB MICROCONTROLLER,
32P, LQFP, PROGRAMMED,
ROHS
Silicon Laboratories C8051F320-GQ
(Programmed in Palm Bay)
1 U3 IC-ADJ.V, 1A LDO REGULATOR,
10P, DFN, 3X3, ROHS
Renesas ISL80101IRAJZ
3 Q8, Q9, Q10 TRANSISTOR, N-CHANNEL,
3LD, SOT-23, 60V, 115mA, ROHS
Diodes Incorporated 2N7002-7-F
4 Q1, Q2, Q3, Q4 TRANSISTOR-MOS,
N-CHANNEL, 8P, PWRPAK, 30V,
20A, ROHS
Vishay SISA14DN-T1-GE3
2 Q11_41, Q14_41 TRANSISTOR-MOS,
N-CHANNEL, 8P,
PWRPAK 1212-8, 30V, 25A,
ROHS
Vishay SISA12ADN-T1-GE3
2 Q12_41, Q13_41 TRANSISTOR-MOS,
N-CHANNEL, 8P, 5x6, 30V, 30A,
ROHS
Alpha & Omega
Semiconductor Inc.
AON6414A
2 R1, R14 RES, SMD, 0603, 2Ω, 1/10W, 1%,
TF, ROHS
Yageo RC0603FR-072RL
1 R7 RES, SMD, 0603, 10Ω, 1/10W,
1%, TF, ROHS
Yageo RC0603FR-0710RL
1 R8 RES, SMD, 0603, 4.7Ω, 1/10W,
1%, TF, ROHS
Yageo RC0603FR-074R7L
1 RT1 NTC, THERMISTOR, 10kΩ, 1%,
0603, ROHS
Murata NCP18XH103F03RB
22 R2, R6, R10, R11, R21, R22,
R24, R40, R41, R42, R43, R84,
R85, R86, R89, R90, R91, R92,
R96_41, R93_41, R94_41,
R95_41
RES, SMD, 0603, 0Ω, 1/10W, TF,
ROHS
Yageo RC0603JR-070RL
4 R83, R87, R88, R27 RES, SMD, 0603, 1k, 1/10W, 1%,
TF, ROHS
Yageo RC0603FR-071KL
1 R97_41 RES, SMD, 0603, 1k, 1/10W, 1%,
TF, ROHS
Yageo RC0603FR-071KL
6 R15, R16, R36, R38, R39, R81 RES, SMD, 0603, 10k, 1/10W,
1%, TF, ROHS
Yageo RC0603FR-0710KL
3 R28, R31, R45 RES, SMD, 0603, 100k, 1/10W,
1%, TF, ROHS
Yageo RC0603JR-07100KL
1 R13 RES, SMD, 0603, 806Ω, 1/10W,
1%, TF, ROHS
Yageo RC0603FR-07806RL
3 R32, R33, R34 RES, SMD, 0603, 220Ω,
1/10W,1%, TF, ROHS
Yageo RC0603FR-07220RL
1 R82 RES, SMD, 0603, 5.62k, 1/10W,
1%, TF, ROHS
Panasonic ERJ-3EKF5621V
1 R25 RES, SMD, 0603, 20k, 1/10W,
1%, TF, ROHS
Yageo RC0603FR-0720KL
Qty Reference Designator Description Manufacturer Manufacturer Part Number

ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 18 of 28
Aug.26.19
1 RS2 RES-CURR.SENSE, SMD, 1206,
0.01Ω, 1W, 1%, 75ppm, ROHS
Vishay/Dale WSLP1206R0100FEA
1 RS1 RES-CURR.SENSE, SMD, 1206,
0.02Ω, 1W, 1%, 75ppm, ROHS
Vishay/Dale WSLP1206R0200FEA
2 SW1,SW2 SWITCH-TOGGLE, SMD, 6PIN,
SPDT, 2POS, ON-NONE-ON,
ROHS
ITT Industries/C&K Division GT11MSCBE
4 Four corners SCREW,4-40X1/4in, PHILLIPS,
PANHEAD, STAINLESS, ROHS
Building Fasteners PMSSS 440 0025 PH
4 Four corners STANDOFF,4-40X3/4in, F/F, HEX,
ALUMINUM, 0.25 OD, ROHS
Keystone 2204
1 Place assy in bag BAG, STATIC, 5x8, ZIPLOC,
ROHS
Renesas 212403-013
0 L2 Do Not Populate or Purchase
0 R3, R35, R37, R4_38, R5_38,
R12_38, R23_38, R9_38, R93,
R98_41, R94_38, R99_42, R94,
R95
Do Not Populate or Purchase
0 TP38-TP42 Do Not Populate or Purchase
0 C18, C19, C25, C27, C28, C29,
C34, C35, C42, C87, C98,
C98_41, C38_38, C44, C88-
C97, C100, C101, C102
Do Not Populate or Purchase
0 Q6_38, Q7_38, Q11_38 Do Not Populate or Purchase
0 D4 Do Not Populate or Purchase
1 Affix to Back of PCB LABEL-DATE CODE_LINE 1:
YRWK/REV#, LINE 2: BOM
NAME
Renesas LABEL-DATE CODE
1 Rename PCB to:
ISL9241EVAL1Z REV E
LABEL, TO RENAME BOARD Renesas LABEL-RENAME BOARD
Table 1. Guidelines for PCB Layout
Pin # Pin Name Layout Guidelines
Bottom
Pad
GND Connect this ground pad to the ground plane through a low impedance path. Renesas recommends using at
least five vias to connect to ground planes in the PCB to ensure sufficient thermal dissipation directly under the
IC.
1 CSON Run two dedicated traces with sufficient width in parallel (close to each other to minimize the loop area) from the
two terminals of the battery current-sensing resistor to the IC. Place the differential mode and common-mode RC
filter components in the general proximity of the controller.
Route the current-sensing traces through vias to connect the center of the pads or route the traces into the pads
from the inside of the current-sensing resistor. The following drawings show the two preferred ways of routing
current-sensing traces.
2CSOP
3 NGATE Switching pin. Run the NGATE trace to the NGATE N-type MOSFET Gate node. Use sufficient width. Do not
allow any sensitive analog signal traces to cross over or get close.
Qty Reference Designator Description Manufacturer Manufacturer Part Number
Current-Sensing Traces
Vias
Current-Sensing Traces

ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 19 of 28
Aug.26.19
4 BOOT2 Switching pin. Place the bootstrap capacitor in the general proximity of the controller. Use a sufficiently wide
trace. Do not allow any sensitive analog signal traces to cross over or get close.
5 UGATE2 Run these two traces in parallel with sufficient width. Do not allow any sensitive analog signal traces to cross over
or get close. Renesas recommends routing the PHASE2 trace to the high-side MOSFET source pin instead of
general copper.
Place the IC close to the gate terminals of the switching MOSFETs and keep the gate drive signal traces short for
a clean MOSFET drive. The IC can be placed on the opposite side of the switching MOSFETs.
Place the output capacitors as close as possible to the switching high-side MOSFET drain and the low-side
MOSFET source. Use the shortest PCB trace connection. Place these capacitors on the same PCB layer as the
MOSFETs instead of on different layers and using vias to make the connection.
Place the inductor terminal to the switching high-side MOSFET drain and low-side MOSFET source terminal as
close as possible. Minimize this phase node area to reduce the electrical and magnetic field radiation but make
this phase node area large enough to carry the current. Place the inductor and the switching MOSFETs on the
same layer of the PCB.
6 PHASE2
7 LGATE2 Switching pin. Run the LGATE2 trace in parallel with the UGATE2 and PHASE2 traces on the same PCB layer.
Use sufficient width. Do not allow any sensitive analog signal traces to cross over or get close.
8 VDDP Place the decoupling capacitor in the general proximity of the controller. Run the trace connecting to the VDD pin
with sufficient width.
9 LGATE1 Switching pin. Run the LGATE1 trace in parallel with the UGATE1 and PHASE1 traces on the same PCB layer.
Use sufficient width. Do not allow any sensitive analog signal traces to cross over or get close.
10 PHASE1 Run these two traces in parallel with sufficient width. Do not allow any sensitive analog signal traces to cross over
or get close. Renesas recommends routing the PHASE1 trace to the high-side MOSFET source pin instead of
general copper.
Place the IC close to the gate terminals of the switching MOSFETs and keep the gate drive signal traces short for
a clean MOSFET drive. The IC can be placed on the opposite side of the switching MOSFETs.
Place the input capacitors as close as possible to the switching high-side MOSFET drain and the low-side
MOSFET source. Use the shortest PCB trace connection. Place these capacitors on the same PCB layer as the
MOSFETs instead of on different layers and using vias to make the connection.
Place the inductor terminal to the switching high-side MOSFET drain and low-side MOSFET source terminal as
close as possible. Minimize this phase node area to reduce the electrical and magnetic field radiation but make
this phase node area large enough to carry the current. Place the inductor and the switching MOSFETs on the
same layer of the PCB.
11 UGATE1
12 BOOT1 Switching pin. Place the bootstrap capacitor in the general proximity of the controller. Use a sufficiently wide
trace. Do not allow any sensitive analog signal traces to cross over or get close.
13 BYPSRC Run this trace with sufficient width to the bypass N-type MOSFET Sources/reference node.
14 CSIN Run two dedicated traces with sufficient width in parallel (close to each other to minimize the loop area) from the
two terminals of the adapter current-sensing resistor to the IC. Place the Differential mode and common-mode
RC filter components in the general proximity of the controller. Keep the CSIN node near the Q1 drain.
Route the current-sensing traces through vias to connect the center of the pads or route the traces into the pads
from the inside of the current-sensing resistor. The following drawings show the two preferred ways of routing
current-sensing traces.
15 CSIP
16 BYPSG Run this trace with sufficient width to the bypass N-type MOSFET Gates
17 DCIN Place the OR diodes and the RC filter in the general proximity of the controller. Run the VADP trace and VSYS
trace to the OR diodes with sufficient width.
18 VDD Place the RC filter connecting with the VDDP pin in the general proximity of the controller. Run the trace
connecting to VDDP pin with sufficient width.
19 PROG Signal pin. Place the PROG programming resistor in the general proximity of the controller.
20 OTGEN/CMIN Digital pins. No special consideration.
Table 1. Guidelines for PCB Layout (Continued)
Pin # Pin Name Layout Guidelines
Current-Sensing Traces
Vias
Current-Sensing Traces

ISL9241EVAL1Z 4. PCB Layout Guidelines
UG184 Rev.3.00 Page 20 of 28
Aug.26.19
4.4 Board Layout
21 SDA Digital pins. No special consideration. Run the SDA and SCL traces in parallel.
22 SCL
23 PROCHOT# Digital pin, open-drain output. No special consideration.
24 ACOK Digital pin, open-drain output. No special consideration.
25 BATGONE/NTC Digital pin (BATGONE), analog pin (NTC). Place the 10kΩ resistor series in the BATGONE signal trace and the
optional decoupling capacitor in the general proximity of the controller.
26 CMOUT/INT# Digital pin, open-drain output. No special consideration.
27 COMPR Place the compensation components in the general proximity of the controller. Do not allow any switching signal
to cross over or get close.
28 COMPF Place the compensation components in the general proximity of the controller. Do not allow any switching signal
to cross over or get close.
29 AMON/BMON No special consideration. Place the optional RC filter in the general proximity of the controller.
30 PSYS(REFADJ) Signal pin, current source output. No special consideration. REFADJ is an analog signal pin for output voltage
feedback. Place near the controller and run a dedicated trace for each resistor divider node (TOP, MIDDLE, and
BOTTOM). Do not inject noise or additional capacitance.
31 VBAT Place the optional RC filter in the general proximity of the controller. Run a dedicated trace from the battery
positive connection point to the IC.
32 BGATE Use a sufficiently wide trace from the IC to the BGATE N-type MOSFET gate. Place the capacitor from BGATE to
ground close to the MOSFET.
Figure 14. Silkscreen Top Layer
Table 1. Guidelines for PCB Layout (Continued)
Pin # Pin Name Layout Guidelines