Intersil ISL9238EVAL1Z Manual de usuario

USER’S MANUAL

UG074

Rev.2.00

Nov 14, 2018

ISL9238EVAL1Z

Evaluation Board User Guide

UG074 Rev.2.00 Page 1 of 17

Nov 14, 2018

Description

The ISL9238is a buck-boost Narrow Output Voltage DC (NVDC)

charger that uses the Renesas advanced 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 ISL9238 takes input power from a wide

range (4V to 20V) of DC power sources (conventional AC/DC

charger adapters, USB PD ports, travel adapters, etc.) and

safely charges battery packs with up to four cells in a series

configuration.

The ISL9238 has an On-the-Go (OTG) function for 2- and 4-cell

battery applications. When the OTG function is enabled, the

ISL9238 operates in Reverse Buck mode to provide 5V at the

USB port.

The ISL9238 provides serial communication with SMBus/I2C

that allows programming of critical parameters to deliver a

customized solution. The programmable parameters include,

but are not limited to: adapter current limit, charger current

limit, system voltage setting, and trickle charging current limit.

The ISL9238EVAL1Z evaluation board demonstrates the

performance of the ISL9238. The default value numbers of the

battery in series, switching frequency, and the adapter current

limit charging function can be programmed by the resistor

from the PROG pin to GND. The values also can be set by

SMBus.

Related Literature

For a full list of related documents, refer to our website:

•ISL9238datasheet

Key Features

• Buck-boost NVDC charger for 1-, 2-, 3-, 4-cell Li-ion batteries

• End of Charge (EOC) option

• System power monitor PSYS output, IMVP-8 compliant

• PROCHOT# open-drain output, IMVP-8 compliant

• Allows trickle charging of depleted battery

• Optional ASGATE FET control

• 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 = 2.5V to 12.6V

•MAXI

charge up to 6A

•f

SW = 1MHz maximum

Ordering Information

PART NUMBER DESCRIPTION

ISL9238EVAL1Z ISL9238 buck-boost charger evaluation board

FIGURE 1. BLOCK DIAGRAM

ISL9238

BOOT1

PHASE1

UGATE1

VDDP

LGATE1

LGATE2

UGATE2

PHASE2

BOOT2

SCL

SDA

VBAT

CSOP

CSON

DCIN

VDD

COMP

PSYS

BGATE

ASGATE

PROCHOT#

ACIN

ACOK

GND

CSIP

CSIN

AMON/BMON

BATGONE

VADP

VBAT

VSYS

PROG

VSYS

OTGPG/CMOUT

ADP

OTGEN/CMIN

Rs1

Rs2

Optio nal

UG074 Rev.2.00 Page 2 of 17

Nov 14, 2018

ISL9238EVAL1Z

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

• Digital Multimeters (DMMs)

• 100MHz quad-trace oscilloscope

NOTE: You can use a power supply (that can source current but cannot

sink current) in parallel with an e-load Constant Current (CC) mode to

emulate the battery. For example, to charge, set the charging current

command lower than the CC mode e-load. If the e-load CC mode current

is set to 3A, the charge current command is 2A, and the e-load takes 2A

from the charger and takes another 1A from the power supply in parallel

with it. To discharge, the power supply acts 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.

Functional Description

The ISL9238EVAL1Z provides all circuits required to evaluate the

features of the ISL9238. A majority of the features of the

ISL9238, such as adjustable output voltage, On-the-Go (OTG)

mode, Trickle Charging mode for depleted battery, and system

power monitor at Buck, Boost, and Buck-Boost modes are

available on this evaluation board.

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 ISL9238 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 in the Renesas GUI,

shown in Figure 2 on page 3.

The three LEDs indicate the ACOK, PROCHOT, and

OTGPG/CMOUT status, respectively. For more details about the

functions of these three pins, refer to the ISL9238 datasheet.

Complete the following steps to evaluate the ISL9238 key

functions,including system voltage regulation, input current limit

regulation, Charging mode, trickle Charging mode, and OTG

mode. Figure 3 shows the top view of the evaluation board and

highlights the key testing points and connection terminals. For

more information about the ISL9238, including other modes of

operation, refer to the ISL9238 datasheet.

System Voltage Regulation

1. Set the power supply to 5V. Disable the output and 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.Slowly increase

VIN from 5V to 15V. Monitor PH1 and PH2 to observe

seamless switching from Boost mode to Buck-Boost mode

and finally into Buck mode.

Input Current Limit Regulation

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. Turn on the

battery emulator; there is no charge and discharge current for

the battery, which is consistent with the BGATE signal of a

high voltage level.

2. 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 1.5A input current limit. Refer

to the ISL9238 datasheet for more information about the

input current limit. 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.

UG074 Rev.2.00 Page 3 of 17

Nov 14, 2018

ISL9238EVAL1Z

FIGURE 2. GUI SNAPSHOT

FIGURE 3. EVALUATION BOARD CONNECTION GUIDELINE

(+) SUPPLY

(-) SUPPLY

USB PORT

FOR SMBus

PH1 PH2 (+) DMM

(-) DMM

(+) BATTERY

(-) BATTERY

BGATE

LED 1, 2, 3

BATGONE

LEAD

UG074 Rev.2.00 Page 4 of 17

Nov 14, 2018

ISL9238EVAL1Z

Charging Mode

1. Set the power supply to a constant value between 3.8V and

24V, then complete Steps 1 and 2 in “System Voltage

Regulation” on page 2. Make sure the input current does not

reach 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. LED 1,

2, and 3 all turn on.

4. Turn on the power supply; LED 3 turns off. Turn on the battery

emulator and open the ISL9238 GUI (shown in Figure 2 on

page 3).

Note: A green check mark in the USB Interface section of

the GUI indicates the GUI is ready to communicate with the

evaluation board. A red X in the USB Interface section

indicates the GUI is not ready to communicate with the

evaluation board. Click the Reset USB button until a green

check mark shows in the USB Interface. If a green check mark

does not appear, check the USB connection.

5. Select 2 Cell in the Battery Cell Configuration 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.

6. Change the ChargeCurrentLimit from 0A to 2A and click the

Write button. The battery is now in a 2A current charge

configuration. The charge current value can be monitored in

the GUI by clicking the Read button in the ChargeCurrentLimit

section.Monitor the BGATE signal status to confirm the

battery is in Charging mode.

Note: Make sure the input current does not reach the input

current limit value, especially for a small VIN input.

Trickle Charging Mode

1. Complete Steps 1 through 6 in “Charging Mode”without any

changes.

2. Decrease the battery emulator voltage and monitor the

battery charging current. As long as the battery emulator

voltage is less than 5.2V (lower than SystemMinVoltage), 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. Refer to the

ISL9238 datasheet for more information.

Note: Make sure the input current does not reach the input

current limit value, especially for small VIN input.

OTG Mode

1. Set the battery emulator voltage to a constant value between

5.8V and 15V. Connect battery leads J5 and J6 with the output

disabled.

2. Connect the electric load on supply leads J1 and J2 with the

output disabled.

3. Connect the USB cable at the USB port for SMBus. Only the

LED 1 light is on. Turn on the battery emulator and electrical

load without adding any load.

4. Open the ISL9238 GUI. The OTGVoltage is the voltage value

for the load side, as shown in Figure 4 on page 5. The

OTGCurrent is the OTG output current limit at the load side.

These values can be set as needed within the output limit

range. Refer to the ISL9238 datasheet for the OTGVoltage

and OTGCurrent value ranges.

5. Select the Control0 & 1 Registers tab, enable the OTG

function in Control1 Register, and click the Write button, as

shown in Figure 5 on page 5.

6. Switch SW2 on the evaluation board to the HI position. The

load voltage is regulated as an OTGVoltage value, set in

Figure 4 on page 5, and the LED 3 light is on, indicating the

OTG function is enabled.

7. Increase the electrical load slowly and monitor the load

voltage. As long as the load current is less than the

OTGCurrent limit value, the load voltage is regulated at the set

value.

UG074 Rev.2.00 Page 5 of 17

Nov 14, 2018

ISL9238EVAL1Z

FIGURE 4. OTGVOLTAGE AND OTGCURRENT SETTINGS IN THE GUI

FIGURE 5. OTG FUNCTION ENABLE

UG074 Rev.2.00 Page 6 of 17

Nov 14, 2018

ISL9238EVAL1Z

ISL9238EVAL1Z Schematic

FIGURE 6. ISL9238EVAL1Z BOARD SCHEMATIC

FOR NO ASGATE OPTION

SDA, SCL, ACOK, PROCHOT#, BATGONE, OTGPG/CMOUT, OTGEN

all have 3V3 or VDD pull up options

For battery connector connection

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UG074 Rev.2.00 Page 7 of 17

Nov 14, 2018

ISL9238EVAL1Z

FIGURE 7. TOP OF BOARD

FIGURE 8. BOTTOM OF BOARD

UG074 Rev.2.00 Page 8 of 17

Nov 14, 2018

ISL9238EVAL1Z

Bill of Materials

QTY

REFERENCE

DESIGNATOR DESCRIPTION MANUFACTURER MANUFACTURER PART

1 SEE LABEL-RENAME BOARD PWB-PCB, ISL9237EVAL1Z, REVB, ROHS IMAGINEERING INC ISL9237EVAL1ZREVBPCB

4 C1, C2, C3, C4 CAP-POSCAP, SMD, 7.3x4.3x1.9, 47µF, 20V,

20%, 55mΩ, ROHS

SANYO 20TQC47MYF

1 C43 CAP, SMD, 0603, 10pF, 50V, 10%, NP0, ROHS VENKEL C0603COG500-100KDE

2 C45, C82 CAP, SMD, 0603, 1000pF, 16V, 10%, X7R, ROHS VENKEL C0603X7R160102KNE

4 C38, C84, C85, C86 CAP, SMD, 0603, 0.1µF, 25V, 10%, X7R, ROHS MURATA GRM188R71E104KA01D

9 C5, C6, C28, C29, C31, C34, C35, C81,

C83

CAP, SMD, 0603, 1µF, 25V, 10%, X5R, ROHS MURATA GRM188R61E105KA12D

1 C46 CAP, SMD, 0603, 0.022µF, 25V, 10%, X7R, ROHS MURATA GRM188R71E223KA01J

2 C30, C36 CAP, SMD, 0603, 0.22µF, 25V, 10%, X7R, ROHS TDK C1608X7R1E224K

1 C42 CAP, SMD, 0603, 4700pF, 16V, 10%, X7R, ROHS VENKEL C0603X7R160-472KNE

4 C26, C32, C33, C37 CAP, SMD, 0603, 4.7µF, 10V, 10%, X5R, ROHS VENKEL CR0603-16W-4701FT

0 C87 CAP, SMD, 0603, DNP-PLACE HOLDER, ROHS

17 C7-C16, C18, C21, C22, C23, C24, C40,

C41

CAP, SMD, 0805, 10µF, 25V, 10%, X5R, ROHS TDK C2012X5R1E106K

1 L1 PWR CHOKE COIL, SMD, 6.95x6.6, 2.2µH, 10A,

20%, ROHS

CYNTEC CO., LTD. PIMB063T-2R2MS-01

3 J1, J3, J5 CONN-GEN, BIND.POST, INSUL-RED, THMBNUT-

GND

JOHNSON

COMPONENTS

111-0702-001

3 J2, J4, J6 CONN-GEN, BIND.POST, INSUL-BLK,

THMBNUT-GND

JOHNSON

COMPONENTS

111-0703-001

2 TP13, TP14 CONN-SCOPE PROBE TEST PT, COMPACT, PCB

MNT, ROHS

TEKTRONIX 131-4353-00

51 TP1-TP12, TP15-TP37, TP43-TP58 CONN-MINI TEST POINT, VERTICAL, WHITE, ROHS KEYSTONE 5002

1 J10 CONN-USB MINI-B RECEPTACLE, TH, 5 CIRCUIT,

R/A, ROHS

MOLEX 54819-0519

1 JP6 CONN-HEADER, 1x3, BREAKAWY 1x36, 2.54mm,

ROHS

BERG/FCI 68000-236HLF

3 JP3, JP4, JP5 CONN-HEADER, 1x2, RETENTIVE, 2.54mm,

0.230x0.120, ROHS

BERG/FCI 69190-202HLF

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

BAT54C-7-F-T

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

1 U3 IC-ADJ.V, 1A LDO REGULATOR, 10P, DFN, 3x3,

ROHS

RENESAS ISL80101IRAJZ

1 U1 IC-NOTEBOOK BATTERY CHARGER, 32P, QFN,

4x4, ROHS

RENESAS ISL9238HRTZ

3 Q8, Q9, Q10 TRANSISTOR, N-CHANNEL, 3LD, SOT-23, 60V,

115mA, ROHS

DIODES, INC. 2N7002-7-F

UG074 Rev.2.00 Page 9 of 17

Nov 14, 2018

ISL9238EVAL1Z

3 Q5, Q6, Q7 (ALT: SISS27DN-T1-GE3-T) TRANSISTOR-MOS, P-CHANNEL, -30V, -35A, 8P,

PWRPAK, ROHS

VISHAY SI7625DN-T1-GE3

4 Q1, Q2, Q3, Q4 TRANSISTOR-MOS, N-CHANNEL, 8P, PWRPAK,

30V, 20A, ROHS

VISHAY SISA14DN-T1-GE3

5 R1, R2, R7, R10, R14 RES, SMD, 0603, 2Ω, 1/10W, 1%, TF, ROHS YAGEO 9C06031A2R00FGHFT

1 R8 RES, SMD, 0603, 4.7Ω, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-4R70FT

17 R4, R5, R6, R11, R12, R24, R40, R41,

R42, R43, R84, R85, R86, R89, R90,

R91, R92

RES, SMD, 0603, 0Ω, 1/10W, TF, ROHS VENKEL CR0603-10W-000T

4 R22, R83, R87, R88 RES, SMD, 0603, 1k, 1/10W, 1%, TF, ROHS PANASONIC ERJ-3EKF1001V

6 R15, R16, R36, R38, R39, R81 RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-1002FT

6 R13, R21, R28, R31, R44, R45 RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-1003FT

1 R23 RES, SMD, 0603, 133k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-1333FT

3 R32, R33, R34 RES, SMD, 0603, 220Ω, 1/10W, 1%, TF, ROHS YAGEO RC0603FR-07220RL

1 R9 RES, SMD, 0603, 402k, 1/16W, 1%, TF, ROHS PANASONIC ERJ-3EKF4023V

1 R82 RES, SMD, 0603, 5.62k, 1/10W, 1%, TF, ROHS PANASONIC ERJ-3EKF5621V

1 R25 RES, SMD, 0603, 6.04k, 1/10W, 1%, TF, ROHS VENKEL CR0603-10W-6041FT

1 R27 RES, SMD, 0603, 698Ω, 1/10W, 1%, TF, ROHS PANASONIC ERJ-3EKF6980V

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 assembly in bag BAG, STATIC, 5x8, ZIPLOC, ROHS RENESAS 212403-013

0 C19, C20, C25, C27, C39, C44,

C88-C97

DO NOT POPULATE OR PURCHASE

0 JP1, JP2 DO NOT POPULATE OR PURCHASE

0 L2 DO NOT POPULATE OR PURCHASE

0 R3, R35, R37 DO NOT POPULATE OR PURCHASE

0 TP38-TP42 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: ISL9238EVAL1Z. LABEL, TO RENAME BOARD RENESAS LABEL-RENAME BOARD

Bill of Materials

QTY

REFERENCE

DESIGNATOR DESCRIPTION MANUFACTURER MANUFACTURER PART

UG074 Rev.2.00 Page 10 of 17

Nov 14, 2018

ISL9238EVAL1Z

PCB Layout Guidelines

PIN NUMBER PIN NAME LAYOUT GUIDELINES

BOTTOM PAD

GND Connect the ground pad to the ground plane through a low impedance path. Use at least five vias to connect to the

ground planes in the PCB to ensure sufficient thermal dissipation directly under the IC.

1 CSON Run two dedicated traces with sufficient width parallel to (close to each other to minimize the loop area) 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 VSYS Signal pin that provides feedback for the system bus voltage. Place the optional RC filter in the general proximity of

the controller. Run a dedicated trace from the system bus to the pin and do not route near the switching traces. Do

not share the same trace with the signal routing to the DCIN pin OR diodes.

4 BOOT2 Switching pin. Place the bootstrap capacitor in the general proximity of the controller. Use sufficiently wide trace. Do

not allow any sensitive analog signal traces to cross over or get close to this pin.

5 UGATE2 Run the UGATE2 and PHASE2 traces in parallel with sufficient width. Do not allow any sensitive analog signal traces

to cross over or get close to this pin. Renesas recommends routing the PHASE2 trace to the high-side MOSFET source

pin instead of general copper.

Place the IC close to the switching MOSFET’s gate terminals 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 the 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 lower 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.

6PHASE2

7 LGATE2 Switching pin. Run the LGATE2 trace parallel to 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 to this pin.

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 parallel to 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 to this pin.

CURRENT-SENSING TRACES

VIAS

CURRENT-SENSING TRACES

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