Renesas ISL9237EVAL2Z Manuale utente

USER’S MANUAL

UG075

Rev 3.00

November 4, 2016

ISL9237EVAL2Z

Evaluation Board User Guide

UG075 Rev 3.00 Page 1 of 17

November 4, 2016

Description

The ISL9237 is a buck-boost Narrow Output Voltage DC (NVDC)

charger utilizing Intersil’s 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 ISL9237 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 three cells in a series

configuration.

The ISL9237 supports On-the-Go (OTG) function for 2- and

3-cell battery applications. When OTG function is enabled, the

ISL9237 operates in Reverse Buck mode to provide 5V at the

USB port.

The ISL9237 has serial communication via SMBus/I2C that

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 ISL9237EVAL2Z evaluation board is designed to

demonstrate the performance of the ISL9237. The default

value numbers of the battery in series, the switching

frequency, and the adapter current limit charging function can

be programmed by the resistor from the PROG pin to GND.

Those values also can be set by SMBus.

Related Literature

• For a full list of related documents please visit our website

-ISL9237 product page

Key Features

• Buck-boost NVDC charger for 1-, 2-, 3-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

ISL9237EVAL2Z ISL9237 buck-boost charger evaluation board

FIGURE 1. BLOCK DIAGRAM

ISL9237

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

OPTIONAL

UG075 Rev 3.00 Page 2 of 17

November 4, 2016

ISL9237EVAL2Z

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: Customers can use a power supply (which can source but cannot

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

emulate the battery. For example, for 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, then the e-load will take

2A from the charger and take another 1A from the power supply in

parallel with it. For discharging, the power supply is just like the battery to

discharge current. The user 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.

Software Requirement

The ISL9237 evaluation board needs to be used with the required

software. The ISL9237 evaluation kit software can be found on

our website.

ISL9237 evaluation kit software consists of the ISL9237

evaluation software, SMBus USB driver README file, and the

software installation guide.

Functional Description

The ISL9237EVAL2Z provides all circuits that are required to

evaluate the features of the ISL9237. A majority of the features

of the ISL9237, 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 resisor (R23)

from the PROG pin to GND. The “PROG PIN PROGRAMMING

OPTIONS” table in the ISL9237 datasheet shows the

programming options. After the default number of cells in series

are 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 Intersil GUI, shown in Figure 2 on page 3.

Three LEDs are indicating ACOK, PROCHOT, and OTGPG/CMOUT

status, respectively. For more details about the functions of these

three pins, refer to the ISL9237 datasheet. Follow these steps to

evaluate the ISL9237 key functions,including system voltage

regulation, input current limit regulation, Charging mode, Trickle

Charging mode, and OTG mode. Figure 3, which is the top view of

the evaluation board, highlights the key testing points and

connection terminals. For other modes or more information

about ISL9237, please refer to the ISL9237 datasheet.

System Voltage Regulation

1. Set the power supply to 5V and, with the output disabled,

connect the (+) 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, 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.

Input Current Limit Regulation

1. Keep VIN as a constant value between 3.8V and 24V. Set the

battery emulator voltage to 7.8V, connect the battery

emulator output to battery leads, J5 and J6. Then, turn on the

battery emulator; there is no charge and discharge current for

the battery, which is consistent to 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) will start dropping

as the input current reaches the 1.5A input current limit. For

the input current limit details, refer to the ISL9237 datasheet.

If the VSYS voltage is 150mV lower than the battery voltage,

BGATE FET will turn on at a low voltage level, such that the

battery supplies the current to the load.

UG075 Rev 3.00 Page 3 of 17

November 4, 2016

ISL9237EVAL2Z

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

UG075 Rev 3.00 Page 4 of 17

November 4, 2016

ISL9237EVAL2Z

Charging Mode

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

24V, then do Steps 1 and 2 in “System Voltage Regulation” on

page 2. Make sure the input current does not hit the limit.

2. Set the battery emulator voltage to 7.8V; connect the battery

emulator output to battery leads, J5 and J6.

3. Connect the USB cable at USB port for the SMBus; LED 1, 2,

and 3 are all lighting.

4. Turn on the power supply; LED 3 goes out. Then turn on the

battery emulator and open Intersil ISL9237 GUI (Figure 2 on

page 3). Note: The USB interface with a green tick means the

GUI is ready to communicate with the evaluation board. If the

USB interface shows a red cross, the GUI is not ready to

communicate with the evaluation board. Click the “reset USB”

button until a green tick shows in the USB interface. If not

green, check the USB connection.

5. Select “2 Cell” and click the “Write All” button, all controller

The system voltage is 8.4V, which is the value of

MaxSystemVoltage in the GUI. There is no charge and

discharge current for battery. Change the

“ChargeCurrentLimit” from 0A to 2A then click the “Write”

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

The charge current value can be monitored in the GUI by

clicking the “Read” button in the ChargeCurrentLimit column.

Monitor the BGATE signal status to confirm 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. Do steps 1 through 5 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

ISL9237 datasheet.

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 at a constant value between

5.8V and 15V; connect the battery leads, J5 and J6, with the

output disabled.

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

output disabled.

3. Connect the USB cable at the USB port for SMBus; only LED 1

light is on. Turn on the battery emulator and electrical load

without adding any load.

4. Open the Intersil ISL9237 GUI, The OTGVoltage is the voltage

value for load side, as shown in Figure 4 on page 5, and the

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

values can be set as needed by the customer, within the

output limit range. For their value range, please refer to the

ISL9237 datasheet.

5. Select the “Control1&2 registers” tab, enable the OTG

function at Control1 register, then 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 5, and the LED 3 light is on, which means 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 will be regulated at

the setting value.

UG075 Rev 3.00 Page 5 of 17

November 4, 2016

ISL9237EVAL2Z

FIGURE 4. OTG VOLTAGE AND CURRENT SETTING IN GUI

FIGURE 5. OTG FUNCTION ENABLE

UG075 Rev 3.00 Page 6 of 17

November 4, 2016

ISL9237EVAL2Z

ISL9237EVAL2Z Schematic

FIGURE 6. ISL9237EVAL2Z BOARD SCHEMATIC

 

FOR NO ASGATE OPTION

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

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UG075 Rev 3.00 Page 7 of 17

November 4, 2016

ISL9237EVAL2Z

FIGURE 7. TOP OF BOARD

FIGURE 8. BOTTOM OF BOARD

UG075 Rev 3.00 Page 8 of 17

November 4, 2016

ISL9237EVAL2Z

Bill of Materials

MANUFACTURER PART QTY UNITS REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER

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

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

ROHS

VENKEL

C0603X7R160102KNE 2 ea. C45, C82 CAP, SMD, 0603, 1000pF, 16V, 10%, X7R,

ROHS

VENKEL

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

ROHS

MURATA

GRM188R61E105KA12D 7 ea. C5, C6, C26, C31, C37, C81, C83 CAP, SMD, 0603, 1µF, 25V, 10%, X5R,

ROHS

MURATA

C1608X7R1E224K 2 ea. C30, C36 CAP, SMD, 0603, 0.22µF, 25V, 10%, X7R,

ROHS

TDK

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

ROHS

VENKEL

GRM188R71E473KA01D 1 ea. C46 CAP, SMD, 0603, 0.047µF, 25V, 10%, X7R,

ROHS

MURATA

C0603X5R100-475KNE 2 ea. C32, C33 CAP, SMD, 0603, 4.7µF, 10V, 10%, X5R,

ROHS

VENKEL

0 ea. C87 CAP, SMD, 0603, DNP-PLACE HOLDER,

ROHS

C2012X5R1E106K 17 ea. C7-C16, C18, C21, C22, C23,

C24, C40, C41

CAP, SMD, 0805, 10µF, 25V, 10%, X5R,

ROHS

TDK

16TQC68MYF 3 ea. C2, C3, C4 CAP-POSCAP, SMD, 7.3x4.3, 68µF, 16V,

20%, 50mΩ, ROHS

SANYO

PIMB063T-2R2MS-01 1 ea. L1 PWR CHOKE COIL, SMD, 6.95x6.6, 2.2µH,

10A, 20%, ROHS

CYNTEC CO., LTD.

111-0702-001 3 ea. J1, J3, J5 CONN-GEN, BIND.POST, INSUL-RED,

THMBNUT-GND

JOHNSON COMPONENTS

111-0703-001 3 ea. J2, J4, J6 CONN-GEN, BIND.POST, INSUL-BLK,

THMBNUT-GND

JOHNSON COMPONENTS

131-4353-00 2 ea. TP13, TP14 CONN-SCOPE PROBE TEST PT, COMPACT,

PCB MNT, ROHS

TEKTRONIX

5002 51 ea. TP1-TP12, TP15-TP37,

TP43-TP58

CONN-MINI TEST POINT, VERTICAL, WHITE,

ROHS

KEYSTONE

54819-0519 1 ea. J10 CONN-USB MINI-B RECEPTACLE, TH,

5CIRCUIT, R/A, ROHS

MOLEX

68000-236HLF 1 ea. JP6 CONN-HEADER, 1x3, BREAKAWY 1x36,

2.54mm, ROHS

BERG/FCI

69190-202HLF 3 ea. JP3, JP4, JP5 CONN-HEADER, 1x2, RETENTIVE, 2.54mm,

0.230x0.120, ROHS

BERG/FCI

SPC02SYAN 3 ea. JP3, JP4, JP6-Pins 1-2 CONN-JUMPER, SHORTING, 2PIN, BLACK,

GOLD, ROHS

SULLINS

1 ea. D1 DIODE-RECTIFIER, SMD, SOT23, 30V,

200mA, DUAL DIODE, ROHS

597-3311-407NF 3 ea. LED1, LED2, LED3 LED, SMD, 1206, GREEN, 75mW, 3mcd,

567nm, ROHS

DIALIGHT

C8051F320-GQ 1 ea. U2 IC-USB MICROCONTROLLER, 32P, LQFP,

PROGRAMMED, ROHS

SILICON LABORATORIES

UG075 Rev 3.00 Page 9 of 17

November 4, 2016

ISL9237EVAL2Z

ISL80101IRAJZ 1 ea. U3 IC-ADJ.V, 1A LDO REGULATOR, 10P, DFN,

3x3, ROHS

INTERSIL

ISL9237HRZ 1 ea. U1 IC-NOTEBOOK BATTERY CHARGER, 32P,

QFN, 4x4, ROHS

INTERSIL

2N7002-7-F 3 ea. Q8, Q9, Q10 TRANSISTOR, N-CHANNEL, 3LD, SOT-23,

60V, 115mA, ROHS

DIODES, INC.

SI7625DN-T1-GE3 3 ea. Q5, Q6, Q7

(ALT: SISS27DN-T1-GE3-T)

TRANSIST-MOS, P-CHANNEL, -30V, -35A,

8P, PWRPAK, ROHS

VISHAY

SISA14DN-T1-GE3 4 ea. Q1, Q2, Q3, Q4 TRANSISTOR-MOS, N-CHANNEL, 8P,

PWRPAK, 30V, 20A, ROHS

VISHAY

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

ROHS

YAGEO

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

ROHS

VENKEL

CR0603-10W-000T 18 ea. R4, R5, R6, R11, R12, R22, R24,

R40, R41, R42, R43, R84, R85,

R86, R89, R90, R91, R92

RES, SMD, 0603, 0Ω, 1/10W, TF, ROHS VENKEL

ERJ-3EKF1001V 4 ea. R27, R83, R87, R88 RES, SMD, 0603, 1k, 1/10W, 1%, TF,

ROHS

PANASONIC

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

ROHS

VENKEL

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

ROHS

VENKEL

1 ea. R23 RES, SMD, 0603, 143k, 1/10W, 1%, TF,

ROHS

RC0603FR-07220RL 3 ea. R32, R33, R34 RES, SMD, 0603, 220Ω, 1/10W, 1%, F,

ROHS

YAGEO

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

ROHS

PANASONIC

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

ROHS

PANASONIC

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

ROHS

VENKEL

WSLP1206R0100FEA 1 ea. RS2 RES-CURR.SENSE, SMD, 1206, 0.01Ω, 1W,

1%, 75ppm, ROHS

VISHAY/DALE

WSLP1206R0200FEA 1 ea. RS1 RES-CURR.SENSE, SMD, 1206, 0.02Ω, 1W,

1%, 75ppm, ROHS

VISHAY/DALE

GT11MSCBE 2 ea. SW1, SW2 SWITCH-TOGGLE, SMD, 6PIN, SPDT, 2POS,

ON-NONE-ON, ROHS

ITT INDUSTRIES/C&K DIVISION

PMSSS 440 0025 PH 4 ea. Four corners SCREW, 4-40x1/4in, PHILLIPS, PANHEAD,

STAINLESS, ROHS

BUILDING FASTENERS

2204 4 ea. Four corners STANDOFF, 4-40x3/4in, F/F, HEX,

ALUMINUM, 0.25 OD, ROHS

KEYSTONE

0 ea. C1 DO NOT POPULATE OR PURCHASE

0 ea. JP1, JP2 DO NOT POPULATE OR PURCHASE

0 ea. L2 DO NOT POPULATE OR PURCHASE

0 ea. R3, R35, R37 DO NOT POPULATE OR PURCHASE

0 ea. TP38-TP42 DO NOT POPULATE OR PURCHASE

Bill of Materials (Continued)

MANUFACTURER PART QTY UNITS REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER

UG075 Rev 3.00 Page 10 of 17

November 4, 2016

ISL9237EVAL2Z

0 ea. C19, C20, C25, C27, C28, C29,

C34, C35, C39, C44, C88-C97

DO NOT POPULATE OR PURCHASE

LABEL-DATE CODE 1 ea. AFFIX TO BACK OF PCB LABEL-DATE CODE_LINE 1: YRWK/REV#,

LINE 2: BOM NAME

INTERSIL

LABEL-RENAME BOARD RENAME PCB TO:

ISL9237EVAL2Z.

LABEL, TO RENAME BOARD INTERSIL

Bill of Materials (Continued)

MANUFACTURER PART QTY UNITS REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER

PCB Layout Guidelines

PIN NUMBER PIN NAME LAYOUT GUIDELINES

BOTTOM PAD

GND Connect this ground pad to the ground plane through low impedance path. Recommend use of at least five vias to

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

1 CSON Run two dedicated traces with decent 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 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. Provides feedback for the system bus voltage. Place the optional RC filter in general proximity of the

controller. Run a dedicated trace from 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 general proximity of the controller. Use decent wide trace. Avoid any

sensitive analog signal trace from crossing over or getting close.

5 UGATE2 Run these two traces in parallel fashion with decent width. Avoid any sensitive analog signal trace from crossing over

or getting close. Recommend routing PHASE2 trace to high-side MOSFET source pin instead of general copper.

The IC should be placed 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; and use shortest PCB trace connection. Place these capacitors on the same PCB layer with 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 big 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 LGATE2 trace in parallel with UGATE2 and PHASE2 traces on the same PCB layer. Use decent

width. Avoid any sensitive analog signal trace from crossing over or getting close.

8 VDDP Place the decoupling capacitor in general proximity of the controller. Run the trace connecting to VDD pin with decent

width.

9 LGATE1 Switching pin. Run LGATE1 trace in parallel with UGATE1 and PHASE1 traces on the same PCB layer. Use decent

width. Avoid any sensitive analog signal trace from crossing over or getting close.

CURRENT-SENSING TRACES

VIAS

CURRENT-SENSING TRACES

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