max15068 evaluation kit - evaluates: max15068 · maxim integrated │3 max15068 evaluation kit...

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Evaluates: MAX15068 MAX15068 Evaluation Kit 19-6895; Rev 1; 10/19 Ordering Information appears at end of data sheet. General Description The MAX15068 evaluation kit (EV kit) provides a proven design to evaluate the MAX15068 dual ORing, single hot- swap controller. The EV kit operates from a 4.8V to 18V range and provides a solution for evaluating two input supply rail applications requiring the safe insertion and removal of circuit line cards from a live backplane. Each rail has an individual ideal diode and is connected to the load through a single hot-swap MOSFET. The EV kit uses the MAX15068ATP+ in a 4mm x 5mm, 20-pin TQFN package on a proven four-layer PCB design. Features and Benefits 4.8V to 18V Operating Voltage Range Banana Jacks for Input and Output Voltage Current Monitoring Programmable Slew-Rate Control Selectable Circuit-Breaker Threshold Configurable Undervoltage Lockout Adjustable Current-Limit Fault Delay FAULT and PG Outputs Enable Input Proven PCB Layout Fully Assembled and Tested Quick Start Required Equipment MAX15068 EV kit Two 4.8V to 18V DC power supplies (PS1, PS2) Voltmeter Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Verify that a shunt is installed across jumper JP1. 2) Verify that a shunt is installed across pins 1-2 on jumper JP2. 3) Turn on power-supply PS1 and set the supply to 12V, then disable the power supply. 4) Turn on power-supply PS2 and set the supply to 12V, then disable the power supply. 5) Connect the positive terminal of power-supply PS1 to the IN1 banana jack on the EV kit. Connect the negative terminal of the power supply to the GND banana jack. 6) Connect the positive terminal of power-supply PS2 to the IN2 banana jack on the EV kit. Connect the negative terminal of the power supply to the GND banana jack. 7) Enable the power supplies. 8) Verify that the voltage between the OUT and GND banana jacks is 12V. 9) The EV kit is now ready for additional evaluation.

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Evaluates: MAX15068MAX15068 Evaluation Kit

19-6895; Rev 1; 10/19

Ordering Information appears at end of data sheet.

General DescriptionThe MAX15068 evaluation kit (EV kit) provides a proven design to evaluate the MAX15068 dual ORing, single hot-swap controller. The EV kit operates from a 4.8V to 18V range and provides a solution for evaluating two input supply rail applications requiring the safe insertion and removal of circuit line cards from a live backplane. Each rail has an individual ideal diode and is connected to the load through a single hot-swap MOSFET. The EV kit uses the MAX15068ATP+ in a 4mm x 5mm, 20-pin TQFN package on a proven four-layer PCB design.

Features and Benefits 4.8V to 18V Operating Voltage Range Banana Jacks for Input and Output Voltage Current Monitoring Programmable Slew-Rate Control Selectable Circuit-Breaker Threshold Configurable Undervoltage Lockout Adjustable Current-Limit Fault Delay FAULT and PG Outputs Enable Input Proven PCB Layout Fully Assembled and Tested

Quick StartRequired Equipment

MAX15068 EV kit Two 4.8V to 18V DC power supplies (PS1, PS2) Voltmeter

ProcedureThe EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed.1) Verify that a shunt is installed across jumper JP1.2) Verify that a shunt is installed across pins 1-2 on

jumper JP2.3) Turn on power-supply PS1 and set the supply to 12V,

then disable the power supply.4) Turn on power-supply PS2 and set the supply to 12V,

then disable the power supply.5) Connect the positive terminal of power-supply PS1 to

the IN1 banana jack on the EV kit. Connect the negative terminal of the power supply to the GND banana jack.

6) Connect the positive terminal of power-supply PS2 to the IN2 banana jack on the EV kit. Connect the negative terminal of the power supply to the GND banana jack.

7) Enable the power supplies.8) Verify that the voltage between the OUT and GND

banana jacks is 12V.9) The EV kit is now ready for additional evaluation.

Maxim Integrated 2www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Detailed Description of HardwareThe MAX15068 EV kit provides a proven design to evaluate the MAX15068 dual ORing, single hot-swap controller. The EV kit can be easily connected between two system power inputs and the load using the banana jacks provided for the input and output. PCB pads are provided to monitor and control the device signals. The EV kit operates between 4.8V and 18V.

Enable Input (EN)The device’s enable input is controlled by jumper JP1. If a shunt is installed across JP1, a 10µA current source pulls the EN pin up to a diode drop below VS and the MOSFETs are not allowed to turn on. With this setting, a test point (EN) is also provided to drive the EN pin. If no shunt is installed across jumper JP1, the EN pin is forced to GND and hot-swap control is enabled. See Table 1 for JP1 settings.

Priority Control Input (PC)The device features a priority control input pin to give priority to IN1 when the IN1 and IN2 supplies are equal. To enable priority control for IN1, set JP2 to pins 2-3 to connect the IN1 supply to a resistive divider to the PC pin of the device. To disable IN1 priority control and allow the IN2 ideal diode controller to operate normally, connect JP2 to pins 1-2 to connect the PC pin to GND. See Table 2 for JP2 settings.

ON Control InputJumper JP3 controls the ON input of the device. By installing a shunt on JP3, the CSP node connects to the ON pin through resistive divider R3/R4. A rising edge above 1.235V on the ON pin turns on the external hot-swap MOSFET and a falling edge below 1.155V turns it off. If no shunt is installed across JP3, the ON pin is pulled to GND through resistor R3 and the EV kit is disabled. See Table 3 and the Undervoltage Lockout section for JP3 settings.

Circuit Breaker (CB)The device features a programmable current limit with a circuit-breaker function that protects the external MOSFETs against short circuits or excessive load current. The voltage across external sense resistor R51 is monitored by an electronic circuit breaker and active current-limit amplifier. Jumper JP4 sets the current-limit threshold for the internal circuit breaker (CB) of the device. See Table 4 for JP4 settings.

Timer Capacitor (CDLY)Capacitor C4 is used to set the time-out delay for current limit before the external hot-swap MOSFET is turned off at a rate of 12ms/µF, with the duration of the off time set at 617msec/µF. As configured, the EV kit has a current-limit delay of 1.2ms and a turn-off time of 61.7ms.

*Default position.

*Default position.

*Default position.

*Default position.

Table 1. JP1 Jumper Selection (EN)Table 3. JP3 Jumper Selection (ON)

Table 4. JP4 Jumper Selection (CB)Table 2. JP2 Jumper Selection (PC)

SHUNT POSITION EN PIN HOT-SWAP

CONTROLInstalled* Connected to GND Enabled

Not installed Internal 10µA pullup Disabled unless driven low externally

SHUNT POSITION ON PIN IN1 PRIORITY

CONTROL1-2 Connected to GND Disabled

2-3* Connected to IN1 through resistor-divider R7/R8 Enabled

SHUNT POSITION

CB PIN CONNECTED TO

CIRCUIT BREAKER THRESHOLD (mV)

1-2* VS 65Not connected Open 50

2-3 GND 35

SHUNT POSITION ON PIN UVLO

Installed*Connected to CSP through resistive divider R3/R4

Configured through R3/R4 resistive divider

Not installed

Connected to GND through R3 EV kit disabled

Maxim Integrated 3www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Setting the Output Slew RateAn external capacitor (C5) is connected from GATE to GND of the IC to reduce the output slew-rate during startup. During start-up, a 10µA (typ) current is sourced to enhance the MOSFET. C5 can be calculated according to the formula below:

C5 = (IGATE x ∆t)/∆VGATEwhere IGATE is 10µA (typ), ∆t is the desired rise time, and ∆VGATE is the voltage at the source of the hot-swap MOSFET after turn-on is complete.

Undervoltage LockoutThe EV kit provides an option to configure the undervoltage-lockout threshold when a shunt is installed across jumper

JP3. The undervoltage-lockout threshold for the device is configured by the CSP voltage level, divided by R4 and R3 at the ON pin. By default, the undervoltage-lockout threshold is set to 4.8V.

Analog Current Monitor Output (IPMON)The device’s IPMON pin has a 0 to 1.7V output voltage range and monitors the system input current that is sensed by the current flowing through sense resistor R51.The voltage at IPMON is proportional to the input current by the following equation:

VIPMON = GIM x (VCSP - VCSN)where GIM = 71.565.

Maxim Integrated 4www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

MAX15068 EV Kit Bill of Materials

ITEM

QTY

REF

DES

Var

Stat

usEN

UM

BER

MFG

PA

RT

#M

FGVA

LUE

DES

CR

IPTI

ON

STA

TUS

CO

MM

ENTS

19

C1-

C4,

C6,

C7,

C10

,C11

,C1

3Pr

ef20

-000

U1-

91N

/A?

0.1U

F

CAP

ACIT

OR

; SM

T (0

603)

; CER

AMIC

CH

IP; 0

.1U

F; 5

0V; T

OL=

10%

; M

OD

EL=;

TG

=-55

DEG

C T

O +

125

DEG

C; T

C=X

7R; N

OT

REC

OM

MEN

DED

FO

R N

EW D

ESIG

N U

SE 2

0-00

0u1-

01EV

KIT-

NO

T FO

R T

EST

21

C5

Pref

20-0

U01

5-14

N/A

?0.

015U

FC

APAC

ITO

R; S

MT;

060

3; C

ERAM

IC;

0.01

5uF;

50V

; 10%

; X7R

; -55

degC

to +

125

degC

ACTI

VE

32

C8,

C9

Pref

20-0

100U

-01A

N/A

?10

0UF

CAP

ACIT

OR

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T (C

ASE_

F); A

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M-E

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TRO

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=-40

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T FO

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OPE

N

41

C12

Pref

20-0

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51

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71

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Maxim Integrated 5www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

MAX15068 EV Kit Bill of Materials (continued)

ITEM

QTY

REF

DES

Var

Stat

usEN

UM

BER

MFG

PA

RT

#M

FGVA

LUE

DES

CR

IPTI

ON

STA

TUS

CO

MM

ENTS

201

GD

RV

Pref

N/A

N/A

?N

/ATE

ST P

OIN

T; P

AD D

IA=0

.06I

NEV

KIT-

CU

STO

M

211

IN1

Pref

02-

2501

2008

0000

0070

-00

2501

-2-0

0-80

-00-

00-

07-0

?25

01-2

-00-

80-

00-0

0-07

-0

TER

MIN

AL; T

UR

RET

; PIN

DIA

=0.0

90IN

; TO

TAL

LEN

GTH

=0.3

28IN

; BO

ARD

HO

LE=0

.094

IN;T

IN O

VER

NIC

KEL

MAT

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INIS

H;

REC

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MEN

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FO

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NEV

KIT-

NO

T FO

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EST

IN1

221

IN2

Pref

02-

2501

2008

0000

0070

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2501

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0-80

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?25

01-2

-00-

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00-0

0-07

-0

TER

MIN

AL; T

UR

RET

; PIN

DIA

=0.0

90IN

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TAL

LEN

GTH

=0.3

28IN

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ARD

HO

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IN;T

IN O

VER

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REC

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FO

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KIT-

NO

T FO

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EST

IN2

232

JP1,

JP3

Pref

01-

PEC

02SA

AN2

P-21

PEC

02SA

ANSU

LLIN

SPE

C02

SAAN

CO

NN

ECTO

R; M

ALE;

TH

RO

UG

H H

OLE

; BR

EAKA

WAY

; STR

AIG

HT;

2P

INS;

-65

DEG

C T

O +

125

DEG

CAC

TIVE

242

JP2,

JP4

Pref

01-

PEC

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P-21

PEC

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SPE

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ALE;

TH

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MIN

AL; T

UR

RET

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DIA

=0.0

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; TO

TAL

LEN

GTH

=0.3

28IN

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ARD

HO

LE=0

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IN;T

IN O

VER

NIC

KEL

MAT

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INIS

H;

REC

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MEN

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FO

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D T

HIC

KNES

S=0.

062I

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KIT-

NO

T FO

R T

EST

OU

T

262

Q1,

Q2

Pref

90-

PSM

N2R

230Y

LC-2

1PS

MN

2R2-

30YL

CN

XPPS

MN

2R2-

30YL

CTR

AN; N

-CH

ANN

EL; 2

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MIL

LIO

HM

LO

GIC

LEV

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OSF

ET; N

CH

; LF

PAK;

PD

-(141

W);

I-(10

0A);

V-(3

0V)

EVKI

T-N

OT

FOR

TES

T

272

Q3,

Q4

Pref

90-

PSM

N1R

030Y

LC-2

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MN

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30YL

CN

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AN; N

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ANN

EL; 1

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MIL

LIO

HM

LO

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OSF

ET; N

CH

; LF

PAK;

PD

-(137

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I-(10

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V-(3

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L86

Maxim Integrated 6www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

MAX15068 EV Kit Bill of Materials (continued)

ITEM

QTY

REF

DES

ENU

MB

ERM

FG

PAR

T #

MFG

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KOU

T

DO

NO

T PU

RC

HAS

E

Maxim Integrated 7www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Figure 1. MAX15068 EV Kit Schematic

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Maxim Integrated 8www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Figure 2. MAX15068 EV Kit Component Placement Guide—Component Side

Maxim Integrated 9www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Figure 3. MAX15068 EV Kit PCB Layout—Component Side

Maxim Integrated 10www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Figure 4. MAX15068 EV Kit PCB Layout—GND Layer 2

Maxim Integrated 11www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Figure 5. MAX15068 EV Kit PCB Layout—Signal/GND Layer 3

Maxim Integrated 12www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

Figure 6. MAX15068 EV Kit PCB Layout—Solder Side

Maxim Integrated 13www.maximintegrated.com

Evaluates: MAX15068MAX15068 Evaluation Kit

#Denotes RoHS compliant.

PART TYPEMAX15068EVKIT# EV Kit

Ordering Information

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2019 Maxim Integrated Products, Inc. 14

Evaluates: MAX15068MAX15068 Evaluation Kit

REVISIONNUMBER

REVISIONDATE DESCRIPTION PAGES

CHANGED

0 1/14 Initial release —1 10/19 Corrected Procedure, equations, and description. All

Revision History

For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.