Intersil ISL62381 Manuale utente

®ISL62381, ISL62382 Quad-Output Evaluation

Board User Guide

Introduction

The ISL62381 and ISL62382 evaluation boards demonstrate

the performance of ISL62381 and ISL62382 Quad-output

controllers. The ISL62381 and ISL62382 controller include

two pulse-width modulation (PWM) controllers featured with

Intersil’s patented R3 technology, adjustable from 0.6V to

5.5V, and two linear regulators, LDO5 and LDO3, that

generate a fixed 5V and an adjustable output respectively.

The evaluation board includes two independent Enable

switches, two LED Power-Good indicators and various test

points. Included with each switching channel is an on-board

dynamic load generator for evaluating the transient-load

response. There are four different evaluation boards which

provide flexible evaluation options. Table 1 shows a brief

description of the evaluation boards.

What’s Inside

The Evaluation Board Kit contains the following materials:

• ISL6238xxxEVAL1Z Evaluation Board

• ISL62381 and ISL62382 Datasheet

• ISL62381 And ISL62382 Evaluation Board User Guide

(this document)

What’s Needed

The following materials will be needed to perform testing:

• Adjustable +25V, 30A Power Supply

• +12V, 100mA Power Supply

• Precision digital multi-meter

• 4 Electronic Loads

• 4-Channel Oscilloscope

Enable Control

The evaluation board provides flexible control logic to enable

or disable the outputs, and to program the two PWM

channels’ start-up sequence. For start-up timing sequence,

please refer to the datasheet waveforms. Table 2 is the

Enable controller truth table.

Resistor Current Sense Configuration

The evaluation board is pre-configured with inductor DCR

current sense. For more precise overcurrent protection, it

also provides the option of resistor current sense. Figure 1

shows the configuration for resistor current sense.

For Channel-1, the ISL62381 and ISL62382 monitors the

OCSET1 pin and the ISEN1 pin voltages. Once the OCSET1

pin voltage is higher than the ISEN1 pin voltage for more than

10µs, the ISL62381 and ISL62382 declare an overcurrent

fault. For a chosen overcurrent, set point IOC and current

sense resistor RSENSE, the value of ROCSET is determined

by Equation 1

Where:

-R

OCSET (Ω) is the resistor used to program the

overcurrent setpoint

-I

OC is the output current threshold that will activate the

OCP circuit

-R

SENSE is current sense resistor (R3for Channel-1 and

R25 for Channel-2)

TABLE 1. EVALUATION BOARD DESCRIPTION

EVALUATION BOARD CHANNEL-1 CHANNEL-2 OCP

ISL62381LOEVAL1Z 3.3V/8A 5V/8A ~10A

ISL62381HIEVAL1Z 1.05V/15A 1.5V/15A ~20A

ISL62382LOEVAL1Z 3.3V/8A 5V/8A ~10A

ISL62382HIEVAL1Z 1.05V/15A 1.5V/15A ~20A

TABLE 2. ENABLE TRUTH TABLE

EN1 EN2 START-UP SEQUENCE

Low Low Both Channel outputs OFF simultaneously

Low Float Both Channel outputs OFF simultaneously

Float Low Both Channel outputs OFF simultaneously

Float Float Both Channel outputs OFF simultaneously

Low High Channel-1 OFF, Channel-2 ON

High Low Channel-1 ON, Channel-2 OFF

High High Both Channel outputs ON simultaneously

Float High Channel-1 enabled after Channel-2 is in regulation

High Float Channel-2 enabled after Channel-1 is in regulation

FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT

PHASEx

LVO

OCSETx

ISENx

ISL62381

10µA

VRSENSE

VROCSET

RSENSE

ROCSET

ISL62382

(EQ. 1)

ROCSET IOC RSENSE

•

10μA

-------------------------------------

July 31, 2008 AN1396.0Application Note

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 |Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

2AN1396.0

July 31, 2008

Take Channel-1 as an example, once the value of ROCSET

is calculated, follow the following procedure to configure the

resistor current sense circuit:

Step 1: Open the “DCR SENSE” solder bridge and

connect the “RESISTOR SENSE” solder bridge

on the PCB bottom layer;

Step 2: Remove R7 (R22 for Channel 2);

Step 3: Replace R3(R25 for Channel 2) with RSENSE;

Step 4: Replace C6(C25 for Channel 2) with ROCSET;

Step 5: Replace replace R19 (R18 for Channel 2) with

ROCSET.

Dynamic Load Generator

The evaluation board provides each PWM channel an

on-board dynamic load generator for evaluating the

transient-load response, which are controlled by SW1 and

SW2 respectively. The dynamic load generator applies a

300µs pulse load across VOUT and GND. The transient load

slew-rate can be trimmed by adjusting the resistors R34, R40

for the rising edge, and R38, R39 for the falling edge. +12V

power supply is needed to power the dynamic load

generator.

Connections and Test Points The following table describes the function and operation of the evaluation boards.

NUMBER NAME FUNCTION/OPERATION

INTERFACES AND CONNECTIONS

TP3 VBAT VIN positive power input

TP4 GND VIN return power input

TP1 VOUT1 Channel-1 positive power output

TP2 GND Channel-1 return power output

TP11 VOUT2 Channel-2 positive power output

TP12 GND Channel-2 return power output

TP20 +12V +12V positive power input, used for the power supply of the on-board dynamic-load generator

TP19 GND +12V return power input

TEST POINTS

J1 PHASE2 Scope-probe socket for measuring Channel-2 phase node

J3 PHASE1 Scope-probe socket for measuring Channel-1 phase node

J2 VOUT1 Scope-probe socket for measuring Channel-1 output

J5 VOUT2 Scope-probe socket for measuring Channel-2 output

J4 FLOAT_FCCM Remove the jumper will float the FCCM pin

J6 FLOAT_EN1 Remove the jumper will float the EN1 pin

J7 FLOAT_EN2 Remove the jumper will float the EN2 pin

TP17 EN1 Test point of EN1 pin

TP8 EN2 Test point of EN2 pin

TP9 LDO3EN Test point of LDO3EN pin

TP10 FCCM Test point of FCCM pin

POWER-GOOD INDICATORS

TP13 PGOOD1 Test point of PGOOD1 pin

TP5 PGOOD2 Test point of PGOOD2 pin

D1 Channel-1 Power-Good indicator. Green when VOUT1 is in regulation.

D2 Channel-2 Power-Good indicator. Green when VOUT2 is in regulation.

LINEAR REGULATORS

TP14 LDO5 LDO5 linear regulator positive power output

TP15 GND LDO5 linear regulator return power output

TP16 LDO3IN Input of LDO3 linear regulator. Connect to connected to a voltage greater than the LDO3 set point plus the dropout

voltage.

TP18 LDO3FB LDO3 linear regulator output voltage feedback test point

TP6 LDO3 LDO3 linear regulator positive power output

TP7 GND LDO3 linear regulator return power output

Application Note 1396

3AN1396.0

July 31, 2008

Test Set-up

Figure 2 shows a typical test configuration.

SWITCHES

SW1 ON/OFF control of Channel-2 dynamic-load generator. Toggle to ON will enable the dynamic load, toggle to OFF

will disable the transient load

SW2 ON/OFF control of Channel-1 dynamic-load generator. Toggle to ON will enable the dynamic load, toggle OFF will

disable the transient load

U2 ON: High level for EN1, EN2, LDO3EN and FCCM, respectively

OFF: Low level for EN1, EN2, LDO3EN and FCCM, respectively

Connections and Test Points The following table describes the function and operation of the evaluation boards. (Continued)

VIN

(5.5V~25V)

LDO3

(0.6V~5.5V)

12V

VOUT1

(0.6V~5.5V)

VOUT2

(0.6V~5.5V)

PROBE

FIGURE 2. TYPICAL TEST CONFIGURATION

Application Note 1396

4AN1396.0

July 31, 2008

ISL62381LOEVAL1Z, ISL62382LOEVAL1Z Evaluation Board Bill of Materials

ISL62381LOEVAL1Z and ISL62382LOEVAL1Z evaluation boards use the same PCB and schematic, thus the same bill of materials except for the

controller U1.

NO. REFERENCE

DESIGNATOR QTY VALUE VOLTAGE/

POWER TOL.

(%) MANUFACTURER DESCRIPTION

1 C6, C25 2 0.022µF 25V 10 GENERIC SM_CAP_0603, 0.022µF, 25V, 10%, X7R, ROHS

2 C8, C9 2 0.01µF 16V 10 GENERIC SM_CAP_0603, 0.01µF, 16V, 10%, X7R, ROHS

3 C17, C19 2 0.22µF 16V 10 GENERIC SM_CAP_0603, 0.22µF, 16V, 10%, X7R, ROHS

4 C13, C15, C22, C23 4 10µF 25V 10 GENERIC SM_CAP_1206, 10µF, 25V, 10%, X7R, ROHS

5 C12, C14 2 1200pF 16V 10 GENERIC SM_CAP_0603, 1200PF, 16V, 10%, X7R, ROHS

6 C7, C10 2 1µF 10V 10 GENERIC SM_CAP_0603, 1µF, 10V, 10%, X7R, ROHS

7 C30 1 1µF 25V 10 GENERIC SM_CAP_0805, 1µF, 25V, 10%, X7R, ROHS

8 C11, C24 2 1µF 25V 10 GENERIC SM_CAP_1206, 1µF, 25V, 10%, X7R, ROHS

9 C1, C2, C28, C29 4 4.7µF 10V 10 GENERIC SM_CAP_0805, 4.7µF, 10V, 10%, X7R, ROHS

10 C20, C21 2 4.7µF 10V 10 GENERIC SM_CAP_1206, 4.7µF, 10V, 10%, X7R, ROHS

11 C16, C18, C31, C32 4 10µF 16V 10 GENERIC SM_CAP_0805, 10µF, 16V, 10%, X5R, ROHS

12 C3 1 56µF 25V 20 SANYO-OSCON RADIAL_POLCAP_RADIAL, 25SP56M, 56µF,

25V, 20%, CASE-CC

13 C4, C26 2 330µF 6.3V 10 SANYO-POSCAP SM_POLCAP_SMD, 6TPF330M9L, 330UF,

6.3V, 10%, CAP_7343

14 R12, R15 2 750 1/10W 1 GENERIC SM_RES_0603, 750, 1/10W, 1%, TF, ROHS

15 R11, R30 2 10k 1/10W 1 GENERIC SM_RES_0603, 10k, 1/10W, 1%, TF, ROHS

16 R14 1 9.09k 1/10W 1 GENERIC SM_RES_0603, 9.09k, 1/10W, 1%, TF, ROHS

17 R13 1 68.1k 1/10W 1 GENERIC SM_RES_0603, 68.1k, 1/10W, 1%, TF, ROHS

18 R7, R18, R19, R22 4 15.8k 1/10W 1 GENERIC SM_RES_0603, 15.8k, 1/10W, 1%, TF, ROHS

19 R29 1 17.4k 1/10W 1 GENERIC SM_RES_0603, 17.4k, 1/10W, 1%, TF, ROHS

20 R8 1 19.6k 1/10W 1 GENERIC SM_RES_0603, 19.6k, 1/10W, 1%, TF, ROHS

21 R9 1 24.3k 1/10W 1 GENERIC SM_RES_0603, 24.3k, 1/10W, 1%, TF, ROHS

22 R16 1 45.3k 1/10W 1 GENERIC SM_RES_0603, 45.3k, 1/10W, 1%, TF, ROHS

23 R20, R33, R39 3 1k 1/10W 1 GENERIC SM_RES_0603, 1k, 1/10W, 1%, TF, ROHS

24 R38 1 1.58k 1/10W 1 GENERIC SM_RES_0603, 1.58k, 1/10W, 1%, TF, ROHS

25 R17, R32 2 48.7k 1/10W 1 GENERIC SM_RES_0603, 48.7k, 1/10W, 1%, TF, ROHS

26 R1, R2, R10 3 0 1/10W 1 GENERIC SM_RES_0603, 0, 1/10W, 1%, TF, ROHS

27 R34, R40 2 200 1/10W 1 GENERIC SM_RES_0603, 200, 1/10W, 1%, TF, ROHS

28 R5, R27 2 499 1/10W 1 GENERIC SM_RES_0603, 499, 1/10W, 1%, TF, ROHS

29 R6, R21, R23, R24,

R28, R31 6 100k 1/10W 1 GENERIC SM_RES_0603, 100k, 1/10W, 1%, TF, ROHS

30 R35 1 0.7 1W 1 GENERIC SM_RES_2512, 0.7, 1W, 1%, TF, ROHS

31 R37 1 0.5 1W 1 GENERIC SM_RES_2512, 0.5, 1W, 1%, TF, ROHS

32 D1, D2 2 SSL_LXA3025IGC LUMEX SSL_LXA3025IGC_SMD-SSL-LXA3025IGC,

LED_3x2_5MM

33 D3, D4 2 BAT54S DIODES SM_SCHOTTKY_BAT54S-BAT54S, SOT23

34 Q2, Q4 2 IRF7821PBF IR 30V 13.6A N-Channel HEXFET Power MOSFET

(Pb-free)

Application Note 1396

5AN1396.0

July 31, 2008

35 Q3, Q5 2 IRF7832PBF IR 30V 20A N-Channel HEXFET Power MOSFET

(Pb-FREE)

36 Q1, Q6, Q10, Q12 4 2N7002-7-F FAIRCHILD 2N7002_SOT23-2N7002-7-F,SOT23

37 Q11, Q13 2 SUD50N03-07 VISHAY SUD50N03_07_TO252-SUD50N03-07,

TO-252AA

38 SW1, SW2 2 GT11MSCBE-T C&K GT11MSCKE_SMT-GT11MSCBE-T,

GT13MSCKE

39 TP5, TP6, TP7, TP8,

TP9, TP10, TP13,

TP14, TP15, TP16,

TP17, TP18, TP19,

14 5002 KEYSTONE TEST_POINT_THOLE-5002,MTP500X

40 TP1, TP2, TP3, TP4,

TP11, TP12 6 1514-2 KEYSTONE TEST_POINT_THOLE-1514-2,TP-150C100P

41 J1, J2, J3, J5 4 131-5031-00 TEKTRONIX SCOPE_PROBE_5P_CONN-131-5031-00,

TEK131-5031-00

42 J4, J6, J7 3 68000-236 FCI CONN2_DIP2-68000-236, CONN2

43 U2 1 78B04S GRAYHILL DIP_SW4_SPST_DIP-78B04S, DIP8-SW4

44 U1 1 ISL62381HRTZ

(ISL62382HRTZ) INTERSIL ISL62381HRTZ, 32 LD 5x5 TQFN

(ISL62382HRTZ, 32 LD 5x5 TQFN)

45 U3, U4 2 HIP2100IBZ INTERSIL HIP2100_SOIC-HIP2100IBZ,SOIC8_150_50

46 L1, L2 2 4.7µH 20% VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP-

5050CE-01-4R7M, 4.7µH, 24A, 20%,

VISHAY_IHLP-5050CE

47 R3, R25 2 Wire GENERIC Wire short

48 DCR SENSE 4 Wire GENERIC Wire short

49 Jumper Connector 3 SPC02SYAN SULLINS Connector Jumper for J4, J6, J7

50 1 PCB TBD ISL62381EVAL1ZREVA PCB

51 1 Label TBD LABEL, FOR SERIAL NUMBER AND BOM

REV #

52 C5, C27, C33, C34,

C35, C36 6 No-pop

53 R4, R26, R36, R41 4 No-pop

54 Q7, Q8, Q9, Q14 4 No-pop

ISL62381LOEVAL1Z, ISL62382LOEVAL1Z Evaluation Board Bill of Materials

ISL62381LOEVAL1Z and ISL62382LOEVAL1Z evaluation boards use the same PCB and schematic, thus the same bill of materials except for the

controller U1. (Continued)

NO. REFERENCE

DESIGNATOR QTY VALUE VOLTAGE/

POWER TOL.

(%) MANUFACTURER DESCRIPTION

Application Note 1396

6AN1396.0

July 31, 2008

ISL62381HIEVAL1Z, ISL62382HIEVAL1Z Evaluation Board Bill of Materials

The ISL62381HIEVAL1Z, ISL62382HIEVAL1Z evaluation boards use the same PCB and schematic as the ISL62381LOEVAL1Z,

ISL62382LOEVAL1Z evaluation boards but different bill of materials (BOM). The following table shows the BOM difference of ISL62381HIEVAL1Z,

ISL62382HIEVAL1Z in comparison with ISL62381LOEVAL1Z, ISL62382LOEVAL1Z.

NO. REFERENCE

DESIGNATOR QTY VALUE VOLTAGE

/POWER TOL.

(%) MANUFACTURER DESCRIPTION

1 Q8, Q14 2 IRF7821PBF IR 30V 13.6A N-Channel HEXFET Power MOSFET

(Pb-free)

2 Q7, Q9 2 IRF7832PBF IR 30V 20A N-Channel HEXFET Power MOSFET

(Pb-free)

3 R8 1 14k 1/10W 1 GENERIC SM_RES_0603, 14k, 1/10W, 1%, TF, ROHS

4 R9 1 17.4k 1/10W 1 GENERIC SM_RES_0603, 17.4k, 1/10W, 1%, TF, ROHS

5 R11 1 23.2k 1/10W 1 GENERIC SM_RES_0603, 23.2k, 1/10W, 1%, TF, ROHS

6 R16 1 17.8k 1/10W 1 GENERIC SM_RES_0603, 17.8k, 1/10W, 1%, TF, ROHS

7 R13 1 15k 1/10W 1 GENERIC SM_RES_0603, 15k, 1/10W, 1%, TF, ROHS

8 R14 1 10k 1/10W 1 GENERIC SM_RES_0603, 10k, 1/10W, 1%, TF, ROHS

9 R7, R18, R19, R22 4 16.2k 1/10W 1 GENERIC SM_RES_0603, 16.2k, 1/10W, 1%, TF, ROHS

10 R35 1 0.2 1W 1 GENERIC SM_RES_2512, 0.2, 1W, 1%, TF, ROHS

11 R37 1 0.1 1W 1 GENERIC SM_RES_2512, 0.1, 1W, 1%, TF, ROHS

12 R38 1 4.02k 1/10W 1 GENERIC SM_RES_0603, 4.02k, 1/10W, 1%, TF, ROHS

13 R12, R15 2 590 1/10W 1 GENERIC SM_RES_0603, 590, 1/10W, 1%, TF, ROHS

14 C12, C14 2 1800pF 16V 10 GENERIC SM_CAP_0603, 1800PF, 16V, 10%, X7R, ROHS

15 C33, C36 2 330µF 6.3V 10 SANYO-POSCAP SM_POLCAP_SMD, 6TPF330M9L, 330µF, 6.3V,

10%, CAP_7343

16 L1, L2 2 2.2µH 20 VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP-5050CE-

01-2R2M,2.2µH, 29A, 20%, VISHAY_IHLP-

5050CE

Application Note 1396

7AN1396.0

July 31, 2008

ISL6238xxxEVAL1Z Evaluation Board Schematic

ISL62381LOEVAL1Z

04/10/08

REV A

Q14

0.68

R35

OPEN

C35

4.7UH

1200PF

R13

C14

1200PF

VOUT1

SUD50N03_07

Q11

Q13

SUD50N03_07

2N7002

IRF7821

IRF7832

IRF7821

10UF

1UF

R34

200

SW1

BAT54S

SSL_LXA3025IGC

2N7002

ISL62381HRTZ

OPEN

C36

OPEN

R23

TP16

R38

TP5

R10

C19

R7C6

R37

R36

R19

R16

R41

R39

R40

R25

R14

C25R22

R18

R26

C16

R27

R11

R12

C17

TP20

R17

R20

C18

R32 R33

Q10

C31

C32

SW2

TP19

Q12

TP13

R28

C24

TP14

TP15

C21

TP7

C11

C13

C15

Q7 Q3

TP17

TP8

TP9

TP10

R31

R21

R24

C34

C22

C23

C30

TP6

TP18

R15

R29

C10

TP3

C12

TP2

TP1

C33

TP11

TP12

C29

C28

C26

C27

1.58K

10K

VCC1

0.22UF

0.01UF

0.22UF

10UF

2N7002

LDO3EN

EN1

EN2

OPEN

100K

78B04S

1UF

4.7UF

10UF

0.022UF

PHASE2

1UF

45.3K

15.8K

68.1K

LDO5

OPEN

EN2

750

PHASE2

10UF

VCC1

PHASE1

100K

VOUT1

VOUT2

200

EN1

10UF

9.09K

100K

2N7002

4.7UH

LDO3EN

10UF

HIP2100

10UF

1UF

LDO5

HIP2100

10UF

OPEN

0.47

499

OPEN

19.6K

BAT54S

499

1UF

48.7K

750

15.8K

OPEN

100K

LDO3

10K

LDO5

FCCM

100K

VOUT2

SSL_LXA3025IGC

OPEN

LDO3FB

17.4K

48.7K

0.01UF

24.3K

OPEN

4.7UF

VOUT1

4.7UF

330UF

4.7UF

330UF

VOUT2

OPEN

56UF

TP4

0.022UF

IRF7832

PHASE1

4.7UF

C20

R30

FCCM

FB1

OCSET2

FB2

VOUT2

ISEN2

EN2

PHASE2

UGATE2

BOOT2

LGATE2

PGND

LDO5

VIN

LDO3IN

LDO3

LDO3FB

LGATE1

BOOT1

UGATE1

PHASE1

EN1

OCSET1

ISEN1

VOUT1

PGOOD1

FSET1

FSET2

PGOOD2

FCCM

VCC2

LDO3EN

VCC1

RED

GRN

VSS

VDD

+12V

VSS

VDD

VBAT

RED

GRN

TITLE:

ENGINEER:

DRAWN BY:

SHEET:

DATE:

REV:

765432

Application Note 1396

8AN1396.0

July 31, 2008

ISL6238xxxEVAL1Z Evaluation Board Layout

FIGURE 3. TOP SILKSCREEN

Application Note 1396

9AN1396.0

July 31, 2008

ISL6238xxxEVAL1Z Evaluation Board Layout (Continued)

FIGURE 4. BOTTOM SILKSCREEN

Application Note 1396

10 AN1396.0

July 31, 2008

ISL6238xxxEVAL1Z Evaluation Board Layout (Continued)

FIGURE 5. LAYER 1

Application Note 1396

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