Intersil ISL6228EVAL3Z Manuale utente

AN1291.0

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.

ISL6228EVAL3Z User Guide

Introduction

The ISL6228EVAL3Z evaluation board demonstrates the

performance of the ISL6228 dual-channel PWM controller.

The ISL6228 features Intersil's Robust Ripple Regulator (R3)

technology. Channel-1 output voltage is 1.5V or 1.8V,

pending the state of switch S5. Channel-2 output voltage is

1.8V. Each channel has an on-board dynamic-load

generator included for evaluating the transient-load

response. It applies a 300µs pulse of 4.5A load across VO1

and GND, and it applies a 300µs pulse of 5A load across

VO2 and GND.

Contents of this document include:

• Recommended Test Equipment

• Interface Connections

• Switch Descriptions

• Test Point Descriptions

• Design Criteria

• Typical Performance

- Efficiency

- Start-up

- Shut-down

- Steady State, CCM

- Steady State, DCM

- Load-transient response

• Evaluation Board Documentation

- Bill of materials

- Schematic

- Silk-screen plots

- Board layer plots

Recommended Equipment

• (QTY 2) Adjustable 25V, 3A Power Supply

• (QTY 1) Fixed 5V, 100mA Power Supply

• (QTY 1) Fixed 12V, 100mA Power Supply

• (QTY 1) Adjustable 20A Constant Current Electronic Load

• (QTY 1) Digital Voltmeter

• (QTY 1) Four-Channel Oscilloscope

Interface Connections

•V

IN1: Input voltage to the power stage of Channel-1

- J14: VIN1 positive power input

-TP20:V

IN1 positive voltage sense

- J14: VIN1 return power input

-TP21:V

IN1 return voltage sense

•V

IN2: Input voltage to the power stage of Channel-2

-J1:V

IN2 positive power input

-TP9:V

IN2 positive voltage sense

-J2:V

IN2 return power input

-TP10:V

IN2 return voltage sense

•V

O1: Regulated output voltage from Channel-1

-J9:V

O1 positive power output

-TP13:V

O1 positive voltage sense

- J10: VO1 return power output

-TP14:V

O1 return voltage sense

•V

O2: Regulated output voltage from Channel-2

-J7:V

O2 positive power output

-TP11:V

O2 positive voltage sense

-J8:V

O2 return power output

-TP12:V

O2 return voltage sense

• VCC: +5V input voltage

- TP1: 5V positive input

- TP2: 5V return input

• +12V: Input voltage for the dynamic-load generator

- TP15: 12V positive input

- TP16: 12V return input

TABLE 1. DC/DC DESIGN CRITERIA

PARAMETER VALUE UNITS

VIN 3.3 to 25 VDC

VO0.6 to 5 VDC

Full-load 8 ADC

PWM Frequency 270, 300 kHz

Application Note May 17, 2007

Author: Jia Wei

2AN1291.0

May 17, 2007

Test Set-up

FIGURE 1. TEST SET-UP

Switch Descriptions

• S1: Channel-1 Enable

- OFF: Short the Channel-1 EN pin to GND (disable

PWM)

- ON: Allow the Channel-1 EN pin to pull-up to +5V

(enable PWM)

• S4: Channel-1 Dynamic Load

- OFF: On-board Channel-1 dynamic load disabled

- ON: On-board Channel-1 dynamic load enabled

• S5: Channel-1 VOIncrease

-OFF:V

O1 is 1.5V, determined by R15 and R23.

- ON: Parallel R49 with R15. VO1 is 1.8V.

• S2: Channel-2 Enable

- OFF: Short the Channel-2 EN pin to GND (disable

PWM)

- ON: Allow the Channel-2 EN pin to pull-up to +5V

(enable PWM)

• S3: Channel-2 Dynamic Load

- OFF: On-board Channel-2 dynamic load disabled

- ON: On-board Channel-2 dynamic load enabled

Test-point Descriptions

• J4: Scope-probe socket for measuring PHASE1

• J6: Scope-probe socket for measuring VO1

• J12: Scope-probe socket for measuring the current of the

Channel-1 on-board transient-load emulator

• J3: Scope-probe socket for measuring the PHASE2 node

• J5: Scope-probe socket for measuring VO2

• J11: Scope-probe socket for measuring the current of the

Channel-2 on-board transient-load emulator

• TP1: Monitor the 5V positive input

• TP2: Monitor the 5V return input

• TP3: Monitor the PGOOD2 pin

• TP4: Monitor the PGOOD1 pin

• TP5: The common node of R24 and R20; Useful for

Channel-1 loop gain measurement.

• TP6: The common node of R25 and R23; Useful for

Channel-2 loop gain measurement

• TP7: The VO1 side of R24; Useful for Channel-1 loop gain

measurement.

• TP8: The VO2 side of R25; Useful for Channel-1 loop gain

measurement.

• TP9: Monitor the VIN1 positive input

• TP10: Monitor the VIN1 return input

• TP11: Monitor the positive VO1 output

• TP12: Monitor the VO1 return output

• TP13: Monitor the positive VO2 output

• TP14: Monitor the VO2 return output

• TP15: Monitor the 12V positive input

• TP16: Monitor the 12V return input

• TP17: Monitor the EN1 pin

• TP18: Monitor the gate of transistor Q18

• TP19: Monitor the EN2 pin

• TP20: Monitor the VIN2 positive input

• TP21: Monitor the VIN2 return input

J10

ISL6228EVAL3Z

OFF

TP11

5V +

VO1

VO2

READING

J14

J13

TP1

TP2

VIN1

VIN2

+S3

S1 S4S5

OFF

VO1 INCREASE

J8 VO2

TP12

TP14

TP13

J3 J5

VO1

READING

J12

J11

TP15 TP16

12V+_

Application Note 1291

3AN1291.0

May 17, 2007

Typical Performance

FIGURE 2. CHANNEL-1 EFFICIENCY AT VO= 1.5V FIGURE 3. CHANNEL-2 EFFICIENCY AT VO=1.8V

FIGURE 4. CCM STEADY-STATE OPERATION, VIN = 12V,

VO1 = 1.5V, IO1 =3A,V

O2 = 1.8A, IO2 =4A FIGURE 5. DCM STEADY-STATE OPERATION, VIN =12V,

VO1 = 1.5V, IO1 = 0.5A, VO2 = 1.8V, IO2 =0.5A

FIGURE 6. TRANSIENT RESPONSE, VIN = 19V, VO=1.5V,

IO= 0.1A/4.6A @ 2.55A/µs FIGURE 7. TRANSIENT RESPONSE, VIN = 19V, VO=1.8V,

IO= 0.1A/5.1A @ 2.55A/µs

EFFICIENCY (%)

IOUT (A)

100

012345678

VIN = 12V

VIN = 19V

VIN = 8V

IOUT (A)

EFFICIENCY (%)

100

01 234 5678

VIN = 8V

VIN = 19V

VIN = 12V

VO1

PHASE1

VO2

PHASE2

VO1

PHASE1

VO2

PHASE2

VO1

PHASE1

IO1

VO2

PHASE2

IO2

Application Note 1291

4AN1291.0

May 17, 2007

FIGURE 8. LOAD INSERTION RESPONSE, VIN =19V,

VO= 1.5V, IO= 0.1A/4.6A @ 2.55Aµs FIGURE 9. LOAD INSERTION RESPONSE, VIN = 19V,

VO= 1.8V, IO= 0.1A/5.1A @ 2.55A/µs

FIGURE 10. LOAD RELEASE RESPONSE, VIN = 19V,

VO= 1.5V, IO= 0.1A/4.6A @ 2.55A/µs FIGURE 11. LOAD RELEASE RESPONSE, VIN =19V,

VO= 1.8V, IO= 0.1A/5.1A @ 2.55A/µs

Typical Performance(Continued)

VO1

PHASE1

IO1

VO2

PHASE2

IO2

VO1

PHASE1

IO1

VO2

PHASE2

IO2

Application Note 1291

5AN1291.0

May 17, 2007

Bill of Materials

QTY REFERENCE DESCRIPTION MANUFACTURER PART NUMBER

0 DNP (C8, C9) CAP, RADIAL, 56µF, 25V, ROHS SANYO 25SP56M

2 C1, C3 CAP, SMD, 0603, 1000pF, 16V, 10%, X7R, ROHS VENKEL H1045-00102-16V10-T

5 C20, C21, C37, C40, C41 CAP, SMD, 0603, 0.1µF, 16V, 10%, X7R, ROHS MURATA H1045-00104-16V10-T

6 C2, C7, C30, C31, C36, C39 CAP, SMD, 0603, 1µF, 16V, 20%, Y5V, ROHS MURATA H1045-00105-16V20-T

2 C18, C19 CAP, SMD, 0603, 10µF, 6.3V, 20%, X5R, ROHS TDK H1045-00106-6R3V20-T

2 C5, C6 CAP, SMD, 0603, 2200pF, 50V, 10%, X7R, ROHS MURATA H1045-00222-50V10-T

2 C14, C15 CAP, SMD, 0603, 0.22µF, 16V, 10%, X7R, ROHS TDK H1045-00224-16V10-T

2 C4, C38 CAP, SMD, 0603, 0.22µF, 25V, 20%, X7R, ROHS VENKEL H1045-00224-25V20-T

2 C34, C35 CAP, SMD, 0805, 4.7µF, 16V, 10%, X5R, ROHS PANASONIC H1046-00475-16V10-T

0 DNP (C32, C33) CAP, SMD, 0805, 4.7µF, 16V, 10%, X5R, ROHS PANASONIC H1046-00475-16V10-T

2 C16, C17 CAP, SMD, 1206, 1µF, 25V, 20%, X5R, ROHS PANASONIC H1065-00105-25V20-T

4 C10 to C13 CAP, SMD, 1206, 10µF, 25V, 20%, X5R, ROHS PANASONIC H1065-00106-25V20-T

2 C24, C27 CAP-LOW ESR, SMD, D3L, 330µF, 6.3V, 20%, POSCAP, ROHS SANYO 6TPF330M9L

0 DNP (C22, C23, C25, C26,

C28, C29) CAP-LOW ESR, SMD,D3L, 330µF, 6.3V, 20%, POSCAP, ROHS SANYO 6TPF330M9L

2 J1, J13 CONN-GEN, BIND.POST, INSUL-RED, THMBNUT-GND JOHNSON

COMPONENTS 111-0702-001

2 J2, J14 CONN-GEN, BIND.POST, INSUL-BLK, THMBNUT-GND JOHNSON

COMPONENTS 111-0703-001

0 J3 to J6, J11, J12 CONN-SCOPE PROBE TEST POINT, PCB MNT TEKTRONIX 131-4353-00

4 TP1, TP2, TP15, TP16 CONN-TURRET, TERMINAL POST, TH, ROHS KEYSTONE 1514-2

15 TP3 to TP14, TP17 to TP19 CONN-MINI TEST POINT, VERTICAL, WHITE, ROHS KEYSTONE 5002

0 DNP (D3, D4) DIODE-SCHOTTKY, SMD, SMB, 2P, 40V, 3A LOW VF, Pb-FREE DIODES INC. B340LB-13-F-T

2 D5, D6 DIODE-SCHOTTKY, SMD, SOT23, 3P, 30V, 200mA, DUAL DIODE FAIRCHILD BAT54S-T

2 D1, D2 LED, SMD, 4P, OTHER, POLARIZEDRED/GRN LUMEX SSL-LXA3025IGC

2 L1, L2 PWR CHOKE COIL, SMD, 13x12.9, 3.3µH, 20%, 18A, ROHS Vishay IHLP5050FDER3R3M01

2 U2, U3 IC-HI FREQ BRIDGE DRIVER, 8P, SOIC, 100V, ROHS INTERSIL HIP2100IBZ

1 U1 IC-DUAL CHANNEL CONTROLLER, 28P, QFN, ROHS INTERSIL ISL6228HRZ

5 Q11 to Q14, Q18 TRANSISTOR, N-CHANNEL, 3LD, SOT-23, 60V, 115mA, ROHS DIODES INC. 2N7002-7-F-T

0 DNP (Q5, Q10) TRANSISTOR-DUAL N-CHANNEL, 8P, SOIC, 30V, 7.5A, ROHS FAIRCHILD FDS6990AS

0 DNP (Q2, Q7) TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC, 30V, 9.1mΩRDS,

ROHS INTERNATIONAL

RECTIFIER IRF7821PBF

2 Q1, Q6 TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC, 30V, 9.1mΩRDS,

ROHS INTERNATIONAL

RECTIFIER IRF7821PBF

0 DNP (Q4, Q9) TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC,30V, 4.0mΩRDS,

ROHS INTERNATIONAL

RECTIFIER IRF7832PBF

2 Q3, Q8 TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC, 30V, 4.0mΩRDS,

ROHS INTERNATIONAL

RECTIFIER IRF7832PBF

2 Q15, Q16 TRANSISTOR-MOS, N-CHANNEL, SMD, TO-252, 30V, 20A,

ROHS VISHAY SUD50N03-07-E3

4 R9, R52, R53, R54 RES, SMD, 0603, 2Ω, 1/10W, 1%, TF, ROHS YAGEO H2511-00020-1/10W1-T

0 DNP (R12, R13, R57, R58) RESISTOR, SMD, 0603, 0Ω, 1/10W, TF, ROHS KOA H2511-00R00-1/10W-T

Application Note 1291

6AN1291.0

May 17, 2007

10 R10, R11, R24, R25, R48,

R50, R55, R56, R59, R60 RESISTOR, SMD, 0603, 0Ω, 1/10W, TF, ROHS KOA H2511-00R00-1/10W-T

5 R7, R8, R21, R22, R51 RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS KOA H2511-01002-1/10W1-T

2 R35, R37 RES, SMD, 0603, 1.07k, 1/10W, 1%, TF, ROHS PANASONIC H2511-01071-1/10W1-T

1 R49 RES, SMD, 0603, 162k, 1/10W, 1%, TF, ROHS YAGEO H2511-01623-1/10W1-T

2 R26, R27 RES, SMD, 0603, 2k, 1/10W, 1%, TF, ROHS KOA H2511-02001-1/10W1-T

1 R3 RES, SMD, 0603, 20k, 1/10W, 1%, TF, ROHS KOA H2511-02002-1/10W1-T

1 R4 RES, SMD, 0603, 22.1k, 1/10W, 1%, TF, ROHS PANASONIC H2511-02212-1/10W1-T

2 R34, R36 RES, SMD, 0603, 2.49k, 1/10W, 1%, TF, ROHS KOA H2511-02491-1/10W1-T

1 R14 RES, SMD, 0603, 22.6k, 1/16W, 1%, TF, ROHS VENKEL H2511-02262-1/10W1-T

4 R1, R2, R5, R6 RES, SMD, 0603, 499Ω, 1/10W, 1%, TF, ROHS KOA H2511-04990-1/10W1-T

2 R30, R31 RES, SMD, 0603, 49.9k, 1/10W, 1%, TF, ROHS VENKEL H2511-04992-1/10W1-T

1 R15 RES, SMD, 0603, 53.6k, 1/10W, 1%, TF, ROHS YAGEO H2511-05362-1/10W1-T

4 R16, R17, R28, R29 RES, SMD, 0603, 5.76k, 1/10W, 1%, TF, ROHS ROHM H2511-05761-1/10W1-T

2 R18, R19 RES, SMD, 0603, 590Ω, 1/10W, 1%, TF, ROHS VENKEL H2511-05900-1/10W1-T

2 R20, R23 RES, SMD, 0603, 80.6k, 1/10W, 1%, TF, ROHS VENKEL H2511-08062-1/10W1-T

0 DNP (R32, R33) RES, SMD, 1206, 1.5Ω, 1/4W, 1%, TF, ROHS VENKEL H2513-001R5-1/4W1-T

4 R41, R43, R45, R47 RES, SMD, 1206, 1.5Ω, 1/4W, 1%, TF, ROHS VENKEL H2513-001R5-1/4W1-T

5 R38, R40, R42, R44, R46 RES, SMD, 1206, 1.8Ω, 1/4W, 1%, TF, ROHS VENKEL H2513-001R8-1/4W1-T

5 S1 to S5 SWITCH-TOGGLE, SMD, ULTRAMINI, 1P, SPST MINI C&K

COMPONENTS GT11MSCBE-T

4 J7 to J10 MTG HDWR, CBL.TERMINAL-LUG and SCREW, 6 to 14AWG BERG/FCI KPA8CTP

Bill of Materials(Continued)

QTY REFERENCE DESCRIPTION MANUFACTURER PART NUMBER

Application Note 1291

7AN1291.0

May 17, 2007

ISL6228EVAL3Z Evaluation Board Schematic

40.2K

IRF7821

DNP

0.1UF

APR 16, 2007ISL6228EVAL3Z REV.B

JIA WEI

DNP

0.01UF

162K 590

2200PF

20K

22.1K

2200PF

OFF

1.5

1.07K

2.49K

3.3UH

PLACE R12,R56 CLOSE TO L1

3.01

1.8

DNP

1.8

DNP

1.5

1.5 1.8

1.8

1.5

DNP

0.01UF

OFF

ROUTE PGND1 TO Q3,Q4 PADS

80.6K

PLACE R13, R55 CLOSE TO L2

330UF

80.6K

5.76K

GND

590

53.6K

DNP

0.1UF

5.76K

DNP

4.7UF

DNP DNP

4.7UF

ROUTE PGND2 TO Q8,Q9 PADS

DNP

IRF7832

DNP

330UF

GND

DNP

DNP DNP

PGND

DNP

DNPDNP

VIN2

DNP

OFF

DNP

IRF7821

3.3UH

PGND

+5V

1OF1

+12V

OFF

PGND

VO2

VO1

IRF7832

VIN1

PGND

Q18

10UF

C13

1UF

C39

2N7002-7-F

C29

Q16

SUD50N03_07

TP13

R44

J10

FDS6990S

R26

R30

49.9K

+12V

R38

0.1UF

10K

R42

R32

FDS6990S

R34

1UF

C14

TP19

TP18

TP8

J14

R52

BAT54S

C18

10UF

R55

R13

C40

Q15

TP5

FDS6990S

C37

C11

1UF

C10

TP20

J13

R57

C21

C28

R49

R17

Q14

1UF

0.22UF

2N7002

R15

R54

R10

10K

TP21

TP17

R48

R51

J11

J12

TP16

TP15

C19

R27

R31

R39

R37

R36

R47 R46

Q13

TP4

TP7

R25

R24

TP2

TP10

TP9

R20

R18

R23

D1 R1

Q12

R2 D2

C16

C12

C31

+5V

10K

10UF

+12V

1UF

49.9K

2N7002-7-F

+5V

10K

1UF

10UF

499

+5V

2N7002

Q11

0.22UF

0.1UF

10UF

R40

TP3

Q10

+12V

Q10

0.1UF

R21

FDS6990S

R56

R12

1UF

R60

C30

1UF

R35

BAT54S

SUD50N03_07

C24C27

C23

C25

C22

C34

C32

C35

C33

TP11

TP12TP14

ISL6228CRZ

TP1

R16

R14

C26

R53

R59

R29

R19

10K

R50

R41

R45

C41

R43

HIP2100

TP6

R22

R11

C38

2N7002

499

C36

0.22UF

HIP2100

R58

R33

C20R28

C17

C15

0.22UF

VSS

VDD

VSS

VDD

VIN2

VCC1

VIN1

PGOOD2

FSET2

VO2

FB2

EN2

OCSET2

PHASE2

UGATE2

BOOT2

PVCC2

LGATE2

PGND2

PGND1

LGATE1

PVCC1

BOOT1

UGATE1

PHASE1

EN1

OCSET1

VO1

FB1

PGOOD1

FSET1

VCC2

RED

GRN

RED

GRN

PAGE:

DATE:

TITLE:

ENGINEER:

A A

B B

C C

FIGURE 12. ISL6228EVAL3Z SCHEMATIC

Application Note 1291

8AN1291.0

May 17, 2007

ISL6228EVAL3Z Evaluation Board Layout

FIGURE 13. TOP SILKSCREEN

Application Note 1291

9AN1291.0

May 17, 2007

FIGURE 14. BOTTOM SILKSCREEN

ISL6228EVAL3Z Evaluation Board Layout(Continued)

Application Note 1291

10 AN1291.0

May 17, 2007

FIGURE 15. LAYER 1

ISL6228EVAL3Z Evaluation Board Layout(Continued)

Application Note 1291

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