Intersil ISL6228EVAL3Z User Manual

®

ISL6228EVAL3Z User Guide

Application Note May 17, 2007

Introduction

The ISL6228EVAL3Z evaluation board demonstrates the performance of the ISL6228 dual-channel PWM controller. The ISL6228 features Intersil's Robust Ripple Regulator (R 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 V and GND, and it applies a 300µs pulse of 5A load across V

and GND.

O2

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

TABLE 1. DC/DC DESIGN CRITERIA

PARAMETER VALUE UNITS

V

IN

V

O

Full-load 8 ADC

PWM Frequency 270, 300 kHz

3.3 to 25 VDC

0.6 to 5 VDC

O1

AN1291.0

Author: Jia Wei

Recommended Equipment

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

3

)

• (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

: Input voltage to the power stage of Channel-1

IN1

- J14: V

-TP20: V

- J14: V

-TP21: V

•V

IN2

-J1: V

-TP9: V

-J2: V

-TP10: V

•V

O1:

-J9: VO1 positive power output

-TP13: V

- J10: V

-TP14: VO1 return voltage sense

•V

: Regulated output voltage from Channel-2

O2

-J7: VO2 positive power output

-TP11: V

-J8: V

-TP12: V

• 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

positive power input

IN1

positive voltage sense

IN1

return power input

IN1

return voltage sense

IN1

: Input voltage to the power stage of Channel-2

positive power input

IN2

positive voltage sense

IN2

return power input

IN2

return voltage sense

IN2

Regulated output voltage from Channel-1

positive voltage sense

O1

return power output

O1

positive voltage sense

O2

return power output

O2

return voltage sense

O2

1

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.

Application Note 1291

Test Set-up

_

12V+

+

TP15 TP16

OFF

+

V

IN2

_

+

5V

_

V

IN1

+

J1

J2

TP1 TP2

J14

J13

VO1 INCREASE

ISL6228EVAL3Z

ON

J3

J4

OFF ON

ON

S3

J5

J6

OFF ON

S2

S1 S4S5

J11

TP11

J7

J8

TP12

J10

TP14

J9

TP13

J12

V

_

+

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 V

-OFF: V

O1

- ON: Parallel R

• 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

Increase

O

is 1.5V, determined by R15 and R23.

with R15. VO1 is 1.8V.

49

V

READING

V

O1

READING

Test-point Descriptions

• J4: Scope-probe socket for measuring PHASE1

_

V

O2

+

V

O2

_

V

O1

+

• J6: Scope-probe socket for measuring V

O1

• 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 V

O2

• 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 R

and R20; Useful for

24

Channel-1 loop gain measurement.

• TP6: The common node of R

and R23; Useful for

25

Channel-2 loop gain measurement

• TP7: The V

side of R24; Useful for Channel-1 loop gain

O1

measurement.

• TP8: The V

side of R25; Useful for Channel-1 loop gain

O2

measurement.

• TP9: Monitor the V

• TP10: Monitor the V

• TP11: Monitor the positive V

• TP12: Monitor the V

• TP13: Monitor the positive V

• TP14: Monitor the V

positive input

IN1

return input

IN1

return output

O1

return output

O2

O1

O2

output

• TP15: Monitor the 12V positive input

• TP16: Monitor the 12V return input

• TP17: Monitor the EN1 pin

• TP18: Monitor the gate of transistor Q

18

• TP19: Monitor the EN2 pin

• TP20: Monitor the V

• TP21: Monitor the V

positive input

IN2

return input

IN2

2

AN1291.0

May 17, 2007

Application Note 1291

Typical Performance

100

VIN = 8V

95

90

85

80

75

EFFICIENCY (%)

70

65

60

012345678

VIN = 12V

VIN = 19V

I

OUT

(A)

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

V

O1

100

VIN = 8V

95

90

85

80

75

EFFICIENCY (%)

70

65

60

01 234 5678

VIN = 12V

VIN = 19V

(A)

I

OUT

V

O1

V

O2

FIGURE 4. CCM STEADY-STA TE OPERA TION, V

V

= 1.5V, IO1=3A, VO2= 1.8A, IO2=4A

O1

I

O1

V

O1

PHASE1

PHASE2

= 12V,

IN

PHASE1

V

O2

FIGURE 5. DCM STEADY-STA TE OPERA T ION, V

V

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

O1

I

O2

V

O2

PHASE2

=12V,

IN

PHASE2

FIGURE 6. TRANSIENT RESPONSE, V

I

= 0.1A/4.6A @ 2.55A/µs

O

IN

3

= 19V, VO=1.5V,

FIGURE 7. TRANSIENT RESPONSE, V

I

= 0.1A/5.1A @ 2.55A/µs

O

= 19V, VO=1.8V,

IN

May 17, 2007

AN1291.0

Typical Performance (Continued)

I

O1

V

O1

Application Note 1291

I

O2

V

O2

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

V

= 1.5V, IO= 0.1A/4.6A @ 2.55Aµs

O

I

O1

V

O1

FIGURE 10. LOAD RELEASE RESPONSE, V

V

= 1.5V, IO= 0.1A/4.6A @ 2.55A/µs

O

IN

= 19V,

PHASE1

FIGURE 9. LOAD INSERTION RESPONSE, V

V

= 1.8V, IO= 0.1A/5.1A @ 2.55A/µs

O

I

O2

V

O2

FIGURE 11. LOAD RELEASE RESPONSE, V

V

= 1.8V, IO= 0.1A/5.1A @ 2.55A/µs

O

IN

PHASE2

=19V,

IN

PHASE2

= 19V,

4

AN1291.0

May 17, 2007

Application Note 1291

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-L O W ESR, SMD, D 3 L , 330µF, 6. 3 V, 2 0 % , POSCAP, ROHS SANYO 6TPF330M9L 0 DNP (C22, C23, C25, C26,

C28, C29)

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

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

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-S CH OT TK Y, SMD, SOT2 3, 3 P, 3 0V, 20 0m A, DU AL DI O DE 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, 1 15mA, 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, 9.1mΩ RDS,

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

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

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

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

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

CAP-LOW ESR, S MD, D3L, 330µF, 6.3V, 2 0 %, POSCAP, ROHS SANYO 6TPF330M9L

111-0702-001

COMPONENTS

111-0703-001

IRF7821PBF

IRF7832PBF

ROHS

COMPONENTS

INTERNATIONAL RECTIFIER

VISHAY SUD50N03-07-E3

5

AN1291.0

May 17, 2007

Application Note 1291

Bill of Materials (Continued)

QTY REFERENCE DESCRIPTION MANUFACTURER PART NUMBER

10 R10, R11, R24, R25, R48,

R50, R55, R56, R59, R60 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

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

RESISTOR, SMD, 0603, 0Ω, 1/10W, TF, ROHS KOA H2511-00R00-1/10W-T

GT11MSCBE-T

COMPONENTS

6

AN1291.0

May 17, 2007

7

AN1291.0

May 17, 2007

ISL6228EVAL3Z Evaluation Board Schematic

40.2K

IRF7821

DNP

0

DNP

0.1UF

APR 16, 2007ISL6228EVAL3Z REV.B

JIA WEI

DNP

0.01UF

162K 590

2200PF

20K

22.1K

ON

2200PF

OFF

1.5

2K

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

ON

80.6K

5.76K

GND

590

53.6K

ON

DNP

0.1UF

5.76K

DNP

0

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

0

DNP

0

IRF7821

3.3UH

ON

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

U2

+12V

R38

0.1UF

10K

Q2

R42

R32

8

D3

FDS6990S

3

6

R34

1UF

Q1

C14

TP19

TP18

TP8

J14

R52

21

20

19

18

BAT54S

J4

C18

10UF

R55

R13

3

4

C40

Q15

5

TP5

FDS6990S

C37

C6

4

C11

1UF

13

0

C10

TP20

J13

L2

R57

J6

0

C21

C28

Q8

22

R49

R17

R3

Q14

Q3

12

2

3

4

C4

U1

R8

1UF

0.22UF

2N7002

R15

R54

0

R10

0

10K

TP21

TP17

R48

S5

R51

J11

J12

TP16

TP15

C19

1

8

4

3

5

2

R27

R31

R39

R37

R36

D6

R47 R46

S3

Q13

7

6

TP4

TP7

R25

R24

TP2

TP10

TP9

R20

R18

C5

R23

S1

D1

R1

R5

R7

Q12

R6

R2

D2

C1

C3

J9

J8

C9

C16

C12

C31

J2

J1

Q4

1

2

8

6 5

1

2

7

4

Q7

0

+5V

10K

22

10UF

+12V

1UF

49.9K

2N7002-7-F

+5V

10K

1UF

0

10UF

499

+5V

2

C2

2N7002

Q11

R9

R4

0.22UF

5

281262725

17

15

11

9

8

7

6

29

J3

5

J7

8

0.1UF

10UF

3

L1

R40

TP3

Q10

+12V

Q10

0.1UF

R21

14

FDS6990S

R56

R12

1UF

Q6

Q9

C8

Q5

1

D4

7

Q5

R60

J5

C30

1UF

R35

BAT54S

D5

SUD50N03_07

2

C24C27

C23

C25

C22

C34

C32

C35

C33

TP11

TP12TP14

10

ISL6228CRZ

S2

TP1

R16

24

R14

C26

C7

R53

R59

R29

R19

10K

R50

R41

R45

C41

R43

HIP2100

TP6

R22

R11

C38

2N7002

499

C36

0.22UF

6

HIP2100

U3

R58

7

R33

S4

C20R28

C17

C15

0.22UF

16

23

HI

LO

HS

HO

LI

VSS

VDD

HB

HI

LO

HS

HO

LI

VSS

VDD

HB

EP

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

D

1

2

3

4

45

56

6

7

8

FIGURE 12. ISL6228EVAL3Z SCHEMATIC

Application Note 1291

ISL6228EVAL3Z Evaluation Board Layout

8

FIGURE 13. TOP SILKSCREEN

AN1291.0

May 17, 2007

Application Note 1291

ISL6228EVAL3Z Evaluation Board Layout (Continued)

9

FIGURE 14. BOTTOM SILKSCREEN

AN1291.0

May 17, 2007

Application Note 1291

ISL6228EVAL3Z Evaluation Board Layout (Continued)

10

FIGURE 15. LAYER 1

AN1291.0

May 17, 2007

Application Note 1291

ISL6228EVAL3Z Evaluation Board Layout (Continued)

11

FIGURE 16. LAYER 2

AN1291.0

May 17, 2007

Application Note 1291

ISL6228EVAL3Z Evaluation Board Layout (Continued)

12

FIGURE 17. LAYER 3

AN1291.0

May 17, 2007

Application Note 1291

ISL6228EVAL3Z Evaluation Board Layout (Continued)

Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding.

For information regarding Intersil Corporation and its products, see www.intersil.com

13

FIGURE 18. LAYER 4

AN1291.0

May 17, 2007