USER’S MANUAL
AN1291
Rev 0.00
May 17, 2007
ISL6228EVAL3Z
Evaluation Board
AN1291 Rev 0.00 Page 1 of 14
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 (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
AN1291 Rev 0.00 Page 2 of 14
May 17, 2007
ISL6228EVAL3Z
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 VO Increase
- OFF: VO1 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
S2
J1
J2
J9
J10
ISL6228EVAL3Z
ON
OFF
TP11
+
_
5V
+
_
VO1
+
_
VO2
READING
J14
J13
TP1
TP2
VIN1
VIN2
_
+
S3
S1 S4S5
ON
OFF
ON
OFF
ON
OFF
VO1 INCREASE
J7
J8 VO2
_
+
TP12
TP14
TP13
J4
J3 J5
J6
V
+_
VO1
READING
V
+_
J12
J11
TP15 TP16
12V+_
AN1291 Rev 0.00 Page 3 of 14
May 17, 2007
ISL6228EVAL3Z
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)
60
65
70
75
80
85
90
95
100
012345678
VIN = 12V
VIN = 19V
VIN = 8V
IOUT (A)
EFFICIENCY (%)
60
65
70
75
80
85
90
95
100
01 234 5678
VIN = 8V
VIN = 19V
VIN = 12V
VO1
PHASE1
VO2
PHASE2
VO1
PHASE1
VO2
PHASE2
VO1
PHASE1
IO1
VO2
PHASE2
IO2
AN1291 Rev 0.00 Page 4 of 14
May 17, 2007
ISL6228EVAL3Z
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
AN1291 Rev 0.00 Page 5 of 14
May 17, 2007
ISL6228EVAL3Z
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, 9.1m RDS,
ROHS
INTERNATIONAL
RECTIFIER
IRF7821PBF
2 Q1, Q6 TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC, 30V, 9.1m RDS,
ROHS
INTERNATIONAL
RECTIFIER
IRF7821PBF
0 DNP (Q4, Q9) TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC, 30V, 4.0m RDS,
ROHS
INTERNATIONAL
RECTIFIER
IRF7832PBF
2 Q3, Q8 TRANSISTOR-MOS, N-CHANNEL, 8P, SOIC, 30V, 4.0m RDS,
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, 2, 1/10W, 1%, TF, ROHS YAGEO H2511-00020-1/10W1-T
0 DNP (R12, R13, R57, R58) RESISTOR, SMD, 0603, 0, 1/10W, TF, ROHS KOA H2511-00R00-1/10W-T
AN1291 Rev 0.00 Page 6 of 14
May 17, 2007
ISL6228EVAL3Z
10 R10, R11, R24, R25, R48,
R50, R55, R56, R59, R60
RESISTOR, SMD, 0603, 0, 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, 499, 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, 590, 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, 1.5, 1/4W, 1%, TF, ROHS VENKEL H2513-001R5-1/4W1-T
4 R41, R43, R45, R47 RES, SMD, 1206, 1.5, 1/4W, 1%, TF, ROHS VENKEL H2513-001R5-1/4W1-T
5 R38, R40, R42, R44, R46 RES, SMD, 1206, 1.8, 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
AN1291 Rev 0.00 Page 7 of 14
May 17, 2007
ISL6228EVAL3Z
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
2K
1.07K
1.07K
2.49K
2.49K
3.3UH
PLACE R12,R56 CLOSE TO L1
3.01
1.8
DNP
DNP
1.8
DNP
1.5
1.5 1.8
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
5.76K
5.76K
DNP
0
4.7UF
DNP DNP
4.7UF
ROUTE PGND2 TO Q8,Q9 PADS
DNP
DNP
DNP
IRF7832
DNP
330UF
GND
DNP
DNP DNP
PGND
DNP
DNP
DNP
DNPDNP
VIN2
DNP
OFF
0
DNP
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
10UF
+12V
1UF
49.9K
2N7002-7-F
+5V
10K
1UF
0
10UF
499
499
499
+5V
2
2
C2
2N7002
Q11
R9
R4
0.22UF
5
28
1
26
27
25
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
DD
1
1
2
2
3
3
4
45
56
6
7
7
8
8
FIGURE 12. ISL6228EVAL3Z SCHEMATIC
AN1291 Rev 0.00 Page 8 of 14
May 17, 2007
ISL6228EVAL3Z
ISL6228EVAL3Z Evaluation Board Layout
FIGURE 13. TOP SILKSCREEN
AN1291 Rev 0.00 Page 9 of 14
May 17, 2007
ISL6228EVAL3Z
FIGURE 14. BOTTOM SILKSCREEN
ISL6228EVAL3Z Evaluation Board Layout (Continued)
AN1291 Rev 0.00 Page 10 of 14
May 17, 2007
ISL6228EVAL3Z
FIGURE 15. LAYER 1
ISL6228EVAL3Z Evaluation Board Layout (Continued)
AN1291 Rev 0.00 Page 11 of 14
May 17, 2007
ISL6228EVAL3Z
FIGURE 16. LAYER 2
ISL6228EVAL3Z Evaluation Board Layout (Continued)
AN1291 Rev 0.00 Page 12 of 14
May 17, 2007
ISL6228EVAL3Z
FIGURE 17. LAYER 3
ISL6228EVAL3Z Evaluation Board Layout (Continued)
AN1291 Rev 0.00 Page 13 of 14
May 17, 2007
ISL6228EVAL3Z
FIGURE 18. LAYER 4
ISL6228EVAL3Z Evaluation Board Layout (Continued)
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Refer to "http://www.renesas.com/" for the latest and detailed information.
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© 2018 Renesas Electronics Corporation. All rights reserved.
Colophon 7.0
(Rev.4.0-1 November 2017)
Notice
1. Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples. You are fully responsible for
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