an1322

ISL6228HIEVAL3Z User Guide
®
Application Note
August 22, 2007
AN1322.1
Author: Jia Wei
Introduction
Recommended Equipment
The ISL6228HIEVAL3Z 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 1.05V or 1.2V,
pending the state of switch S5. Channel-2 output voltage is
1.2V. Each channel has an on-board dynamic-load
generator included for evaluating the transient-load
response. It applies a 300µs pulse of 20A load across VO1
and GND, and it also applies a 300µs pulse of 20A load
across VO2 and GND.
• (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
• VIN1: Input voltage to the power stage of Channel-1
- J14: VIN1 positive power input
- TP20: VIN1 positive voltage sense
- J14: VIN1 return power input
- TP21: VIN1 return voltage sense
The contents of this document include:
• Recommended Test Equipment
• Interface Connections
• Switch Descriptions
• VIN2: Input voltage to the power stage of Channel-2
- J1: VIN2 positive power input
- TP9: VIN2 positive voltage sense
- J2: VIN2 return power input
- TP10: VIN2 return voltage sense
• Test Point Descriptions
• Design Criteria
• Typical Performance
- Efficiency
- Start-up
- Shut-down
- Steady State, CCM
- Steady State, DCM
- Load-transient response
• VO1: Regulated output voltage from Channel-1
- J9: VO1 positive power output
- TP13: VO1 positive voltage sense
- J10: VO1 return power output
- TP14: VO1 return voltage sense
• Evaluation Board Documentation
- Bill of Materials
- Schematic
- Silk-screen Plots
- Board Layer Plots
• VO2: Regulated output voltage from Channel-2
- J7: VO2 positive power output
- TP11: VO2 positive voltage sense
- J8: VO2 return power output
- TP12: VO2 return voltage sense
TABLE 1. DC/DC DESIGN CRITERIA
PARAMETER
VALUE
UNITS
VIN
3.3 to 25
VDC
VO
0.6 to 5
VDC
Full-load
20
ADC
PWM Frequency
270, 300
kHz
1
• 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
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.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1322
Test Set-up
Test Point Descriptions
+ 12V
_
• J4: Scope-probe socket for measuring PHASE1
V
TP15
OFF
OFF
+
VIN2
_
J1
S2
ON
S3
TP16J11
ON
TP11
_
VO2
READING
J7
+
J2
J3
J5
TP1
ISL6228HIEVAL3Z
TP2
J14
J4
J13
OFF
VO2
J8
TP12
+
5V _
TP14 J10
J6
VO1 INCREASE
S5
S1
ON
S4
• 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
+
J12
OFF
• J12: Scope-probe socket for measuring the current of the
Channel-1 on-board transient-load emulator
_
VO1
J9
TP13
VIN1
+
• J6: Scope-probe socket for measuring VO1
_
+
• TP2: Monitor the 5V return input
• TP3: Monitor the PGOOD2 pin
ON
• TP4: Monitor the PGOOD1 pin
VO1
READING
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 VO Increase
- OFF: VO1 is 1.05V, determined by R15 and R23.
- ON: Parallel R49 with R15. VO1 is 1.2V.
• 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
• 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)
• TP15: Monitor the 12V positive input
• S3: Channel-2 Dynamic Load
- OFF: On-board Channel-2 dynamic load disabled
- ON: On-board Channel-2 dynamic load enabled
• TP19: Monitor the EN2 pin
2
• TP16: Monitor the 12V return input
• TP17: Monitor the EN1 pin
• TP18: Monitor the gate of transistor Q18
• TP20: Monitor the VIN2 positive input
• TP21: Monitor the VIN2 return input
AN1322.1
August 22, 2007
Application Note 1322
Typical Performance
100
100
VIN = 8V
90
85
VIN = 12V
80
VIN = 19V
75
70
90
85
VIN = 12V
80
75
VIN = 19V
70
65
65
60
VIN = 8V
95
EFFICIENCY (%)
EFFICIENCY (%)
95
60
0
2
4
6
8
10
12
IOUT (A)
14
16
18
20
0
2
4
6
8
10
12
14
FIGURE 2. CHANNEL-1 EFFICIENCY AT VO = 1.05V
18
20
FIGURE 3. CHANNEL-2 EFFICIENCY AT VO = 1.2V
VO1
VO1
PHASE1
PHASE1
VO2
VO2
PHASE2
FIGURE 4. CCM STEADY-STATE OPERATION, VIN = 12V,
VO1 = 1.05V, IO1 = 5A, VO2 = 1.8A, IO2 = 6A
PHASE2
FIGURE 5. DCM STEADY-STATE OPERATION, VIN = 12V,
VO1 = 1.5V, IO1 = 2A, VO2 = 1.8V, IO2 = 2A
IO1
IO2
VO1
VO2
PHASE1
FIGURE 6. TRANSIENT RESPONSE, VIN = 19V, VO = 1.05V,
IO = 1A/21A @ 2.55A/µs
3
16
IOUT (A)
PHASE2
FIGURE 7. TRANSIENT RESPONSE, VIN = 19V, VO = 1.2V,
IO = 1A/21A @ 2.55A/µs
AN1322.1
August 22, 2007
Application Note 1322
Typical Performance (Continued)
IO2
IO1
VO2
VO1
PHASE1
FIGURE 8. LOAD INSERTION RESPONSE, VIN = 19V,
VO = 1.05V, IO = 1A/21A @ 2.55A/µs
IO1
PHASE2
FIGURE 9. LOAD INSERTION RESPONSE, VIN = 19V,
VO = 1.8V, IO = 0.1A/5.1A @ 2.55A/µs
IO2
VO1
VO2
PHASE2
PHASE1
FIGURE 10. LOAD RELEASE RESPONSE, VIN = 19V,
VO = 1.05V, IO = 1A/21A @ 2.55A/µs
4
FIGURE 11. LOAD RELEASE RESPONSE, VIN = 19V,
VO = 1.2V, IO = 1A/21A @ 2.55A/µs
AN1322.1
August 22, 2007
Application Note 1322
Bill of Materials
QTY
REFERENCE
0
DNP (C8, C9)
2
C1, C3
5
DESCRIPTION
MANUFACTURER
PART NUMBER
CAP, RADIAL, 56µF, 25V, ROHS
SANYO
25SP56M
CAP, SMD, 0603, 1000pF, 16V, 10%, X7R, ROHS
VENKEL
H1045-00102-16V10-T
MURATA
H1045-00104-16V10-T
CAP, SMD, 0603, 1µF, 16V, 20%, Y5V, ROHS
MURATA
H1045-00105-16V20-T
CAP, SMD, 0603, 10µF, 6.3V, 20%, X5R, ROHS
TDK
H1045-00106-6R3V20-T
C20, C21, C37, C40, C41 CAP, SMD, 0603, 0.1µF, 16V, 10%, X7R, ROHS
6
C2, C7, C30, C31, C36,
C39
2
C18, C19
2
C5, C6
CAP, SMD, 0603, 1500pF, 50V, 10%, X7R, ROHS
MURATA
H1045-00152-50V10-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
4
C32 to C35
CAP, SMD, 0805, 10µF, 16V, 10%, X5R, ROHS
PANASONIC
H1046-00106-16V10-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
8
C22 to 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, POLARIZED RED/GRN
LUMEX
SSL-LXA3025IGC
2
L1, L2
PWR CHOKE COIL, SMD, 13x12.9, 0.82µH, 20%, 33A, ROHS Vishay
IHLP5050FDERR82M01
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
4
Q1, Q2, Q6, Q7
TRANSIST-MOS, N-CHANNEL, 8P, SOIC, 30V, 9.1mΩ RDS,
ROHS
INTERNATIONAL
RECTIFIER
IRF7821PBF
4
Q3, Q4, Q8, Q9
TRANSIST-MOS, N-CHANNEL, 8P, SOIC, 30V, 4.0mΩ RDS,
ROHS
INTERNATIONAL
RECTIFIER
IRF7832PBF
2
Q15, Q16
TRANSIST-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
10
R10, R11, R24, R25, R48, RESISTOR, SMD, 0603, 0Ω, 1/10W, TF, ROHS
R50, R55, R56, R59, R60
KOA
H2511-00R00-1/10W-T
RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS
KOA
H2511-01002-1/10W1-T
RES, SMD, 0603, 4.12k, 1/10W, 1%, TF, ROHS
PANASONIC
H2511-04121-1/10W1-T
5
R7, R8, R21, R22, R51
2
R35, R37
5
AN1322.1
August 22, 2007
Application Note 1322
Bill of Materials (Continued)
QTY
REFERENCE
1
R49
2
R26, R27
1
DESCRIPTION
MANUFACTURER
PART NUMBER
RES, SMD, 0603, 422k, 1/10W, 1%, TF, ROHS
YAGEO
H2511-04223-1/10W1-T
RES, SMD, 0603, 2k, 1/10W, 1%, TF, ROHS
KOA
H2511-02001-1/10W1-T
R3
RES, SMD, 0603, 18.2k, 1/10W, 1%, TF, ROHS
KOA
H2511-01822-1/10W1-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, 8.45k, 1/10W, 1%, TF, ROHS
KOA
H2511-08451-1/10W1-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, 140k, 1/10W, 1%, TF, ROHS
YAGEO
H2511-01403-1/10W1-T
4
R16, R17, R28, R29
RES, SMD, 0603, 4.53k, 1/10W, 1%, TF, ROHS
ROHM
H2511-04531-1/10W1-T
2
R18, R19
RES, SMD, 0603, 845Ω, 1/10W, 1%, TF, ROHS
VENKEL
H2511-08450-1/10W1-T
3
R14, R20, R23
RES, SMD, 0603, 105k, 1/10W, 1%, TF, ROHS
VENKEL
H2511-01053-1/10W1-T
0
DNP (R32)
RES, SMD, 1206, 1.5Ω, 1/4W, 1%, TF, ROHS
VENKEL
H2513-001R5-1/4W1-T
2
R38, R40
RES, SMD, 1206, 1.5Ω, 1/4W, 1%, TF, ROHS
VENKEL
H2513-001R5-1/4W1-T
3
R33, R39, R41
RES, SMD, 1206, 0.75Ω, 1/2W, 1%, TF, ROHS
SUSUMU
RL1632R-R750-F
6
R42 to R47
RES, SMD, 1206, 0.2Ω, 1/4W, 1%, TF, ROHS
VISHAY
WSL1206R2000FEA
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,
6AWG to 14AWG
BERG/FCI
6
KPA8CTP
AN1322.1
August 22, 2007
ISL6228HIEVAL3Z Evaluation Board Schematic
VIN2
845
R51
8
0.1UF
10K
S5
TP11
3
Q14
4
2N7002-7-F
TITLE:
TP18
C37
Q18
C6
1500PF
+5V
7
ENGINEER:
6
5
4
FIGURE 12. ISL6228HIEVAL3Z SCHEMATIC
3
C40
0.1UF
10UF
C32
C34
10UF
C28
330UF
C26
330UF
C24
330UF
330UF
C22
TP12
1UF
0.2
R46
0.2
R44
0.2
R42
1.5
1.5
TP13 R40
R38
DNP
R32
0.1UF
C41
10UF
C33
C35
10UF
C25
330UF
C23
330UF
C27
330UF
C29
VSS
HO
LI
HS
HI
R37
SUD50N03_07
J12
6
5
ISL6228HIEVAL3Z
REV.A
DATE:
APR 16, 2007
PAGE:
JIA WEI
2
A
Q16
4.12K
7
0.2
R19
HB
R47
R49
422K
2
0.2
2K
R45
0
J6
PGND
R36
8.45K
0.2
105K
8
0.75
140K
1
R39
R27
10UF
R25
C19
R23
U3
HIP2100
VDD
LO
0.75
S4
2N7002
R15
TP8
Q12
+12V
ON
B
J10
R43
C20
0.1UF
TP14
R28
4.53K
R41
FDS6990S
VO1
0
DNP
R60
0.8UH
330UF
L1
OFF
TP6
2N7002
J9
D6
BAT54S
A
SUD50N03_07
J11
ROUTE PGND1 TO Q3,Q4 PADS
OFF
Q15
0.75
+5V
5
C
GND
6
1UF
10K
S1
D1
RED
ON
R22
TP17
HI
R35
R33
499
R17
4.52K
0
DNP
HS
TP16
4.12K
7
C31
R11
10K
2
1
LI
DNP
Q4
8
7
HO
8
R34
PLACE R12,R56 CLOSE TO L1
FDS6990S
Q5
VSS
J8
+12V
+12V
TP15
8.45K
J4
R12
1UF
Q3
6
5
DNP
DNP
IRF7832 IRF7832
Q13
4
2N7002-7-F
HB
C30
S3
4
3
C15
0.22UF
Q5
Q2
3
0
IRF7821
10UF
C18
Q1
1
2
R56
1UF
10UF
C17
C11
C9
1UF
10UF
C13
2
R52
C7
TP21
IRF7821
D4
FB1
VO1
OCSET1
EN1
PHASE1
UGATE1
BOOT1
15
J14
2
16
LGATE1
PVCC1
PGOOD1
EP
29
R8
499
R6
17
PGND1
PGND
0
TP4
R50
0.01UF
ISL6228CRZ
FSET1
7
C3
GRN
VIN1
6
18
TP20
R53
0.22UF
19
VIN1
J13
8
9
10
11
12
13
14
R4
20
PGND2
VCC1
5
22.1K
PVCC2
21
LGATE2
U1
VCC2
4
1UF C38
BOOT2
VIN2
3
2K
C39
2
C2 0.22UF
C36
1UF
FSET2
R26
J5
PGND
0
+12V
U2
HIP2100
LO
VDD
R58
1UF
10UF
C16
C10
R16
4.52K
1
R59
C21
0.1UF
ON
OFF
28
27
26
25
24
23
22
R3
18.2K C4
DNP
R29
4.53K
VO2
1 OF 1
1
Application Note 1322
0.01UF
R57
R13
FDS6990S
ROUTE PGND2 TO Q8,Q9 PADS
PGOOD2
FB2
VO2
OCSET2
EN2
PHASE2
UGATE2
0
R54
R9 2
2 R10
C1
DNP
DNP
R30
DNP
0.8UH
49.9K
TP7
2
1
8
7
D
L2
R31
RED
GRN
D2
Q9
J7
PLACE R13, R55 CLOSE TO L2
D5
BAT54S
Q11
R2
0
J3
FDS6990S
IRF7832 IRF7832 Q10
Q8
10K
2N7002
B
0.22UF
6
5
DNP
R21
S2
OFF
4
3
C14
R24
105K
Q7
49.9K
ON
1500PF
IRF7821 Q10
R55
105K
R20
Q6
0
10K
845
TP10
IRF7821
D3
R14
TP19
R7
7
C
C5
R18
TP3
R1
499
R5
TP2
0
R48
GND
TP5
J2
499
D
C8
PGND
DNP
+5V
TP1
10UF
C12
J1
TP9
DNP
+5V
AN1322.1
August 22, 2007
Application Note 1322
ISL6228HIEVAL3Z Evaluation Board Layout
FIGURE 13. TOP SILKSCREEN
8
AN1322.1
August 22, 2007
Application Note 1322
ISL6228HIEVAL3Z Evaluation Board Layout (Continued)
FIGURE 14. BOTTOM SILKSCREEN
9
AN1322.1
August 22, 2007
Application Note 1322
ISL6228HIEVAL3Z Evaluation Board Layout (Continued)
FIGURE 15. LAYER 1
10
AN1322.1
August 22, 2007
Application Note 1322
ISL6228HIEVAL3Z Evaluation Board Layout (Continued)
FIGURE 16. LAYER 2
11
AN1322.1
August 22, 2007
Application Note 1322
ISL6228HIEVAL3Z Evaluation Board Layout (Continued)
FIGURE 17. LAYER 3
12
AN1322.1
August 22, 2007
Application Note 1322
ISL6228HIEVAL3Z Evaluation Board Layout (Continued)
FIGURE 18. LAYER 4
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
AN1322.1
August 22, 2007
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