an1398

ISL62383 Triple-Output Evaluation
Board User Guide
®
Application Note
July 31, 2008
Introduction
TABLE 2. ENABLE TRUTH TABLE
The ISL62383 evaluation board demonstrates the
performance of ISL62383 triple-output controller. The
ISL62383 controller includes two pulse-width modulation
(PWM) controllers featured with Intersil’s patented R3
technology, adjustable from 0.6V to 5.5V, and one linear
regulator LDO5, which generates a fixed 5V output and can
deliver up to 100mA.
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 two different evaluation boards which
provide flexible evaluation options. Table 1 shows a brief
description of the evaluation boards.
TABLE 1. EVALUATION BOARDS DESCRIPTION
EVALUATION BOARD
AN1398.0
CHANNEL-1
CHANNEL-2
OCP
ISL62383LOEVAL1Z
3.3V/8A
5V/8A
~10A
ISL62383HIEVAL1Z
1.05V/15A
1.5V/15A
~20A
EN1
EN2
START-UP SEQUENCE
Low
Low
Low
Float Both Channels outputs OFF simultaneously
Float
Low
Float
Float Both Channels outputs OFF simultaneously
Low
High
Channel-1 OFF, Channel-2 ON
High
Low
Channel-1 ON, Channel-2 OFF
High
High
Both Channels 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
Both Channels outputs OFF simultaneously
Both Channels outputs OFF simultaneously
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.
L
PHASEx
What’s Inside
The Evaluation Board Kit contains the following materials:
VO
CO
ROCSET
_
+
VROCSET
• ISL62383 Datasheet
RO
ISENx
• ISL62383 Evaluation Board User Guide (this document)
What’s Needed
IL
_
+
VRSENSE
ISL62383
10µA
OCSETx
• ISL62383xxEVAL1Z Evaluation Board
RSENSE
FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT
The following materials will be needed in order to perform
testing:
• Adjustable +25V, 30A Power Supply
• +12V, 100mA Power Supply
• Precision Digital Multimeter
• 3 Electronic Loads
For Channel-1, the ISL62383 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
ISL62383 declares an overcurrent fault. For a chosen
overcurrent set point IOC and current sense resistor RSENSE,
the value of ROCSET is determined by Equation 1:
• 4-Channel Oscilloscope
I OC • R SENSE
R OCSET = ------------------------------------10μA
Enable Control
Where:
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 ISL62383 datasheet waveforms. Table 2
is the Enable controller truth table.
1
(EQ. 1)
- ROCSET (Ω) is the resistor used to program the
overcurrent setpoint
- IOC is the output current threshold that will activate the
OCP circuit
- RSENSE is current sense resistor (R3 for Channel-1;
R25 for Channel-2)
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. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1398
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.
Connections and Test Points
NUMBER
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 R29, R34
for the rising edge, and R23, R30 for the falling edge. A +12V
power supply is needed to power the dynamic load
generator.
The following table describes the function and operation of the evaluation board.
NAME
FUNCTION/OPERATION
INTERFACES AND CONNECTIONS
TP3
VBAT
VIN positive power input
TP4
GND
VIN return power input
TP1
VOUT1
TP2
GND
Channel-1 positive power output
Channel-1 return power output
TP11
VOUT2
TP12
GND
Channel-2 return power output
Channel-2 positive power output
TP7
+12V
+12V positive power input, used for the power supply of the on-board dynamic-load generator
TP9
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
J6
FLOAT_EN1
Remove the jumper will float the EN1 pin
J7
FLOAT_EN2
Remove the jumper will float the EN2 pin
TP6
EN1
Test point of EN1 pin
TP8
EN2
Test point of EN2 pin
J1
PHASE2
Remove the jumper will float the FCCM pin
Scope-probe socket for measuring Channel-2 phase node
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
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, and FCCM, respectively
OFF: Low level for EN1, EN2, and FCCM, respectively
2
AN1398.0
July 31, 2008
Application Note 1398
Test Set-up
Figure 2 shows a typical test configuration.
+
VOUT2
(0.6V~5.5V)
-
+
LDO5 (5V)
+
VIN (5.5V~25V)
-
PROBE
+
12V
-
+
VOUT1
(0.6V~5.5V)
-
FIGURE 2. TYPICAL TEST CONFIGURATION
3
AN1398.0
July 31, 2008
Application Note 1398
ISL62383LOEVAL1Z Evaluation Board Bill of Materials
NO.
REFERENCE
DESIGNATOR
QTY
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
C11, C24
2
1µF
25V
10
GENERIC
SM_CAP_1206, 1µF, 25V, 10%, X7R, ROHS
8
C1, C2, C28, C29
4
4.7µF
10V
10
GENERIC
SM_CAP_0805, 4.7µF, 10V, 10%, X7R, ROHS
9
C21
1
4.7µF
10V
10
GENERIC
SM_CAP_1206, 4.7µF, 10V, 10%, X7R, ROHS
10
C16, C18, C31, C32
4
10µF
16V
10
GENERIC
SM_CAP_0805, 10µF, 16V, 10%, X5R, ROHS
11
C3
1
56µF
25V
20
SANYO-OSCON
RADIAL_POLCAP_RADIAL, 25SP56M, 56µF,
25V, 20%, CASE-CC
12
C4, C26
2
330µF
6.3V
10
SANYO-POSCAP
SM_POLCAP_SMD, 6TPF330M9L, 330µF, 6.3V,
10%, CAP_7343
13
R12, R15
2
750
1/10W
1
GENERIC
SM_RES_0603, 750, 1/10W, 1%, TF, ROHS
14
R8
1
19.6k
1/10W
1
GENERIC
SM_RES_0603, 19.6k, 1/10W, 1%, TF, ROHS
15
R9
1
24.3k
1/10W
1
GENERIC
SM_RES_0603, 24.3k, 1/10W, 1%, TF, ROHS
16
R11
1
10k
1/10W
1
GENERIC
SM_RES_0603, 10k, 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
R14
1
9.09k
1/10W
1
GENERIC
SM_RES_0603, 9.09k, 1/10W, 1%, TF, ROHS
19
R7, R18, R19, R22
4
15.8k
1/10W
1
GENERIC
SM_RES_0603, 15.8k, 1/10W, 1%, TF, ROHS
20
R16
1
45.3k
1/10W
1
GENERIC
SM_RES_0603, 45.3k, 1/10W, 1%, TF, ROHS
21
R20, R23, R33
3
1k
1/10W
1
GENERIC
SM_RES_0603, 1k, 1/10W, 1%, TF, ROHS
22
R30
1
1.58k
1/10W
1
GENERIC
SM_RES_0603, 1.58k, 1/10W, 1%, TF, ROHS
23
R17, R32
2
48.7k
1/10W
1
GENERIC
SM_RES_0603, 48.7k, 1/10W, 1%, TF, ROHS
24
R1, R2, R10
3
0
1/10W
1
GENERIC
SM_RES_0603, 0, 1/10W, 1%, TF, ROHS
25
R29, R34
2
200
1/10W
1
GENERIC
SM_RES_0603, 200, 1/10W, 1%, TF, ROHS
26
R5, R27
2
499
1/10W
1
GENERIC
SM_RES_0603, 499, 1/10W, 1%, TF, ROHS
27
R6, R21, R24, R28,
R31
5
100k
1/10W
1
GENERIC
SM_RES_0603, 100k, 1/10W, 1%, TF, ROHS
28
R35
1
0.7
1W
1
GENERIC
SM_RES_2512, 0.7, 1W, 1%, TF, ROHS
29
R37
1
0.5
1W
1
GENERIC
SM_RES_2512, 0.5, 1W, 1%, TF, ROHS
30
D1, D2
2
SSL_LXA3025IGC
LUMEX
SSL_LXA3025IGC_SMD-SSLLXA3025IGC,LED_3X2_5MM
31
D3, D4
2
BAT54S
DIODES
SM_SCHOTTKY_BAT54S-BAT54S, SOT23
32
Q2, Q4
2
IRF7821PBF
IR
30V 13.6A N-Channel HEXFET Power MOSFET
(Pb-free)
33
Q3, Q5
2
IRF7832PBF
IR
30V 20A N-Channel HEXFET Power MOSFET
(Pb-free)
34
Q1, Q6, Q10, Q12
4
2N7002-7-F
FAIRCHILD
2N7002_SOT23-2N7002-7-F, SOT23
35
Q11, Q13
2
SUD50N03-07
VISHAY
SUD50N03_07_TO252-SUD50N03-07,TO-252AA
VALUE
4
VOLTAGE TOL.
/POWER (%) MANUFACTURER
DESCRIPTION
AN1398.0
July 31, 2008
Application Note 1398
ISL62383LOEVAL1Z Evaluation Board Bill of Materials (Continued)
NO.
REFERENCE
DESIGNATOR
QTY
36
SW1, SW2
2
GT11MSCBE-T
C&K
GT11MSCKE_SMT-GT11MSCBE-T,GT13MSCKE
37 TP5, TP6, TP7, TP8,
TP9, TP10,
TP13,TP14, TP15
9
5002
KEYSTONE
TEST_POINT_THOLE-5002,MTP500X
38 TP1, TP2, TP3, TP4,
TP11, TP12
6
1514-2
KEYSTONE
TEST_POINT_THOLE-1514-2, TP-150C100P
39
J1, J2, J3, J5
4
131-5031-00
TEKTRONIX
SCOPE_PROBE_5P_CONN-131-5031-00,
TEK131-5031-00
40
J4, J6, J7
3
68000-236
FCI
CONN2_DIP2-68000-236, CONN2
41
U2
1
78B03S
GRAYHILL
DIP_SW3_SPST_DIP-78B03S, DIP6-SW3
42
U1
1
ISL62383HRTZ
INTERSIL
ISL62383HRTZ, 28 Ld 3x3 TQFN
43
U3, U4
2
HIP2100IBZ
INTERSIL
HIP2100_SOIC-HIP2100IBZ, SOIC8_150_50
44
L1, L2
2
4.7µH
VISHAY
VISHAY_IHLP_5050CE_SMT-20%-IHLP-5050CE01-4R7M,4.7µH, 24A, 20%, VISHAY_IHLP5050CE
45
R3, R25
2
Wire
GENERIC
Wire short
46
DCR SENSE
4
Wire
GENERIC
Wire short
47
Jumper Connector
3
SPC02SYAN
SULLINS
Connector Jumper for J4, J6, J7
48
1
PCB
TBD
ISL62383EVAL1Z REV A PCB
49
1
Label
TBD
LABEL, FOR SERIAL NUMBER AND BOM REV #
VALUE
50
C5, C27, C33, C34,
C20, C30
No-pop
51
R4, R26, R36, R38
No-pop
52
Q7, Q8, Q9, Q14
No-pop
5
VOLTAGE TOL.
/POWER (%) MANUFACTURER
20
DESCRIPTION
AN1398.0
July 31, 2008
Application Note 1398
ISL62383HIEVAL1Z Evaluation Board Bill of Materials
The ISL62383HIEVAL1Z evaluation board uses the same PCB and schematic as ISL62383LOEVAL1Z evaluation board but different bill of
materials (BOM). The following table shows the BOM difference of ISL62383HIEVAL1Z in comparison with ISL62383LOEVAL1Z.
NO.
REFERENCE
DESIGNATOR
QTY
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
R30
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
C30, C33
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-5050CE01-2R2M,2.2µH, 29A, 20%, VISHAY_IHLP5050CE
VALUE
6
VOLTAGE TOL.
/POWER (%) MANUFACTURER
DESCRIPTION
AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Schematic
R2
LDO5
F
HI
SW2
15.8K
1UF
10UF
C24
C22
10UF
C23
R18
C14
1200PF
750
R15
4.7UF
C28
4.7UF
C29
330UF
OPEN
C27
C20
OPEN
C30
OPEN
C26
R13
TP5
R14
9.09K
0.22UF
TP11
D
TP12
VOUT1
J5
VOUT2
J3
PHASE1
J1
PHASE2
C3
C
56UF
C17
TP9
J2
TP3
15.8K
R16
R19
45.3K
750
VBAT
R1
0
VBAT
1UF
HIP2100
VOUT2
4.7UF
TP4
2 C11 1
LI
R37
VSS
HS
OPEN
HB
HO
R36
C32
10UF
BAT54S
LO
SUD50N03_07
1.58K
U3
Q11
200
0.47
D3
R34
R30
VDD
68.1K
R6
100K
R5
C19
R35
VOUT1
C
Q9
EN1
10K
R12
Q10
0.68
R11
C31
2N7002
E
OPEN
C21
LDO5
LGATE1
BOOT1
PGOOD1
EP
C12
1K
PGND
VIN
FSET1
24.3K
IRF7832
Q5
ISL62383HRTZ LDO5
VCC1
1200PF
R33
U1
VCC2
10UF
R32
0.01UF
0
LGATE2
FCCM
VCC1
1UF
R9
R25
TP15
HIP2100
48.7K
499
R4
SSL_LXA3025IGC
TP13
100K
R28
SW1
R38
HI
OPEN
LI
HS
C8
FCCM
L2
4.7UH
J6
1 2
EN1
J7
1 2
EN2
J4
1 2
FCCM
U2
B
330UF
C5
OPEN
C33
OPEN
C34
OPEN
C4
4.7UF
C2
C1
L1
0
4.7UH
Q2
TP10
PHASE1
OPEN
Q7
TP2
78B03S
100K
R3
TP8
100K
R24
R7
15.8K
B
VCC1
TP6
IRF7821
100K
R21
VOUT1
4.7UF
TP1
C6
0.022UF
Q14
R31
OPEN
IRF7832
Q3
A
REV:
ENGINEER:
DATE:
DRAWN BY:
SHEET:
ISL62383LOEVAL1Z
AN1398.0
July 31, 2008
8
7
6
5
4
3
2
A
TITLE:
A
05/22/08
1
1
OF
1
Application Note 1398
HO
19.6K
C7
0.01UF
C10
1UF
FSET2
1
VSS
C9
VBAT
BOOT2
TP14
C16
LO
HB
PGOOD2
R8
1
10UF
BAT54S
0
0.22UF
U4
D
200
1K
R10
LDO5
Q13
SUD50N03_07
R23
VDD
OPEN
499
VOUT2
D4
R29
10UF
2 C15 1
10UF
Q12
C25
0.022UF
PHASE2
C18
2N7002
R22
15.8K
Q8
2 C13 1
1K
OPEN
Q4
FB2
VOUT2
ISEN2
OCSET2
EN2
PHASE2
UGATE2
R20
EN2
IRF7821
2N7002
Q1
FB1
VOUT1
ISEN1
OCSET1
EN1
PHASE1
UGATE1
R17
48.7K
VBAT
10UF
7
E
D2
+12V
GRN
D1
2N7002
Q6
RED
GRN
TP7
RED
SSL_LXA3025IGC
R26
0
OPEN
R27
F
Application Note 1398
ISL62383xxEVAL1Z Evaluation Board Layout
FIGURE 3. TOP SILKSCREEN
8
AN1398.0
July 31, 2008
Application Note 1398
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 4. BOTTOM SILKSCREEN
9
AN1398.0
July 31, 2008
Application Note 1398
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 5. LAYER 1
10
AN1398.0
July 31, 2008
Application Note 1398
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 6. LAYER 2
11
AN1398.0
July 31, 2008
Application Note 1398
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 7. LAYER 3
12
AN1398.0
July 31, 2008
Application Note 1398
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 8. 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
AN1398.0
July 31, 2008
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