1
®ISL62391, ISL62392 Triple-Output Evaluation
Board User Guide
Introduction
The ISL62391 and ISL62392 evaluation boards demonstrate
the performance of ISL62391 and ISL62392 triple -output
controllers. The ISL62391 and ISL62 392 controllers include
two pulse-width modulation (PWM) controllers featured with
Intersil’s patented R 3 techn ology, output adjustable from
0.6V to 5.5V, and a linear regulator (LDO3) that generates a
fixed 3.3V output and can deliver up to 100mA.
The evaluation board includes two Enable switches, an LED
Power-Good indicator and various test points. Each
switching channel has an on-board dynamic load generator
for evaluating the tran sient-load response. There are four
different evaluation boards which provide flexible evaluation
options. Table 1 shows a brief description of the evaluation
boards.
What’s Inside
The Evaluation Board Kit contains the following materials:
• ISL6239xxxEVAL1Z Evaluati on Board
• ISL62391, ISL62392 Datasheet
• ISL62391, ISL62392 Evaluation Board User Guide (this
document)
What’s Needed
The following material s will be needed in order to perform
testing:
• Adjustable +25V, 30A Power Supply
• +12V, 100mA Power Supply
• Precision Digital Multimeter
• 3 Electronic Loads
• 4-Channel Oscilloscope
Enable Control
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 ISL62391, ISL62392 datasheet
waveforms. Table 2 is the Enable controller truth table.
.
Resistor Current Sense Configuration
The evaluation board is pre-config ured 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.
For C ha n n el - 1, t h e ISL62391 and ISL62392 monit o r th e
OCSET1 pin and the ISEN1 pin voltages. Once the OCSET1
pin voltage is higher than th e ISEN1 pin voltage fo r more than
10µs, the ISL62391 and ISL62392 declare an overcurrent
fault. For a chosen overcurrent set po int IOC and current
sense resistor RSENSE, the value of ROCSET is determined
by Equation 1:
Where:
-R
OCSET (Ω) is the resistor used to program the
overcurrent setpoint
-I
OC is the output current threshold that will activate th e
OCP circuit
-R
SENSE is current sense resistor (R3 for Channel-1 and
R25 for Channel-2)
TABLE 1. EVALUATION BOARD DESCRIPTION
EVALUATION BOARD CHANNEL-1 CHANNEL-2 OCP
ISL62391LOEVAL1Z 3.3V/8A 5V/8A ~10A
ISL62391HIEVAL1Z 1.05V/15A 1.5V/15A ~20A
ISL62392LOEVAL1Z 3.3V/8A 5V/8A ~10A
ISL62392HIEVAL1Z 1.05V/15A 1.5V/15A ~20A
TABLE 2. ENABLE TRUTH TABLE
EN1 EN2 START-UP SEQUENCE
Low Low Both Channel outputs OFF simultaneously
Low Float Both Channel outputs OFF simultaneously
Float Low Both Channel outputs OFF simultaneously
Float Float Both Channel outputs OFF simultaneously
Low High Channel-1 OFF, Channel-2 ON
High Low Channel-1 ON, Channel-2 OFF
High High Both Channel 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
FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT
PHASEx
CO
L
VO
OCSETx
ISENx
RO
ISL62391
IL
10µA
+
_
VRSENSE
+
VROCSET
_
RSENSE
ROCSET
ISL62392
(EQ. 1)
ROCSET IOC RSENSE
•
10μA
-------------------------------------
=
July 31, 2008 AN1397.0Application Note
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.
2AN1397.0
July 31, 2008
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.
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 dynami c load generator applies a
300µs pulse load across VOUT and GND. The transient load
slew-rate can be trimmed by adjusting the resistors R28, R34
for the rising edge, and R29, R35 for the falling edge. A +12V
power supply is needed to power the dynamic load
generator.
Connections and Test Points The following table describes the function and operation of the evaluation boards.
NUMBER NAME FUNCTION/OPERATION
INTERFACES AND CONNECTIONS
TP3 VBAT VIN positive power input
TP4 GND VIN return power input
TP1 VOUT1 Channel-1 positive power output
TP2 GND Channel-1 return power output
TP11 VOUT2 Channel-2 positive power output
TP12 GND Channel-2 return power output
TP14 +12V +12V positive power input, used for the p ower supply of the on-board dynamic-load generator
TP15 GND +12V return power input
TEST POINTS
J3 PHASE1 Scope-probe socket for measuring Channel-1 phase node
J6 PHASE2 Scope-probe socket for measuring Channel-2 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 Remove the jumper will float the FCCM pin
J7 FLOAT_EN1 Remove the jumper will float the EN1 pin
J1 FLOAT_EN2 Remove the jumper will float the EN2 pin
TP13 EN1 Test point of EN1 pin
TP8 EN2 Test point of EN2 pin
TP9 LDO3EN Test point of LDO3EN pin
TP10 FCCM Test point of FCCM pin
POWER-GOOD INDICATOR
TP5 PGOOD Test point of PGOOD pin
D1 Power-Good indicator. Green when VOUT1 and VOUT2 are both in regulation.
LINEAR REGULATOR
TP6 LDO3 LDO3 linear regulator positive power output
TP7 GND LDO3 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, LDO3EN and FCCM, respectively
OFF: Low level for EN1, EN2, LDO3EN and FCCM, respectively
Application Note 1397
4AN1397.0
July 31, 2008
ISL62391LOEVAL1Z, ISL62392LOEVAL1Z Evaluation Board Bill of Materials
ISL62391LOEVAL1Z and ISL62392LOEVAL1Z evaluation boards use the same PCB and schematic, thus the same bill of materials except for the
controller U1.
NO REFERENCE
DESIGNATOR QTY VALUE VOLTAGE/
POWER TOL.
(%) MANUFACTURER DESCRIPTION
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, C21 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, C10, C28 4 4.7µF 10V 10 GENERIC SM_CAP_0805, 4.7µF, 10V, 10%, X7R, ROHS
9 C20 1 4.7µF 10V 10 GENERIC S M_CAP_1206, 4.7µF, 10V, 10%, X7R, ROHS
10 C16, C18, C29, C30 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 R11 1 10k 1/10W 1 GENERIC SM_RES_0603, 10k, 1/10W, 1%, TF, ROHS
15 R14 1 9.09k 1/10W 1 GENERIC SM_RES_0603, 9.09k, 1/10W, 1%, TF, ROHS
16 R13 1 68.1k 1/10W 1 GENERIC SM_RES_0603, 68.1k, 1/10W, 1%, TF, ROHS
17 R7, R18, R19, R22 4 15.8k 1/10W 1 GENERIC SM_RES_0603, 15.8k, 1/10W, 1%, TF, R OHS
18 R8 1 19.6k 1/10W 1 GENERIC SM_RES_0603, 19.6k, 1/10W, 1%, TF, ROHS
19 R9 1 24.3k 1/10W 1 GENERIC SM_RES_0603, 24.3k, 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 R27, R29, R33 3 1k 1/10W 1 GENERIC SM_RES_0603, 1k, 1/10W, 1%, TF, ROHS
22 R35 1 1.58k 1/10W 1 GENERIC SM_RES_0603, 1.58k, 1/10W, 1%, TF, ROHS
23 R26, R32 2 48.7k 1/10W 1 GENERIC SM_RES_0603, 48.7k, 1/10W, 1%, TF, ROHS
24 R1, R2 2 0 1/10W 1 GENERIC SM_RES_0603, 0, 1/10W, 1%, TF, ROHS
25 R28, R34 2 200 1/10W 1 GENERIC SM_RES_0603, 200, 1/10W, 1%, TF, ROHS
26 R5 1 499 1/10W 1 GENERIC SM_RES_0603, 499, 1/10W, 1%, TF, ROHS
27 R6, R10, R21, R23,
R24 5 100k 1/10W 1 GENERIC SM_RES_0603, 100k, 1/10W, 1%, TF, ROHS
28 R30 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 1 SSL_LXA3025IGC LUMEX SSL_LXA3025IGC_SMD-SSL-
LXA3025IGC,LED_3X2_5MM
31 D2, D3 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, Q10, Q12 3 2N7002-7-F FAIRCHILD 2N7002_SOT23-2N7002-7-F, SOT23
Application Note 1397
5AN1397.0
July 31, 2008
35 Q11, Q13 2 SUD50N03-07 VISHAY SUD50N03_07_TO252-SUD50N03-07, TO-
252AA
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 J2, J3, J5, J6 4 131-5031-00 TEKTRONIX SCOPE_PROBE_5P_CONN-131-5031-00,
TEK131-5031-00
40 J1, J4, J7 3 68000-236 FCI CONN2_DIP2-68000-236, CONN2
41 U2 1 78B04S GRAYHILL DIP_SW4_SPST_DIP-78B04S, DIP8-SW4
42 U1 1 ISL62391HRTZ,
ISL62392HRTZ INTERSIL ISL62391HRTZ, 28 Ld 4x4 TQFN
(ISL62392HRTZ, 28 Ld 4x4 TQFN)
43 U3, U4 2 HIP2100IBZ INTERSIL HIP2100_SOIC-HIP2100IBZ, SOIC8_150_50
44 L1, L2 2 4.7µH 20 VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP-
5050CE-01-4R7M, 4.7µH,24A,
20%,VISHAY_IHLP-5050CE
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 J1, J4, J7
48 1 PCB TBD ISL6239xEVAL1ZREVA PCB
49 1 Label TBD LABEL, FOR SERIAL NUMBER AND BOM REV #
50 C5, C27 2 No-pop
51 R4, R31, R36 3 No-pop
52 Q6, Q7, Q8, Q9 4 No-pop
ISL62391LOEVAL1Z, ISL62392LOEVAL1Z Evaluation Board Bill of Materials
ISL62391LOEVAL1Z and ISL62392LOEVAL1Z evaluation boards use the same PCB and schematic, thus the same bill of materials except for the
controller U1. (Continued)
NO REFERENCE
DESIGNATOR QTY VALUE VOLTAGE/
POWER TOL.
(%) MANUFACTURER DESCRIPTION
Application Note 1397
6AN1397.0
July 31, 2008
ISL62391HIEVAL1Z, ISL62392HIEVAL1Z Evaluation Board Bill of Materials
The ISL62391HIEVAL1Z, ISL62392HIEVAL1Z evaluation boards use the same PCB and schematic as the ISL62391LOEVAL1Z,
ISL62392LOEVAL1Z evaluation board but different bill of materials (BOM). The following table shows the BOM difference of ISL62391HIEVAL1Z,
ISL62392HIEVAL1Z in comparison with ISL62391LOEVAL1Z, ISL62392LOEVAL1Z.
NO. REFERENCE
DESIGNATOR QTY VALUE VOLTAGE
/POWER TOL.
(%) MANUFACTURER DESCRIPTION
1 Q6, Q8 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 R30 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 R35 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 C5, C27 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-5050CE-
01-2R2M,2.2µH, 29A, 20%, VISHAY_IHLP-
5050CE
Application Note 1397
7AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Schematic
IRF7821 OPEN
IRF7832
OPEN
ISL62391HRTZ
ISL62391LOEVAL1Z REV A
05/14/08STEVE LAUR
11
IRF7821
OPEN
IRF7832
OPEN
OPEN
OPEN
PHASE1
Q3
Q7
4.7UF
1UF
C14
R1
0
TP6
Q8
LDO3EN
100K
R24
U2
4.7UH
L1
4.7UH
L2
0
R25
0
R3
R21
100K
R23
PHASE2
R31
0.68
OPEN
R30
48.7K
R29
R4
OPEN
R5
1UF
OPEN
R36
0.47
R37
D1
VCC
750
R12C12
1200PF
TP10
C25
0.022UF
C6
U1
TP15
SW2
R33R32
SW1
U4
R27R26
TP14
TP2
C5
C4
C2
C1
J4
R10
TP9 TP4
TP8
TP13
C3
TP3
J1
J7
C15
J6J3
TP7
J5J2
C17
R11
C16
R9
C8
C7
R8
TP12
C28
C19
C29
TP11
Q1
TP5
C24
C22
R6
C18
R2
C30
330UF
VOUT1
4.7UF
10UF
45.3K
10UF
EN1
10UF
10UF
10UF
VOUT2
VOUT1
0.01UF
HIP2100
4.7UF
10UF
78B04S
VCC
PHASE1
10K
1K
48.7K
100K
VOUT1
1UF
LDO3
0.22UF
0
4.7UF
EN2
56UF
19.6K
R16
HIP2100
PVCC
LDO3EN
C9
0.01UF
TP1
C27
C26
R13
68.1K
15.8K
R19
15.8K
R22
1K
R35
1.58K
R34
200
BAT54S
D3
D2
BAT54S
100K
C11
10UF
C23
330UF
R7
PHASE2
Q4
Q5
Q6 Q2
200
R28
2N7002
FCCM
EN2
15.8K
R18
750
R14
9.09K
C21
1UF
PVCC
10UF
1K
2N7002
Q12
2N7002
Q11
SUD50N03_07
Q13
SUD50N03_07
SSL_LXA3025IGC
499
24.3K
VOUT2
EN1
100K
R15
1200PF
0.22UF
Q9
4.7UF
C10
VOUT2
FCCM
C13
C20
U3
Q10
0.022UF
15.8K
1
2
1
2
1
2
HI
LO
HS
HO
LI
VSS
VDD
HB
+12V
HI
LO
HS
HO
LI
VSS
VDD
HB
EP
VOUT1
OCSET2
FB2
ISEN2
VOUT2
EN2
PHASE2
UGATE2
BOOT2
LGATE2
PGND
PVCC
VIN
LDO3
LGATE1
BOOT1
UGATE1
PHASE1
EN1
OCSET1
ISEN1
FB1
FSET1
FSET2
LDO3EN
PGOOD
FCCM
VCC
VBAT
VBAT
VBAT
VBAT
RED
GRN
TITLE:
ENGINEER:
DRAWN BY:
SHEET:
DATE:
REV:
OF
E
D
C
B
A
765432
1
APPR
.
DATE
DESCRIPTION
LTR
ZONE
E
D
C
B
A
FF
8
Application Note 1397
8AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Layout
FIGURE 3. TOP SILKSCREEN
Application Note 1397
9AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 4. BOTTOM SILKSCREEN
Application Note 1397
10 AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 5. LAYER 1
Application Note 1397
11 AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 6. LAYER 2
Application Note 1397
12 AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 7. LAYER 3
Application Note 1397
13
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 A pplicat i on Note or Technical Brief is current befor e procee di ng.
For information regarding Intersil Corporation and its products, see www.intersil.com
AN1397.0
July 31, 2008
ISL6239xxxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 8. LAYER 4
Application Note 1397
