1
®ISL62383 Triple-Output Evaluation
Board User Guide
Introduction
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 gen erator 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.
What’s Inside
The Evaluation Board Kit contains the following materials:
• ISL62383xxEVAL1Z Evaluation Board
• ISL62383 Datasheet
• ISL62383 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 ISL62383 datasheet waveforms. Table 2
is the Enable controller truth table.
Resistor Current Sense Configuration
The Evaluation Board is pre-confi gured 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 Channel-1, the ISL62383 monitors the OCSET1 pi n and
the ISEN1 pin voltages. Once the OCSET1 pin voltage is
higher than the ISEN1 pin volt age for more than 10µ s, the
ISL62383 declares an ov er cu rr en t fa ul t. Fo r a ch o se n
overcurrent set point 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;
R25 for Channel-2)
TABLE 1. EVALUATION BOARDS DESCRIPTION
EVALUATION BOARD CHANNEL-1 CHANNEL-2 OCP
ISL62383LOEVAL1Z 3.3V/8A 5V/8A ~10A
ISL62383HIEVAL1Z 1.05V/15A 1.5V/15A ~20A
TABLE 2. ENABLE TRUTH TABLE
EN1 EN2 START-UP SEQUENCE
Low Low Both Channels outputs OFF simultaneously
Low Float Both Channels outputs OFF simultaneously
Float Low Both Channels outputs OFF simultaneously
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
FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT
PHASEx
CO
LVO
OCSETx
ISENx
RO
ISL62383
IL
10µA
+
_
VRSENSE
+
VROCSET
_
RSENSE
ROCSET
(EQ. 1)
ROCSET IOC RSENSE
•
10μA
-------------------------------------
=
July 31, 2008 AN1398.0Application 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.
2AN1398.0
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 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.
Connections and Test Points The following table describes the function and operation of the evaluation board.
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
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 Remove the jumper will float the FCCM pin
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 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
Application Note 1398
4AN1398.0
July 31, 2008
ISL62383LOEVAL1Z Evaluation Board Bill of Materials
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, 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-SSL-
LXA3025IGC,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
Application Note 1398
5AN1398.0
July 31, 2008
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 78B0 3S 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 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 J4, J6, J7
48 1 PCB TBD ISL62383EVAL1Z REV A PCB
49 1 Label TBD LABEL, FOR SERIAL NUMBER AND BOM REV #
50 C5, C27, C33, C34,
C20, C30 No-pop
51 R4, R26, R36, R38 No-pop
52 Q7, Q8, Q9, Q14 No-pop
ISL62383LOEVAL1Z Evaluation Board Bill of Materials (Continued)
NO. REFERENCE
DESIGNATOR QTY VALUE VOLTAGE
/POWER TOL.
(%) MANUFACTURER DESCRIPTION
Application Note 1398
6AN1398.0
July 31, 2008
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 VALUE VOLTAGE
/POWER TOL.
(%) MANUFACTURER DESCRIPTION
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_06 03, 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_06 03, 4.02k, 1/10W, 1%, TF, ROHS
13 R12, R15 2 590 1/10W 1 GENERIC SM_RES_06 03, 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-5050CE-
01-2R2M,2.2µH, 29A, 20%, VISHAY_IHLP-
5050CE
Application Note 1398
7AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Schematic
OPEN
05/22/08
A
ISL62383LOEVAL1Z
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
ISL62383HRTZ
11
R20
TP13
SSL_LXA3025IGC
VOUT1
9.09K
TP5
0
R3
0
R25
R23
0.68
R35
R26
OPEN
R4
OPEN
BAT54S
R29
R37
R11
R34
R30
R16
R15
R12C12
C14
C6
L1
C25
L2
R18
R7
R19
R14 R13
499
0.47
LDO5
PHASE2
1K
EN1
19.6K
1UF
10UF
4.7UF
FCCM
VOUT2
10UF
1K
10UF
1UF
10UF
HIP2100
100K
0
EN2
VOUT1
56UF
0
PHASE2
BAT54S
100K
PHASE1
VCC1
FCCM
10UF
1UF
48.7K
10UF
10UF
10UF
EN1
0.22UF
EN2
100K
100K
78B03S
0.22UF
100K
1
2
1
2
1
2
1
1
0.01UF
VOUT2
200
200
1.58K
24.3K
45.3K
750
750
1200PF
1200PF
4.7UH
1K
0.022UF
HIP2100
1UF
0.01UF
0.022UF
15.8K
15.8K
15.8K
15.8K
68.1K
PHASE1
48.7K
LDO5
499
10K
LDO5
0
SSL_LXA3025IGC
TP7
R24
R21
R31
TP10
TP8
TP6
U2
TP9
C15
C13
C11
J4
C32
R36
J7
SW2
J6
U3
TP4
J1
J3
R1
C3
D3
TP3
C17
J5J2
Q10
C31
R33
C16
TP15
SW1
R9
C8
C10
C21
C7
U1
U4
D4
R10
Q12
C19
C18
R17
Q1
D2
R6
R28
C24
C23
C22
R5
Q6
D1
R2
R27
R22
4.7UH
TP14
TP1
TP2
4.7UF
C1
4.7UF
C2
TP11
TP12
C29
4.7UF
4.7UF
C28
VOUT2
R32
2N7002 2N7002
C27
C26
C30
C20
C4
C5
C33
C34
330UF
Q7
Q14
IRF7832
Q3
IRF7821
Q2
330UF
IRF7832
Q5 Q9
Q8
IRF7821
Q4
2N7002
2N7002
Q11
SUD50N03_07
Q13
R38
SUD50N03_07
R8
C9
VCC1
VOUT1
1
2
RED
GRN
1
2
1
2
HI
LO
HS
HO
LI
VSS
VDD
HB
+12V
HI
LO
HS
HO
LI
VSS
VDD
HB
EP
FB1
OCSET2
FB2
ISEN2
VOUT2
EN2
PHASE2
UGATE2
BOOT2
LGATE2
PGND
LDO5
VIN
LGATE1
BOOT1
UGATE1
PHASE1
EN1
OCSET1
ISEN1
VOUT1
PGOOD1
FSET1
FSET2
VCC1
PGOOD2
VCC2
FCCM
VBAT
VBAT
VBAT
VBAT
RED
GRN
TITLE:
ENGINEER:
DRAWN BY:
SHEET:
DATE:
REV:
OF
E
D
C
B
A
765432
1
E
D
C
B
A
FF
8
Application Note 1398
8AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Layout
FIGURE 3. TOP SILKSCREEN
Application Note 1398
9AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 4. BOTTOM SILKSCREEN
Application Note 1398
10 AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 5. LAYER 1
Application Note 1398
11 AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 6. LAYER 2
Application Note 1398
12 AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 7. LAYER 3
Application Note 1398
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 curren t bef ore pr ocee di ng.
For information regarding Intersil Corporation and its products, see www.intersil.com
AN1398.0
July 31, 2008
ISL62383xxEVAL1Z Evaluation Board Layout (Continued)
FIGURE 8. LAYER 4
Application Note 1398
