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ISL73847SEHEV2Z
The ISL73847SEHEV2Z evaluation board
benchmarks the performance of the
dual-phase buck controller. The evaluation board is
optimized for a 4.5V to 15V input operation to
generate a 50A max, 1V output. Input and output
connections, test points, and jumper settings on the
board provide customers an easy-to-use evaluation
platform for point-of-load power applications.
Specifications
▪ Buck Power Supply input (PVIN): 4.5V to 15V
▪ Controller Analog Supply input (VDD): 4.5V to 19V
▪ Preset output voltage: 1V
▪ Preset Switching Frequency: 500kHz
▪ Maximum dual-phase output current: 50A
▪ Maximum single-phase output current: 25A
▪ Preset droop regulation
22µF
0.1µF
VFB-
100nF
VREF
604Ω
DROOP
VFB+
56nF
22nF
SS
8.2nF
4.22kΩ
COMP
94.2kΩ
FS
330pF
SYNC-I
SYNC-O
100kΩ
GND
R34UZ0010EU0100 Rev.1.00
Nov 21, 2022
ISL73847SEH
EN
VDD
LDO
600mV
I
DROOP
-
3.6mS
+
EA
-
+
+
VFB+
OSC
VREF
Figure 1. ISL73847SEHEV2Z Block Diagram
Features
▪ Power-Good LED indicator
▪ On-board transient load current generator
▪ Integrated LDO (VCC)
▪ External Clock Synchronization (SYNCI & SYNCO)
▪ Droop regulation set by a single resistor
VCC
22µF
1µF
UVLO
FLT
PWM1
PWM
PWM2
100pF
SLP
SLOPE
GEN
34.8kΩ
ISEN1+
20µA/50mV
CSA1
ISEN1-
IMON
Σ
10kΩ
ISEN2+
CSA2
ISEN2-
20µA/50mV
VCC
680Ω
Evaluation Board Manual
PVIN
638µF
VDD
0.22µH
2mΩ
Half Bridge
Driver
ISL73041SEH
30.1Ω
FLT
680pF
PVIN
22µF
FLT
VDD
0.22µH
2mΩ
Half Bridge
Driver
ISL73041SEH
30.1Ω
680pF
© 2022 Renesas Electronics
Current Feedback
Remote Voltage Feedback
VOUT
5.28mF
3.24kΩ
FPGA
LOAD
4.99kΩ
Page 1
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Related Manuals for Intersil ISL73847SEHEV2Z
Summary of Contents for Intersil ISL73847SEHEV2Z
- Page 1 20µA/50mV CSA1 0.22µH ISEN1- 2mΩ 330pF Half Bridge Driver SYNC-I VREF ISL73041SEH IMON SYNC-O 30.1Ω Σ 10kΩ ISEN2+ 100kΩ 680pF CSA2 ISEN2- 20µA/50mV 680Ω Figure 1. ISL73847SEHEV2Z Block Diagram R34UZ0010EU0100 Rev.1.00 Page 1 Nov 21, 2022 © 2022 Renesas Electronics...
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Page 2: Table Of Contents
ISL73847SEHEV2Z Evaluation Board Manual Contents Functional Description ..............3 Operating Range . -
Page 3: Functional Description
Functional Description Operating Range The ISL73847SEHEV2Z evaluation board requires two supply rails to operate properly. One for the ISL73847SEH controller analog supply input (VDD) and one for the on-board buck power supply input (PVIN). The VDD rail accepts an input voltage range of 4.5V to 19V. The PVIN should be set from 4.5V to 15V. The buck regulator circuit is preset for a 1V output voltage and a switching frequency of 500kHz with a 0.22µH output inductor and... -
Page 4: Changing The Switching Frequency
PG indication. Changing the Switching Frequency The ISL73847SEHEV2Z is configured for a 500kHz switching frequency by a JP1 connecting a 94.2kΩ pull-down resistor (R ) on the FS pin. The evaluation board includes a 0.22µH inductor and an array of output bypass capacitors for a 2.64mF output capacitance per phase, which makes up the LC filter. -
Page 5: External Clock Synchronization
ISL73847SEH datasheet. IMON The ISL73847SEHEV2Z is configured to monitor the average current though the inductor as a voltage on the IMON pin. A 10kΩ pull-down resistor (R ) is connected to this pin. TP29 test jumper is provided to monitor the IMON pin voltage. -
Page 6: 1.10 Using The On-Board Load Transient Generator
2. To monitor the pulse generator signal, use the TP37 test jumper. 3. Connect jumper to JP2 to connect VDD to power the FET driver. 4. Monitor the output voltage using TP29. Board Design Figure 4. ISL73847SEHEV2Z Evaluation Board (Top) Figure 5. ISL73847SEHEV2Z Evaluation Board (Bottom) R34UZ0010EU0100 Rev.1.00 Page 6... -
Page 7: Schematic Diagrams
ISL73847SEHEV2Z Evaluation Board Manual Schematic Diagrams UNNAMED_1_SMRES_I342_A UNNAMED_1_ISL73041SEH_I277_15 UNNAMED_1_ISL73041SEH_I199_1 UNNAMED_1_ISL73041SEH_I199_2 UNNAMED_1_JUMPER3_I378_IN3 UNNAMED_1_NCHANNEL_I347_D UNNAMED_1_SMRES_I346_A UNNAMED_1_SMRES_I345_A Figure 6. ISL73847SEHEV2Z Schematic (Page 1) R34UZ0010EU0100 Rev.1.00 Page 7 Nov 21, 2022... - Page 8 ISL73847SEHEV2Z Evaluation Board Manual Figure 7. ISL73847SEHEV2Z Schematic (Page 2) R34UZ0010EU0100 Rev.1.00 Page 8 Nov 21, 2022...
- Page 9 ISL73847SEHEV2Z Evaluation Board Manual Figure 8. ISL73847SEHEV2Z Schematic (Page 3) R34UZ0010EU0100 Rev.1.00 Page 9 Nov 21, 2022...
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Page 10: Bill Of Materials
ISL73847SEHEV2Z Evaluation Board Manual Bill of Materials Reference Designator Description Manufacturer Manufacturer Part PWB-PCB, ISL73847SEHEV2Z, REVB, Imagineering Inc ISL73847SEHEV2ZREVBPCB ROHS CAP-BOARDFLEX, SMD, C87, C88 0603, 0.1µF, 25V, 10%, Kemet C0603X104K3RACTU X7R, ROHS CAP, SMD, 0603, 0.056µF, Kemet C0603X563K5RAC7867 50V, 10%, X7R, ROHS CAP, SMD, 0805, 1.0µF,... - Page 11 ISL73847SEHEV2Z Evaluation Board Manual Reference Designator Description Manufacturer Manufacturer Part C27, C29, C31, C37, C39, C41, C43, C45, C47, C49, CAP-TANT, SMD, C51, C53, C55, C57, C59, 7.3×4.3×2.8, 220µF, 10V, Kemet T530D227M010ATE006 C63, C64, C65, C66, C67, 20%, 6mΩ, ROHS...
- Page 12 ISL73847SEHEV2Z Evaluation Board Manual Reference Designator Description Manufacturer Manufacturer Part TRANSISTOR, N- CHANNEL, 3LD, SOT-23, Diodes, Inc. 2N7002-7-F 60V, 115mA, ROHS RES-AEC-Q200, SMD, R21-R24, R27-R30, R47- 0402, 0Ω, 1/16W, TF, Vishay/Dale CRCW04020000Z0ED ROHS RES-AEC-Q200, SMD, R9, R33 0603, 680Ω, 1/10W, 1%,...
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Page 13: Board Layout
ISL73847SEHEV2Z Evaluation Board Manual Reference Designator Description Manufacturer Manufacturer Part SCREW, 4-40×1/4in, Four corners PHILLIPS, PANHEAD, Building Fasteners PMSSS 440 0025 PH STAINLESS, ROHS STANDOFF, 4-40×3/4in, Four corners F/F, HEX, ALUMINUM, 0.25 Keystone 2204 OD, ROHS HDWARE-WIRE LUG, TH, TERM1-TERM4 11.8×10.3mm, SLOTTED... - Page 14 ISL73847SEHEV2Z Evaluation Board Manual Figure 11. Layer 2 Figure 12. Layer 3 R34UZ0010EU0100 Rev.1.00 Page 14 Nov 21, 2022...
- Page 15 ISL73847SEHEV2Z Evaluation Board Manual Figure 13. Layer 4 Figure 14. Layer 5 R34UZ0010EU0100 Rev.1.00 Page 15 Nov 21, 2022...
- Page 16 ISL73847SEHEV2Z Evaluation Board Manual Figure 15. Layer 6 Figure 16. Layer 7 R34UZ0010EU0100 Rev.1.00 Page 16 Nov 21, 2022...
- Page 17 ISL73847SEHEV2Z Evaluation Board Manual Figure 17. Bottom Layer Figure 18. Silkscreen Bottom Layer R34UZ0010EU0100 Rev.1.00 Page 17 Nov 21, 2022...
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Page 18: Typical Performance Graphs
ISL73847SEHEV2Z Evaluation Board Manual Typical Performance Graphs Unless otherwise noted, V = 1V; L = 220nH per phase, C = 2.64mF per phase, C = 56nF, C = 100nF, DROOP VREF = 0Ω, R = 94.2kΩ, C = 22nF, C = 8.2nF, R... - Page 19 IMPORTANT NOTICE AND DISCLAIMER RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (“RENESAS”) PROVIDES TECHNICAL SPECIFICATIONS AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.
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