Renesas ISL81802EVAL3Z User Manual
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Renesas ISL81802EVAL3Z User Manual

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ISL81802EVAL3Z
Evaluation Board
The ISL81802EVAL3Z 4-phase evaluation board (shown in
dual synchronous buck controller that offers external soft-start, independent enable functions, and integrates
UV/OV/OC/OT protection. A programmable switching frequency ranging from 100kHz to 1MHz helps optimize
inductor size while the strong gate driver delivers up to 40A for the buck output.
Key Features
• Wide input range: 18V to 80V
• High light-load efficiency in pulse skipping DEM operation
• Programmable soft-start
• Optional DEM/PWM operation
• Optional CC/HICCUP OCP protection
• Supports pre-bias output with soft-start
• PGOOD indicator
• OVP, OTP, and UVP protection
• Back biased from output to improve efficiency
The ISL81802EVAL3Z 4-phase evaluation board is designed for high current applications. The current rating of
the ISL81802EVAL3Z is limited by the FETs and inductor selected. The ISL81802EVAL3Z electrical ratings are
shown in
Table
1.
Table 1.
Electrical Rating
Parameter
Input Voltage
Switching Frequency
Output Voltage
Output Current
OCP Set Point
Ordering Information
Part Number
ISL81802EVAL3Z
Related Literature
For a full list of related documents, visit our website:
•
ISL81802
device page
R16UH0004EU0100 Rev.1.00
Sep.15.20
18V to 80V
200kHz
12V
40A
Minimum 44A at ambient room temperature
High Voltage Dual Buck Controller Evaluation Board
Figure
4) features the ISL81802, a 80V high-voltage
Rating
Description
User Manual
Page 1 of 19

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Summary of Contents for Renesas ISL81802EVAL3Z

  • Page 1 • OVP, OTP, and UVP protection • Back biased from output to improve efficiency The ISL81802EVAL3Z 4-phase evaluation board is designed for high current applications. The current rating of the ISL81802EVAL3Z is limited by the FETs and inductor selected. The ISL81802EVAL3Z electrical ratings are...
  • Page 2 ISL81802EVAL3Z Figure 1. ISL81802EVAL3Z Block Diagram R16UH0004EU0100 Rev.1.00 Page 2 of 19 Sep.15.20...

  • Page 3: Functional Description

    1. Functional Description Functional Description The ISL81802EVAL3Z is the same test board used by Renesas application engineers and IC designers to evaluate the performance of the ISL81802 HTSSOP IC. The board provides an easy and complete evaluation of all the IC and board functions.
  • Page 4 ISL81802EVAL3Z 1. Functional Description Figure 2. Proper Test Setup 2. Turn on the power supply. 3. Adjust the input voltage (V ) within the specified range and observe the output voltage. The output voltage variation should be within 3%. 4. Adjust the load current within the specified range and observe the output voltage. The output voltage variation should be within 3%.

  • Page 5: Pcb Layout Guidelines

    MOSFETs. 2. If signal components and the IC are placed separately from the power train, Renesas recommends using full ground planes in the internal layers with shared SGND and PGND to simplify the layout design. Otherwise, use separate ground planes for the power ground and the small signal ground.
  • Page 6 ISL81802EVAL3Z 2. PCB Layout Guidelines ISL81802EVAL3Z Evaluation Board Figure 4. ISL81802EVAL3Z Evaluation Board, Top View R16UH0004EU0100 Rev.1.00 Page 6 of 19 Sep.15.20...
  • Page 7 ISL81802EVAL3Z 2. PCB Layout Guidelines Figure 5. ISL81802EVAL3Z Evaluation Board, Bottom View R16UH0004EU0100 Rev.1.00 Page 7 of 19 Sep.15.20...
  • Page 8 ISL81802EVAL3Z Circuit Schematics Figure 6. Schematic (1/3)
  • Page 9 BLK1 BLK1 Figure 7. Schematic (2/3)
  • Page 10 BLK2 BLK2 Figure 8. Schematic (3/3)
  • Page 11 ISL81802EVAL3Z 2. PCB Layout Guidelines Bill of Materials Reference Designator Description Manufacturer Manufacturer Part PWB-PCB, ISL81802EVAL3Z, REVB, ROHS Multilayer PCB ISL81802EVAL3ZREVBPCB Technology C1, C2, C65, C70 CAP, RADIAL, 12.5x26.5, 220μF, 100V, 20%, United Chemi-Con EKZN101ELL221MK25S ALUM.ELEC., 5mm, ROHS C3, C4, C5, C6, C42, C43, C44, CAP-AEC-Q200, SMD, 1210, 4.7μF, 100V,...
  • Page 12 ISL81802EVAL3Z 2. PCB Layout Guidelines Reference Designator Description Manufacturer Manufacturer Part Q2, Q3, Q5, Q7, Q9, Q13, Q15, DO NOT POPULATE OR PURCHASE R1, R58 RES SMD 430kΩ 1% 1/4W 1206 Panasonic ERJ-8ENF4303V R2, R91 RES SMD 487kΩ 1% 1/10W 0603...

  • Page 13: Board Layout

    ISL81802EVAL3Z 2. PCB Layout Guidelines Board Layout Figure 9. Silkscreen Top Figure 10. Top Layer R16UH0004EU0100 Rev.1.00 Page 13 of 19 Sep.15.20...
  • Page 14 ISL81802EVAL3Z 2. PCB Layout Guidelines Figure 11. Second Layer (Solid Ground) Figure 12. Third Layer R16UH0004EU0100 Rev.1.00 Page 14 of 19 Sep.15.20...
  • Page 15 ISL81802EVAL3Z 2. PCB Layout Guidelines Figure 13. Bottom Layer Figure 14. Silkscreen Bottom R16UH0004EU0100 Rev.1.00 Page 15 of 19 Sep.15.20...

  • Page 16: Typical Performance Curves

    ISL81802EVAL3Z 3. Typical Performance Curves Typical Performance Curves = 48V, T = 25°C, unless otherwise noted. I_L1 I_L2 I_L3 I_L4 200mV/Div 4µs/Div Total Load Current (A) Figure 15. Load Current Sharing, V = 48V, CCM Figure 16. Output Voltage Ripple, V...
  • Page 17 ISL81802EVAL3Z 3. Typical Performance Curves = 48V, T = 25°C, unless otherwise noted. (Continued) 500mV/Div 500mV/Div 10A/Div 10A/Div 10A/Div 10A/Div 10A/Div 10A/Div 2ms/Div 2ms/Div Figure 21. Load Transient, V = 48V, I = 0A to 40A, Figure 22. Load Transient, V...
  • Page 18 ISL81802EVAL3Z 3. Typical Performance Curves = 48V, T = 25°C, unless otherwise noted. (Continued) Phase1 50V/Div Phase1 50V/Div Phase2 50V/Div Phase2 50V/Div Phase3 50V/Div Phase3 50V/Div Phase4 50V/Div Phase4 50V/Div 2µs/Div 2µs/Div Figure 27. Phase1, Phase2, Phase3, Phase4, V = 48V, Figure 28.

  • Page 19: Revision History

    ISL81802EVAL3Z 4. Revision History Revision History Rev. Date Description 1.00 Sep.15.20 Initial release R16UH0004EU0100 Rev.1.00 Page 19 of 19 Sep.15.20...
  • Page 20 Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products.

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