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Silicon Laboratories Si8281-EVB User Manual
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Silicon Laboratories Si8281-EVB User Manual

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UG167: Si8281-EVB User's Guide
This document describes the operation of the Si8281-EVB.
The Si8281 Evaluation Kit contains the following items:
• Si8281-EVB
• Si8281CD-IS installed on the evaluation board.
silabs.com | Smart. Connected. Energy-friendly.
KEY POINTS
• Discusses hardware overview and setup,
including:
• Si8281 low voltage side connections.
• DC-DC operation.
• Si8281 isolated gate drive connections.
• Offers alternative configurations.
• Demonstrates driver functionality.
• Shows Si8281-EVB schematics and
silkscreen/copper layout.
• Includes the bill of materials and ordering
guide.
Rev. 0.1

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Summary of Contents for Silicon Laboratories Si8281-EVB

  • Page 1 UG167: Si8281-EVB User's Guide This document describes the operation of the Si8281-EVB. KEY POINTS The Si8281 Evaluation Kit contains the following items: • Discusses hardware overview and setup, • Si8281-EVB including: • Si8281 low voltage side connections. • Si8281CD-IS installed on the evaluation board.

  • Page 2: Overview And Setup

    1. Overview and Setup 1.1 Hardware Si8281-EVB can be used to demonstrate the isolated gate drive capabilities of the installed Si8281CD-IS. The Si8281 includes a DC- DC converter used to supply isolated power to the gate driver. Si8281 Low Voltage Side Connections Supply power to the input side of Si8281 by applying 5.0 V...
  • Page 3 UG167: Si8281-EVB User's Guide Overview and Setup 1.2 Alternative Configurations Positive Voltage Gate Drive Only The standard configuration for the gate driver to apply positive voltage, VDDB–VMID, to the gate during the high drive portion of the PWM cycle and negative voltage, VSSB–VMID, during the low drive portion of the PWM cycle. Alternatively, if only positive drive volt- age is desired, remove R13 and install a 0 Ω...
  • Page 4 VPWR INPUT VDDB VDDB VMID VDDB TP14 VMID VMID OUTPUT VMID VDDB GNDA VMID VSSB GNDA GNDA GNDA VSSB VMID VSSB GNDA VSSB BUMPER BUMPER Figure 2.1. Si8281-EVB Top Level Schematic silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 3...
  • Page 5 UG167: Si8281-EVB User's Guide Schematics VPWR 1. DC/DC is built to drive to create +15/-11V. 2. To operate with positive voltage gate drive only: VPWR a. Remove R13 VDDB b. Install R14 = 0 Ohm VDDB c. Change divider VDDB-VSSB = (R1/R2 +1) x 1.05V...
  • Page 6 UG167: Si8281-EVB User's Guide Layout 3. Layout Figure 3.1. Si8281-EVB Top Silkscreen Figure 3.2. Si8281-EVB Top Copper silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 5...
  • Page 7 UG167: Si8281-EVB User's Guide Layout Figure 3.3. Si8281-EVB Bottom Silkscreen Figure 3.4. Si8281-EVB Bottom Copper silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 6...

  • Page 8: Bill Of Materials

    UG167: Si8281-EVB User's Guide Bill of Materials 4. Bill of Materials Table 4.1. Si8281-EVB Bill of Materials Part Reference Description Manufacturer Manufacturer Part Number C1, C3, C5, C7, C12, CAP, 10 μF, 50 V, ±20%, X7R, 1210 Venkel C1210X7R500-106M C14, C18 CAP, 100 pF, 50 V, ±20%, C0G, 0603...
  • Page 9 UG167: Si8281-EVB User's Guide Bill of Materials Part Reference Description Manufacturer Manufacturer Part Number TP8, TP9, TP10, TESTPOINT, WHITE, PTH Kobiconn 151-201-RC TP13 IC, 4 AMP ISODRIVER WITH DC-DC, SO20 WB Silicon Labs Si8281CD-IS silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 8...

  • Page 10: Ordering Guide

    UG167: Si8281-EVB User's Guide Ordering Guide 5. Ordering Guide Table 5.1. Si8281-EVB Ordering Guide Ordering Part Number (OPN) Description Si8281-KIT Si8281 Isolated gate driver evaluation board kit. silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 9...
  • Page 11 Trademark Information Silicon Laboratories Inc.® , Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clockbuilder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, ISOmodem®, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress®...