Silicon Laboratories Si82 Series, Si8220, Si8234, Si8235, Si8233 User Manual

Si82xx-EVB UG

Si82XX EVALUATION BOARD USER’S GUIDE

1. Introduction

The Si823x isolated driver family combines two independent isolated drivers into a single package. The Si8230/1/
3/4 are high-side/low-side drivers, and the Si8232/5/6 are dual drivers. Versions with peak output currents of 0.5 A
(Si8230/1/2) and 4.0 A (Si8233/4/5/6) are available. The Si8220/21 is a high-performance functional upgrade for
opto-coupled drivers, such as the HCPL-3120 and the HPCL-0302 providing 2.5 A of peak output current. These
ISOdrivers utilize Silicon Laboratories' proprietary silicon isolation technology, which provides a choice of 2.5, 3.75,
or 5.0 kVrms withstand voltages. All drivers operate with a maximum output supply voltage of 24 V. High
integration, low propagation delay, small installed size, flexibility, and cost-effectiveness make the family ideal for a
wide range of isolated MOSFET/IGBT gate drive applications.

The Si82xx evaluation board allows designers to evaluate Silicon Lab's family of ISOdrivers. The boards come
populated with 5 kVrms versions of the Si8220, Si8233, Si8234, and Si8235. The board includes land pads for
common surface mount and through-hole packaged FET/IGBT power transistors. The board also includes patch
area for additional prototyping that can be used to accommodate any load configuration a designer might need to
evaluate. For more ISOdriver information, visit Silicon Labs web site at www.silabs.com/isolation. The product data
sheet and numerous application notes can be referenced to help facilitate designs.

Rev. 0.1 6/11 Copyright © 2011 by Silicon Laboratories Si82xx-EVB UG

Si82xx-EVB UG

2. Kit Contents

The Si82xx Evaluation Kit contains the following items:

 Si82xx-based evaluation board (Si82xx-EVB) shown in Figure 1.
 Si8220, Opto-input, 2.5 A, 5 kV ISOdriver
 Si8233, 2-input, 4 A, 5 kV, High-Side/Low-Side ISOdriver
 Si8234, PWM-input, 4 A, 5 kV High-Side/Low-Side ISOdriver
 Si8235, 2-input, 4 A, 5 kV Dual ISOdriver

Figure 1. Si82xx Evaluation Board Overview

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3. Si82xx ISOdriver Board Overview

The Si82xx evaluation board is populated with the following ISOdrivers:

 Si8220 in wide-body SOIC-16 package, opto-input, 2.5 A, 5 kV ISOdriver
 Si8233 in wide-body SOIC-16 package, 2-input, 4 A, 5 kV High-Side/Low-Side ISOdriver
 Si8234 in wide-body SOIC-16 package, PWM-input, 4 A, 5 kV High-Side/Low-Side ISOdriver
 Si8235 in wide-body SOIC-16 package, 2-input, 4 A, 5 kV Dual ISOdriver
 High-side and low-side land pads for surface mount packaged FET/IGBT power transistors (not populated)
 High-side and low-side land pads for through-hole packaged FET/IGBT power transistors (not populated)
 Patch area

The Si82xx board is four separate evaluation boards in one, with each section featuring a different ISOdriver
(Si8220, Si8233, Si8234, or Si8235). Each section is isolated from the other sections and requires its own power
supplies to power the given section's ISOdriver. Each section's ISOdriver is designed to be powered separately
with input supplies for VDDI (5.5 V, 500 mA) and output supplies for VDDA, VDDB, or VDD up to 24 V. The user is
expected to connect their desired drive-trane topology and load to the outputs of the appropriate ISOdriver and the
patch area. Figure 2 shows a silkscreen overview of the board.

Please note the voltage rating for the prepopulated components in the Si82xx BOM section of this document before
applying power to the ISOdriver and customer specific driver-trane. Applying a voltage to a component that is
higher than its rating can cause permanent device damage. If the install components do not meet the user's
requirements, these components need to be replaced before proceeding. Moreover, if a user wants to evaluate an
ISOdriver in a wide-body package other than the ones populated, this can be accomplished by removing the
footprint-compatible device installed on the evaluation board and replacing it with the desired footprint-compatible
ISOdriver.

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Figure 2. Si82xx Evaluation Board Silkscreen

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3.1. Si82xx ISOdriver Board Test

Figure 3 illustrates the Si8234 with VDDI powered from 5 V and VDDA and VDDB powered from 15 V. A 10 kHz
signal is applied to the Si8234's PWM input. As shown, the Si8234 transmits a 10 kHz signal to VOA and VOB
(Channel 3 illustrates VOA output, and Channel 2 illustrates VOB output). Note that VOA and VOB are 180° out of
phase, as would be expected of a PWM driver. In this setup, no drive-trane was connected to the outputs (VOA and
VOB) of the Si8234. Nevertheless, the potentiometer, R35, can be adjusted to dynamically change the dead-time
of the Si8234 if desired. Duplicating this setup is an excellent test to become familiar with the evaluation board. To
repeat this test, perform the following steps:

1. Install a shunting jumper to J12 (Position 1, 2).

2. Install a shunting jumper to J14.

3. Install a shunting jumper to J11.

4. Install a shunting jumper to J13.

5. Connect a 5 Vp-p square wave to P7.

6. Connect a 5 V (100 mA) supply to P9.

7. Connect a 15 V (100 mA) supply to P14.

8. Connect a 15 V (100 mA) supply to P15.

9. Connect a scope probe to TP9 to view VOA.

10.Connect a scope probe to TP11 to view VOB.

Figure 3. Si8234 PWM Outputs

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4. Si82xx Evaluation Board Schematics

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Figure 4. Si82xx Evaluation Board Schematic (1 of 4)