UG367: Si823Hx-EVB User's Guide

The Si823Hx isolated gate drivers are ideal for driving power switches used in a wide

variety of power supply, inverter, and motor control applications, offering longer service

life and dramatically higher reliability compared to opto-coupled gate drivers. The

Si823Hx isolated gate drivers utilize Silicon Laboratories' proprietary silicon isolation

technology supporting up to 5 kVRMS withstand voltage per UL1577 and VDE0884.

This technology enables industry-leading common-mode transient immunity (CMTI),

tight timing specifications, reduced variation with temperature and age, better part-to-

part matching, and extremely high reliability. It also offers unique features, such as sep-

arate pull-up/down outputs, driver shutdown on UVLO fault, and precise dead time pro-

grammability. Driver outputs can be grounded to the same or separate grounds or con-

nected to a positive or negative voltage. The TTL level compatible inputs with 800 mV

hysteresis are available in individual control input (Si823H1/2/3/5/6/7 and Si82520) or

PWM input (Si823H4/8) configurations. High integration, low propagation delay, small in-

stalled size, flexibility, and cost-effectiveness make the family ideal for a wide range of

isolated MOSFET/IGBT/SiC/GaN gate drive applications.

The Si823Hx evaluation board allows designers to evaluate Silicon Lab's Si823Hx family

of high CMTI performance ISOdrivers. The boards come populated with either the

Si823H2, Si82520, or two Si823H9 version of the family. The board includes screw ter-

minals for quick evaluation of the devices’ key parameters and includes test points on

each devices’ pins to accommodate direct connection to the designer’s end system. 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.

KIT CONTENTS

• Si823Hx-based evaluation board

(Si823Hx-EVB) populated in one of the

following configurations:

•

1 - Si823H2, 2-input, 4 A, 5 kVrms High-

Side/Low-Side ISOdriver

• 1 - Si82520, 2-input, High Input Voltage,

4 A, 5 kVrms High-Side/Low-Side

ISOdriver

• 2 - Si823H9 1-input, 4 A, 5 kVrms Single

Channel ISOdrivers

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1. Required Equipment

The following equipment is required to demonstrate the evaluation board:

•

One signal generator

• One dual dc power supply: 0–5 V and 0–15 V (or two single supplies)

• 1 oscilloscope (at least two channels)

• Assorted cables, leads and probes as necessary to connect equipment to EVB

• Si823Hx evaluation board (board under test)

• Si823Hx evaluation board user’s guide (this document)

1.1 DC Supply Configuration

1. Set one supply to output 5 VDC.

2. Turn OFF the supply and connect the positive lead to VDDI (J1 pin1 or TP1).

3. Connect the negative lead to GNDI (J3 or TP3).

4. Turn ON the dc power supply.

5. Ensure that LED D1 turns on.

6. Ensure that the current draw is less than 25 mA. If it is larger, this indicates that either the board or Si823Hx has been damaged or

the supply is connected backwards.

7. Set the other supply to output 15 VDC.

8. Turn OFF the supply and connect the positive lead to VDDA (J2 or TP2).

9. Connect the negative lead to GNDA (J4 or TP4).

10. Turn ON the supply.

11. Ensure that LED D2 turns on.

12. Ensure that the current draw is less than 100 mA. If it is larger, this indicates that either the board or Si823Hx has been damaged

or the supply is connected backwards.

1.2 Function Generator

1. Turn ON the function generator with the output disabled.

2. Adjust its output to provide a 500 kHz, 0 to 5 V peak square wave (50 percent duty cycle) to its output.

3. Connect the output of the generator to VIA (TP5, ground on TP6).

4. Ensure a shunt is placed on TP3 between pins 2 and 3 (connects VIB to GND).

a. If the board being tested is Si823H2 or Si823H9, ensure a shunt is placed on JP4 between pins 1 and 2 to enable the device.

b. If the board being tested is an Si82520, ensure that the shunt on JP4 is between pins 2 and 3 to enable the device.

5. Enable the output of the waveform generator.

UG367: Si823Hx-EVB User's Guide

Required Equipment

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