UG186: Si827x-EVB User's Guide
The Si827x isolated gate drivers are ideal for driving power switches used in a wide vari-
ety of power supply, inverter, and motor control applications, offering longer service life
and dramatically higher reliability compared to opto-coupled gate drivers. The Si827x
isolated gate drivers utilize Silicon Laboratories' proprietary silicon isolation technology
supporting up to 2.5 kV
RMS
withstand voltage per UL1577 and VDE0884. This technolo-
gy enables industry-leading common-mode transient immunity (CMTI), tight timing spec-
ifications, reduced variation with temperature and age, better part-to-part matching, and
extremely high reliability. It also offers unique features, such as separate pull-up/down
outputs, driver shutdown on UVLO fault, and precise dead time programmability. Driver
outputs can be grounded to the same or separate grounds or connected to a positive or
negative voltage. The TTL level compatible inputs with >400 mV hysteresis are available
in individual control input (Si8271/2/3/5) or PWM input (Si8274) configurations. High in-
tegration, low propagation delay, small installed size, flexibility, and cost-effectiveness
make the family ideal for a wide range of isolated MOSFET/IGBT/SiC/GaN gate drive
applications.
The Si827x evaluation board allows designers to evaluate Silicon Lab's Si827x family of
high CMTI performance ISOdrivers. The boards come populated with the Si8271 and ei-
ther the Si8273, Si8274, or Si8275 version of the family. The board includes screw ter-
minals for quick evaluation of the devices’ key parameters and also 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
The product data sheet and numerous application notes can be referenced to help facili-
tate designs.
KIT CONTENTS
• Si827x-based evaluation board (Si827x-
EVB)
• Si8271, 1-input, 4 A, 2.5 kV
RMS
Single
ISOdriver, and one of the following:
• Si8273, 2-input, 4 A, 2.5 kV
RMS
High-
Side/Low-Side ISOdriver
• Si8274, PWM-input, 4 A, 2.5 kV
RMS
High-Side/Low-Side ISOdriver
• Si8275, 2-input, 4 A, 2.5 kV
RMS
Dual
ISOdriver
silabs.com
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