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Электронные компоненты и устройства - Рынок электроники

Твердотельные реле Silicon Labs Si875x на основе КМОП

Родительская категория: Рынок Категория: Компоненты и устройства

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Компания Silicon Labs представила семейство драйверов на изолированных полевых транисторах на основе струткуры КМОП. Они предназначены для замещения  устаревших электромеханических реле и твердотельных реле на оптопаре.

В отличие от классических реле Si875x имеют низкую стоимость и простую конструкцию. В новых реле Si875x мощность передается через изоляционный КМОП барьер (подобные реле активно использует компания сузуки при производстве автоэлектроники). Таким образом, отпадает необходимость использовать вторичные источники питания.


Основные характеристики Si875x:

Стойкость к шуму, высокая надежность, среднеквадратичное напряжение изоляции 2,5 кВ

Долгий срок службы при высоких напряжениях(100 лет при 1000 В)

Эффективное переключение: 10,3 В на затворе при входном токе 1 мА

Диапазон входного напряжения от 2,25 В до 5,5 В

Вывод для настройки соотношения между потребляемой мощностью и временем переключения

Корпус SOIC-8



Элтайм.ру, по материалам Silcon Labs



Silicon Labs (NASDAQ: SLAB) has introduced a groundbreaking CMOS-based isolated field

effect transistor (FET) driver family that enables developers to use their choice of application-specific, high-volume FETs to

replace outmoded electromechanical relays (EMRs) and optocoupler-based solid-state relays (SSRs). The new Si875x family

features the industry’s first isolated FET drivers designed to transfer power across an integrated CMOS isolation barrier,

eliminating the need for isolated secondary switch-side power supplies and reducing system cost and complexity. When

paired with a discrete FET, the Si875x drivers provide a best-in-class EMR/SSR replacement solution for motor and valve

controllers, HVAC relays, battery monitoring, AC mains line and communications switches, HEV/EV automotive charging

systems, and other industrial and automotive applications.

Get all the details about Silicon Labs’ Si875x isolated FET drivers including product pricing and availability, development tools

and data sheets at .

Developers have traditionally used EMRs and optocoupler-based SSRs in switching applications, and both technologies have

limitations. EMRs are costly, slow, bulky and noisy. These drawbacks are driving double-digit growth in SSR usage, but even

SSRs pose challenges. Optocoupler-based SSRs have inherent limitations such as shorter lifetimes due to LED aging, reduced

performance and stability at higher temperatures, and reduced noise immunity. They also use a limited choice of integrated

FETs, further compromising performance, cost and power.

Silicon Labs’ CMOS-based Si875x isolated FET drivers offer a better alternative that reduces system cost and power and

enhances performance for applications served by SSRs or EMRs. Since Si875x drivers do not use LEDs or optical components,

they provide superior stability over time and temperature. The small-footprint Si875x devices offer completely silent

switching, making them an ideal replacement solution for bulky EMRs that are limited by electrical switching noise and wearout

problems, as well as mass production challenges.

The Si875x devices drive FET gates with a nominal 10.3 V using a very low 1 mA input with 1.1 ms turn-on time. Increasing the

input current to 10 mA enables an exceptionally fast turn-on time of 94 μs. A unique power optimization option delivers

maximum turn-on current for fast speed and then lowers it by up to 90 percent for static holding current once the optional

external cap is discharged. Flexible 2.25 V to 5.5 V input side voltages support seamless connection to low-power

controllers. The Si875x drivers also feature an optional Miller clamp capability to prevent unintended turn on of the external


The Si875x devices have a 2.5 kVrms isolation rating, can operate over full industrial and automotive temperature ranges (up

to +125oC), and are designed to meet stringent UL, CSA, VDE and CQC standards. Versatile inputs provide digital CMOS pin

control (Si8751 devices) or diode emulation (Si8752 devices) to best suit the target application, and flexible outputs support

ac and dc load configurations.

“With their unique combination of robust, reliable CMOS-based isolation technology and revolutionary capability to transfer

power across the isolation barrier, Silicon Labs’ Si875x drivers provide a much-needed replacement solution for antiquated

EMRs and optocoupler-based SSRs,” said Ross Sabolcik, Vice President of power products at Silicon Labs. “The new Si875x

family gives developers the flexibility to choose a cost-effective FET customized to their application needs, creating an

easy migration to state-of-the-art solid-state switching.”

Si875x Isolated FET Driver Family Highlights

Ticker: SLAB

Exchange: NASDAQ



Industry’s first CMOS isolation-based SSR solution, supporting application-specific FETs

Best-in-class noise immunity, high reliability and 2.5 kVrms isolation rating

Long lifetimes under high-voltage conditions (100 years at 1000 V)

Efficient switching: 10.3 V at the gate with only 1 mA of input current

Wide input voltage of 2.25 V to 5.5 V enables power savings

Unique pin feature optimizes power consumption/switching time trade-off

Miller clamping prevents unintended turn on of external FET

Small SOIC-8 package integrates isolation and power capacitors for low-power applications

AEC-Q100-qualified automotive-grade device options

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Компания Сансити


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