Product Summary

Si827x is SKYWORKS' lineup of high CMTI performance isolated gate drivers.
When increasing system efficiency by increasing switching speed using high-speed devices such as GaN and SiC, high CMTI characteristics that do not malfunction due to sudden fluctuations in common mode voltage are essential characteristics. The Si827x offers industry-leading noise immunity (200KV/us) and latch-up resistance (400KV/us).

Product features

• High drive current capability ~4A
• Supports ultra-high-speed switching with industry-leading CMTI (200 kV/μs) and latch-up resistance (400 kV/μs)
• Operates with input side power supply voltage of 2.5V to 5.5V. Low voltage operation enables low power consumption Output side is 4.2~30V
• Delay Time is as low as 30ns (typ), 45ns (typ) even with the diglitch filter option
• High-precision timing control, including DT (dead time control), maximizes system efficiency and safety
• Using the EN pin instead of the DIS pin provides a safe default state
• Wide range of 3, 5, 8, 12V and UVLO voltages available
• 8pin SOIC(1ch), 16pin SOIC, DFN-14 and small package lineup

Target application

• Power supply for servers, computers, etc.
• Base station, solar power inverter
• Microinverters, Class D amplifiers, motor controllers
• Power supply for charging equipment for electric vehicles/hybrid electric vehicles (EV/HEV)

VIA VIB drive Si8273 application circuit example

For driving motors, etc.

PWM drive Si8274 application circuit example

For circuits such as power supplies

Abundant reference design with GaN manufacturers

We collaborate with GaN manufacturers to create and evaluate reference designs using actual GaN devices for many models, speeding up their introduction to the market.

For more information, please refer to the following Skyworks web pages that have links to information on each evaluation kit.

⇒Click here　

Product lineup

Suffix and device optional features

Dead time function

For PWM control type models such as Si8274, DT (Dead Time) can be set with a single resistor.

Drivers other than the Dual type have overlap protection to prevent VOA and VOB from turning on at the same time.
In addition to this, DT is a function that takes into account the delay time of the power transistor and turns off the output for a certain period of time so that the upper and lower outputs do not turn on at the same time.

diglitch filter

An optional model has a built-in glitch removal circuit. Noise below a typical 15 ns is ignored and does not pass through the IC.

Evaluation Board

Easily evaluate the Si827x family with the Si8273 evaluation board.
The board includes screw terminals for quick evaluation of key parameters and also provides test points for direct connection to the designer's system.


UG186: Si827x-EVB User's Guide　　

In actual layout, it is most important to place power devices and drivers as close as possible to minimize ringing in the drive path and noise on the VDD line. Also, be careful to keep parasitism to a minimum. (See datasheet)

Related Documents

Datasheet

　　Si827x Datasheet　

Application Note

　　AN486 High-Side Bootstrap Design Using ISODrivers in Power Delivery Systems​

User Guide 

          UG186: Si827x-EVB User's Guide  

white paper

           Enhancing Power Delivery System Designs with CMOS-Based Isolated Gate Drivers  

            Pin-Compatible Digital Isolated Gate Drivers Make Life Easy for Power Designers   

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