Product Summary

Si828x is SKYWORKS' 1ch isolated gate driver lineup.

It has built-in functions effective for driving power devices such as IGBT and SiC.

Other than the Si8286, it has a Miller clamp to detect abnormal operations such as short-circuit events, a DESAT and soft shutdown function that can quickly turn off the transistor, and a FAULT feedback that notifies the system of an abnormality.

There are Si8281/82/83/84 with an isolated DCDC converter that can be driven using an external transformer, and Si8285/6 without DCDC, and both drivers can be used to drive motors with a minimum number of components.

Effective in highly efficient drive systems with high CMTI (Common mode transient immunity).

Product features

• High drive side power supply voltage 30V
• High drive current capability ~4A Adjustable to 20A, etc. using external components [Click to link to materials on peripheral circuit design]
• Various UVLO voltages 3 to 15V (Lineup of 13 and 15V that can also be used for SiC)
• Various functions such as Miller Clamp circuit IGBT/SiC compatible DeSat detection/Soft Shutdown (<1us high-speed short protection)
• Fault feedback function (reset by open-drain FLTb pin RSTb) to inform system of abnormal condition
• About 80% high efficiency DCDC converter built-in products (si8281, 82, 83, 84)
• Thermal protection function
• High CMTI 125kV/us (min)

Each lineup

Annotation;
VMID: With VMID pin (product capable of negative voltage drive)
ShutDwn Soft St: Built-in DCDC converter shutdown function and Soft Start function
Frq: DCDC converter frequency fixed product, variable product (FIX or Variable)
Ex SW: Input/output can be set from 7 to 24V with an external SW transistor, "-" is up to 5V
TH P: Built-in thermal protection circuit
Si8286 is pin compatible with HCPL-316J

Achieves DESAT and Soft Shutdown <<1us

In driving IGBTs and SiCs, it is necessary to have functions such as detecting abnormal current flowing into the power element and safely turning it off. Protection operation must be performed at a speed of about 1us. The Si828x has a fast response from the detection of DESAT, so it can handle the high speed of 1u sec required for SiC.
The figure shows an example using an external circuit.
In addition, CMTI is also a high product, so it is possible to create a more efficient system.

It also has an open-drain output FAULT signal terminal that notifies the controller of abnormal conditions, including the temperature of the driver IC.
For wake-up use the RSTb pin. For detailed specifications, please refer to data sheets Si8281/82/83/84, SI8285/86.

Application note AN1288: Si828x External Enhancement Circuits introduces high-speed protection circuits and operations using external components.

The above datasheets and application notes are summarized in the various technical information related to this product in the article.

Built-in high-efficiency DCDC controller

With 5V power input type Si8281, Si8283.
The lineup includes Si8282 and Si8284, which can input and output voltages up to 24V by using an external transistor.

There is a lineup with functions such as fixed/variable frequency pulse skip mode, and the efficiency is about 83%.

Target application

• Gate drivers for SiC/IGBT/MOSFET, etc.
• Inverters for industrial machinery and renewable energy
• In-vehicle traction inverter
• motor control
• DC DC converter
• ON Board Charger

Various technical information about this product

The following information is useful for reference in the development of the Si828x.
If you have any questions, please contact our representative from "Contact Us".

Evaluation Board

・si828x-hb-evb　

A multi-functional half-bridge evaluation board for driving SiC and IGBTs.
The high side is driven by Si8285 and the low side by Si8284 with DCDC, and there is also a report using Wolfspeed's SiC module, which is very useful as a reference for actual circuits.

AN1362: Si828x XM3 Gate Driver Test Report　
This is an evaluation report with a Wolfspeed XM3 SiC FET module connected.

User Guide: US-484:Si828x=HB-EVB User's Guide

・si8284v2-kit　

          Si8284 Isolated Gate Driver Evaluation Kit

Si8284 evaluation board with DCDC converter drive circuit. Works with 24V input.

         UG482: Si8284v2-EVB User's Guide
         UG484: Si828x-HB-EVB User's Guide

・si8285_86-kit　

         Si8285/86 Isolated Gate Driver Evaluation Kit

Evaluate the capabilities of the Si8285 and Si8286 isolated SiC/IGBT drivers.

        UG517: Si8285_86v2-EVB User's Guide  

　

　

　

Wolfspeed Partner Design Site
This site summarizes the results of testing and optimization using Wolfspeed's SiC MOSFETs and modules and SKYWORKS evaluation boards.

Inquiry / Quotation

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