4.0 Amp ISODrivers with Integrated DC-DC Converters

Manufacturer:
MFG Part #:

SI8281CC-IS

Part #:
SI8281CC-IS
Availability:
In Stock
Unit Price:$3.69
Qty:
Minumum Qty: 1
Ask a Question
Call Me
Email This Page
 
 

Product Information

Back to top
The Si8281 is made up of isolated, high-current gate drivers with integrated system safety and feedback functions. These devices are ideal for driving power MOSFETs and IGBTs used in a wide variety of inverter and motor control applications. The Si8281 isolated gate drivers utilize Silicon Labs' proprietary silicon isolation technology, supporting up to 5.0 kVrms withstand voltage per UL1577. This technology enables higher-performance, reduced variation with temperature and age, tighter part-to-part matching, and superior common-mode rejection compared to other isolated gate driver technologies.

In addition to the gate driver, the Si8281 integrates a dc-dc controller for simple implementation of an isolated supply for the driver side. The Si8281 dc-dc controller can be ordered in two different configurations depending on what system voltage rails are available and the amount of power needed. The Si8281 and Si8283 have integrated power switch but are limited in dc-dc voltage input to the device bias. The Si8282 and Si8284 utilize and external power switch and are able to accept much higher voltage input power rail. User-adjustable frequency for minimizing emissions, a soft-start function for safety, and a shut-down option are available options. The device requires only minimal passive components and a miniature transformer.

The input to the device is a complementary digital input that can be utilized in several configurations. The input side of the isolation also has several control and feedback digital signals. The controller to the device receives information about the driver side power state and fault state of the device and recovers the device from fault through an active-low reset pin.

On the output side, Si8281 devices provide separate pull-up and pull-down pins for the gate. A dedicated DSAT pin detects the desaturation condition and immediately shuts down the driver in a controlled manner. The Si8281 devices also integrate a Miller clamp to facilitate a strong turn-off of the power switch.

Symmetry Electronics is an authorized Silicon Labs distributor.
 

Features

Back to top
4 A IGBT driver
System Safety Features
DESAT detection
FAULT feedback
Undervoltage Lock Out (UVLO)
Soft shutdown on fault condition
Silicon Labs high-performance isolation technology
Industry leading noise immunity
High speed, low latency and skew
Best reliability available
30 V driver-side supply voltage
Integrated Miller clamp
Power ready pin
Complementary driver control input
Compact packages: 20 and 24-pin wide-body SOIC
Integrated DC-DC converter
Feedback-controlled converter with dithering for low EMI
DC-DC converter efficiency of 83%
Shutdown, frequency, and soft-start controls
Industrial temp range: 40 to 125C
 

Documents

Back to top

Previously Viewed Products