Si8281/82/83/84 Data Sheet
4.0 Amp ISODrivers with Integrated DC-DC Converters
KEY FEATURES
The Si828x family (Si8281/82/83/84) 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 applica-
tions. The Si828x 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.
• 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
In addition to the gate driver, the Si828x family integrates a dc-dc controller for simple
implementation of an isolated supply for the driver side. The Si828x 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 in-
put 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 mini-
mal passive components and a miniature transformer.
• 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
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 digi-
tal 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.
• Integrated DC-DC converter
• Feedback-controlled converter with
dithering for low EMI
• DC-DC converter efficiency of 83%
• Shutdown, frequency, and soft-start
controls
On the output side, Si828x 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 Si828x devices also integrate a Miller clamp
to facilitate a strong turn-off of the power switch.
• Industrial temp range: –40 to 125 °C
Applications
• IGBT/ MOSFET gate drives
• Industrial, HEV, and renewable energy inverters
• AC, Brushless, and DC motor controls and drives
• Variable-speed motor controllers
• Isolated switch mode and UPS power supplies
Safety Regulatory Approvals (Pending)
• UL 1577 recognized
• Up to 5000 VRMS for 1 minute
• CSA component notice 5A approval
• IEC 60950-1, 61010-1, 60601-1 (reinforced insulation)
• VDE certification conformity
• IEC 60747-5-5/VDE0884 Part 10
• CQC certification approval
• GB4943.1
silabs.com | Smart. Connected. Energy-friendly.
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Preliminary Rev. 0.5
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