SI8244BB-D-IS1

Audio Special Purpose Overview

The SI8244BB-D-IS1 is a high-voltage, isolated Class D audio gate driver from Skyworks Solutions. It integrates two isolated channels (high-side and low-side) with a precision programmable dead-time generator to prevent shoot-through currents in power MOSFETs or IGBTs. The device features digital isolation with a 2.5 kVrms rating and operates on a single 5 V supply for the input side, while driving external power stages with peak output currents up to 3.6 A. It supports PWM inputs with TTL/CMOS compatibility and functions within an industrial temperature range of -40°C to +125°C.

Audio Special Purpose Feature Summary

• Integrated isolated high-side and low-side drivers
• Precision linear programmable dead-time generator (adjustable from 0.4 ns to 1 µs)
• High peak output current capability (up to 3.6 A)
• 2.5 kVrms isolation rating
• TTL/CMOS compatible PWM input with hysteresis
• Single 5 V supply operation for control side

Audio Special Purpose Applications

• Class D audio amplifiers
• Industrial motor drives
• Inverter systems requiring precise dead-time control

Audio Special Purpose Procurement Notes

This component is available in a 16-lead SOIC package. Verify stock levels as availability may vary. Ensure that the PCB layout accounts for the required creepage and clearance distances corresponding to the 2.5 kV isolation barrier.

Audio Special Purpose Selection Notes

Select the SI8244 over lower-current variants (such as the SI8241) when higher peak drive current (>1 A) is required to switch large power MOSFETs or IGBTs efficiently. The 'BB' suffix indicates specific UVLO thresholds; verify this matches your bootstrap circuit design compared to other suffixes like 'BC'.

Audio Special Purpose Part Context

The SI8244 is part of the Si824x family of isolated gate drivers designed specifically for Class D audio and power applications where precise timing and isolation are critical. Unlike standard logic isolators, it includes integrated dead-time generation to simplify the design of half-bridge configurations.