SI8244BB-C-IS1

Audio Special Purpose Overview

The SI8244BB-C-IS1 is a Class D audio gate driver featuring high-side and low-side isolated outputs with a 4.0 A peak output current. It operates on a 4.5 V to 5.5 V input supply and supports driver supplies up to 24 V. The device integrates a precision programmable dead-time generator (0.4 ns to 1 µs) and overlap protection to prevent shoot-through currents. It provides 2500 Vrms input-to-output isolation, ensuring robust performance in high-power audio applications.

Audio Special Purpose Feature Summary

• 4.0 A peak output current capability for high-power Class D amplifiers
• Integrated linear programmable dead-time generator (0.4 ns to 1 µs)
• High-voltage isolation: 2500 Vrms input-to-output
• TTL-compatible PWM input with >400 mV hysteresis

Audio Special Purpose Applications

• Class D digital audio drivers
• High-power (>30 W) audio amplifier systems
• Pre-amplifier line driver circuits

Audio Special Purpose Procurement Notes

Verify the specific UVLO threshold configuration required for the application, as the Si8244 family offers both 8 V and 10 V undervoltage lockout options. Confirm that the ordering suffix corresponds to the desired isolation rating and package variant. Ensure compatibility with the system's PWM input logic levels before finalizing procurement.

Audio Special Purpose Selection Notes

Select the SI8244 over the SI8241 when higher drive strength (4.0 A vs. 0.5 A) is needed for larger gate capacitances or lower impedance loads. Consider the 8 V or 10 V UVLO option based on the main power supply rail voltage of the target amplifier stage. The integrated dead-time control simplifies design by reducing external component count compared to non-integrated solutions.

Audio Special Purpose Part Context

This component belongs to the Si824x family of isolated drivers from Skyworks Solutions. The family includes the Si8241 (0.5 A) and Si8244 (4.0 A) variants, both designed for high-power audio applications. They share similar isolation technologies and functional blocks but differ primarily in output drive capability and associated thermal characteristics.