SI8241BB-B-IS1

Audio Special Purpose Overview

The SI8241BB-B-IS1 is a Class D audio driver featuring high-side and low-side isolated outputs in an 8-pin SOIC package. It delivers a peak output current of 0.5 A with an input supply voltage range of 4.5 V to 5.5 V. The device incorporates a programmable dead-time generator (0.4 ns to 1 µs) for precise control, TTL-compatible PWM inputs with >400 mV hysteresis, and UVLO options at 8 V or 10 V. It provides up to 2500 Vrms input-to-output isolation and operates within a temperature range of -40°C to +125°C.

Audio Special Purpose Feature Summary

• High-precision linear programmable dead-time generator (0.4 ns to 1 µs)
• TTL level compatible PWM input with >400 mV hysteresis
• Up to 2500 Vrms input-to-output isolation
• 0.5 A peak output current capability

Audio Special Purpose Applications

• Class D audio amplifiers
• Pre-amplifier circuits

Audio Special Purpose Procurement Notes

Verify the specific UVLO threshold configuration required for the application, as the family offers 8 V or 10 V options. Confirm that the 0.5 A peak output current meets the load requirements compared to the 4.0 A Si8244 variant. Ensure the ordering suffix matches the desired isolation rating and package type.

Audio Special Purpose Selection Notes

Select this component for high-power (>30 W) audio applications requiring integrated isolation and dead-time generation. The 0.5 A peak drive is suitable for driving external MOSFETs in Class D topologies. Consider the 8 V or 10 V UVLO threshold based on the gate driver supply voltage stability.

Audio Special Purpose Part Context

This part belongs to the Si824x isolated driver family from Skyworks Solutions. The family includes the Si8241 (0.5 A) and Si8244 (4.0 A) variants, both designed for high-power audio applications with integrated isolation barriers and precision timing controls.

Audio Special Purpose Replacement Considerations

Direct replacement within the same family includes the SI8244BB-B-IS1 for higher current requirements. Verify compatibility if substituting with other Si824x variants due to differences in peak output current and internal parasitic capacitance.