SI8241CB-B-IS1R

Audio Special Purpose Overview

The SI8241CB-B-IS1R is a dual high-side and low-side isolated gate driver from Skyworks Solutions, designed for Class D audio amplifier applications. It features an integrated precision dead-time generator to optimize Total Harmonic Distortion (THD). The device operates on a single 4.5 V to 5.5 V input supply and provides up to 2500 Vrms isolation between the input and output channels. Key specifications include a peak output current of 3.6 mA, a propagation delay of 60 ns maximum, and operation across an industrial temperature range of -40°C to +125°C.

Audio Special Purpose Feature Summary

• Dual High-Side and Low-Side Isolated Gate Driver
• Integrated Linear Programmable Dead-Time Generator (0.4 ns to 1 µs)
• Up to 2500 Vrms Input-to-Output Isolation Voltage
• High Latchup Immunity Exceeding 100 V/ns
• TTL-Compatible PWM Input with >400 mV Hysteresis
• Peak Output Current: 3.6 mA
• Propagation Delay: 60 ns Max

Audio Special Purpose Applications

• Class D digital audio amplifiers
• High-power audio systems
• Automotive audio drivers

Audio Special Purpose Procurement Notes

Verify the specific UVLO threshold configuration required for the application, as the Si8241 family offers both 8 V and 10 V options. Confirm that the 'B' suffix in the part number corresponds to the correct insulation rating and package variant specified in the manufacturer's ordering guide before finalizing procurement.

Audio Special Purpose Selection Notes

Select this component for designs requiring precise dead-time control to minimize crossover distortion in Class D amplifiers. Ensure the load capacitance and switching frequency remain within the thermal limits defined by the junction-to-air thermal resistance. Verify that the isolated supply voltages do not exceed the absolute maximum ratings.

Audio Special Purpose Part Context

This part belongs to the Si824x family of isolated gate drivers from Skyworks Solutions. The family includes variants with different peak output currents, such as the higher-current Si8244. All devices in this series share the same narrow body SOIC-16 package and core capacitive coupling isolation technology, differing primarily in drive strength and specific electrical thresholds.