SI8244CB-D-IS1R

Audio Special Purpose Overview

The SI8244CB-D-IS1R is a dual-channel isolated gate driver from the Si824x family, designed for Class D audio amplifier applications. It features two independent channels with integrated precision programmable dead-time generation to optimize Total Harmonic Distortion (THD). The device provides galvanic isolation between input and output sides using Skyworks' proprietary capacitive coupling technology. Key specifications include a peak output current of 4 A per channel, an operating supply voltage range of 6.5 V to 24 V for the driver side, and an input supply voltage of 4.5 V to 5.5 V. The isolation barrier supports up to 2500 Vrms input-to-output and 1500 Vrms output-to-output ratings. It operates within a temperature range of -40°C to +125°C.

Audio Special Purpose Feature Summary

• Dual-channel isolated gate driver with integrated dead-time generator
• Peak output current: 4 A per channel
• Programmable dead time: 0.4 ns to 1 µs for THD optimization
• Isolation rating: 2500 Vrms I-O, 1500 Vrms O-O
• High transient immunity: >45 kV/µs common mode
• TTL-compatible PWM inputs with >400 mV hysteresis
• Overlap protection to prevent shoot-through currents
• Operating temperature range: -40°C to +125°C

Audio Special Purpose Applications

• Class D digital audio amplifiers
• High-power audio systems requiring galvanic isolation
• Audio pre-amplifier stages
• Power supplies requiring isolated control signals

Audio Special Purpose Procurement Notes

Verify the specific UVLO (Undervoltage Lockout) threshold configuration required for the application, as the Si824x family offers variants with different thresholds (e.g., 8 V or 10 V). Confirm that the ordering suffix matches the desired insulation rating and packaging format (SOIC-16). Ensure compliance with humidity sensitivity handling procedures during assembly.

Audio Special Purpose Selection Notes

Select the SI8244 variant when a high peak output current of 4.0 A is necessary, distinguishing it from lower-current models like the Si8241 (0.5 A). Consider thermal derating characteristics provided in the datasheet to ensure power dissipation remains within safe limits at higher switching frequencies. Verify that the driver supply voltage (VDDA/VDDB) falls within the 6.5 V to 24 V operational range.

Audio Special Purpose Part Context

This component belongs to the Si824x isolated driver family, which combines two isolated drivers in a single package using Skyworks' proprietary semiconductor-based isolation technology. The family targets high-power audio applications by providing level translation without external circuits and enabling bipolar supply voltages up to ±750 V.

Audio Special Purpose Replacement Considerations

The SI8241BB-D-IS1R serves as a functional substitute within the same family but provides a reduced peak output current of 0.5 A compared to the 4.0 A capability of the SI8244. Ensure that the replacement part meets the current drive requirements of the target load.