Si824x Class D Audio Drivers​

The Si8241/44 Audio Gate Drivers facilitate high fidelity, class D amplification with many advantages over competing gate drivers. These drivers offer the benefits of precise dead time adjustment for the best balance of low total harmonic distortion (THD) and high system efficiency. The individually isolated drivers facilitate simpler system topologies, external component flexibility, and high functional integration for small installed size and competitive cost.

Listen to the sound quality performance of the Si824x audio driver over the audible spectrum using the Class D Sound Quality Demonstration.

In general, Class D amplifier implementation can be difficult due to input level shifting requirements. Most available Class D drivers lack the capability to eliminate level shifting and those drivers that do, have other unwanted peculiarities. In contrast, the Si824x internal isolation provides the level shift function internally and transparent to the user. Only a single TTL PWM input signal is required to drive a two-state class D amplifier. The combined benefits of low THD, high operating efficiency, integrated level shifting, and a simplified system architecture makes the Si824x the best Class D Audio driver available. 

 

Features

  • Precision programmable dead time
  • Input/output isolation for intrinsic level shifting
  • High (up to 1.5 kV) driver-to-driver switching voltages for high bus voltage and output power
  • 0.5 A and 4 A output current options
  • Switching speeds up to 8 MHz
  • No external level shifting required

Get Started with Si824x Reference Design

Si824x Class D Audio Amplifier Reference Design

Jumpstart tomorrow's sound systmes with the Si824xClassD-KIT for the Si824x Class D Audio Amplifier family.

 

View Kit


Si824x Product Matrix

Devices
Part Number Data Sheet UVLO Voltage (V) Package Type Outputs Input Type Isolation Rating (kV rms) Drive Strength
Si8241BB-B-IS1
8 NB SOIC16 High Side / Low Side PWM 2.5 0.5 A
Si8241CB-B-IS1
10 NB SOIC16 High Side / Low Side PWM 2.5 0.5 A
Si8244BB-C-IS1
8 NB SOIC16 High Side / Low Side PWM 2.5 4 A
Si8244CB-C-IS1
10 NB SOIC16 High Side / Low Side PWM 2.5 4 A
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