SY24104QCC - Analog Class-D Audio IC with EMI Suppression


  • 2×7W into 8Ω BTL Loads @1% THD+N From a 12V Supply
  • 2×4W into 8Ω BTL Loads @10% THD+N From an 8V Supply
  • 2×2.3W into 8Ω BTL Loads @10% THD+N From a 6V Supply
  • Operates From 5.5V to 16V
  • Filterless/Filter Operation
  • Adjustable Power Limit
  • Spread-Spectrum Modulation for Good EMI Performance
  • High PSRR
  • High Efficiency Class-D Operation Eliminates Need for Heat Sinks
  • Four Fixed-gain Controlled: 20dB, 26dB, 32dB and 36dB
  • Internal Oscillator (No External Components Required)
  • Thermal and Short-Circuit Protection With Auto Recovery
  • Comprehensive Click and Pop Suppression
  • Space-saving Surface Mount QFN4×4-24 Package 

Typical Application


The SY24104 is an analog Class-D audio power amplifier. It has filterless operation control strategy which eliminates the LC filter for each channel to reduce the size of final product and the cost of mass production. It has high conversion efficiency for driving two bridge-tied stereo speakers with no need for an external heat sink when playing music. The spread spectrum operation mode is achieved internally to improve the EMI performance. The amplifier gain of SY24104 in audible bandwidth is selectable by the external pin. Output power limit is adjustable to limit the power consumption on speaker. Low-power shutdown mode is available. Fully short protection at output side against shorts to GND, VDD and out-to-out is achieved with auto recovery capability.


  • Flat Panel Display TVs, DLPRRTVs, CRT TVs
  • Powered Speakers
  • Music Instruments
  • Boom Box
  • DVD Players, Game Machines