SY24108QEC - Analog Class-D Audio IC


  • 2×14W into 8Ω BTL Loads @ <1% THD+N from a 16V Supply
  • 2×20W into 4Ω BTL Loads @ <1% THD+N from a 16V Supply
  • Wide Voltage Range: 5.6V to 16V
  • Filter-free Operation
  • Adjustable Power Limit
  • Differential and Single-ended Inputs
  • Internal Feedback Control with High PSRR
  • High Efficiency Class-D Operation Eliminates Need for Heat Sinks
  • AM/AF Avoidance
  • Master and Slave Synchronization
  • Four Fixed-gain Controlled: 20dB, 26dB, 32dB and 36dB
  • Selectable BD Mode and 1SPW Mode Modulation
  • Integrated Protection Circuits Including  Under Voltage, Over Temperature, DC Error, and Short Circuit
  • Comprehensive Click and Pop Suppression
  • Space-saving Surface Mount 32Pin QFN 5mm×5mm Package

Typical Application


The SY24108 is a Class-D audio power amplifier with analog input and high-power efficiency for driving bridge-tied stereo speakers with up to 2×20W/4Ω. The efficiency of the SY24108 eliminates the need for an external heat sink when playing music.
The SY24108 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM/AF interferences; this is achieved together with an option of Master and Slave synchronization, making it possible to synchronize multiple devices.
The SY24108 is fully protected against faults including short circuit, over temperature, DC error, under voltage. The short circuit, over temperature and DC error protection includes an auto-recovery feature. The under voltage protection with hysteresis can be self-cleared.


  • Flat Panel Display TVs
  • DLP® TVs
  • CRT TVs
  • Powered Speakers
  • Music Instruments
  • Boom Box
  • Consumer Audio Applications