SGMICRO FT2810DQ

The ft2810D is a highly efficient 3.2W Class-G audio power amplifier for use in battery-based portable device applications. It integrates a filterless Class-D audio power amplifier with a Class-G charge pump regulator based upon proprietary Dual-PumpTM topology. It operates from 3.2V to 4.6V supply. With a 3.6V supply voltage, the ft2810D is capable of delivering into 4Ω load with maximum output power of 3.2W at 10% THD+N in Non-ALC mode, or constant output power of 2.8W at 0.3% THD+N in ALC mode. Its high efficiency, up to 85%, helps extend battery life. In the ft2810D, the power supply rail for the amplifier’s output stage is internally boosted and regulated at 6V by an on-chip adaptive charge pump regulator based upon the Dual-PumpTM topology, thus allowing for a much louder audio output than a stand-alone one directly connected to the battery. It makes ft2810D an ideal audio solution for portable devices that are powered by a single-cell lithium battery while requiring higher audio loudness. The ft2810D features ALC on the audio output signals, which detects the output clipping caused by the over-level input signal and automatically adjusts the voltage gain of the amplifier to eliminate the clipping while maintaining a maximally-allowed dynamic range of the audio output signals. The ALC also eliminates the output clipping due to low battery supply voltage.

• Proprietary Dual-PumpTM topology Filterless Class-D audio amplifier integrated with an adaptive Class-G charge pump regulator
• Automatic level control to eliminate output clipping
• Maximum output power (Non-ALC Mode): 3.2W (VDD = 3.6V, THD+N = 10%, RL = 4Ω + 33μF); 2.2W (VDD = 3.6V, THD+N = 10%, RL = 8Ω + 33μF)
• Constant output power (ALC Mode): 2.8W (VDD = 3.6V, THD+N = 0.3%, RL = 4Ω + 33μF); 1.8W (VDD = 3.6V, THD+N = 0.3%, RL = 8Ω + 33μF)
• High power efficiency up to 85% (RL = 8Ω + 33μF)
• Low THD + N: 0.05% (VDD = 3.6V, f = 1kHz, RL = 8Ω + 33μF, Po = 1W)
• Low quiescent current: 2.6mA (VDD = 3.6V)
• High PSRR: 76dB @ 217Hz with RL = 8Ω + 33μF
• Two gain settings: 28dB/24dB
• One-wire pulse control for the selection of operating mode and voltage gain
• Auto-recovering short-circuit protection
• Available in TQFN - 3×3 - 20AL package

• Blue-Tooth Speakers
• Mobile Phones
• Tablets
• Portable Multimedia Devices