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BCT89318A
High efficiency, Low noise Class T Audio Amplifier
GENERAL DESCRIPTION
BCT89318A is specifically designed to enhance smart mobile phone sound quality, which is an innovative high efficiency, low noise, ultra-low distortion, constant large volume, Class T audio amplifier, using our unique Digital Power Modulation (DPM) audio algorithm, effectively eliminate audio noise, increase signal Dynamic range which will greatly improve sound quality and volume. With an advance TOP power technology, efficiency reach 93%, and power amplifier’s overall efficiency is up to 83%, greatly saves the mobile phone power consumption and prolong the mobile phone usage time. The BCT89318A noise floor is as low as to 43μV, with 99dB high signal-to-noise-ratio(SNR). The ultra-low distortion 0.08% and unique Digital Power Modulation technology brings high quality music enjoyment.
BCT89318A has 0.6W, 0.7W, 0.8W, 0.9W, 1W,1.1W and 1.2W seven selectable speaker- protection output power levels, which is suitable for different rated power speakers. With Digital Power Modulation Audio Algorithms, the music is pure nature and melodious. Within lithium battery voltage range (3.3V~4.35V), output power is constant, preventing the voice becomes smaller and smaller during usage of cell phone.
BCT89318A supports the special speaker and receiver two-in-one application. In receiver mode, the output noise floor is as low as 19uV, amplifier is in class D mode, powered by VCC.
BCT89318A has built-in over current protection, over-temperature protection and short circuit protection function, effectively protecting the chip from damage. The BCT89318A uses small 0.4mm pitch FCQFN1.6x1.6-16L package.
APPLICATIONS
Cellular Phones
Portable Audio Devices
Mini Speakers
Tablets
FEATURES
Digital Power Modulation audio algorithm, effectively eliminate music noise, make sound pure nature
Power amplifier overall efficiency 83%
Low noise：43μV
Ultra-low distortion：0.08%
Speaker and Receiver two-in-one application
Receiver：1V/V, Vn=19μV, THD+N=0.02%
Receiver：3V/V, Vn=22μV, THD+N=0.01%
Selectable speaker-protection power level：0.6w, 0.7W, 0.8W, 0.9W, 1.0W, 1.1W, 1.2W
Within voltage range(3.3V~4.35V), output power is maintained constant
Support 6ohm speaker
Excellent pop-click suppression
One wire pulse control
High PSRR：-68dB (217Hz)
ESD protection：±6kV (HBM)
Small 0.4mm pitch FCQFN1.6x1.6-16L package
