Ultra Low EMI, 3W Filter-less Mono Class-D Audio Power Amplifier
With Anti-Crack Protection
◼ General Description
OCA7220A is a Anti-Crack Protection, ultra-low
EMI, Monaural, 3W class D audio power amplifier.
Anti-Crack Protection function can adjust system gain
automatically by detecting the output Broken audio
distortion. It is not only avoiding the speaker from the
damage caused by overload output power, but also
offering a comfortable listening experience.
OCA7220A use proprietary EEE (Enhanced
Emission Elimination) technology, significantly lower
EMI interference in the whole bandwidth. To 60cm
audio line, there is more than 20dB margin, under the
OCA7220A no filter PWM modulation structure
and built-in gain reduce the external components,
PCB area, system costs, and simplifying the design.
Up to 90% Efficiency fit for mobile phones and other
portable audio products more.
OCA7220A built-in over current protection,
thermal protection and low voltage malfunction
prevention function, effectively protect chip in the
abnormal working conditions from being damaged.
OCA7220A provides 1.37mm * 1.37mm
WLCSP9 package, rated operating temperature
range is -40 ℃ to 85 ℃.
⚫ Anti-Crack Protection provides three operating
⚫ Ultra low EMI
⚫ POP noise reduction function
⚫ Maximum output 3W
⚫ Distortion rate
⚫ Filter free Class-D Structure
⚫ Up to 90% efficiency
⚫ High PSRR:-80dB(217Hz)
⚫ Low Quiescent Current（2.8mA）
⚫ Low shutdown current（<0.1uA）
⚫ Operating Voltage Range:2.5V～5.5V
⚫ Over-current protection function
⚫ Thermal protection function
⚫ Under-Voltage Lock-Out.
⚫ Cellular Phone
⚫ Digital Photo Frame
◼ Typical Application Circuit
Figure 1.Differential input application
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Rev. 1.1 Feb .27, 2018