The APA2178 is a 100-milliwatt stereo headphone driver in a small WLCSP-16 package featuring a fixed -1.5x voltage gain without the need for an external output isolation capacitor.
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APA2178 machine driver uses Charge Pump to supply negative pressure, so the headphone driver has no DC output (VDC=0V), no need to add additional output isolation capacitor, which can save the cost of two output capacitors and save the capacitor. The required PCB area. Built-in fixed input and feedback resistors can significantly reduce external components. The APA2178 has excellent PSRR and resistance to RF noise, short-circuit and over-temperature protection, fast turn-on time and small package size. It is very suitable for handheld multimedia devices.
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