MAX98397
Description
The MAX98397 is a high-efficiency, mono Class-DG speaker amplifier with industry-leading quiescent power, featuring integrated speaker current and voltage sensing (IVSENSE), a brownout-prevention engine (BPE), and dynamic-headroom tracking (DHT). The device also enables ultrasound applications by providing support for sample rates up to 192k Hz, a higher passband (for f S > 50k Hz), and a bypass path for the ultrasound signals through the amplifier so it is not attenuated by the audio processing. Precision output current monitoring (ISENSE) and voltage monitoring (VSENSE) enable speaker protection algorithms to be run by a host device. Spread-spectrum modulation (SSM) and edge rate control minimize EMI and eliminate the need for the output filtering found in traditional Class-D devices.
To achieve industry-leading quiescent power, the Class DG architecture employs two supply rails; VBAT (3V to 5.5V) and PVDD (3V to 28V) to supply the speaker amplifier. The Class-DG amplifier...
