AK7841 Overview
The AK7841 is a Monaural Class-D amplifier for driving Piezo-Electric Speakers. Its built-in power boost DCDC converter generates adequate high voltage for driving Piezo Speaker from a Li-Ion battery. Output filter-less solution eliminates post LC-filters, which are normally required at Class-D outputs, and contributes to total space savings. Class-D operation ensures higher power efficiency. The AK7841 is the most appropriate for Cellular Phones with a piezo speaker.
AK7841 Key Features
- Class-D Amplifier
- Piezo-Electric Speaker Driver
- Analog Monaural signal input for both single and Differential-ended
- Monaural BTL output
- Output voltage = 12Vpp @VDD1=8.75V
- Filter-less solution
- Pop noise free architecture during power up or down
- Output short protection
- Boost DCDC Converter ：
- Input voltage = 2.7V ∼ 4.5V Æ Output voltage = 8.75V