Pre / Power Amplifier And Motor Governor For 3v Headphone Stereos - Rohm

The BA3528AFP and AB3529AFP have been developed for Headphone stereos. They run off a 3V power supply, and include dual pre- and power Amplifiers and a motor governor. The preamplifiers are direct-coupled, and the power Amplifiers use a fixed-gain NF circuit. An on-chip VREF Amplifier makes output coupling capacitors unnecessary, and the motor governor uses a bridge ratio system to minimize the exter- nal parts count and make reliable and compact designs possible. By ROHM Co. Ltd.