This document introduces the Sound Processor Series for Car Audio from ROHM, including the BD3433K 6ch Electronic Volume for 5.1ch Car Theater. It features high voltage output, low distortion, and low noise, making it suitable for applications such as car audio and car navigation.
The BD3433K is a 6‑channel electronic volume device for 5.1‑channel car theater systems. It integrates independent front/rear selectors, gain amplifiers, soft‑switching volume control, and a monauric mixing circuit, delivering a high‑voltage output of 5.6 Vrms while maintaining low distortion and noise.
The document lists absolute maximum ratings, electrical characteristics, pin assignments, block diagrams, and usage notes. It also includes ordering information, package dimensions (QFP44), and safety guidelines for designers integrating the part into automotive audio or navigation equipment.
| High voltage output | 5.6 Vrms |
|---|---|
| Low distortion rate | 0.001 % |
| Low noise | 3 µVrms |
| Operating temperature range | -40 °C to +85 °C |
| Power dissipation | 850 mW |
The device can deliver a maximum output voltage of 5.6 Vrms.
It is rated for operation from –40 °C up to +85 °C.
The part provides six independent audio channels.
It supports a 3‑wire serial interface compatible with both 3.3 V and 5 V microcomputers.