BD37513FS, BD37514FS, BD37515FS are sound processors built-in 2-band equalizer for car audio. The functions are stereo 4ch input selector, input-gain control, main volume, loudness, 5ch fader volume (About BD37513FS, 4ch fader volume are available). Moreover, “Advanced switch circuit”, that is ROHM original technology, can reduce various switching noise (ex. No-signal, low frequency likes 20Hz & large signal inputs). “Advanced switch” makes control of microcomputer easier, and can construct high quality car audio system.
The BD37513FS, BD37514FS and BD37515FS are ROHM sound‑processor ICs for car audio that integrate a 2‑band equalizer, input selector, gain control, volume, loudness and fader functions. They use ROHM’s Advanced switch circuit to minimise switching noise and simplify micro‑controller integration.
The document provides electrical specifications, absolute maximum ratings, pin‑out diagrams, application examples and ordering information. It also includes characteristic curves for gain, THD, CMRR and other performance parameters.
| Input selector | Stereo 3 input, Differential 1 input |
|---|---|
| Input gain range | +20~0dB (1dB step) |
| Volume range | +15dB~-79dB (1dB step) |
| Bass gain range | +20~-20dB (1dB step) |
| Treble gain range | +20~-20dB (1dB step) |
| Power supply voltage | 7.0 V – 9.5 V |
| Storage temperature | -55 °C – +150 °C |
| Package | SSOP‑A20 |
The device provides a stereo 3‑input selector and a differential 1‑input selector.
It uses ROHM’s Advanced switch circuit, which suppresses switching noise in gain, mute, volume and fader functions.
The IC operates with a VCC of 7.0 V to 9.5 V.
The part is supplied in an SSOP‑A20 package.