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www.rohm.com

2010.03 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

Sound Processor Series for Car Audio

Sound Processor with Built-in

3-band Equalizer

BD37524FS

●Description

BD37524FS is sound processors built-in 3-band equalizer for car audio. The functions are stereo 5ch input selector,

input-gain control, main volume, loudness, 5ch fader volume, LPF for subwoofer, level meter. 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.

●Features

1) Reduce switching noise of input gain control, mute, main volume, fader volume, bass, treble, loudness by using

advanced switch circuit [Possible to control all steps]

2) Built-in 1 differential input selector and 4 single-ended input selectors

3) Built-in ground isolation amplifier inputs, ideal for external stereo input.

4) Built-in input gain controller reduces switching noise for volume of a portable audio input.

5) Decrease the number of external components by built-in 3-band equalizer filter, LPF for subwoofer, loudness filter.

And, possible to control Q, Gv, fo of 3-band equalizer and fc of LPF, fo, Gv of loudness by I

6) It is possible for the bass, middle, and treble to the gain adjustment quantity of ±20dB and 1 dB step gain adjustment.

7) Terminals for the subwoofer outputs are equipped.

8) Bi-CMOS process is suitable for the design of low current and low energy. And it provides more quality for small scale

regulator and heat in a set.

9) Package is SSOP-A24. Putting input-terminals together and output-terminals together can make PCB layout easier

and can makes area of PCB smaller.

10) It is possible to control by 3.3V / 5V for I

●Applications

It is the optimal for the car audio. Besides, it is possible to use for the audio equipment of mini Compo, micro Compo, TV

etc with all kinds.

No.10085EAT05