Stereo Sound Controller IC BA3853BFS

Stereo Sound Controller IC BA3853BFS

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On: 01 Des, 2018

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Category: Circuit

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The BA3853BFS is a dual-channel electronic volume controller built around a low-noise, low-distortion VCA. It is suited for car-audio applications, and has performance that rivals mechanical-type volume controllers.

In addition to volume c...

The BA3853BFS is a dual-channel electronic volume controller built around a low-noise, low-distortion VCA. It is suited for car-audio applications, and has performance that rivals mechanical-type volume controllers.

In addition to volume control, the IC includes all functions required for controlling sound quality, to allow more compact designs with far fewer components.

stereo sound controller ic ba3853bfs 1.jpg

stereo sound controller ic ba3853bfs 2.jpg


Applications
Car audio systems


Features

1) Provides electronic control for volume, balance, fad-er, tone (bass and treble), and loudness.
2) The volume control circuit is a low-distortion, low-noise VCA circuit that uses DC voltage for control. The IC uses an internally-generated, temperature compensated reference voltage and is capable of dual-channel control with the addition of a single potentiometer.
3) Available in an SSOP-24 package that is ideal for compact designs

Circuit operation
(1) As shown is the block diagram, the main circuit blocks are the main volume (front and rear), tone control (bass and treble), and balance and fader. Signal control for each block is possible with a DC voltage.
(2) The main volume is comprised of a front volume and rear volume controller. The front volume controller has 18dB of attenuation.
(3) The tone filter is an external CR circuit. Refer to item 5 of the application notes regarding the component values.
     (4) The loudness is set by a calculation based on the tone control current. Refer to control curves item 3 of the application notes.
     (5) The control curves for the balance and fader are given in the measurement data.

Source:233451_ds.pdf

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