TA8255AHQ TOSHIBA Semiconductor CORPORATION, TA8255AHQ Datasheet - Page 5

• Manufacturer Part Number: TA8255AHQ
• Description: Max Power 22w Btl ? 4ch Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

5. Muting function: Pin(1), pin(25)
6. AUX. amplifier: Pin(16)
By means of controlling pin(25) (mute control terminal) less than about 1.5 V, it can make the IC muting
condition as below. However, pin(25) must not be connected to a certain voltage, for example, V
etc. In other words, pin(25) is inhibited to be pulled up, for instance fig 5 application.
The attenuation by the muting function is 70 dB (typ.). This muting is very smooth attenuating by the time
constant of pin(1): Smoothing.
Therefore, this function is suitable to the audio muting. The time for attenuation: Tatt is adjustable by changing
the capacitance of C
So, please decide the time of tatt by testing on the units.
The pin(16) is for input terminal of AUX. amplifier.
The total gain is 0 dB by using of AUX. amplifier.
Therefore, the µ−con can directly drive the AUX. amplifier.
3
. But the tatt may influence the popping noise level.
5
TA8255AHQ
CC
, V
2006-04-28
DD
, V
ref
, …