Tel:886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
MUTE
When the mute pin is connected to the GND, all of outputs signal will be muted immediately.
Connecting the external R/C components on here could prevent the power–on “POP” noises, the mute
function also can be active by the external DC voltage.
Due to the built-in pull down resistor (150KΩ), a larger value series resistor connecting to the mute pin
may causes mute malfunction because of mute voltage divided by the resistor network. For the
detailed connection description please refer to the application circuit.
The attenuation of mute is relation with CB, we suggest CB must be higher then 10µF, the recommend
value is 47µF. Higher CB will have better mute characteristic.
PT2309 V1.2
-5-
August, 2006
PTC [ PRINCETON TECHNOLOGY CORP ]
