AN12941A Datasheet (Panasonic Semiconductor)

AN12941A, Stereo Speaker Amplifier

Pin No.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 VCC SP gain high/low SW REG ripple ﬁlter pin Input for PCcard Standby on/off control R-channel input Main signal mute on/off control VREF R-channel for volume Audio mix ampliﬁer R-channel output Volume control signal

ICs for Audio Common Use AN12941A Audio power IC for notebook PC Overview The AN12941A is an amplifier IC for stereo speakers which can output 1 W by 8 Ω or 2 W by 4 Ω.

The AGC circuit is built-in to prevent the resonance or the vibration by the speaker's energy and the clipping distortion what is called "broken up sound." of the speakers.

Also, to reduce power consumption, AN12941A has a built-in function which automatically detects the input signal and can automatically enter power save

AN12941A Features

* Speaker ampliﬁer is 1 W × 2-channel: 8 Ω, VCC = 5 V or 2 W × 2-channel: 4 Ω, VCC = 5 V

* Built-in AGC circuit Prevention of the resonance or the vibration by the speaker's energy and the clipping distortion of the speaker by AGC at excessive input signal (with AGC on/off switch).