Description:

AN12948A is the stereo BTL amplifier which contained the AGC circuit for clip prevention of a speaker output and headphone amplifier within charge pump.
This IC performs a mode change by pararel control system.

Features:

In order to realize high efficiency of output power, it adopts CMOS power amplifier circuit .
Max. Power: 1.4 W (VCCSP = 5 V, RL = 8 Ω, THD = 10%)2.2 W (VCCSP = 5 V, RL = 4 Ω, THD = 10%)
The resistance and the capacitor of a detector circuit which were being used for the conventional AGC.
The filter circuit for the frequency response decision can be composed of the input circuit.
Built-in direct drive headphone amplifier within charge pump.
STBY function (countermeasure pop noise)The standby terminal of the speaker amplifier and the headphone amplifier is prepared by each of two terminals.
When either of two terminals becomes "High", it is standby OFF.
AGC ON/OFF function
AGC ON Level select function
AGC attack time select function
AGC recovery time select function
Cellular phone measures
RF noise prevention
Built-in over current protection

Package included:

• 1 x Laptop Chip AN12948A Audio Power IC for Note PC