UTC34119
DESCRIPTION
LI
NEAR I
NTEGRATED CI
RCUI
T
LOW POWER AUDIO AMPLIFIER
The UTC34119 is a low power audio amplifier integrated
circuit intended (primarily) for the telephone applications,
such as in speakerphones. It provides differential speaker
outputs to maximize output swing at low supply voltages.
Coupling Capacitor to the speaker are not required. Open
loop gain is 80dB, and the closed loop gain is set with two
external resistors. A chips Disable pin permits powering
down and/or muting the input signal.
FEATURES
*Wide operating supply voltage: Vcc=2~16V
*Low quiescent supply current(Icc=2.7mA,typical)
*Medium output power
Po=250mW at Vcc=6V,R
L
=32ohm ,Thd=10%
*Load Impedance range(8 ohms to 100 ohm)
*Low distortion
*Mute function(Icc=65碌A, typical)
*Minimum number of external parts required.
DIP-8
BLOCK DIAGRAM
Inverting
Input
Non-
Inverting
Input
4
3
Amp 1
R
R
5
Output 1
Amp 2
8
1
Output 2
Vcc
6
Bias
MUTE
2
Ripplie
Rejection
7
GND
YOUW ANG ELECTRONI CO.
CS
LTD
1
1
2
3
4
