APPLICATIONS
DESCRIPTION
The integrated circuit, U4083B, is a low power audio amplifier for a telephone loudspeaker. It has differential speaker outputs to maximize the output swing at low supply voltages. There is no need for coupler capacitors. A chip disable pin permits powering down and/or muting the input signal. FEATURES
D Wide operating voltage range: 2 to 16 V D Battery powered application due to low quiescent supply current: 2.7 mA typical D Output Power, Po = 250 mW @ RL = 32 W (speaker) D Low harmonic distortion (0.5% typical) D Wide range gain adjustable: 0 dB to 46 dB D Chip disable input to power down the integrated circuit Benefits D Low number of external components D Low current consumption D Low power down quiescent current D Drives a wide range of speaker loads Block Diagram / Application Circuit 0.1mF Input Ci 1mF 75 k W Ri 3 kW Rf 4 Vi FC1 3 C1 5mF 50 k W 2 125 kW 50 k W – + Amp.1 5 4 kW VO1 4 kW – + Amp.2 Bias circuit 7 GND Figure 1. V S 6 8 VO2 1 CD C2 FC2 93 7781 e Order Information Extended Type Number U4083B-AFP U4083B-AFPG3 Package SO8 SO8 Remarks Taped and reeled TELEFUNKEN Semiconductors Rev.
TEMIC Semiconductors
