AmplifierCircuits

Overview: AN12942B is an one-chip IC for the stereo speakers which can output 1 W by 8 Ω, headphone amplifiers, line amplifiers, and electronic volumes. 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".  Also the AN12942B is built-in power saving on/off function automatically detecting input signal to save the power of speaker  amplifier. Circuit Diagram: Audio signal processing

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  mode when there is no signal. 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). Built-in automatic power saving function  It detects input signals and switches on/off (with  the on/off switch for the automatic power saving). Ope...

Features: Two preamplifiers on chip. Fewer peripheral parts. Low noise. 8-pin SIP package facilitating easy mounting. Circuit Diagram: Circuit diagram for 2-Channel Preamplifier For Car Stereo LA3160 Datasheet for  LA3160: Download

Overview: The LA4628 is a 2-channel general-purpose BTL audio  power amplifier provided in a miniature package. It was  designed for the best possible audio quality and features  an extended low band roll-off frequency provided by a  newly-developed NF circuit that does not require an  external capacitor. Furthermore, crosstalk, which can  cause muddiness in the audio output, has been  significantly reduced by both circuit and wiring pattern  improvements. Thus this amplifier can provide powerful  lows an clear highs.  Note that this device is pin compatible with the 13.5 W ×  2-channel LA4625, and allows end products differentiated  by their power rating to share the same printed circuit  board. Features: Total output: 20 W + 20 W (at VCC = 13.5 V, RL = 4 Ω, THD = 10%) High-fidelity design (fL < 10 Hz, fH = 130 kHz) Extremely low impulse noise levels An arbitrary amplifier startup time can be set up wi...

Circuit diagram for 2-Channel 30W BTL Audio Amplifier layout 2-Channel 30W BTL Audio Amplifier

FEATURES Class D/1-Bit Audio Power Output Stage 5 V Analog and Digital Supply Voltages Power Stage Power Supply 8 V to 20 V Output Power @ 0.1% THD + N Stereo Mode 2 20 W @ 4  @ 14.4 V 2 20 W @ 8  @ 20 V Mono Mode 1 40 W @ 4  @ 20 V RON < 320 m (per Transistor) Efficiency > 85% @ Full Power/8  Clickless Mute Function Turn-On and Turn-Off Pop Suppression Short-Circuit Protection Overtemperature Protection Data Loss Protection 2-Channel BTL Outputs or 4-Channel Single-Ended Outputs 52-Lead Exposed Pad TQFP Package Low Cost DMOS Process APPLICATIONS: PC Audio Systems Minicomponents Automotive Amplifiers Home Theater Systems Televisions GENERAL DESCRIPTION: The AD1991 is a 2-channel BTL or 4-channel single-ended  class D audio power output stage. The part is configured during  reset to be in either 2-channel mode or 4-channel mode.  To protect the IC as well as the connected speakers, the AD1991  pr...