Overview
The LA4743B is a 45 W 4-channel power amplifier IC for car stereo systems. It features a built-in bridge circuit and the ability to radically reduce the number of external components required. It is also pin compatible with the LA4743A, which differs in the amount of gain provided.

Features
• Maximum output power: 45 W ×4 channels
   (VCC= 14.4 V, 4 Ω load, 1 kHz)
• 40 W ×4 channels (VCC= 13.7 V, 4 Ωload, 1 kHz)
• Requires only seven external components and does not require an oscillation prevention RC circuit, a noise filter, or a BS capacitor.