Overview

The LA4728 is a BTL two-channel power IC for car audios developed in pursuit of excellent sound quality. Low-region frequency characteristics have been improved through the use of a new NF capacitorless circuit, and crosstalk which causes “muddy” sound has been reduced by improving both circuit and pattern layout. As a result the LA4728 provides powerful bass and clear treble.

Features

⋅ High power: supports total output of 35 W+35 W. [EIAJ power] (VCC=14.4 V, THD=30 %, RL=4 Ω)

⋅ Less pop noise.

⋅ Designed for excellent sound quality.

(fL<10 Hz, fH=130 kHz)

⋅ Any rise time settable by an external capacitor.

⋅ Standby switch circuit on chip. (microcontroller support ed)

⋅ Various protectors on chip.

(output-to-ground short/ output-to-VCCshort/ load short/ overvoltage/ thermal shutdown circuit)

⋅ The LA4728 is pin-compatible with the LA4725.