Overview

The LA4592W is a single-chip 1.5-V headphone stereo system IC. The LA4592W adds a variety of functions, including a switch amplifier (for end product audio quality switches, the metal tape switch, and other switches) and an AMSS (Automatic Music Search System) function that supports blank skipping, to the earlier LA4590W. Furthermore, the LA4592W provides even lower no-signal time power levels for lower end-product power dissipation. In combination with the LA3235W 1.5-V record preamplifier IC, the LA4592W can be used to implement a record/playback cassette system with just two ICs.

Features

• Virtual ground impedance is reduced by built-in VREF amplifier

• No capacitor required for ripple filter oscillation prevention.

• Provides ample output power at low frequencies. (PO = 24 mW, VCC = 1.2 V, f = 150 Hz)

• High-frequency cutoff capacitors built into the preamplifier and power amplifier inputs to minimize buzzing.

Functions

• Stereo preamplifier: supports auto reverse and includes a muting function.

• Stereo power amplifier: Includes OCL and muting functions.

• Ripple filter

• Low boost function (BTL operation in the lowfrequency region)

• Inter-track detection function (Supports AMSS and blank skipping)

• Two switching amplifiers

• Power switch (standby function)