LA4632-E-ON

Audio Amplifiers Overview

The LA4632-E-ON is a monolithic linear IC serving as a 10W 2-channel BTL AF power amplifier for audio applications. It operates within a maximum supply voltage of 24V and delivers up to 25W allowable power dissipation with an infinite heat sink. The device features a recommended supply voltage of 13V, supporting load resistances from 4 to 8 ohms. Electrical characteristics include a typical voltage gain of 35dB, output power of 10W at 10% THD, and standby current of 10µA. It incorporates protection against shorting to the power supply, ground, load shorts, and excessive temperatures.

Audio Amplifiers Feature Summary

• Pin-compatible design allowing shared printed circuit boards with the LA4631 series.
• Built-in comprehensive protection circuits including thermal, short-to-power, short-to-ground, and load shorting safeguards.
• Logic-controlled standby mode and mute control inputs for low-power operation.

Audio Amplifiers Applications

• Automotive stereo systems
• General-purpose audio amplification equipment
• Home appliances with audio functions

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix matches the required package and temperature range. Confirm that the supplier documentation explicitly identifies the component as the LA4632 variant. Ensure the source provides valid traceability for the Sanyo Semiconductor or onsemi designation to avoid counterfeit parts.

Audio Amplifiers Selection Notes

Select this component when a pin-compatible upgrade from the LA4631 is required for higher power output. Ensure the application design accounts for the absence of Pin 13 compared to the LA4631. Verify that external components, particularly input coupling capacitors and ripple filters, are sized according to the specific startup time and bias requirements outlined in the datasheet.

Audio Amplifiers Part Context

The LA4632 is part of the Sanyo Semiconductor (now onsemi) LA46xx family of audio power amplifiers. It serves as the bridge-tied load (BTL) counterpart to the single-ended LA4631. This relationship allows manufacturers to utilize identical PCB layouts across different product tiers, simplifying production while offering varied performance levels.

Audio Amplifiers Replacement Considerations

The LA4631 is the direct pin-compatible predecessor. Designers must account for the missing Pin 13 on the LA4632 when replacing it on existing LA4631 boards. External component values may differ between the two models.