ISL54004IRTZ-T

Overview

The ISL54004IRTZ-T is an integrated audio amplifier system manufactured by Renesas Electronics Corporation, housed in a 20-lead 4x4 TQFN package. It combines a mono bridge-tied load (BTL) amplifier and stereo single-ended headphone amplifiers. Operating from a single +2.7V to +5.5V supply, it delivers up to 1.23W into an 8Ω BTL speaker and 215mW into 16Ω headphones at 1% THD+N. The device features four-level programmable gain, automatic headphone detection switching, low power shutdown, thermal overload protection, and click/pop suppression.

Feature Summary

• Integrates a mono BTL speaker amplifier with two stereo single-ended headphone amplifiers for combined audio output.
• Features automatic headphone sense circuitry that detects jack insertion and switches audio routing between the speaker and headphone drivers.
• Includes internal logic control pins to override headphone sensing and select among four programmable gain levels without external resistors.
• Provides low power shutdown mode, thermal overload protection, and click/pop suppression circuitry to prevent transient noise during state transitions.

Applications

• Battery-powered handheld equipment such as cellular phones
• Portable media players including MP3 and DVD players
• Handheld gaming devices and toys

Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm RoHS compliance and MSL classification before assembly. Review datasheet specifications for absolute maximum ratings and thermal resistance values to ensure proper PCB layout and heat dissipation design.

Selection Notes

Select this component for designs requiring a single-chip solution for both speaker and headphone outputs. Ensure the application operates within the specified voltage range and utilizes the 20-lead TQFN package constraints. Consider the programmable gain settings and headphone detection logic requirements for system integration.

Part Context

This part belongs to the ISL54004 series of integrated audio amplifier systems. It is designed for portable electronics where space and power efficiency are critical. The device consolidates multiple amplifier functions into one package, reducing the need for external components and simplifying board layout for mobile applications.

Replacement Considerations

No recommended replacement parts are available according to official documentation. Contact technical support for potential alternatives or updated product information.

FAQ

How does the ISL54004 switch between speaker and headphone modes?

The device uses a headphone sense input circuit that detects when a headphone jack is inserted. Upon detection, it automatically switches the audio inputs from the mono BTL driver to the headphone drivers. A logic control pin can also be used to override this function.

What is the purpose of the click and pop suppression circuitry?

The click and pop suppression circuitry prevents audible clicks and pops at the speakers when the device transitions in and out of the shutdown state. It maintains bias voltage connections during these transitions to minimize transients.