TDA8588AJ/N3,112

Overview

The TDA8588AJ/N3,112 is an I²C-bus controlled quad audio power amplifier and multiple voltage regulator. It features four BTL amplifiers capable of driving 2 Ω loads at up to 16 V or 4 Ω loads at up to 18 V. The device includes five voltage regulators, with Regulator 2 fixed at 5 V for microcontroller supply and Regulator 3 fixed at 3.3 V. It operates within a supply voltage range of 8 V to 18 V, delivering up to 87 W into 2 Ω. The component utilizes DBSP-37 packaging and supports through-hole mounting.

Feature Summary

• Integrated I²C-bus control for independent amplifier configuration and diagnostic data retrieval.
• Complementary quad BTL audio power amplifiers with programmable clip detection and thermal protection pre-warning.
• Multiple voltage regulator section with selectable outputs and two dedicated power switches for antenna and amplifier supplies.
• Comprehensive protection mechanisms including DC/AC load detection, low battery detection, and soft thermal clipping.

Applications

• Boost amplifier and voltage regulator modules for car radios
• Power amplifier and regulator units for CD/MD players

Procurement Notes

Verify the specific suffix N3,112 against the datasheet ordering information to confirm Regulator 2 is set to 5 V and Regulator 3 is set to 3.3 V. Ensure the DBSP-37 package type matches the target PCB footprint. Confirm that the I²C bus interface requirements align with the host microcontroller specifications before finalizing procurement.

Selection Notes

Select this component when a combined solution for high-power audio amplification and system voltage regulation is required in automotive environments. The fixed 5 V and 3.3 V regulator outputs simplify microcontroller and digital signal processor power design. Consider the I²C diagnostic capabilities for advanced system monitoring and fault detection during development.

Part Context

This part belongs to the TDA8588 family of integrated circuits manufactured by NXP Semiconductors (formerly Philips). The family comprises variants distinguished by their fixed regulator output voltages, specifically the TDA8588J, TDA8588AJ, and TDA8588BJ. These devices are designed as monolithic solutions for automotive audio systems, integrating power amplification with essential system support functions.

Replacement Considerations

TDA8588J/N3,112

FAQ

What is the function of the backup capacitor connected to pin BUCAP?

The backup capacitor stores energy to maintain the Regulator 2 output voltage during brief periods when the main battery supply voltage is absent, allowing the microcontroller time to prepare for a loss-of-voltage event.

How does the device handle AC-load detection?

AC-load detection requires applying at least three periods of a 19 kHz sine wave to the amplifier inputs. If the resulting peak output current exceeds 550 mA, the device sets the AC-detect bit to indicate that an AC-coupled speaker is correctly connected.