TDA7476013TR

Overview

The TDA7476013TR is a car radio diagnostic processor manufactured by STMicroelectronics, designed for automotive audio applications. It interfaces with power amplifiers to detect faults such as short circuits to ground or supply voltage, open loads, and shorts across the load in speaker lines. The device features five BTL equivalent inputs for audio channels and two auxiliary inputs for antenna or booster supply line diagnostics. Communication with the microcontroller occurs via an I2C bus interface, utilizing a warning pin for interrupt alerts. It operates within a supply voltage range of up to 18V and supports surface mount packaging.

Feature Summary

• Five-channel audio diagnostic capability detecting shorts to GND/Vs, open loads, and shorted loads.
• Two auxiliary inputs for monitoring antenna and booster supply lines.
• I2C bus interface with two externally selectable addresses for microcontroller communication.
• Warning pin output activates on fault conditions to alert the system controller.

Applications

• Car radio diagnostic systems
• Automotive audio amplifier protection circuits
• Vehicle infotainment harness fault detection

Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Check datasheet for specific timing capacitor requirements (CT) and current setting resistor (RCS) values to ensure correct diagnostic thresholds. Ensure proper handling due to moisture sensitivity classification.

Selection Notes

Select based on required number of audio channels and auxiliary inputs. Verify compatibility with the target I2C address configuration via the ADD pin. Ensure the operating temperature range meets automotive standards. Consider external component values for RCS and CT to tailor diagnostic sensitivity for specific amplifier types.

Part Context

This component belongs to the TDA7476 series of audio signal processors. It is specifically engineered for BCD technology integration in automotive environments. The part serves as a critical interface between the car radio unit and power amplifiers, ensuring system reliability by identifying installation errors or wiring faults before operation.

Replacement Considerations

Direct substitutes are not explicitly listed in public documentation. Evaluate alternative STMicroelectronics audio diagnostic ICs based on channel count, package type (SO-24), and I2C compatibility. Verify that any replacement maintains the same fault detection logic and electrical characteristics for seamless integration.