TDA7476

The STMicroelectronics TDA7476 is a specialized integrated circuit designed as a car radio diagnostic processor. It utilizes BCD Technology and is intended for automotive audio applications, enabling the detection of potential faults within the car radio system or its harness. This device can identify issues in loudspeaker lines and antenna/booster supply lines, providing an I2C bus-compatible output signal to disable faulty ICs or alert a microcontroller.

The TDA7476 operates with a wide voltage range, featuring a standby function with low quiescent current consumption. It includes an I2C bus interface with two externally selectable addresses. The processor offers up to 5 BTL equivalent inputs for fault detection in audio channels, covering conditions like short to GND, short to Vs, short across the load, and open load. Additionally, it has 2 auxiliary inputs for fault detection in antenna and booster supply lines, including short to GND and open load detection. A warning pin provides an interrupt facility activated under specific fault conditions such as audio channel shorted to Vs or GND, or auxiliary input shorted to GND.

This component is housed in a 24-SOIC package and supports surface mount installation. It operates with a supply voltage of up to 18V and has a peak supply voltage rating of 40V. The maximum power dissipation is 1.5W at 25°C. The operating temperature range is from -40°C to 150°C.