The TDA7803A-ZST is a highly advanced audio amplifier IC crafted by Microelectronics. Primarily designed for automotive applications, it offers an impressive quad Bridge-Tied Load (BTL) configuration for output. Let's navigate through its integration process.

1. Input Setup:Audio signals should be supplied to the "IN1", "IN2", "IN3", and "IN4" pins (Pins 11, 16, 7, and 20) of the TDA7803A-ZST. You will need to align these pins with your audio sources according to the relevant audio channels.

2. Output Configuration:TDA7803A-ZST provides four distinct outputs, marked as "OUT1+", "OUT1-", "OUT2+", "OUT2-", "OUT3+", "OUT3-", "OUT4+", and "OUT4-" (Pins 1, 2, 3, 4, 5, 6, 21, and 22). Your speaker system should be linked to these pins in a systematic manner.

3. Power Management:The power supply, which should fall within 8V to 18V range, is wired to the "Bat" pin (Pin 10) of TDA7803A-ZST. Additionally, connect the "POND" pins (Pins 13, 14, 15, 17, 18, and 19) to your system's ground to ensure a common voltage reference in your circuit.

4. Control Features:The TDA7803A-ZST has standby and mute functions that can be controlled using the "STAY" and "MUTE" pins (Pins 8 and 9), respectively. A high logic level signal on these pins triggers the respective modes.

5. Diagnostic Functions:To engage the diagnostic functions of TDA7803A-ZST, the "DRAG_EN" pin (Pin 12) must be set at a high logic level.

6. Thermal Considerations:Lastly, for heat management, the thermal pad underneath the TDA7803A-ZST should be securely attached to your Printed Circuit Board (PCB)'s ground plane.

Remember, abiding by the specifications outlined in the TDA7803A-ZST's data sheet is pivotal. This not only ensures optimal utilization of this versatile IC but also prevents potential circuit issues.