TDA7560 Amplifier: Introduction, Pinout and Features | Heisener Electronics
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TDA7560 Amplifier: Introduction, Pinout and Features

Post Date: 2024-11-18 , STMicroelectronics
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TDA7560 Introduction

The TDA7560 is a high-performance Class AB audio power amplifier built using advanced BCD (Bipolar, CMOS, DMOS) technology. Packaged in a Flexiwatt 25 format, it is specifically designed to deliver high power for car radio applications, offering exceptional efficiency and reliability.

This amplifier features a fully complementary P-Channel/N-Channel output stage, enabling a rail-to-rail voltage swing. Combined with its high output current capability and minimized saturation losses, the TDA7560 sets a new standard for power delivery in the car audio domain while achieving remarkably low distortion.

1. TAB: Typically a thermal pad, connected to the ground or a heat sink for heat dissipation.

2. P-GND2: Powerground for the second channel.

3. OUT2-: Negative output for the second channel.

4. ST-BY: Standby control pin; toggles between standby mode and active operation.

5. OUT2+: Positive output for the second channel.

6. VCC: Power supply pin for the IC.

7. OUT1-: Negative output for the first channel.

8. P-GND1: Powerground for the first channel.

9. OUT1+: Positive output for the first channel.

10. SVR: Supply Voltage Reference; typically for biasing internal components.

11. IN1: Input for the first channel.

12. IN2: Input for the second channel.

13. S-GND: Signal ground; used for low-noise signal reference.

14. IN4: Input for the fourth channel.

15. IN3: Input for the third channel.

16. AC-GND: AC ground, often used for decoupling or feedback.

17. OUT3+: Positive output for the third channel.

18. P-GND3: Power ground for the third channel.

19. OUT3-: Negative output for the third channel.

20. VCC: Power supply pin for the IC (repeated).

21. OUT4+: Positive output for the fourth channel.

22. MUTE: Mute control pin; toggles mute function.

23. OUT4-: Negative output for the fourth channel.

24. P-GND4: Powerground for the fourth channel.

25. HSD: High-side driver pin; typically related to switching or protection.

Notes:

- If you are working with the ATDA7560 specifically, consult the device's datasheet for precise details and configuration examples.

- Ensure proper decoupling on VCC pins and maintain separation between signal and power grounds (e.g., S-GND and P-GND) to minimize noise.

TDA7560 Symbol

TDA7560 Footprint

TDA7560 3D Model

TDA7560 Block Diagram

TDA7560 Test and Application Circuit

TDA7560 Specification

Specification Details
Technology BCD (Bipolar, CMOS, DMOS)
Amplifier Class Class AB
Package 25-Flexiwatt (Vertical)
Number of Channels 4
Output Configuration Fully complementary P-Channel/N-Channel
Supply Voltage Range 8V ~ 18V
Typical Operating Voltage 14.4 V
Output Power 50 W x 4 at 4Ω with 14.4 V supply
Total Harmonic Distortion (THD) ≤ 0.02% at 1 W, 4Ω
Frequency Response 20 Hz ~ 20 kHz
Quiescent Current Typically 200 mA
Features Standby, Mute, Diagnostics
Rail-to-Rail Swing Supported
Short-Circuit Protection Built-in
Slew Rate High
Operating Temperature -40°C ~ 85°C

TDA7560 Features

Multipower BCD technology

MOSFET output power stage

Hi-Fi class distortion

Excellent 2 Ω driving capability

Low output noise

Standby function

Mute function

Automute at min. supply voltage detection

Low external component count:

– Internally fixed gain (26 dB) 

– No external compensation 

– No bootstrap capacitors

On board 0.35 A high side driver

Protections:

– Output short circuit to GND, to VS, across the load 

– Very inductive loads

– Overrating chip temperature with soft thermal limiter 

– Output DC offset detection 

– Load dump voltage 

– Fortuitous open GND 

– Reversed battery 

– ESD

TDA7560 Applications

SVR (Supply Voltage Rejection):

The SVR capacitor not only enhances ripple rejection but also optimizes pop noise reduction during ON/OFF transitions. A minimum value of 10 µF is recommended.

Input Stage:

The amplifier's inputs are ground-compatible and can handle high input signals up to ±8 V peak without performance degradation.

Input Capacitors:

Standard 0.1 µF input capacitors result in a low-frequency cut-off of approximately 16 Hz, suitable for high-fidelity audio.

Standby and Muting:

Both functions are CMOS-compatible. A 470 kΩ resistance and RC cells are needed to smooth transitions, ensuring noise-free operation. Standby transitions should not exceed 2.5 V/ms.

DC Offset Detector:

Integrated to prevent dangerous DC offsets that can damage speakers. It requires a 10 kΩ pulldown resistor on the HSD pin for proper operation.

Heatsink Requirements:

Under 4Ω speaker load, typical dissipation is 26 W in worst-case scenarios. To prevent thermal shutdown at 70°C ambient temperature, a heatsink with thermal resistance of 2 °C/W is advised.

TDA7560 Package

The TDA7560's 25-Flexiwatt (Vertical) package is a compact and efficient design. With dimensions of 31.3 mm × 10.2 mm and a vertical mounting style, it saves PCB space while providing excellent thermal dissipation, effectively meeting high-performance requirements. Its heatsink is electrically isolated from the ground, ensuring ease of installation and system integration.

In terms of electrical parameters, this package supports the TDA7560's rail-to-rail output swing and typical power dissipation of up to 26W. Combined with a 4Ω speaker load, the amplifier can deliver up to 50W peak output power in bridge mode, making it an ideal solution for high-power car audio systems.

FAQs

What is the TDA7560?

The TDA7560 is a high-power Class AB audio amplifier designed using BCD (Bipolar/CMOS/DMOS) technology. 

Does the TDA7560 have protection features?

Yes, the TDA7560 includes thermal shutdown, short-circuit protection, and a DC offset detector to prevent damage to the amplifier or speakers.

How does the TDA7560 manage overheating?

The TDA7560 requires a heatsink with a thermal resistance of approximately 2°C/W to prevent thermal shutdown under continuous high-power operation.

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