ST’s new audio amplifiers can drive the cabin loudspeakers in 24V vehicles directly without any external components.
Luca Celant, Audio & Power Marketing Director, ST’s Automotive Product Group explains that millions of heavy vehicle drivers often have to drive long distances with no one else in the cab for company. High-quality audio can help them stay relaxed and focused.
He adds that ST has leveraged its worldwide leadership in automotive audio power amplifiers to develop a unique product that will allow the drivers to enjoy the same audio excellence that people expect in the latest cars.
Audio amplifiers used in automotive systems must be designed to withstand the demanding automotive environment, including a high level of electrical noise and the need to provide comprehensive protection against potential hazards such as short circuits, load dumps and excessive chip temperature.
Though audio amplifiers in 12V automotive systems have reached a very high level of sophistication, audio equipment manufacturers have been unable to replicate the 12V performance in 24V systems without using external components that not only drive up the cost, but can even compromise safety under certain conditions.
Designed with the same guidelines and care used for car radio audio power amplifiers, the new TDA7576B audio amplifiers expand ST’s dedicated portfolio of products for 24V vehicles that includes recently announced chips for exterior and interior lighting.
Key features and benefits of ST’s TDA7576B 24V audio amplifiers:
- Proven BCD5 semiconductor technology allows a single chip to include power blocks and signal management blocks
- Sustains a peak supply voltage of 60V without any damage
- 24V battery operation
- High output power (2 x 20 W)
- Minimised external components
- Integrated power-saving standby function
- Diagnostic output pin alerts host controller in the event of clipping, short circuits or excessive temperature
- Output DC offset detection
- Protection against 60V load dump, excessive chip temperature, ESD and output short circuit to GND, Vcc or across the load