Analogue, Mixed Signal, LSI


Stereo Class D amplifier

11 November 2009 Analogue, Mixed Signal, LSI

STMicroelectronics has developed a new 50 W + 50 W stereo Class D amplifier IC that achieves high efficiency and requires few external components. Joining ST’s family of analog-input Class D ICs, the TDA7492 expands the family at the high end. The family now includes 3 W-, 5 W-, 10 W-, 20 W-, 25 W, and 50 W-per-channel variants in pin-compatible packages that enable convenient scaling of designs to address multiple markets.

The TDA7492 uses ST’s advanced sixth-generation BCD6S (bipolar/CMOS/DMOS) process, which allows analog, logic and high-voltage functions on a single chip. This process achieves high operating efficiency per chip size, while simultaneously reducing crosstalk, leading to improved audio quality. In addition, BCD6S enables complementary NMOS and PMOS transistors in the high-power output circuitry, saving the external bootstrap capacitor and diode normally required by other processes.

The device achieves low distortion (THD+N) of below 0,01% to deliver a high-quality listening experience. Built-in output filtering minimises the external audio-filter requirement, and standby and mute functions are also integrated. The IC is optimised for low EMI emissions, which further simplifies the design of Class D amplifiers delivering smaller size and greater audio power than conventional class-A/B circuits.

Other features include external synchronisation, which allows high-performance, multichannel Class D amplifiers combining several individual ICs. The thermally enhanced Power SSO-36 package has an exposed upper heat slug allowing convenient attachment of a simple heatsink.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Radiation-tolerant PolarFire FPGA
23 October 2019, Avnet South Africa , Programmable Logic
Developers of spacecraft electronics use radiation-tolerant (RT) field programmable gate arrays (FPGAs) to create on-board systems that meet the demanding performance needs of future space missions, survive ...

Read more...
Absolute pressure sensor
23 October 2019 , Analogue, Mixed Signal, LSI
Würth Elektronik has developed a very compact MEMS-based (micro electro-mechanical system) absolute pressure sensor: the 2,0 x 2,0 x 0,8 mm sized WSEN-PADS measures pressure in the range between 26 and ...

Read more...
Radiation-tolerant PolarFire FPGA
25 November 2019, Avnet South Africa , Programmable Logic
Developers of spacecraft electronics use radiation-tolerant (RT) field programmable gate arrays (FPGAs) to create on-board systems that meet the demanding performance needs of future space missions, survive ...

Read more...
Design considerations for powering remote Bluetooth beacons
25 November 2019, Avnet South Africa , Power Electronics / Power Management, Editor's Choice
One of the most exciting low-power wireless technologies to emerge in the last couple of years is Bluetooth beacon technology, which involves placing small electronic beacon devices at points of interest that broadcast packets of information via Bluetooth low energy to the smartphones of passers-by.

Read more...
Bluetooth 5.0 audio IC and module
25 November 2019, Avnet South Africa , Telecoms, Datacoms, Wireless, IoT
To help Bluetooth speaker and headphone manufacturers maintain product differentiation in the competitive wireless audio market, Microchip Technology released the next generation of its Bluetooth 5.0-qualified ...

Read more...
Absolute pressure sensor
25 November 2019, Würth Elektronik eiSos , Analogue, Mixed Signal, LSI
Würth Elektronik has developed a very compact MEMS-based (micro electro-mechanical system) absolute pressure sensor: the 2,0 x 2,0 x 0,8 mm sized WSEN-PADS measures pressure in the range between 26 and ...

Read more...
Battery charger for medical and personal electronics
25 November 2019, Avnet South Africa , Power Electronics / Power Management
Texas Instruments introduced a new switching battery charger IC that supports a termination current of 20 mA. Compared to competing devices, which typically support a termination current higher than 60 ...

Read more...
Highly accurate temperature sensors
25 November 2019, Future Electronics , Analogue, Mixed Signal, LSI
New from ams is the AS621x-generation of temperature sensors delivering optimised performance for consumer electronic devices and wearables, health-related monitoring systems and heating, ventilation ...

Read more...
BAW-based chips for comms infrastructure
25 November 2019, Avnet South Africa , Telecoms, Datacoms, Wireless, IoT
Texas Instruments debuted new bulk acoustic wave (BAW)-based embedded processing and analog chips for the next generation of connectivity and communications infrastructure. The first two devices developed ...

Read more...
Secure element for IoT authentication
25 November 2019, Tempe Technologies , Analogue, Mixed Signal, LSI
The Microchip ATECC608A secure element from Microchip Technology integrates ECDH (Elliptic Curve Diffie Hellman) security protocol, an ultra-secure method to provide key agreement for encryption/decryption, ...

Read more...