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.
Further reading:
Smart IMU for high/low-g acceleration
Altron Arrow
Analogue, Mixed Signal, LSI
The ISM6HG256X is a 6-axis intelligent inertial measurement unit that enables smart motion sensing, edge computing, and real-time awareness.
Read more...
Compact Schottky diodes increase efficiency
RS South Africa
Analogue, Mixed Signal, LSI
Gen 3 SiC Schottky diodes from Vishay in the compact SlimSMA HV package increase efficiency while enhancing electrical insulation.
Read more...
Silanna launches Plural ADC EVKs
Analogue, Mixed Signal, LSI
Silanna Semiconductor has released its first evaluation kits for the Plural data converter family to offer the fastest, most cost-effective way to evaluate and deploy high-performance ADCs.
Read more...
High speed, low noise 2 A driver
iCorp Technologies
Analogue, Mixed Signal, LSI
The SGM8423-2A from SGMICRO is a high efficiency, class AB, low distortion power line driver optimised to accept a signal from a Power Line Carrier modem.
Read more...
Online sensor technology hub
Analogue, Mixed Signal, LSI
Mouser’s sensor content hub offers an extensive collection of articles, blogs, eBooks, and product information from its technical experts and leading manufacturing partners.
Read more...
Ultra-low power MEMS accelerometer
Altron Arrow
Analogue, Mixed Signal, LSI
Analog Devices’ ADXL366 is an ultra-low power, 3-axis MEMS accelerometer that consumes only 0,96 µA at a 100 Hz output data rate and 191 nA when in motion-triggered wake-up mode.
Read more...
BT Audio 4 Click board
Dizzy Enterprises
Analogue, Mixed Signal, LSI
The BT Audio 4 Click board from MIKROE provides high-quality wireless audio streaming and data comms over Bluetooth.
Read more...
Precision MEMS IMU modules
Altron Arrow
Analogue, Mixed Signal, LSI
The ADIS16575/ADIS16576/ADIS16577 from Analog Devices are precision, MEMS IMUs that includes a triaxial gyroscope and a triaxial accelerometer.
Read more...
MEMS with embedded AI processing
Altron Arrow
Analogue, Mixed Signal, LSI
STMicroelectronics has announced an inertial measurement unit that combines sensors tuned for activity tracking and high-g impact measurement into a single, space-saving package.
Read more...
High-performance IMU
RS South Africa
Analogue, Mixed Signal, LSI
TDK Corporation has announced availability of the new InvenSense SmartMotion ICM-536xx family of high-performance 6-axis IMUs.
Read more...
printer friendly version