ST Microelectronics is shipping a new single-chip audio power amplifier that delivers 200 W, which it claims is the highest power available from an integrated commercial device. Called STA5150, the amplifier combines the patented BASH high-efficiency technology licensed from Indigo Manufacturing with ST's proprietary bipolar- CMOS-DMOS (BCD) process technology.
Merging the benefits of class AB and class D, the BASH technology uses DMOS power transistors operated in class AB mode, reducing the EMI and distortion typical of class D switching amplifiers. To maximise efficiency, by continually adjusting the power supply voltage, depending on the amplitude of the amplified audio signal, a constant voltage drop is achieved across the output transistors, completely independent of the output amplitude. Implementing this technique allows the STA5150 to deliver 200 W into a 4 Ω load with less than 10% distortion, and with an efficiency three times better than a conventional Class AB.
Each STA5150 device includes a 200 W audio power amplifier channel. This amplifier is mainly used in multichannel multimedia audio systems such as the 5.1 channel surround sound commonly used in A/V receivers. Other BASH-equipped audio power amplifiers available include the 2 x 100 STA575, 2x70 W STA550 and STA530, a quad amplifier fully configurable from 4 x 50 W to 2 x 50 W+ 1 x 100 W. The power amplifiers are used in conjunction with a digital processor, the STABP01, which is the controller for a buck (step-down) converter and implements the BASH supply voltage variation technique, by using a reference feedback signal derived from the power amplifier stage.
These power amplifiers are assembled in ST's proprietary Flexiwatt plastic package, which it developed to provide superior thermal performance, easy assembly and robustness. The products include comprehensive protection features against overload.
For more information contact Simon Churches, Arrow Altech Distribution, 011 923 9600, [email protected]
Reference board for cardio monitoring Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STDES-ESP01 reference board from STMicroelectronics demonstrates the capability of the ST1VAFE6AX and ST1VAFE3BX biosensors to detect ECG and SCG signals.
Read more...ST MCUs extend ultra-low power innovation Altron Arrow
DSP, Micros & Memory
STMicroelectronics has introduced new STM32U3 microcontrollers with cutting-edge power-saving innovations that ease deployment of smart connected tech, especially in remote locations.
Read more...Multicell battery monitoring Altron Arrow
Power Electronics / Power Management
The LTC6811 from Analog Devices is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1,2 mV.
Read more...Innovative satellite navigation receiver Altron Arrow
Telecoms, Datacoms, Wireless, IoT
STMicroelectronics has released an innovative satellite navigation receiver to democratise precise positioning for automotive and industrial applications.
Read more...LED driver for industrial power supply indication Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...High-voltage step-down DC-DC converter Altron Arrow
Power Electronics / Power Management
The MAX17793 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3 to 80 V.
Read more...Bosch sells product business to Triton Bosch Building Technologies
News & Events Products & Solutions Facilities & Building Management
Bosch is selling its Building Technologies division’s product business for security and communications technology to the European investment firm Triton. The division is set to focus on systems integration business in the future.
Read more...Nice launches DC Blue Astute garage door motor Nice Group South Africa Technews Publishing
News & Events Access Control & Identity Management Perimeter Security, Alarms & Intruder Detection
Nice Systems SA has launched the Nice DC Blue Astute, a garage door motor for the South African market featuring a pre-installed lithium-ion battery instead of traditional lead-acid batteries.
Read more...High-speed SAR ADC simplifies design Altron Arrow
Analogue, Mixed Signal, LSI
The ADI AD4080 simplifies data converter integration by integrating a low drift reference buffer, low dropout regulators and a 16K result data FIFO buffer.
printer friendly version