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Date: 04-06-10

2x100W class-D power amplifiers from ST deliver audiophile sound quality

ST has announced production availability of TDA7498, an analog-input 2x100W class-D power amplifier, which ST claims belongs to a group of class-D PAs that deliver audiophile sound quality in components smaller than competing devices by using an advanced chip manufacturing process.

The TDA7498 targets performance-featured equipment such as DVD and Blu-ray players, home theater, active speakers, and docking stations where it will utilize the class-D amplifiers' energy efficiency and low heat generation support product styling and also eliminate heatsinks and high-wattage power supplies. Class-D products make up the majority of audio products, where small size, low power consumption and high audio outputs are fundamental demands. It is pin compatible with the TDA7492 2x50W amplifier, the 2x80W TDA7498L and 100W mono TDA7498MV. The TDA7498 can also be externally synchronized, thus saving external components and avoiding cross-channel interference between channels.

"ST's class-D portfolio delivers performance, size and cost advantages, leveraging the technology lead we have established over our competitors," said Andrea Onetti, General Manager, Audio Division, within ST's Home Entertainment and Displays Group. "The TDA7498 will enable our customers to create high-end multimedia products that look as good as they sound, which is increasingly important in today's consumer markets."

ST's class-D amplifier range use BCD6S manufacturing technology, which allows analog, logic, and high-voltage functions to be built on a single chip. ST says that its class-D ICs are typically smaller than competitors' devices. The BCD6S allows complementary N- and P-type transistors in the output circuitry, which saves the external bootstrap capacitor and diode normally required with processes that support N-type transistors only.

Some of the specifications of the TDA7498 are:

--10.3 x 7.5mm package outline
--Supply voltage range: 10V to 39V
--Up to 90% operating efficiency
--10% THD + N @ full power into 6 ohm speaker load; Vcc = 36V
--Pop-free mute control
--Four selectable gain settings: 25.6dB, 31.6dB, 35.1dB, 37.6dB

Package: PowerSSO36

Price: It is priced at US$4.5 for 1000 pieces.

For further information visit: www.st.com

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