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  Date: 10/11/2013

3.5Wrms rated class D audio amplifier for Ultra books and tablets

Dialog Semiconductor plc has announced a new class D audio amplifier for audio amplification in Ultra books, tablet computers, and speaker accessories. The DA7202 in a 9 bump WLCSP package with 0.5mm pitch and it features 90dB Total Harmonic Distortion plus noise (THD+N) and 100dB Signal to Noise ratio. This allows the end users to experience Hi-Fi quality audio, from ground shaking lows to delicate highs, according to Dialog.

DA7202 uses a dual cell Class D amplifier to drive up to 3.5Wrms, higher power compared to other ICs of this size. DA7202 has a direct connection from the battery to Class D amp to eliminate DC-DC power loss.

Additional benefits as per Dialog include:
Robust short circuit and thermal overload protection to prevent device damage during a fault condition;
Differential audio inputs offer improved resistance to external noise; and
Low Electromagnetic Interference (EMI) by using spread spectrum modulation. This reduces interference in nearby components, thereby simplifying system design.

“The DA7202 perfectly addresses the requirements of the Ultrabook and other portable device markets powered by a dual cell battery pack,” said Udo Kratz, Senior Vice President and General Manager, Mobile Systems Business Group at Dialog. “Traditional amplifiers integrated in a CODEC are limited in the power they can supply, but our new external Class D amplifier offers a powerful and more efficient solution for the expanding dual cell market. Within Dialog, we are constantly developing power saving technologies, and this focus is enabling fresh, exciting and enhanced user experiences for the portable market,” added Kratz.

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