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Send til en ven   Udskriv18/5 2010 kl. 14:15
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Klasse D forstærkerchips med unikke features

Texas Instruments lancerer klasse D forstærkerchip med automatisk gain-kontrol og avanceret kompression af dynamikområdet (in english).

Texas Instruments (TI) has introduced a 3.2-W per channel stereo Class-D amplifier and a 3-W, mono Class-D amplifier, both with fast gain ramp SmartGain automatic gain control (AGC) and programmable dynamic range compression (DRC).

 To achieve louder volume from the speaker without increasing the peak voltage, the TPA2028D1 and TPA2026D2 incorporate DRC to boost soft volumes automatically, allowing designers to compress the dynamic range of the audio to match the dynamic range of the speaker.


Designers of cell phones, notebook PCs and portable DVD players can benefit from this cost-effective, smaller amplifier that extends battery life while improving volume and clarity.

Key features and benefits of the TPA2028D1 and TPA2026D2:
- The devices have higher output power than the leading competition, yielding louder volume.
- PA2028D1 drives 3 W/channel into 4 Ohms at 5 V for 43 percent higher output power
- TPA2026D2 drives 3.2 W/channel into 4 Ohms at 5 V for 52 percent higher output power2x reduction in the quiescent current extends battery life.
- 10x reduction in offset voltage, significantly lowers pop-noise for clearer audio.
- Programmable SmartGain DRC with selectable compression ratios for up to 30-dB gain significantly enhances the loudness without increasing the peak voltage.

The TPA2028D1 is available now in a 1.63-mm x 1.63-mm, 0.5-mm pitch, 9-ball WCSP and is priced at $0.90 in 1,000-unit quantities. The TPA2026D2 is available now in a 2.2-mm x 2.2-mm, 0.5-mm pitch, 16-ball WCSP and is priced at $1.30 in 1,000-unit quantities.

To order samples or for more information, visit: www.ti.com/tpa2028d1-pr.

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