Infineon Technologies launched its MERUS brand, uniting the existing portfolio of multi-chip modules and discrete audio products under one umbrella. The brand will spearhead the belief that the best audio amplifier ICs
- produce sound in the speakers, not heat to the surroundings
- are to be heard, but not seen
- are smaller and lighter, not bulky and heavy
- must be robust and flexible, not delicate and demanding.
Infineon is introducing a family of highly power efficient monolithic class D audio amplifier solutions that will propel audio performance to the next level. Infineon has introduced a family of four integrated multilevel audio amplifiers, the MA12040/P and the MA12070/P in two versions, respectively.
They boast power consumption in the 250mW range. For this reason, they are suited for portable battery powered products and applications with challenging thermal conditions meeting the critical design objectives for modern audio applications.
Traditional class D amplifiers are only efficient at highest music volume levels resulting in high THD, which renders quality less useful for practical implementations. In realistic audio playback situations, they consume significantly more input power (~1 W on average) than the first generation of MERUS integrated multilevel audio amplifier ICs (~0.25 W).
The newly introduced devices support up to four channels, which can be configured in parallel bridge-tied-load (PBTL), in bridge-tied-load (BTL) or in single-ended (SE) mode. As such, a single IC can output up to 160 W peak (16 A max) in a single PBTL channel or, for instance, it can be set up as a 2.1 system with 2 x 20 W tweeters as SE channels and 1 x 40 W woofer speaker as BTL channel. In addition, the products feature an advanced digital power management scheme, low THD+N (0.003 percent) and low EMI emissions.
Multilevel technology allows heatsink-free operation without filters. This reduces the BOM and overall system costs due to reduced component count and minimized cooling requirements.
The MA12040/P and the MA12070/P feature several protection modes such as undervoltage lockout (UVLO), short-circuit/overcurrent and DC protection, and over-temperature warning and error. The MERUS integrated multilevel class D audio amplifier ICs come in a 64-pin thermally enhanced QFN package with exposed thermal pad (EPAD).
The family of fully integrated ICs from the MERUS class D audio portfolio consists of the analog audio input versions, MA12040 and WiSA Endorsed MA12070, and the I2S digital audio input versions, the MA12040P and the MA12070P. All four devices can be ordered now.
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