Low-noise AEC-Q101 diodes solve challenges in power amplifiers

23rd September 2019
Posted By : Alex Lynn
Low-noise AEC-Q101 diodes solve challenges in power amplifiers

Power Integrations has announced that its 200V Qspeed diodes, LQ10N200CQ and LQ20N200CQ, are now available with AEC-Q101 automotive qualification. Qspeed silicon diodes use merged-PIN technology to offer a unique balance of soft switching and low reverse recovery charge (Qrr). This results in low EMI and reduced output noise, which is especially important for in-vehicle audio systems.

The newly qualified 200V diodes feature the industry’s lowest reverse recovery charge, typically 32.4 nC at TJ of 125°C, and a diode softness ratio of 0.39. This minimises high-frequency EMI inherent in the Schottky rectifiers often used in Class-D power amplifier output stages. Dual ten and 20A common-cathode diodes are housed in the industry-standard, rugged DPAK TO-252 package.

Comments Edward Ong, Product Marketing Manager at Power Integrations, said: “The automotive audio industry has been clamoring for an alternative to Schottky diodes with their ‘snappy’ reverse recovery, which causes ringing that generates EMI and noise in sensitive Class D amplifiers. Our automotive-qualified 200 V QSpeed diodes are the perfect solution for in-car audio amplification applications.”

The LQ10N200CQ and LQ20N200CQ diodes are produced in IATF 16949-certified facilities. Devices are available now; the LQ10N200CQ and LQ20N200CQ are priced at $0.60 and $0.74 respectively in 10,000 quantities.


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