ROHM Achieves Record Sales for Two Consecutive Years in FY2022
#Speakeramp series#
ROHM’s BD783x圎FJ-M series of speaker op amps are mounted on Cypress Semiconductor’s Traveo TM Cluster MCU Family S6J3360 Series Evaluation Board for automotive applications, allowing for easy evaluation under conditions similar to actual use.Ĭlick on the URL below for more information on the S6J3360 Series. Installed on Cypress Semiconductor’s Reference Board
An in addition to over current protection, thermal shutdown and under voltage lock out are built in that prevents damage caused by abnormal heat generation and unexpected popping/cracking noise during battery interruptions. At the same time, adopting a power package reduces heat generation even at high volumes, resulting in stable audio output without compromising functionality - even under severe conditions. The BD783x圎FJ-M series is qualified under automotive reliability standard AEC-Q100 and supports a maximum operating temperature of 105✬. Ensuring high reliability in vehicle applications This allows the BD783x圎FJ-M series to provide over current protection from output shorts which was difficult to achieve in the past while enabling high output (2.8W max. In contrast, ROHM’s new overcurrent protection circuit eliminates the need to limit the output by preventing waveform distortion even at high output. With conventional over current protection circuits, the maximum output is limited, since the operating threshold of the protection circuit must be set to a value smaller than the maximum current the speaker amp can provide. High 2.8W output with built-in over current protection Going forward, ROHM will continue to contribute to greater safety and comfort by developing high quality, high reliability products for the automotive field where sound diversification is increasing. What’s more, qualification under the automotive reliability standard AEC-Q100 and support for high temperature operation up to 105℃ enable stable voice output without compromising functionality even under severe conditions. Thermal shutdown and under voltage lock out (UVLO) are also built in to ensure high reliability protection against abnormal conditions. Also, adopting a new type of over current protection (OCP) circuit provides protection against output shorts (damage due to accidental terminal contact) that was difficult to achieve in the past, making it possible to deliver high 2.8W output. ROHM developed the BD783x圎FJ-M series for vehicle clusters requiring various sound outputs at high volume, including warning sounds, turn signals, welcome tones, and voice guidance. However, until now it was difficult to ensure safe, stable sound output at loud volumes. As a result, even audio output systems in the instrument cluster are utilizing speaker amps to generate sound with an MCU, instead of relays and electronic buzzers that produce blinker and warning sounds. In recent years, technological innovations in the automotive field - such as autonomous driving and ADAS – make it necessary to generate a wider variety of sounds, such as warning alerts for lane departure and obstacle detection. ROHM recently announced the AEC-Q100 qualified 2.8W output Class AB monaural speaker amplifiers the BD783x圎FJ-M series ( BD78306EFJ-M, BD78310EFJ-M and BD78326EFJ-M) ideal for instrument clusters - used in vehicles equipped with autonomous driving and ADAS. Optimizing for voice output for autonomous driving systems and ADAS
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