ROHM launches new single-ear speaker amplifier for car dashboards to ensure stable voice output

According to foreign media reports, recently, Japanese multinational electronics company ROHM Semiconductor launched the BD783xxEFJ-M series ( BD78306EFJ-M , BD78310EFJ -M and BD78326EFJ-M ) of Class AB single-ear speaker amplifiers with an output power of 2.8W that meet the AEC-Q100 specification. This series of products is very suitable for instrument clusters equipped with autonomous driving and driver assistance systems (ADAS) vehicles.

(Photo credit: Roma)

In recent years, technological innovations in the automotive field, such as autonomous driving and ADAS technology, require vehicles to have a wider variety of sounds, such as warning sounds when lane departure or surrounding obstacles are detected. Even the audio output system of the instrument panel is using speaker amplifiers equipped with microcontrollers (MCUs) to produce sounds, rather than using relays to produce flickering sounds or electronic buzzers to produce sounds. However, it is still difficult to ensure that loud sounds can be produced safely and stably.

ROHM has developed the BD783xxEFJ-M series for automotive instrument panels, which require a variety of high-volume sounds, including warning sounds, turn signal sounds, welcome messages, and voice navigation. In addition, the series uses a new over-current protection (OCP) circuit to prevent output short circuits caused by accidental terminal contact, and the output power reaches 2.8W, which was previously difficult to achieve. In addition to the over-current protection function, the built-in thermal shutdown and under-voltage lockout (UVLO) functions also ensure that the product can be reliably protected from abnormal conditions.

(Photo credit: Roma)

In addition, the BD783xxEFJ-M series can also meet the automotive reliability standard AEC-Q100 and has high temperature resistance, and can operate at high temperatures up to 105°C, ensuring stable voice output and its functions are not affected even under harsh working conditions.

Rohm's BD783xxEFJ-M series speaker operational amplifiers are mounted on Cypress Semiconductor's TraveoTM Cluster MCU S6J3360 automotive application evaluation board series, making it easy to evaluate product performance under conditions similar to actual conditions.