Summary of ROHM WITH NEW 2.8W HIGH POWER SPEAKER AMP ICS FOR ADVANCED INSTRUMENT CLUSTERS
ROHM announced the AEC-Q100 qualified BD783xxEFJ-M series (BD78306EFJ-M, BD78310EFJ-M, BD78326EFJ-M) 2.8W Class AB monaural speaker amplifiers for automotive instrument clusters. Designed for autonomous driving and ADAS applications, they enable high-volume outputs for warnings, turn signals, welcome tones, and voice guidance. A new over current protection (OCP) circuit allows safe 2.8W output despite potential output shorts, while built-in thermal shutdown and under voltage lock out (UVLO) provide additional reliability and protection.
Parts used in the BD783xxEFJ-M Series Speaker Amp Project:
- BD78306EFJ-M monaural Class AB speaker amplifier IC
- BD78310EFJ-M monaural Class AB speaker amplifier IC
- BD78326EFJ-M monaural Class AB speaker amplifier IC
- MCU for generating sound signals
- Speaker for instrument cluster output
- Power supply compatible with automotive systems
- Protective circuits: over current protection (OCP)
- Thermal shutdown protection circuitry
- Under voltage lock out (UVLO) protection circuitry
ROHM recently announced the AEC-Q100 qualified 2.8W output Class AB monaural speaker amplifiers the BD783xxEFJ-M series (BD78306EFJ-M, BD78310EFJ-M and BD78326EFJ-M) ideal for instrument clusters – used in vehicles equipped with autonomous driving and ADAS.
In recent years, technological innovations in the automotive field – such as autonomous driving and ADAS – require a greater variety of sounds, such as warning sound when departuring from the lane or for surrounding obstacles. As a result, even audio output systems in the instrument cluster are utilizing speaker amps to generate sound with an MCU, instead of relays that produce blinker sounds and electronic buzzers that emit warning sounds. However, until now it was difficult to ensure safe, stable sound output at loud volumes.
ROHM developed the BD783xxEFJ-M series for vehicle clusters – requiring various sound outputs at high volume, including warning sounds, turn signals, welcome tones and voice guidance. Also, adopting a new type of over current protection (OCP) circuit provides protection against output shorts (damage due to accidental terminal contact) to deliver high 2.8W output that was difficult to achieve in the past, making it possible to deliver high 2.8W output. In addition to over current protection, built-in thermal shutdown and under voltage lock out (UVLO) ensures high reliability protection against abnormal conditions.
Read more: ROHM WITH NEW 2.8W HIGH POWER SPEAKER AMP ICS FOR ADVANCED INSTRUMENT CLUSTERS
- What is the BD783xxEFJ-M series?
It is a set of AEC-Q100 qualified 2.8W output Class AB monaural speaker amplifiers for automotive instrument clusters. - Which specific models are in the BD783xxEFJ-M series?
The series includes BD78306EFJ-M, BD78310EFJ-M, and BD78326EFJ-M. - What applications are these amplifiers intended for?
They are intended for instrument clusters in vehicles, including autonomous driving and ADAS systems for warning sounds, turn signals, welcome tones, and voice guidance. - How much output power do these amplifiers provide?
They provide a high output of 2.8W. - What protection features do these amplifiers include?
They include a new over current protection circuit, thermal shutdown, and under voltage lock out (UVLO). - Why was a new OCP circuit adopted?
To provide protection against output shorts from accidental terminal contact while enabling high 2.8W output. - Can these amplifiers replace relays and electronic buzzers in clusters?
Yes, they enable MCU-driven speaker outputs instead of relays and electronic buzzers for varied sound outputs. - Are these amplifiers qualified for automotive use?
Yes, they are AEC-Q100 qualified for automotive applications.
