High-Efficiency Class-D Stereo Audio Amplifier from Diodes

22.11. 2021 | News
01.jpg

Diodes Incorporated introduces the PAM8965 Class-D stereo audio power amplifier with an integrated synchronous boost converter. This high-efficiency device is targeted for use in AI-enabled speaker systems and portable musical instruments - where elevated output power, extended battery life, and compact construction are all key requirements.

Running off a 2.8V to 8.5V supply, the PAM8965 has the capability to drive 12W into 4Ω speakers via each of its two channels, with 92% efficiency. By incorporating a synchronous boost converter, with pulse frequency modulation (PFM) operation at light loads, this device is not only able to deliver augmented performance and efficiency levels, but it also reduces board space usage and lowers the overall bill-of-materials (BOM) costs.

The product’s spread spectrum modulation (SSM) results in more effective electromagnetic interference (EMI) suppression across a broad range of frequencies. This allows the use of inexpensive ferrite bead filters, rather than more costly and bulky LC filters. The boost converter’s ultrasonic PFM operation minimizes the impact of audible noise emanating from other components situated on the PCB. In addition, Class-D and boost SSM switching is synchronized to avoid beats (more info).

PAM8965 (jpg)

Where to next?

Témata rubriky

Our partners

eipc
epci
imaps
ryston-logo-RGB-web
mikrozone
mcu
projectik