The SSM2317 is a filterless high-efficiency 3W mono class-D audio amplifier. It features automatic level control (ALC) that improves dynamic range and prevents clipping. It can deliver 3W into a 3Ω load and 1.4W into an 8Ω load at 5.0V supply with less than 10% total harmonic distortion (ALC off). It can deliver 700mW into an 8Ω load at 4.2V supply (ALC 80%). It has an efficiency of 93% at 5.0V, 1.4W into an 8Ω speaker and a signal-to-noise ratio (SNR) of over 93dB. It supports single-supply operation from 2.5V to 5.5V. Additionally, it has an ultralow shutdown current of 20nA, short-circuit and thermal protection, a 9-ball 1.5mm x 1.5mm WLCSP package, pop-and-click suppression, and built-in resistors to reduce board component count.
The SSM2317 is a fully integrated, filterless Class‑D audio amplifier designed for mobile and portable electronics. It operates from a single 2.5 V to 5.5 V supply and delivers up to 3 W continuous output power with low distortion and high efficiency. Key features include automatic level control, built‑in pop‑and‑click suppression, and a typical shutdown current of only 20 nA.
Typical applications are mobile phones, MP3 players, portable gaming devices, and educational toys. The device is available in a 9‑ball, 1.5 mm × 1.5 mm WLCSP package and includes protection features such as short‑circuit and thermal shutdown.
| Supply Voltage Range | 2.5 V to 5.5 V |
|---|---|
| Closed‑Loop Gain | 18 dB |
The amplifier operates from 2.5 V up to 5.5 V.
The default closed‑loop gain is 18 dB.