This document is about SSM2317. SSM2317 is a Filterless High Efficiency Mono 3 W Class-D Audio Amplifier with Automatic Level Control (ALC) function, which can improve dynamic range and prevent distortion. Its maximum output power is 3 W, and its working voltage range is 2.5 V to 5.5 V.
The SSM2317 is a fully integrated, filter‑less Class‑D audio amplifier designed for mobile phone, MP3 player and portable gaming applications. It operates from a single 2.5 V to 5.5 V supply and can deliver up to 3 W continuous output into a 3 Ω load while maintaining <10 % THD+N.
Key features include automatic level control (ALC), pop‑and‑click suppression, a fixed 18 dB gain (adjustable with external resistors), ultra‑low shutdown current (20 nA), and built‑in short‑circuit and thermal protection. The device is offered in a 9‑ball wafer‑level chip‑scale package (WLCSP).
| Output Power (3 Ω load) | 3 W |
|---|---|
| Typical Shutdown Current | 20 nA |
| Default Gain | 18 dB |
The shutdown current is typically 20 nA.
The default gain is fixed at 18 dB, but it can be reduced with external resistors.