The SSM2301 is a fully integrated, high efficiency, Class-D audio amplifier with Σ-Δ modulation, which supports single supply operation from 2.5 V to 5.0 V and provides 20nA ultralow shutdown current. It is suitable for use in mobile phones, MP3 players, portable gaming devices, portable electronics and educational toys.
The SSM2301 is a fully integrated, high‑efficiency Class‑D audio amplifier designed for mobile phone and portable electronics applications. It operates from a single 2.5 V to 5.0 V supply and delivers up to 1.4 W continuous output into an 8 Ω load with less than 1 % THD+N.
Key features include filter‑less operation, built‑in pop‑and‑click suppression, selectable 6 dB or 12 dB gain, ultra‑low shutdown current, and robust short‑circuit and thermal protection. The datasheet provides pin configurations, typical performance curves, layout recommendations and an ordering guide for both LFCSP and MSOP packages.
| Output Power (typical) | 1.22 W |
|---|---|
| Efficiency at 1.4 W | 85 % |
| THD+N (typical) | 0.1 % |
| Shutdown Current | 20 nA |
| Gain Options | 6 dB or 12 dB |
| Signal‑to‑Noise Ratio | >98 dB |
| Power‑Supply Rejection Ratio | 63 dB at 217 Hz |
The device has an ultra‑low shutdown current of 20 nA.
Gain can be selected as either 6 dB or 12 dB using the GAIN pin.
It achieves 85 % efficiency when delivering 1.4 W into an 8 Ω load at 5 V.