This document describes a filterless high efficiency mono 1.4W class-D audio amplifier with built-in output stage. The amplifier provides 1.4W into 8Ω speaker at 5.0V supply with less than 1% THD and achieves 85% efficiency. It has a signal-to-noise ratio better than 98dB and operates on a single supply from 2.5V to 5.0V. The amplifier features ultralow shutdown current of 20nA and provides short-circuit and thermal protection. It is suitable for applications such as mobile phones, MP3 players, portable gaming devices, and educational toys.
The SSM2301 is a fully integrated, high-efficiency Class-D audio amplifier designed for mobile phone applications. It features a filterless output stage, allowing for a minimum of external components while driving an 8Ω load from a single 2.5V to 5.0V supply. The device delivers 1.4W of continuous output power with less than 1% THD + N at 5.0V.
| Output Power | 1.4 W into 8Ω at 5.0V |
|---|---|
| Efficiency | 85% |
| Signal-to-Noise Ratio | Better than 98 dB |
| Supply Voltage Range | 2.5 V to 5.0 V |
| Shutdown Current | 20 nA |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 8-lead LFCSP |
No, it is a filterless Class-D amplifier with a built-in output stage.
The maximum shutdown current is 20 nA.
The gain can be set to 6 dB or 12 dB using the gain control select pin.