The Nsiway NNSS44115500 is a 3 W single‑channel Class‑D audio power amplifier with ultra‑low EMI and no output filter, detailed in this user manual.
The NNSS44115500 (NS4150) is a Class‑D audio power amplifier designed for ultra‑low EMI operation without the need for an external output filter. It delivers up to 3 W into a 4 Ω load from a 5 V supply, achieves up to 90 % efficiency, and includes built‑in over‑current, over‑temperature, and undervoltage protection.
Typical applications include MP3/PMP players, mini speakers, and digital photo frames. The manual provides functional descriptions, pin assignments for MSOP‑8 and SOP‑8 packages, electrical specifications, and guidance on layout, decoupling, and optional external components such as inductors and capacitors for optimal performance. This manual is written in Chinese.
| Maximum Output Power | 3 W (5 V supply, 4 Ω load) |
|---|---|
| Efficiency | up to 90 % |
| Supply Voltage Range | 3.0 V ~ 5.25 V |
| Operating Temperature Range | -40 °C ~ 85 °C |
| Static Current (No Load) | 3 mA (3.6 V supply) |
| Protection Features | Over‑current, over‑temperature, undervoltage protection |
It can deliver up to 3 W into a 4 Ω load when powered from a 5 V supply.
No, the device uses a filter‑less PWM modulation structure that eliminates the need for an external LC filter.
The chip includes over‑current, over‑temperature, and undervoltage protection circuits.
It operates from 3.0 V up to 5.25 V.