The NS48305.3W is a mono AB/D class audio power amplifier with integrated adaptive ChargePump and up to 5.3 W output.
The NS48305.3W audio power amplifier integrates an adaptive ChargePump boost module and supports AB/D class mode switching via a control pin. It delivers up to 5.3 W into a 4 Ω load at 4.2 V supply, with efficiency around 80 % in Class D mode.
The device is supplied in an eSOP‑10 package, operates from 2.7 V to 5.5 V, and includes built‑in over‑temperature protection, shutdown current below 1 µA, and a fixed internal gain of 24×. Recommended applications include Bluetooth speakers, portable amplifiers, and other low‑voltage audio systems. This manual is written in Chinese.
| Output Power (Class D, VBAT=4.2 V, RL=4 Ω) | 5.3 W |
|---|---|
| Recommended Operating Voltage | 2.7 V – 5.5 V |
| Shutdown Current | <1 µA |
| Standby Current | 4.5 mA |
| Package | eSOP‑10 |
| Operating Temperature Range | -40 °C – 85 °C |
| Fixed Internal Gain | 24× |
| ChargePump Output Voltage | 6.5 V |
| ChargePump Maximum Output Current | 1.8 A |
The recommended operating voltage range is 2.7 V to 5.5 V.
The mode is selected by setting the level of the CTRL pin: low level for shutdown, 0.8‑1.3 V for Class AB, and 1.8‑VDD for Class D.
Yes, it has built‑in over‑temperature protection that shuts the chip down when the temperature exceeds the limit.