NS4150B 3W Mono Digital Audio Amplifier SMD IC MSOP8

Description

NS4150B 3W Mono Digital Audio Amplifier SMD IC MSOP8

Product Description

The NS4150B is a mono Class-D audio amplifier IC in an MSOP-8 (or narrow SOP / SMD) package. It’s optimized for low electromagnetic interference (low EMI) and filterless operation, meaning it doesn’t require external output LC filtering in many cases. It is designed to drive a single speaker (4 Ω) with high efficiency, making it suitable for compact audio systems, battery-powered devices, and low-power sound output applications.

Key Features

• Supply voltage range: 3.0 V to 5.0 V

• Output power: ~ 2.8 W into 4 Ω at 5 V (with ~10 % THD)

• Very low distortion (for example, ~0.1 % THD at 0.5 W, 3.6 V)

• Efficiency: up to ~88 % in typical conditions

• Filterless operation (no external LC filter required)

• Low electromagnetic interference (EMI suppression built-in)

• High power-supply rejection ratio (PSRR), e.g. ~80 dB at 217 Hz

• Protection features: over-current protection, thermal shutdown, etc.

• Low quiescent / standby current

• Package: MSOP-8 (surface mount)

Applications

• Portable / battery-powered speakers

• Bluetooth audio modules

• TVs, set-top boxes, and multimedia playback devices

• Sound output for toys, alarms, IoT devices

• Embedded systems needing compact audio output

• Low-power / efficient audio amplification in space-constrained designs