1 Watt Audio Power Amplifier The LM4890IBPX is a manufacturer by National Semiconductor (NSC). Below are its specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** National Semiconductor (NSC)
- **Type:** Audio Power Amplifier
- **Output Power:** 1.1W (into 8Ω at 5V)
- **Supply Voltage Range:** 2.7V to 5.5V
- **Quiescent Current:** 2.6mA (typical)
- **Shutdown Current:** 0.01μA (typical)
- **THD+N (Total Harmonic Distortion + Noise):** 0.2% (typical at 1kHz, 1W into 8Ω)
- **PSRR (Power Supply Rejection Ratio):** 70dB (typical)
- **Package:** 20-pin LLP (Leadless Leadframe Package)
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The LM4890IBPX is a mono, bridged audio power amplifier designed for portable applications. It operates from a single supply and features an integrated shutdown mode to minimize power consumption. The device is optimized for driving speakers with low distortion and noise.
### **Features:**
- **Bridge-Tied Load (BTL) Configuration** – Eliminates the need for output coupling capacitors.
- **Low Quiescent Current** – Enhances battery life in portable devices.
- **Shutdown Mode** – Reduces power consumption when not in use.
- **Improved PSRR** – Minimizes noise from power supply variations.
- **Thermal Shutdown Protection** – Prevents damage from excessive heat.
- **Space-Saving LLP Package** – Suitable for compact PCB designs.
This information is based on the manufacturer's datasheet.
