1.1 Watt Audio Power Amplifier 8-WSON -40 to 85 The LM4879SD/NOPB is a mono bridged audio power amplifier manufactured by National Semiconductor (NSC). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** National Semiconductor (NSC)
- **Type:** Mono Bridged Audio Power Amplifier
- **Package:** WSON-8 (SD)
- **Operating Voltage Range:** 2.7V to 5.5V
- **Output Power:**
- 1.1W (into 8Ω at 5V, THD+N = 10%)
- 1.4W (into 8Ω at 5V, THD+N = 1%)
- **Efficiency:** Up to 90% (depends on configuration)
- **THD+N (Total Harmonic Distortion + Noise):** 0.3% (typical at 1kHz, 1W into 8Ω)
- **Shutdown Current:** <1µA (typical)
- **Quiescent Current:** 3.5mA (typical)
- **Gain:** Internally fixed at 6dB
- **PSRR (Power Supply Rejection Ratio):** 60dB (typical at 217Hz)
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The LM4879SD/NOPB is a mono, bridge-tied load (BTL) audio amplifier designed for portable applications requiring high efficiency and minimal external components. It operates from a single supply and is optimized for driving speakers with low distortion and noise.
### **Features:**
- **Bridge-Tied Load (BTL) Configuration:** Eliminates the need for output coupling capacitors.
- **Low Power Consumption:** Efficient operation extends battery life in portable devices.
- **Thermal Shutdown Protection:** Prevents damage from overheating.
- **Click-and-Pop Suppression:** Minimizes audible noise during power-up/down.
- **Short-Circuit Protection:** Safeguards the device from output shorts.
- **Space-Saving Package:** WSON-8 (SD) package suitable for compact designs.
- **No External Compensation Required:** Simplifies circuit design.
This information is based solely on the manufacturer's datasheet and technical documentation.
