1 Watt Fully Differential Audio Power Amplifier With Shutdown Select The LM4894IBP is a power amplifier manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** National Semiconductor (NSC)
- **Type:** Audio Power Amplifier
- **Output Power:** 1.1W per channel into 8Ω (at 5V supply)
- **Supply Voltage Range:** 2.2V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 20-pin PDIP (Plastic Dual In-line Package)
- **THD+N (Total Harmonic Distortion + Noise):** 0.2% (typical at 1kHz, 1W into 8Ω)
- **Shutdown Current:** 0.01μA (typical)
- **Quiescent Current:** 4mA (typical)
- **Gain:** Fixed internally at 6dB
### **Descriptions:**
- The LM4894IBP is a dual bridge-tied load (BTL) audio power amplifier designed for portable applications.
- It is optimized for driving speakers in a small form factor with low power consumption.
- The device includes an internal thermal shutdown protection mechanism.
### **Features:**
- **Dual BTL Outputs:** Allows driving speakers without external coupling capacitors.
- **Low Quiescent Current:** Enhances battery life in portable devices.
- **Thermal Shutdown Protection:** Prevents damage from overheating.
- **Minimal External Components:** Simplifies design and reduces PCB space.
- **Improved PSRR (Power Supply Rejection Ratio):** Reduces noise from power supply variations.
- **Pop-and-Click Suppression:** Minimizes audible noise during power-up/down.
This information is strictly factual from Ic-phoenix technical data files. Let me know if you need further details.
