Overview
The LM4861MX/NOPB is a 1.1W audio power amplifier produced by Texas Instruments. This monaural, Class-AB amplifier is designed to deliver high-quality audio output with minimal external components. It is particularly suited for low-power portable systems and applications where space and component count are critical. The amplifier operates from a 2.0V to 5.5V power supply and can drive an 8Ω load with 1% THD+N, making it a versatile choice for various audio applications.
Key Specifications
| Parameter | Conditions | Typical | Limit |
|---|---|---|---|
| Supply Voltage (VDD) | 2.0 V to 5.5 V | 2.0 V (min), 5.5 V (max) | |
| Output Power | 8Ω load, 1% THD+N | 1.1 W | |
| Quiescent Power Supply Current (IDD) | VIN = 0V, IO = 0A | 6.5 mA | 10.0 mA (max) |
| Shutdown Current (ISD) | 0.5 μA (typ) | ||
| Operating Temperature Range | −40°C to +85°C | ||
| Package Type | SOIC (D) with 8 pins | ||
| Thermal Resistance (θJA) | 107°C/W (typ) for N08E package |
Key Features
- No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary.
- Externally controlled shutdown mode.
- Thermal shutdown protection circuitry.
- Unity-gain stable.
- External gain configuration capability.
- Small Outline (SOIC) packaging.
- Compatible with PC power supplies.
Applications
- Personal computers.
- Low-power portable systems.
- Audio equipment requiring compact and efficient amplification.
- Consumer electronics where high-quality audio output is necessary.
Q & A
- What is the maximum output power of the LM4861MX/NOPB?
The LM4861MX/NOPB can deliver up to 1.1W of continuous average power to an 8Ω load with 1% THD+N. - What is the operating voltage range of the LM4861MX/NOPB?
The operating voltage range is from 2.0V to 5.5V. - Does the LM4861MX/NOPB require external coupling capacitors or snubber circuits?
No, the LM4861MX/NOPB does not require output coupling capacitors, bootstrap capacitors, or snubber circuits. - What is the typical quiescent power supply current of the LM4861MX/NOPB?
The typical quiescent power supply current is 6.5 mA. - What is the thermal shutdown protection feature of the LM4861MX/NOPB?
The LM4861MX/NOPB includes thermal shutdown protection circuitry to prevent overheating. - In what package type is the LM4861MX/NOPB available?
The LM4861MX/NOPB is available in a Small Outline (SOIC) package with 8 pins. - What is the operating temperature range of the LM4861MX/NOPB?
The operating temperature range is from −40°C to +85°C. - Is the LM4861MX/NOPB compatible with PC power supplies?
Yes, the LM4861MX/NOPB is compatible with PC power supplies. - What are some common applications of the LM4861MX/NOPB?
Common applications include personal computers, low-power portable systems, and consumer electronics requiring high-quality audio output. - Does the LM4861MX/NOPB have an externally controlled shutdown mode?
Yes, the LM4861MX/NOPB features an externally controlled shutdown mode.
