Overview
The LM4871MMX/NOPB, produced by Texas Instruments, is a 3W mono bridged audio power amplifier designed for high-power, high-fidelity audio output. This Class-AB amplifier is part of the Boomer audio power amplifier series, which is optimized for low-power portable applications. It operates on low supply voltages ranging from 2.0V to 5.5V and requires few external components, making it ideal for systems that need minimal volume and weight.
Key Specifications
| Parameter | Conditions | Typical Value | Units |
|---|---|---|---|
| Output Power at 10% THD+N, 1kHz | LM4871LD, 3Ω Load | 3W | W |
| Output Power at 10% THD+N, 1kHz | LM4871LD, 4Ω Load | 2.5W | W |
| Output Power at 10% THD+N, 1kHz | All other LM4871 Packages, 8Ω Load | 1.5W | W |
| Shutdown Current | VPIN1 = VDD | 0.6µA | µA |
| Supply Voltage Range | 2.0V to 5.5V | V | |
| THD at 1kHz at 1W Continuous Average Output Power into 8Ω | 0.5% (max) | % | |
| Power Supply Rejection Ratio (PSRR) | VDD = 4.9V to 5.1V | 60 dB | dB |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits Required
- Unity-gain Stable
- Available in WSON, VSSOP, SOIC, or PDIP Packaging
- External Gain Configuration Capability
- Pin Compatible with the LM4861
- Micropower Shutdown Mode (IQ = 0.6µA, typ)
- Thermal Shutdown Protection
Applications
- Portable Computers
- Desktop Computers
- Low Voltage Audio Systems
Q & A
- What is the typical output power of the LM4871LD into a 3Ω load at 10% THD+N?
The typical output power of the LM4871LD into a 3Ω load at 10% THD+N is 3W. - What is the shutdown current of the LM4871?
The shutdown current of the LM4871 is typically 0.6µA. - What is the supply voltage range for the LM4871?
The supply voltage range for the LM4871 is from 2.0V to 5.5V. - Is the LM4871 unity-gain stable?
Yes, the LM4871 is unity-gain stable. - What types of packaging are available for the LM4871?
The LM4871 is available in WSON, VSSOP, SOIC, or PDIP packaging. - Does the LM4871 require external gain configuration?
Yes, the LM4871 allows for external gain configuration. - What is the operating temperature range for the LM4871?
The operating temperature range for the LM4871 is -40°C to 85°C. - What is the power supply rejection ratio (PSRR) of the LM4871?
The power supply rejection ratio (PSRR) of the LM4871 is 60 dB. - Is the LM4871 pin compatible with the LM4861?
Yes, the LM4871 is pin compatible with the LM4861. - Does the LM4871 have thermal shutdown protection?
Yes, the LM4871 has thermal shutdown protection.
