Overview
The LM4871MX/NOPB is a mono bridged audio power amplifier designed and manufactured by Texas Instruments. This amplifier is capable of delivering 3W of continuous average power into a 3Ω load with less than 10% Total Harmonic Distortion (THD) when powered by a 5V power supply. It is part of the Boomer audio power amplifier series, which is known for providing high power, high fidelity audio output with minimal external components and low supply voltages ranging from 2.0V to 5.5V.
Key Specifications
| Parameter | Conditions | Units | Min | Typical | Max |
|---|---|---|---|---|---|
| PO at 10% THD+N, 1kHz | LM4871LD: 3Ω, 4Ω Loads | W | - | 3 | - |
| PO at 10% THD+N, 1kHz | Other Packages: 8Ω Load | W | - | 1.5 | - |
| Shutdown Current | VPIN1 = VDD | µA | 0.6 | 2 | - |
| Supply Voltage Range | - | V | 2.0 | - | 5.5 |
| THD at 1kHz at 1W Continuous Average Output Power into 8Ω | - | % | - | - | 0.5 |
| Operating Temperature Range | - | °C | -40 | - | 85 |
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) for power conservation in portable applications.
- Thermal shutdown protection.
Applications
- Portable computers.[/li]
- Desktop computers.[/li]
- Low voltage audio systems.[/li]
Q & A
- What is the maximum power output of the LM4871MX/NOPB into a 3Ω load?
The LM4871MX/NOPB can deliver up to 3W of continuous average power into a 3Ω load with less than 10% THD.
- What is the supply voltage range for the LM4871MX/NOPB?
The supply voltage range is from 2.0V to 5.5V.
- Does the LM4871MX/NOPB require output coupling capacitors or snubber circuits?
No, the LM4871MX/NOPB does not require output coupling capacitors, bootstrap capacitors, or snubber circuits.
- What is the shutdown current of the LM4871MX/NOPB?
The shutdown current is typically 0.6µA when the shutdown mode is activated.
- What are the available package types for the LM4871MX/NOPB?
The LM4871MX/NOPB is available in WSON, VSSOP, SOIC, or PDIP packaging.
- Is the LM4871MX/NOPB pin compatible with other models?
Yes, it is pin compatible with the LM4861.
- What is the operating temperature range of the LM4871MX/NOPB?
The operating temperature range is from -40°C to 85°C.
- Does the LM4871MX/NOPB have thermal shutdown protection?
Yes, it includes thermal shutdown protection.
- What is the typical THD at 1kHz for a 1W output into an 8Ω load?
The typical THD at 1kHz for a 1W output into an 8Ω load is 0.5% maximum.
- What are some common applications for the LM4871MX/NOPB?
Common applications include portable computers, desktop computers, and low voltage audio systems.[/p>
