TILM4871MM/NOPB
Overview
The LM4871 is a mono Bridge-Tied Load (BTL) audio power amplifier designed to deliver high-quality output power with minimal external components. It is capable of delivering 3W of continuous average power into a 3 Ohm load with less than 10% THD+N from a 5V DC supply. This Class AB amplifier features a low-power consumption shutdown mode and internal thermal shutdown protection.
Why Choose This Part
The LM4871 eliminates the need for bulky output coupling capacitors, bootstrap capacitors, or snubber circuits, which significantly reduces the overall BOM cost and PCB footprint. It is unity-gain stable and allows for external gain configuration to match specific application requirements while maintaining a low shutdown current of 0.6uA.
Applications
Key Specifications
Getting Started
To implement the LM4871, provide a stable 2V to 5.5V supply and configure the external gain using two resistors. Ensure the shutdown pin (Pin 1) is driven high to enable the device or low to enter the ultra-low current state. Layout designers should place the supply bypass capacitor as close to the VDD pin as possible to minimize noise.
