NS公司的LME49600高保真耳机放大器是可提供高性能低失真250mA的音频缓冲器。它的低失真（THD+N）可达0.00003%，转换速率高达2000V/μs，典型带宽可达180MHz，可用作耳机放大器输出级，线路驱动器，低功率音频放大器，大电流运放输出级以及电源稳压器。本文介绍了LME49600的主要指标和特性，功能方框图，用作音频缓冲器的电路图，以及耳机放大器电路图。此外，还介绍了LME49600评估板电路图和材料清单（BOM）。

LME49600 High Performance, High Fidelity, High Current Audio Buffer The LME49600 is a high performance, low distortion high fidelity 250mA audio buffer. The LME49600 is designed for a wide range of applications. It can be used inside the feedback loop of op amps.
The LME49600 offers a pin-selectable bandwidth: a low current, 110MHz bandwidth mode that consumes 7.3mA and a wide 180MHz bandwidth mode that consumes 13.2mA. In both modes the LME49600 has a nominal 2000V/μs slew rate. Bandwidth is easily adjusted by either leaving the BW pin unconnected or connecting a resistor between the BW pin and the VEE pin.

The LME49600 is fully protected through internal current limit and thermal shutdown.

LME49600主要指标：
■Low THD+N (VOUT = 3VRMS, f = 1kHz, Figure 2) 0.00003% (typ)
■Slew Rate 2000V/μs (typ)
■High Output Current 250mA (typ)
■Bandwidth
BW pin floating 110MHz (typ)
BW connected to VEE 180MHz (typ)
■Supply Voltage Range ±2.25V ≤ VS ≤ ±18V
LME49600主要特性：
■Pin-selectable bandwidth and quiescent current
■Pure fidelity. Pure performance
■Short circuit protection
■Thermal shutdown
■TO–263 surface-mount package
应用：
■Headphone amplifier output drive stage
■Line drivers
■Low power audio amplifiers
■High-current operational amplifier output stage
■ATE Pin Driver Buffer
■Power supply regulator

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