Part LM49100
Description Mono Class AB Audio Subsystem
Manufacturer National Semiconductor
Size 2.07 MB
National Semiconductor
LM49100

Overview

The LM49100 is a fully integrated audio subsystem capable of delivering 1.275W of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and with a 5V power supply. The LM49100 also has a stereo true-ground headphone amplifier capable of 50mW per channel of continuous average power into a 32Ω single-ended (SE) loads with 1% THD+N.

  • Power Output at VDD = 5V: Speaker: RL = 8Ω, THD+N ≤ 1% Headphone (VDDHP = 2.8V): RL = 32Ω, THD+N ≤ 1%
  • Shutdown current
  • 275W 50mW 0.01µA Features * * * * * * * * * * *
  • Mono and stereo inputs Thermal Overload Protection True-ground Headphone Drivers I2C Control Interface Input mute attenuation 2nd Stage headphone attenuator 32-step digital volume control 10 Operating Modes Minimum external components Click and Pop suppression Micro-power shutdown Available in space-saving 3mm x 3mm 25 bump GR package
  • RF Suppression