LM49100

LM49100 www.ti.com SNAS392F – JUNE 2007 – REVISED MAY 2013 LM49100 Mono Class AB Audio Sub-System with a TrueGround Headphone Amplifier Check for Samples: LM49100 FEATURES 1 2 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 csBGA Package RF Suppression KEY SPECIFICATIONS Power Output at VDD = 5V: – Loudspeaker (LS): – RL = 8Ω, THD+N ≤: 1% 1.275W – Headphone (VDDHP = 2.8V): – RL = 32Ω, THD+N ≤ 1%: 50mW Shutdown current 0.01μA APPLICATIONS Mobile Phones PDAs Laptops Portable Electronics DESCRIPTION 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. The LM49100 has three input channels. One pair of SE inputs can be used with a stereo signal. The other input channel is fully differential and may be used with a mono input signal. The LM49100 features a 32-step digital volume control and ten distinct output modes. The mixer, volume control, and device mode select are ...