LM4910
www.ti.com SNAS151G – MAY 2004 – REVISED MARCH 2007 LM4910 Output Capacitor-less Stereo 35mW Headphone
Amplifier
Check for Samples: LM4910 FEATURES 1 2 Eliminates headphone amplifier output
coupling capacitors
Eliminates half-supply bypass capacitor
Advanced pop & click circuitry eliminates
noises during turn-on and turn-off
Ultra-low current shutdown mode
Unity-gain stable
2.2V -5.5V operation Available in space-saving MSOP, LLP, and
SOIC packages APPLICATIONS Mobile Phones
PDAs
Portable electronics devices
Portable MP3 players DESCRIPTION
The LM4910 is an audio power amplifier primarily designed for headphone applications in portable device
applications. It is capable of delivering 35mW of continuous average power to a 32Ω load with less than 1%
distortion (THD+N) from a 3.3VDC power supply.
The LM4910 utilizes a new circuit topology that eliminates output coupling capacitors and half-supply bypass
capacitors. The LM4910 contains advanced pop & click circuitry which eliminates noises caused by transients
that would otherwise occur during turn-on and turn-off.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal
amount of external components. Since the LM4910 does not require any output coupling capacitors, half-supply …
