LM4910  Product Folder

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 32 load with less than 1% distortion (THD+N) from a 3.3V_DC power supply.

The LM4910 utilizes a new circuit topology that eliminates output coupling capacitors and half-supply bypass capacitors (patent pending). 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 bypass capacitors, or bootstrap capacitors, it is ideally suited for low-power portable applications where minimal space and power consumption are primary requirements.

The LM4910 features a low-power consumption shutdown mode, activated by driving the shutdown pin with logic low. Additionally, the LM4910 features an internal thermal shutdown protection mechanism. The LM4910 is also unity-gain stable and can be configured by external gain-setting resistors.

• Eliminates headphone amplifier output coupling capacitors (patent pending)
• Eliminates half-supply bypass capacitor (patent pending)
• 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

• Mobile Phones
• PDAs
• Portable eletronics devices
• Portable MP3 players