General Description:
Features
Applications
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 capaci-tors (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 capaci-tors, or bootstrap capacitors, it is ideally suited for low-power tors, or bootstrap capacitors, it is ideally suited for low-power sumption are primary requirements. Amplifier circuit
Features
- 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 and SOIC packages
Applications
- Mobile Phones
- PDAs
- Portable eletronics devices
- Portable MP3 players
Circuit diagram:
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| Stereo headphone amplifier |
