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 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.
●## Key Specifications
●PSRR at f = 217Hz
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●65dB (typ)
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●Power Output at VDD = 3.3V, RL = 32Ω, and THD ≤ 1%
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●35mW (typ)
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●Shutdown Current
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●0.1µA (typ)
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● 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
