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LM48824 Class G Stereo Headphone Amplifier Chip

2014-11-20 00:42  
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The LM48824 is a Class G, ground-referenced stereo headphone amplifier designed for portable devices which draws only 0.9 mA (typical) of quiescent current to double the audio playback time of smart phones, full-featured mobile phones and portable music players.
The LM48824’s Stereo headphone amplifier (Class G architecture ) increases audio (MP3, mobile TV, etc.) playback time with its adaptive power supply approach that enables very low supply rails, which doubles the power-efficiency compared to typical Class AB headphone amplifiers.
A high output impedance mode allows the LM48824's outputs to be driven by an external source without degrading the signal.
The LM48824 is offered in an ultra-small, 16-bump, 1.7 mm by 1.7 mm, 0.4 mm-pitch micro SMD package.
Specifications of LM48824 are :
Quiescent Power Supply Current at 3.6V 0.9mA (typ) , Output Power/channel at VDD = 3.6V , RL = 16Ω, THD+N ≤ 1% 37mW (typ) , Output Power/channel at VDD = 3.6V , RL = 32Ω, THD+N ≤ 1% 29mW (typ) , PSRR at 217Hz 100dB (typ),Shutdown current 2.5μA (typ)
Main Features of LM48824 are : Class G Power Savings , Ground Referenced Headphone Outputs – Eliminates Output Coupling Capacitors , Common-Mode Sense , I2C Volume and Mode Control , High Output Impedance in Shutdown , Differential Inputs , Advanced Click-and-Pop Suppression , Low Supply Current , Low THD mode option .
lm48824 headphone amplifier circuit diagram

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