■Product overview
Ln4809 is a dual channel audio Headphone Power amplifier. Each channel can provide up to 105mW output power. Application circuit of ln4809
Simple, only a few peripheral devices are required; Stable operation, low power consumption, high gain bandwidth product, and internal thermal shutdown protection mechanism, convenient for application. Ln4809 is packaged with MSOP and SOP to save circuit area. It is very suitable for low-voltage and low-power applications such as mobile phones and various mobile devices.
■purpose
Mobile phone
Earphone amplifier
Microphone preamplifier
MP3 player
Personal mobile terminal PDA
Personal navigation equipment
Portable audio device
■Product features
Wide operating voltage range 2.0v-5.5v
High power supply voltage rejection ratio (PSRR) is up to 70dB at 217hz and 1kHz
Low leakage current in power down mode, typical value is 0.4 µ a
Good ability to suppress “crackling” sound during power on and power off
Noise + harmonic distortion (THD + n) <>
Noise and harmonic distortion (THD + n) <>
No bootstrap capacitor required
Unity gain stabilization
Small package, saving circuit area: MSOP, SOP
■encapsulation
MSOP
SOP
Reviewed and edited by: tangzihong