NCP2809ADMR2 ,NOCAP 135 mW Stereo Headphone Power Amplifier3NCP2809 SeriesPIN FUNCTION DESCRIPTIONPin Type Symbol Description1 I IN_R Negative input of the se ..
NCP2809ADMR2 ,NOCAP 135 mW Stereo Headphone Power AmplifierFeaturesW = Work Week• Pb−Free Package is Available• 135 mW to a 16 Load from a 5.0 V Power Suppl ..
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NCP2809ADMR2
NOCAP 135 mW Stereo Headphone Power Amplifier
NCP2809 Series
NOCAP� 135 mW Stereo
Headphone Power Amplifier
The NCP2809 is a cost−effective stereo audio power amplifier
capable of delivering 135 mW of continuous average power per
channel into 16 � loads.
The NCP2809 audio power amplifier is specifically designed to
provide high quality output power from low supply voltage,
requiring very few external components. Since NCP2809 does not
require bootstrap capacitors or snubber networks, it is optimally
suited for low−power portable systems. NCP2809A has an internal
gain of 0 dB while specific external gain can externally be set with
NCP2809B.
If the application allows it, the virtual ground provided by the
device can be connected to the middle point of the headset (Figure 1).
In such case, the two external heavy coupling capacitors typically
used can be removed. Otherwise, you can also use both outputs in
single ended mode with external coupling capacitors (Figure 43).
Due to its excellent Power Supply Rejection Ratio (PSRR), it can
be directly connected to the battery, saving the use of an LDO.
Features Pb−Free Package is Available 135 mW to a 16 � Load from a 5.0 V Power Supply Excellent PSRR (85 dB Typical): Direct Connection to the Battery “Pop and Click” Noise Protection Circuit Ultra Low Current Shutdown Mode 2.2 V–5.5 V Operation Outstanding Total Harmonics Distortion + Noise (THD+N): Less
than 0.01% External Turn−on and Turn−off Configuration Capability Thermal Overload Protection Circuitry
Typical Applications Cellular Phone Portable Stereo MP3 Player Personal and Notebook Computers
