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PDF NS4150 Data sheet ( Hoja de datos )
| Número de pieza | NS4150 | |
| Descripción | 3W mono Class-D audio amplifier | |
| Fabricantes | Nsiway | |
| Logotipo |  |
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NS4150
Low EMI,Filterless,3W Mono Class D Audio Amplifier
NS4150 Data Sheet V1.0
Nsiway
ShenZhen Nsiway Technology Co., Ltd
2011,05
1
1 page  
NS4150
Low EMI,Filterless,3W Mono Class D Audio Amplifier
General Description
The NS4150 is a,Low EMI,Filterless,3W Mono Class D Audio Amplifier. The NS4150 original Enhanced
Emission Elimination which reduces EMI-radiated emissions. Filterless Amplifier Passes FCC Radiated
Emissions Standards with 100mm of Cable.
The NS4150 has the power-down function which can minimize the power consumption in the standby
state.As for protection function, overcurrent protection function for speaker output terminal, overtemperatue
protection function for inside of the device, and low supply voltage malfunction preventing function are
prepared. while offering efficiencies above 90%. A patented, low-EMI modulation scheme renders the
traditional class D output filter unnecessary, conserving board space.
The NS4150 is available in MSOP-8 and SOP-8 package and is specified over the -40℃ to +85℃
temperature range.
Features
Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions
Power Output at 5.0V, 4Ω ：3W (typ)
0.1%THD（0.5W、3.6V）
Filterless Class D
90% Efficiency
High PSRR (80dB at 217Hz)
3.0-mA Quiescent Current(VDD=3.6V, No load)
3.0- 5.25V operation
Over-current, Thermal and Low voltage Malfunction Protection function
Packages: MSOP-8 and SOP-8
Applications
Cellular Handsets
Digital Camera
PDAs
Portable Information Appliances(MP3/MP4/DFP/Portable DVD)
Typical Application Circuit
0.1uF 30K
0.1uF 30K
VDD
1uF
1uF
INP
VDD
INN Nsiway VON
NS4150 VOP
CTRL
Bypass
GND
Figure1.NS4150 Typical Application Circuit
Nsiway
5
5 Page 
NS4150
Low EMI,Filterless,3W Mono Class D Audio Amplifier
SUPPLY CURRENT vs SUPPLY VOLTAGE
14
12
10
8 No Load
RL=4Ω
6 RL=8Ω
4
2
0
2.5
3 3.5 4 4.5 5
Supply Voltage(V)
5.5
Application Information
Block Diagram
Figure3.The block diagram of NS4150
Digital Amplifier Function
The NS4150 has digital amplifiers with analog input, PWM pulse output, and maximum output of
3W(RL=4Ω)×1ch.Distortion of PWM pulse output signal and noise of the signal is reduced by adopting “Pure
Pulse Direct Speaker Drive Circuit”.
In addition, NS4150 has been designed so that high-efficiency can be maintained within an average power
range (100mW or so) that is used for mobile terminal.
Pop noise reduction function
The Pop Noise Reduction Function works in the cases of Power-on, Power-off, Power-down on, and
Power-down off.And, the pop-noise can be suppressed according to control the power down by the following
procedure.
・Power down mode is cancelled after power-on and the power supply is stabilized enough.
・Power down mode is set before Power-off.
Nsiway
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NS4150.PDF ] | |
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