Showing posts with label create. Show all posts
Showing posts with label create. Show all posts
Tuesday, October 14, 2014
LM4765 create 2 x 30 watt amplifier
A very simple 2 x 30 watt amplifier electronic circuit project can be designed using the LM4765 stereo audio amplifier IC capable of delivering typically 30W per channel of continuous average output power into an 8Ω load with less than 0.1% THD+N.
This 2 x 30 watt amplifier electronic circuit is very simple and require few external electronic parts and can be used in high end stereo TVs or some other audio applications .
Each amplifier has an independent smooth transition fadein/out mute and a power conserving standby mode which can be controlled by external logic.
Like many other audio amplifier ICs the LM4765 has many features like Temperature protection circuitry, SPiKe protection ( means that these parts are safeguarded at the output against overvoltage, undervoltage, overloads, including thermal runaway and instantaneous temperature peaks).
This audio amplifier electronic circuit project can be powered from a wide input voltage range from 20 volt up to 66 volts , but typically is required a dual 28 volts input ( take care because |Vcc|+|Vee|<60 volts .
The LM4765 has a sophisticated thermal protection scheme to prevent long-term thermal stress of the device. When the temperature on the die reaches 165°C, the LM4765 shuts down. It starts operating again when the die temperature drops to about 155°C, but if the temperature again begins to rise, shutdown will occur again at 165°C.
The audio IC must be mounted on a heat sink to keep the die temperature at a level such that the thermal protection circuitry does not operate under normal circumstances.
In this circuit diagram is represented just a part of the IC (one channel ) and numbers in parentheses represent pinout for amplifier B.
This 2 x 30 watt amplifier electronic circuit is very simple and require few external electronic parts and can be used in high end stereo TVs or some other audio applications .
Each amplifier has an independent smooth transition fadein/out mute and a power conserving standby mode which can be controlled by external logic.
Like many other audio amplifier ICs the LM4765 has many features like Temperature protection circuitry, SPiKe protection ( means that these parts are safeguarded at the output against overvoltage, undervoltage, overloads, including thermal runaway and instantaneous temperature peaks).
This audio amplifier electronic circuit project can be powered from a wide input voltage range from 20 volt up to 66 volts , but typically is required a dual 28 volts input ( take care because |Vcc|+|Vee|<60 volts .
The LM4765 has a sophisticated thermal protection scheme to prevent long-term thermal stress of the device. When the temperature on the die reaches 165°C, the LM4765 shuts down. It starts operating again when the die temperature drops to about 155°C, but if the temperature again begins to rise, shutdown will occur again at 165°C.
The audio IC must be mounted on a heat sink to keep the die temperature at a level such that the thermal protection circuitry does not operate under normal circumstances.
In this circuit diagram is represented just a part of the IC (one channel ) and numbers in parentheses represent pinout for amplifier B.
Monday, September 22, 2014
Create natural sound using ic MM5837
Normal voice we hear is from frequencies that are a combination of both high frequency and low frequency. Signal strength is not equal, will result in a different voice.
Operation of the circuit. When the power supply to IC1 by IC1 will work out the frequency produced by the pin 13 pin 3 is press the switch on left off. C to a value that will be connected to each circuit by the C makes the sound different.
Of the signal from pin 3 of IC1 is through R1 and VR1 is responsible for adjusting the strength of the signal will be expanded to IC2, which IC2 is IC amplifier with growing 1W signal that originates in the leg 5. The high frequency. And noise will be R3, C8 filter to ground the remaining signal is Retail Oil Link to C9 on the speakers.
Thursday, September 11, 2014
How to create a simple adjusting volume for amplifier
This circuit usually used for amplifier that do not require additional device in one box amplifiers. Enhancements such as Equalizer , Tone Control , Mixer , etc. Only by requiring a potentiometer mono or stereo if stereo power amplifier , and few cables you can make this circuit easily.
See picture below :
First connect the cable from the power amplifier input to pin2 potentio , and connect ground to pin 1 , then connect the output of tuner or other media player to pin 3. Try turning to the right then the sound will be high , and if played left back then the sound will below.
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