Which IC is used for generation of PWM?

Which IC is used for generation of PWM?

555 timer IC
Here we are using a 555 timer IC for generating PWM. 555 Timer IC is a very useful and general purpose IC which can be used in many applications.

How can we generate PWM?

One of the simplest methods of generating a PWM signal is to compare two control signals, a carrier signal and a modulation signal. This is known as carrier-based PWM. The carrier signal is a high frequency (switching frequency) triangular waveform. The modulation signal can be any shape.

Which IC used in SMPS?

The VIPER22A is a Popular SMPS controller IC form STMicroelectronics that has been extensively used in AC to DC Converters in offline power circuit designs. This controller IC consists of an in-built PWM controller with a power MOSFET.

How does PWM control voltage?

Driving a cooling fan motor with PWM causes the motor to respond to the average of the pulses. In this way, PWM mimics the linear control obtained through varying a voltage that changes over time. The average voltage equals duty cycle multiplied by the maximum voltage applied to the motor.

How can we generate PWM signal using 8051 microcontroller?

The basic idea behind PWM implementation on 8051 is using timers and switching port pin high/low at defined intervals. As we have discussed in the introduction of PWM that by changing the Ton time, we can vary the width of square wave keeping same time period of the square wave. We will be using 8051 Timer0 in Mode 0.

Which timer is used for PWM as clock source?

We will use the simplest timer, TIMER0 for PWM generation. So we have an 8 bit counter counting from 0 to 255 and then resetting to 0 and so on.

What is Viper 22a?

VIPER22A is a switched-mode power supply controller IC introduced by STMicroelectronics. The device converts Analog voltage to the required regulated DC level for different purposes by switching techniques. This IC comes with a PWM Controller and a powerful MOSFET. It is used mainly in transformerless circuits.

What is PWM in 8051?

PWM in simple words changes the output voltage on a specified pin on which it is applied by varying the duty cycle of output wave form. Frequency and duty cycle of PWM signal can easily be varied using timers of 8051 microcontroller. Figure below will clear you about PWM signals and duty cycle.

How a PWM signal from a microcontroller can be used to control the speed of a motor?

As its name suggests, pulse width modulation speed control works by driving the motor with a series of “ON-OFF” pulses and varying the duty cycle, the fraction of time that the output voltage is “ON” compared to when it is “OFF”, of the pulses while keeping the frequency constant.