What is a PWM switching power supply?
PWM (Pulse Width Modulated) power supplies are a type of switching power supply. Pulse Width Modulation is generally used to help regulate the voltage in a switching power supply. This is necessary when the current demand on the power supply or the charging system’s supply voltage is not constant.
Which IC is used for designing the adjustable voltage regulator?
Depending on the range of voltage to be adjusted, there are many types of adjustable voltage regulators. Two of the most commonly used IC’s are the LM317 and LM117. Given below is the diagram of a 1.2 V to 25 Volts adjustable voltage regulator circuit using LM117 IC.
How does a switch mode power supply work?
Through the control of transistors operating as switches (on or off) with energy storage components such as inductors and capacitors, a switch mode power supply transfers just enough energy from the input to the output to achieve the desired output voltage and currents. Why Switch Mode Power Supplies?
What are the pins on a PWM controller?
Pin Configuration Pin Number Pin Name Description 5 Ground Connected to the ground of the circuit 6 Output This pin outputs the PWM signal based on 7 Vcc Supply voltage for the IC (Nominal 11V) 8 VREF Reference voltage based on which the PWM
Which is the output pin of an IC?
It is an output pin which outputs low impedance 1MHz single based in the difference between he set and current voltage. It is normally connected to the voltage feedback pin of the IC through resistor and capacitor. It is an input to the error amplifier that inside the IC. The difference in voltage level is supplied to this pin
What are the different types of switching regulators?
There are two main types of control for switching regulators: pulse width modulation (PWM) and hysteretic. What is a PWM switching regulator? In a PWM switching regulator ( Figure 1 ), the input voltage is fed back to a PWM controller that varies the length of time the power switch is on (duty cycle) to keep the output voltage constant.