How do you calculate inductor current in a buck converter?

How do you calculate inductor current in a buck converter?

When selecting an inductor for a buck converter the following parameters need to be defined:

  1. Maximum input voltage = Vin max.
  2. Minimum input voltage = Vin min.
  3. Maximum output current = Iout max.
  4. Operating frequency = f.
  5. Output voltage = Vout.
  6. Minimum output current = Iout min.

How do you calculate buck converter?

VIN = typical input voltage VOUT = desired output voltage fS = minimum switching frequency of the converter ΔIL = estimated inductor ripple current, see the following: The inductor ripple current cannot be calculated with Equation 1 because the inductor is not known.

What is inductor in buck converter?

Inductors in a Buck Converter The inductor and capacitor play a critical role in providing stable current to the load as the PWM signal switches. Finally, the duty cycle of the PWM signal is the primary function allowing the user to control the output voltage delivered to the load.

How do you calculate the input power of a buck converter?

Hence, if output power is 10 watts, the input power will be about 11 watts. If input voltage is 30 volts then the input current will be 10 watts / 30 volts = 333 mA.

How to calculate minimum inductance for buck converter?

Calculating Minimum Inductance: Inductor current ripple is defined as the peak to peak change in current during the on and off time. For the synchronous buck converter, the change in inductor current during the high side MOSFET Q1 on time is equal to the change during the MOSFET’s off time.

What is the peak current of a buck converter?

Let’s first understand the various parameters involved with a buck converter: Peak inductor current, ( ipk) = It’s the maximum amount of current that an inductor can store before getting saturated.

What is the circuit diagram for a buck converter?

For D=0, zero voltage appear across load while for D=1, all the input voltage appears across the load. That’s why buck converter is operated for D greater than 0 and less than 1. The basic circuit diagram of buck converter can be seen below.

Can a buck converter be used for low voltage?

Multiphase version of buck converters can provide high current with low voltage. Therefore, it can be used for low voltage high power applications. This article will discuss both low voltage low power converter and low voltage high power converter. The efficiency of the converter can be improved using synchronous version and resonant derivatives.