Buck converter is a electronic circuit that step down high voltage to low voltage. DC to DC buck converter is very essential one in different application. like Audio amplifier, LED circuit and other power supply circuits. Those Buck converter will efficiently convert high voltage DC to low voltage DC.
Introduction to the Buck Converter
A Buck converter is a very simplest circuit. Figure 1 is a model circuit of a buck converter. The circuit contains a Mosfet, PWM controlling IC, Schottky Diode and a toroid core with copper winding coil. The DC transferring function is a equation that relating to the input voltage, output voltage and also the duty cycle. V out = Vin *D where the V out is the voltage in output section, Vin is the voltage input, and D is the duty cycle. ( or the percentage of the time that the Mosfet turn on in the circuit ). The low pass filter ( the toroidal winding coil ) is smoothing the mosfet switching action and produce a nice and smooth DC voltage in the output.
Buck Converter Module in Market
LM2596 Buck Converter Circuit
Components Required
| Part Number | quantity |
| LM2596 | 1 |
| 100uf capacitor | 1 |
| 1N5822 diode | 1 |
| 33uH coil | 1 |
| 220uf/63v capacitor | 1 |
| 50K preset pot | 1 |
| 1.21k ( 1.2k) resistor | 1 |
| power supply | 1 |
| wires | – |
| connectors | – |
