Boost Converter Circuit

A dc to dc boost converter circuit is a circuit that can convert a dc voltage into a larger dc voltage.

Boost converter circuit. A capacitor cin is connected at the pin 6 for removing ripples from the input signal. In this project the boost converter circuit is built using the 34063a dc to dc converter ic. A capacitor inductor or the two in combination. It is a class of switched mode power supply smps containing at least two semiconductors a diode and a transistor and at least one energy storage element.

When fed dc power the inductor acts as a energy storage device for current. It is equivalent to a flyback converter using a single inductor instead of a transformer. The buck boost converter is a type of dc to dc converter that has an output voltage magnitude that is either greater than or less than the input voltage magnitude. The circuit boosts the voltage from the supply hence named as boost converter.

The rest of the components are the same as those used in the buck converter illustrated in fig. All it consists of is an inductor a semiconductor switch a diode and a capacitor. A boost converter step up converter is a dc to dc power converter that steps up voltage while stepping down current from its input supply to its output load. Although a boost converter circuit may involve many complex stages and calculations here we will see how the same could be built using minimum number of components.

So for example you may be able to convert a 5v dc voltage into 30v. 3 2 1 illustrates the basic circuit of a boost converter. A dc to dc converter works on the principle of an inductor primarily and a capacitor. These are the same levels that i recommend for switching from a non synchronous buck to a synchronous.

The input voltage is supplied through a 3 7 v battery which has its anode connected to the pin 6 of the regulator ic and cathode connected to the common ground. For circuits with a high output current generally starting above three amps and especially five amps or more replacing the output diode with a mosfed makes a lot of sense both for efficiency and for heating. As the name suggests it takes an input voltage and boosts or increases it. However in this example the switching transistor is a power mosfet both bipolar power transistors and mosfets are used in power switching the choice being determined by the current voltage switching speed and cost considerations.

A boost converter is one of the simplest types of switch mode converter. The boost converter however does not involve the tedious method of converting dc to ac then stepping up the voltage and then converting the stepped ac voltage to dc. Basic synchronous boost converter.