150w dc dc boost converter schematic

150w dc dc boost converter board
150w dc dc boost converter

Most of you familiar with this 150w dc to dc boost converter board. The boost converter board can able to provide up to 35V dc in the output (12v to 35v ). So in this article i would like to share the Schematics of this dc to dc boost converter and explaining about how it is working.

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150w dc dc boost converter circuit schematics

150w dc dc boost converter schematics.jpg

The boost converter is working with UC3843 IC. The input voltage of this circuit is 10v to 35v DC, means if you applied 10v on the input section you can get upto 35v dc with 6A current. More specification of this circuit is listed below.

SpecificationValues
Input voltage12v to 35v DC
Output voltage12v to 35v DC ( Adjustable )
Maximum out put current6A
Maximum Input current10A
Full load temperature 45 degree Celsius
Working temperatureUpto 85 degree Celsius

Components required

Components quantity needed
UC3843 IC1
7809 voltage regulator ic1
CS4145 Mosfet1
2sc3142-3 transistor1
toroid core with 7 turns1
2cz2045 Diode1
10k pot1
1000uf/35v capacitor 2
ceramic capacitor pin 1 to 2100nf
ceramic capacitor pin 4 to ground1.2nf
1k,100 ohms, 15k, 5.1k, 30k, 0.01ohms 5watt, 3k3 resistorall need 1 -2 pieces

Working

The UC3843 is a popular IC using in smps circuits. The ic is build with a pulse width modulation circuit to control output voltage of the power supplies.

The internal structure of this IC consist of Oscillator, error amplifier, PWM comparator, Feed back loop circuit.

The oscillator circuit inside of the ic will produce the Sawtooth waveform at a high frequency. The frequency is determined by the externally connected components to the circuit.

The error amplifier will cross check the reference voltage applied through the voltage regulator and output voltage of the power supply. Then it will produce the error signal on it.

The PWM comparator receiving this error signal and it will compare the error signal with the sawtooth wave form.

Depending on this comparison the circuit will turn on and off at a particular cycle. as a switched mode powering. the output signal is taking out from the pin number 3 of the IC to drive the power mosfet.

This is the working of the 150w dc dc boost converter, so you can easily build this circuit at home for bench power supply. if you like this article don’t forget to share on social media.

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