Designing of 12V to 24V DC Converter Circuit using LM324

Posted on

Designing of 12V to 24V DC Converter Circuit using LM324 - The primary purpose of this mission is to design and assemble a 12V to 24V DC Converter. Principally, this circuit is a Enhance Converter sort DC-DC voltage converter. One of the purposes of this circuit is the photo voltaic electrical system. This photo voltaic electrical system consisting of a 12V photo voltaic panel, 12 V enter voltage is from the battery storage tools and the 24 V output voltage would be the enter of the inverter within the photo voltaic electrical system. The circuit is a DC-DC voltage converter constructed with LM324 IC which is configured as an oscillator to produce the switching frequency and a transistor because the semiconductor switching component.

12V to 24V DC Converter using LM324

Earlier than going to circuit development and operation we'll focus on fundamentals of the Enhance sort DC-DC converter and LM324 IC. The LM324 is a quad op-amp, which suggests it has 4 operational amplifiers inside it; the 12V to 24V DC Converter circuit designed using solely two op-amps of LM324.

Enhance Converter (Step-Up) Fundamentals

The boost converter is used to step-up/ improve an enter voltage to some extent greater degree, required by the load. The upper degree is achieved by storing vitality in an inductor and releasing it to the load at a better voltage. The foremost circuit for a step up converter or enhance converter includes an inductor, diode, capacitor, change and error amplifier with change management circuitry. The fundamental circuit of step-up converter is proven beneath.

12V to 24V DC Converter

Enhance Converter Operation

When the change is ON, the inductor output is related to floor and the voltage Vin is positioned throughout it. The inductor present will increase at a fee equal to Vin/L.

READ  Generating PWM Signals With Variable Duty Cycle using FPGA

When the change is OFF, the voltage throughout the inductor adjustments and is equal to Vout-Vin. The present that was flowing within the inductor decays at a fee equal to (Vout-Vin)/L.

By the legislation of conservation of vitality, the enter power has to be equal to output power (assuming no losses within the circuit). Enter power (Pin) = output power (Pout).

Since Vin < Vout in a lift converter, it follows then that the output present is lower than the enter present.

Subsequently in enhance converter Vin < Vout and Iin >Iout


READ : Microcontroller Based Ultrasonic Object Detection Circuit


LM324 Operational Amplifier

LM324 consists of 4 unbiased, high-gain operational amplifiers on a single monolithic substrate. To keep up unity acquire every of the amplifier supplied with an on-chip capacitor which offers frequency compensation.


LM324 IC
LM324 IC


  • Operation of Single or Twin Provides
  • Unity-Acquire Bandwidth- 1MHz
  • DC Voltage Acquire- 100dB
  • Enter Bias Present- 45nA
  • Enter Offset Voltage- 2mV
  • Enter Offset Present- 5nA


  • Summing Amplifiers
  • Multi-vibrators
  • Oscillators
  • Transducer Amplifiers
  • DC Acquire Blocks

12V to 24V DC Converter Circuit using LM324 and Working

The circuit diagram for 12V to 24V DC Converter is proven beneath. IC1 LM324 is the core of this circuit. IC1-A, resistors R1, R2, R3, and capacitor C1 types an oscillator which operates at round 500Hz. R2 and C1 are used to tune the oscillator frequency. IC1-B is related as a comparator which compares the output voltage with a reference and feeds again a voltage to the oscillator stage for the aim of controlling the output voltage.

12V to 24V DC-DC Converter - 12V to 24V DC Converter
12V to 24V DC-DC Converter

A Potential divider using preset R5 is related to the non-inverting pin of IC1. The output voltage is related to the inverting enter pin by way of a 100Ok resistor. An output of this comparator stage is fed to the non-inverting enter pin of IC1a by way of one other 100Ok resistor. The output of the oscillator stage is related to the bottom of transistor Q1 and resistor R7 is used for limiting the bottom present of Q1.

READ  Implementation of Wireless PC Communication System by using Transceiver

When the output of the oscillator is high, transistor Q1 shall be turned ON and the inductor L1 get charged (present by way of the inductor L1 begins to improve). When the output oscillator goes low, transistor Q1 shall be switched OFF and now the one path for the inductor present is thru diode D2, capacitor C3, and the load if any.

The flyback diode D2 shall be ahead biased and the vitality saved within the inductor through the ON state shall be dumped into the capacitor. Diode D1 acts as a freewheeling diode.

An inductor will all the time attempt to oppose any variation within the present passing by way of it and this property of the inductor is utilized right here. When charged it shops vitality and when discharged it behaves like an vitality source.

The voltage it outputs through the discharge section is proportional to the speed of change of present by way of it. Because the switching frequency will increase the induced EMF (Electro Motive Force) from the inductor additionally will increase.

I hope you have got clearly understood the subject of 12V to 24V DC Converter. In case you have any queries on this matter or on and digital tasks depart the feedback beneath.

Source :