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MOSFET BASED BOOST CONVERTER AIM To design the boost converter and evaluate the performance. PRINCIPLE Boost converter A Boost DC-DC converter is essentially a step up chopper for which the average output voltage is higher than the input voltage. Hence the name is boost. The circuit operation can be divided into 2 modes Mode 1 begins when MOSFET is switched on at t=0. The input current, which rises flows through filter inductor L, and switch. Mode 2 begins when the MOSFET is switched off at t=t1. The current that was flowing through the switch through L,C, load and diode Dm. The inductor current falls initial MOSFET turned on the next cycle . The energy stored in inductor L is transferred to the load . CIRCUIT DIAGRAM OBSERVATIONS SL NO DUTY RATIO OUTPUT VOLTAGE VOLTAGE AND CURRENT WAVE FORM PROCEDURE 1. Simulated the given circuit diagram using Matlab simulink. 2. Observe and record the load voltage and load current. DESIGN Given: Vs , input voltage = 5V Va, Required output voltage = 15V Average load current, Ia = 0.5A Frequency = 25kHz ∆I = 0.89A & ∆Vc = 60.61mV R = Va/Ia = 15/0.5 = 30Ω Va = Vs/(1-k) or k = 2/3 = 0.6667 L = [Vs*(Va-Vs)]/[f*Va*∆I] = 150µH. C = Ia*k/f*∆Vc = 220µF RESULT The boost converter is designed and evaluated its performance.