You are to design an AC/DC brick that can power a laptop, and it is to be compri

Question

You are to design an AC/DC brick that can power a laptop, and it is to be comprised of two parts: AC/DC converter of your choice and DC/DC converter of your choice. Specifications: 1.Input voltage 100 240 V rms, frequency 50 to 60 Hz. 2·Output voltage 12 V DC, with 5% ripple and continuous current, output power depends on the first letter of your last name: A -200 W, B-180 W, C 150 W, D - 130 W, E - 120 W, F 110 W, G-100 W, H-90 W, J-80W, K-60W, M-50 W, N-45 W, P-210 W, R-220 W, S-250 W, W-260 W 3.lt is up to you to select all the other parameters (i.e. switching

Explanation / Answer

I would be designing the power supply using a pwm controller for optimum switcing in the range of frequency 30KHz. This would be the minimum frequency required to attain the switching to build a 250 W power supply. For a the dc-dc conversion a smps based buck regulator to convert from 40 V to 12 V is needed. efficiency is maintained above 80%.

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