Electronics 01
How Does an H-Bridge Work? Decay, Dead Time, Losses
Four switches reverse a motor, but the details decide whether it works: shoot-through and dead time, brake vs coast, why an L298 loses 2.5 V and PWM ripple.
power electronics
Electronics 02
How Does a Boost Converter Work? Worked 3.7 V to 5 V
How a boost converter stores energy in an inductor and releases it at higher voltage. Worked 3.7 V to 5 V design, and why D near 1 fails.
Electronics 03
MOSFET Gate Resistor Value: How to Choose It (With Math)
The gate loop is a series RLC circuit. Choose the gate resistor for damping 0.7 to 1, then check switching loss and pin current. Worked IRLZ44N example.
Electronics 04
How Does a Buck Converter Work? Worked 12 V to 3.3 V
How a buck converter works, from volt-second balance to Vout = D·Vin, with a worked 12 V to 3.3 V, 2 A design, computed waveforms and efficiency.
Electronics 05
How Does an MPPT Charge Controller Work? Real Curves
A 100 W panel on PWM gives 82 W at 25 °C. MPPT recovers the rest by running a DC-DC converter at the panel's best voltage. When it helps and when not.