2, the power tube heat

 2, the power tube heat

LED Bulb

Power consumption of the power tube is divided into two parts, switching losses and conduction losses. Note that most applications especially mains LED drive applications, damage to switches larger than conduction losses. Switching losses and power tube cgd and cgs and chip drive capability and working frequency, so the power to solve the heat pipe can be solved from the following aspects:

LED Strip 

A, not one-sided based on resistance MOS power transistor size to choose, because resistance is smaller, cgs and cgd greater the capacitance. If the cgs is 250pF 1N60 around, 2N60 around the cgs is 350pF, 5N60 around the cgs to 1200pF, the difference is too great, choose the power tube,  LED Module enough on it.

B, the rest is the frequency and chip drive capability, and here talk about frequency. Frequency and conduction losses are proportional, so the power tube heating, the first to think about is not frequency selection bit high.