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发表于 2010-8-29 21:13:41
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TL431为电压基准 直接驱动不了五只大功率管 用IRF540作为驱动管 这样TL431可以在很小工作电流下驱动电路
tl431's ability to drive a capacitive load is very poor. and the gate capacitance for irf540 is in the 3000pf range, making it an extremely difficult load for the tl431 to drive.
so your power supply may have superior DC performance, its AC performance will be extremely poor: its ability to react to sudden increase of current demand isn't too great, making it unsuitable to power a Class B power amp, for example. |
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