TL494 mini dc converter

เป็นวงจรง่ายฯ ใช้tl494ขับmosfet โดยตรง โดยใช้R DEVIDER ควบคุมไม่ให้ G-Sมีโวลท์มากเกินไป จะทำให้กินกระแสstanby แต่ถ้าvole G-Sน้อยไป เวลามีโหลดก็จะจ่ายกระแสไม่พอ ทำให้ไฟออกตกมาก วงจรที่ทดลองG-Sประมาณ3.3v ทำงานได้ดี
 

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Using google translate for you.
It's a simple circuit. Use tl494 to drive mosfet directly using R DEVIDER to control G-S not too many volts Will cause stanby currents, but if the G-S vole is too small, when there is a load, it will not supply enough current Causing a lot of fire The experimental G-S circuits of approximately 3.3v work well.
 
Hi Nigel,
Thanks, but that wasn't the point. I was hoping the OP would translate his post in his own (intended) words.

Pretty neat little circuit that I might find useful. It doesn't have any feedback to control the output voltage.

-Chris