18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah
polymer lithium battery

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LR03 alkaline battery

3.7v 18650 battery pack

release time:2024-04-07 Hits:     Popular:AG11 battery

  Engineer explains: Switching power supply design—transformer process

  This series of articles starts from the theoretical basis. Experienced former engineers explain the design of switching power supplies and explain the difficulties. This series contains almost all common topological circuits and is designed for self-study engineers. Personally crafted, I hope it can help everyone get out of confusion and get on the right track as soon as possible.

  Calculate primary inductance

  The K value is the current continuous ratio mentioned above. Ip2 defined in the calculation book above is the rising edge of the current and Ip1 is the trailing edge of the rising current. Therefore, when K=0, the transformer works below the critical mode. To prevent calculation errors, it is generally customary to take 0.001.

  Intermittent mode Ip is ΔI;

  Obtained ΔI from--》E*T=L*ΔI:

  Lp=(Vinmin*Tonmax)/ΔI

  At this time, the inductance required by the transformer primary is obtained.


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