\u0645\u0634\u062e\u0635\u0627\u062a :<\/h2>\n\n\n\n

\u0631\u0646\u062c \u0648\u0644\u062a\u0627\u0698 \u0648\u0631\u0648\u062f\u06cc : 40Vdc-90Vdc
\u0648\u0644\u062a\u0627\u0698 \u062e\u0631\u0648\u062c\u06cc : 12V-15A (\u0642\u0627\u0628\u0644 \u062a\u063a\u06cc\u06cc\u0631 \u0628\u0647 \u0633\u0641\u0627\u0631\u0634 \u0645\u0634\u062a\u0631\u06cc)
\u0631\u06cc\u067e\u0644 \u0648 \u0646\u0648\u06cc\u0632 \u062e\u0631\u0648\u062c\u06cc : 1.5% max
\u0641\u0631\u06a9\u0627\u0646\u0633 \u06a9\u0627\u0631\u06cc : 70KHz
\u062c\u0631\u06cc\u0627\u0646 \u0628\u06cc \u0628\u0627\u0631\u06cc : 20mA
\u062c\u0631\u06cc\u0627\u0646 \u0627\u062a\u0635\u0627\u0644 \u06a9\u0648\u062a\u0627\u0647 : 16.5A<\/p>\n\n\n\n

\u0631\u0627\u0646\u062f\u0645\u0627\u0646 :<\/h2>\n\n\n\n

92% @ Full load
91% @ 75 % Load
89.5 @ 50% Load
88.5 % 25% Load
\u0645\u062d\u0627\u0641\u0638 \u0627\u062a\u0635\u0627\u0644 \u06a9\u0648\u062a\u0627\u0647
\u0645\u062d\u0627\u0641\u0638 \u0627\u0636\u0627\u0641\u0647 \u0628\u0627\u0631
\u0645\u062d\u0627\u0641\u0638 \u0627\u0648\u0631\u0648\u0644\u062a\u0627\u0698 (Crowbar)
\u0645\u062d\u0627\u0641\u0638 \u067e\u0644\u0627\u0631\u06cc\u062a\u0647 \u0645\u0639\u06a9\u0648\u0633 \u0648\u0631\u0648\u062f\u06cc (\u0641\u06cc\u0648\u0632+\u062f\u06cc\u0648\u062f \u0645\u0639\u06a9\u0648\u0633)<\/p>\n\n\n\n

• <\/figure><\/li>

  <\/figure><\/li>

  <\/figure><\/li>

  <\/figure><\/li><\/ul><\/figure>\n\n\n\n

  180watt step-down converter (tank) project<\/h2>\n\n\n\n

  This project was designed at the request of the employer to be used in locomotives and similar items, which is used to set up devices such as wireless communication, refrigerator, fan, etc. is used
  The IC used in this circuit is my favorite IC, TL494, it is selected from extension I with industrial temperature range, first we tested this circuit with LM2576 IC and MOSFET P-CH, but we did not get good results, finally the circuit design It was changed and we went to TL494 with N-CH switch and bootstrap driver, we used IR21xx IC for highside MOSFET drive, which had a better result than P-CH, the only problem is the duty cycle limit of about 90% in this topology. But overall it was more reasonable.
  This circuit seems simple to me, but when I entered the process of testing the circuit, I was shocked to realize that electronics is very broad and I don’t know anything about it, we encountered strange problems that we have not read or seen anywhere, but with the help of the team Well, we solved it.<\/p>\n\n\n\n

  :Specifications<\/h2>\n\n\n\n

  Input voltage range: 40Vdc-90Vdc
  Output voltage: 12V-15A (can be changed according to customer’s order)
  Ripple and output noise: 1.5% max
  Working frequency: 70KHz
  No-load current: 20mA
  Short circuit current: 16.5A<\/p>\n\n\n\n

  :Efficiency<\/h2>\n\n\n\n

  92% @ Full load
  91% @ 75% Load
  89.5 @ 50% Load
  88.5% 25% Load
  Short circuit protector
  Overload protection
  Overvoltage protector (Crowbar)
  input reverse polarity protection (fuse + reverse diode)<\/p>\n","protected":false},"excerpt":{"rendered":"

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