لطفا مداري را بگذاريد كه 12 ولت ما شينو به 35 +و35- تبديل كند...اگر با pbc باشد كه عالي ميشه.
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دوست عزيز يكي از بهترين مدار كنورتر 12 به + _ 35 ولت همين مدار است كه در تاپيك منابع تغذيه و احتمالا در امپلي فاير ها بطور كامل اپلود كرده ام اين مدار توسط خودم تست شده و كارايي بسيار خوبي هم دارد و فشار مازادي بر باتري اتومبيل هم وارد نميكند كه يكي از محاسن ان ميباشد .
اين هم توضيحاتي از اصل مقاله :
SG3525 DC/DC Converter 12V to +35V,-35V Switchmode Power Supply For Car Audio
The selected
switching topology is called a "push-pull" converter, because the transformer has a double primary (or a "centre-tapped" one, if your prefer). The centre tap is permanently connected to the
car battery (via an LC ****** to avoid creating peaks in the battery lines, which could affect other electronic equipment in the car). The two ends of the primary are connected to a pair of paralleled MOSFETs each that tie them to ground in each conduction cycle (Vgs of the corresponding MOSFET high).
These MOSFETs should be fast, able to withstand high currents (in excess of 30A each if possible) and have the lowest possible Rds(on). The proposed On-Semiconductor?s MTP75N06 can withstand 75Amp and has a Rds(on) below 10 milliohm. This is important, because the lower this resistance is, the less power they are going to dissipate when switching with a square waveform. Another alternatives are MTP60N06, or the more popular BUZ11 and IRF540.
Although the schematics show a previous bipolar push-pull stage, you can also connect the gate resistor directly to the output of the controlling IC, leaving out the transistors, as the
SG3525 is capable to drive up to 500 mA (theoretically), more than enough to switch the MOSFETs fast.
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