12V to 16V DC/DC Converter with LM2577

This entry was posted on Monday, November 10th, 2008 at 11:39 am and is filed under dc converter, Switching supply.

The circuit is a boost step-up regulator based around an LM2577-ADJ voltage regulator chip and a few other discrete components. Resistors R1 and R2 set the regulated output voltage.
A switch inside the voltage regulator closes between pins 4 and 3, causing current to flow through the inductor to ground. When the switch is released a few microseconds later, a back-EMF ‘kick’ is produced by the inductor, resulting in a positive pulse with respect to the input voltage. This pulse charges the output capacitor via the schottky diode, which tends towards an equilibrium voltage. [...]
วงจรแปลงไฟจาก 12V DC เป็น 16VDC หรือ DC TO DC Converter ใช้ไอซีสำเร็จ เบอร์ LM2577 อ่านต่อและดูรูปวงจร

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