LM2577 belongs to the monolithic integrated circuit, is a very commonly used booster power supply IC, more commonly used in the booster circuit, belongs to the chip produced by TI company, the chip has fewer peripheral circuits, easy to use. The chip has three different voltage output versions: 12V, 15V, ADJ (adjustable), the maximum voltage of the chip 65V, the input voltage range is 3.5V~40V, the output voltage is up to 60V, the chip has a rated current of 3A NPN switching transistor, there are overcurrent, thermal limit and undervoltage lock and other related protection circuit, the internal 52KHZ fixed frequency oscillator, With soft start function, low impulse current.