D8520HP DIP8 固态电源 PWM IC+场效应管

  D8520HP is a current mode PWM controller with integrated high voltage power MOSFET., and applications in sub 27W range. In PWM mode, D8520HP operates in fixed frequency which is precisely set internally.D8520HP could operate in Green Mode at no load or light load, can improved efficiency and low standby power. Small current is needed when D8520HP starts up and works, thus a large value resistor could be used in the startup circuit to minimize the standby power. Slope compensation circuit is integrated in D8520HP, which improves system large signal stability and reduces the possible sub-harmonic oscillation at high PWM duty cycle. Leading-edge blanking on current sense (CS) input eliminates the signal glitch due to snubber circuit diode reverse recovery current. Frequency Shuffling technique is integrated in D8520HP, which helps to achieve excellent EMI performance. To ensure that power supplies work quietly, the frequency is set beyond 20 KHz in Extended Burst Mode. D8520HP offers complete protection functions including cycle-by-cycle current limiting protection(OCP), over load protection(OLP),VDD over voltage protection(OVP), VDD over voltage clamp and under voltage lockout(UVLO). Driven by internal totem pole can improve the properties of IMI system and soft switching control. D8520HP is offered in DIP8 Pb-free package.