SCT81620Q：宽范60V异步升压/反激/SEPIC控制器

The SCT81620 is a wide input, nonsynchronous boost controller. The Device can be  used in Boost, SEPIC and Flyback converters and  topologies.  The switching frequency of the SCT81620  can be adjusted to any value between 100kHz and  2.2MHz by using a single external resistor or by  synchronizing it to an external clock. Current mode  control provides superior bandwidth and transient  response in addition to cycle-by-cycle current  limiting. Current limit is adjustable through an  external resistor. The SCT81620Q is an Electromagnetic Interference (EMI) friendly controller with implementing optimized  design for EMI reduction. The SCT81620  Frequency Spread Spectrum (FSS) with ±6%  jittering span of the switching frequency and  modulation rate 1/512 of switching frequency to  reduce the conducted EMI.  The SCT81620 has built-in protection  features such as thermal shutdown, short-circuit  protection and overvoltage protection. Power-saving  shutdown mode reduces the total supply current to  3.4 µA. Integrated current slope compensation  simplifies the design and, if needed for specific  applications, can be increased using a single  resistor. The device is available in a MSOP-8L(3mm*3mm)  Package.