|Input voltage||90-300 V|
|Switching frequency||50-1100 kHz|
|Output 1||5 V / 1 A|
The SC4809A/B/C is a 10 pin BICMOS primary side current mode controller for use in Isolated DC-DC and off-line switching power supplies. It is a highly integrated solution, requiring few external components. It featuresa high frequency of operation, accurately programmable maximum duty cycle, current mode control, line voltage monitoring, supply UVLO, low start-up current, and programmable soft start with user accessible reference.It operates in a fixed frequency, highly desirable for Telecom applications. Features a separate sync pin which simplifies synchronization to an external clock. Feeding the oscillator of one device to the sync of another forcesbiphase operation which reduces input ripple and filter size.
The SC4809A/B/C have different threshold and VREF to accommodate a wide variety of applications. These devices are available in the MSOP–10 lead freepackage.