SC4905B: High-Performance Voltage-Mode PWM Controller | Semtech

The SC4905A SC4905B is a 10 pin BICMOS primary side voltage mode controller for use in Isolated DC-DC and off-line switching power supplies. It is a highly integrated solution, requiring few external components. The device features a high speed Oscillator with integrated feed forward compensation, accurately programmable maximum duty cycle, voltage mode of operation, line voltage monitoring, supply UVLO, low start up current, low voltage current limit threshold and user accessible reference. The SC4905A SC4905B device operates at 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 forces biphase operation (180 degrees apart) which reduces input ripple and Filter size. The SC4905A has a typical turn-on threshold of 4.4V and the SC4905B has a typical turn-on threshold of about 11.6 volts. By Semtech Corporation
SC4905B 's PackagesSC4905B 's pdf datasheet

SC4905B Pinout, Pinouts
SC4905B pinout,Pin out
This is one package pinout of SC4905B,If you need more pinouts please download SC4905B's pdf datasheet.

SC4905B Application circuits
SC4905B circuits
This is one application circuit of SC4905B,If you need more circuits,please download SC4905B's pdf datasheet.

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