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SC4809B

Semtech Corporation
Part Number SC4809B
Manufacturer Semtech Corporation
Description High Performance Current Mode PWM Controller
Published Nov 17, 2008
Detailed Description High Performance Current Mode PWM Controller POWER MANAGEMENT Description The SC4809A/B/C is a 10 pin BICMOS primary sid...
Datasheet PDF File SC4809B PDF File

SC4809B
SC4809B

Overview
High Performance Current Mode PWM Controller POWER MANAGEMENT Description 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 features a 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 www.
DataSheet4U.
com 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 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 free package.
SC4809A/B/C Featur...


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