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CS2844/3845 SERIES
CS2844/CS3844 CS2845/CS3845
Current Mode PWM Control Circuit with 50% Max Duty Cycle
Description
Features
The CS3844/45 provides all the necessary features to implement off-line fixed frequency current-mode control with a minimum number of external components.
The CS3844 family incorporates a new precision temperature-controlled oscillator to minimize variations in frequency. An internal toggle flip-flop, which blanks the output every other clock cycle, limits the duty-cycle range to less than 50%. An undervoltage lockout ensures that VREF is stabilized
before the output stage is enabled. In the CS2844/CS3844 turn on occurs at 16V and turn off at 10V. In the CS2845/CS3845 turn on is at 8.4V and turn off at 7.6V.
CS2845 Datasheet
