CS52845

The CS52845 provides all the nec-essary features to implement off-line fixed frequency current-mode control with a minimum number of external omponents.

The CS52845  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 An undervoltage lockout ensures that VREF is stabilized before the output stage is enabled. In the CS52845 turn on is at 8.4V and turn off at 7.6V.

Other features CS52845 include low start-up current, pulse-by-pulse current lim-iting, and a high-current totem pole output for driving capacitive loads,such as gate of a power MOSFET. The output is low in the off state, consistent with N-channel devices. duty-cycle range to less than 50%.