CS52843

The CS52843 provides all the nec-essary features to implement off-line fixed frequency current-mode control with a minimum number of external omponents.

The CS52843  incorporates a new precision temperature-controlled oscillator to minimize variations in frequency. An undervoltage lock- out ensures that VREF is stabilized before the output stage is enabled. In the CS52843 turn on is at 8.4V and turn off at 7.6V.

Other features of CS52843 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.