DESCRIPTION
The Contek UC3842A/3843A provide the necessary functions to implement off-line or DC to DC fixed frequency current mode , controlled switching circuits with a minimal external part count.

FEATURES
* Low external part count.
* Low start up current ( Typical 0.12mA )
* Automatic feed forward compensation
* Pulse-by-Pulse current limiting
* Under-voltage lockout with hysteresis
* Double pulse Suppression
* High current totem pole output to drive MOSFET directly
* Internally trimmed band gap reference
* 500kHz operation