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Home > Shunt Reference Regulators
UC3943 Datasheet
  

HIGH PERFORMANCE CURRENT MODE CONTROLLERS

 

 

DESCRIPTION

 

The UTC UC3943 is specifically designed for off-line and
dc-to-dc converter applications offering the designer a
cost-effective solution with minimal external components.
The UTC UC3943 has UVLO thresholds 8.4V (on) and
7.6V(off), ideally suited for off-line converters.

FEATURES

* With burstmode for lower standby power
* With greenmode for higher light load efficiency
* Oscillator frequency guaranteed at 250kHz
* Automatic feed forward compensation
* Latching PWM for cycle-by-cycle current limiting
* Internally trimmed reference with undervoltage lockout
* High current totem pole output
* Undervoltage lockout with hysteresis
* Low startup and operating current

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