[
●SYSTEM GENERAL
●]
●DESCRIPTION
●The SG348xG series of current-mode PWM controllers combines high performance with Green-mode power saving features. SG348xG controllers are fully pin-to-pin compatible with bipolar UC384x devices, but they have improved features and functionality. SG384xG series controllers are compatible with the BiCMOS fabrication process, enabling the use of low start-up current and operating currents. This feature further improves power conversion efficiency. The minimal start-up current has been reduced to 5uA, and the minimum operating current has been reduced to 5mA.
●Each SG384xG has a slew rate controlled high current totem pole output, ideally suited for driving a power MOSFET while keeping EMI low.
●FEATURES
●384x series pin-to-pin compatible
●Linearly decreasing PWM frequency
●Burst-mode at low/zero load
●5uA start-up current
●5mA operating current
●Vcc over voltage protection
●Cycle-by-cycle current limiting
●Zero cross-conduction
●Slew rate controlled high current totem pole output
●Fast current sense propagation delay
●Under voltage lockout (UVLO) with hysteresis
●APPLICATIONS
●Switching mode power supplies
●Power converters
