SG3843G Datasheet PDF - ETC

●[

●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