Bicmos Green-mode Pwm Controllers

The SG3842G SG3843G 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 SG3842G SG3843G 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. The current-sense propagation delay is typically 50ns, resulting in significantly more effective constant Power Protection During normal operation, a SG384xG controller acts as a fixed frequency PWM Controller The PWM frequency CAN be easily programmed by changing external RT and CT values. The SG384xG includes two Green-mode functions that dramatically reduce power usage, helping the power supply comply with the latest international power saving guidelines. To cut power consumption under light load conditions, the controllers Green-mode function will linearly decrease the PWM frequency in response to decreases in the output load. Under ultra light-load/zero-load conditions, the RT/CT PWM Oscillator periodically shuts down, and enters into Burst-mode. This causes the ICs supply voltage to begin gradually dropping. Just before the supply voltage drops below the UVLO voltage threshold, the RT/CT PWM Oscillator turns back on, to prevent the supply voltage from going below the UVLO voltage. SG384xG controllers also come with Over Voltage Protection (OVP). This shuts down PWM output if the supply voltage ever exceeds 27V. The SG384xG series comes in 8-pin DIP and SOP packages. By Unkown
SG3842G 's PackagesSG3842G 's pdf datasheet
SG3842GAD DIP
SG3842GAS SOP
SG3842G2AD DIP
SG3842G2AS SOP
SG3843GAD DIP
SG3843GAS SOP
SG3842GADZ
SG3842GASZ
SG3842G2ADZ
SG3842G2ASZ
SG3843GADZ
SG3843GASZ
SG3843G




SG3842G Pinout, Pinouts
SG3842G pinout,Pin out
This is one package pinout of SG3842G,If you need more pinouts please download SG3842G's pdf datasheet.

SG3842G Application circuits
SG3842G circuits
This is one application circuit of SG3842G,If you need more circuits,please download SG3842G's pdf datasheet.


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