UC3843ADX ,SMPS Controllerapplications. The internal cir-• Cycle by Cycle Current Limiting cuits in ..
UC3843AL-S08-R , CURRENT MODE PWM CONTROL CIRCUITS
UC3843AN ,SMPS ControllerUC3842A, UC3843A,UC2842A, UC2843AHigh PerformanceCurrent Mode ControllersThe UC3842A, UC3843A serie ..
UC3843AN. ,SMPS Controller3AN1080/DIf the efficiency is taken into account and it is assumed that L 1.66 mHpthe typical con ..
UC3843ANG4 ,Current Mode PWM ControllerMaximum Ratings.. 611 Device and Documentation Support........ 246.2 ESD Ratings........ 611.1 Devi ..
UC3843B ,High Performance Current Mode ControllerUC2842B/3B/4B/5BUC3842B/3B/4B/5B® HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER. TRIMMED OSCILLATOR ..
UMZ2 N TR , Power management (dual transistors)
UMZ2N , Power management (dual transistors)
UMZ2N , Power management (dual transistors)
UMZ2NTR , Power management (dual transistors)
UMZ5.1N , Zener diode
UMZ6.8E N , Zener diode
UC3842ADX-UC3842AN-UC3843ADX
SMPS Controller
Features Low Start Current 0.2mA (typ) Operating Range Up To 500KHz Cycle by Cycle Current Limiting Under V oltage Lock Out With Hysteresis Short Shutdown Delay Time: typ.100ns High Current Totem-pole Output Output Swing Limiting: 22V
DescriptionThe UC3842A/UC3843A are fixed PWM controller for Off-
Line and DC to DC converter applications. The internal cir-
cuits include UVLO, low start up current circuit, tempera-
ture compensated reference, high gain error amplifier,
current sensing comparator, and high current totem-pole out-
put for driving a POWER MOSFET. Also UC3842A/
UC3843A provide low start up current below 0.3mA and
short shutdown delay time typ. 100ns. The UC3842A has
UVLO threshold of 16V(on) and 10V(off). The UC3843A is
8.4V(on) and 7.6V(off). The UC3842A and UC3843A can
operate within 100% duty cycle.
