UC3846N ,SMPS ControllerUC3846SMPS Controller
UC3846NG4 ,Current Mode PWM Controller 16-PDIP 0 to 70Maximum Ratings(1)over operating free-air temperature range (unless otherwise noted)MIN MAX UNITSup ..
UC3846Q ,Current Mode PWM Controllerfeatures high outputs in the OFF• Industrial Power Convertersstate.(1)Device InformationPART NUMBER ..
UC3847DW ,Current Mode PWM ControllerMaximum Ratings(1)over operating free-air temperature range (unless otherwise noted)MIN MAX UNITSup ..
UC3847J ,Current Mode PWM Controller SLUS352C–JANUARY 1997–REVISED DECEMBER 20155 Pin Configuration and FunctionsJ or N, DW Packages16- ..
UC3848N , Average Current Mode PWM Controller
UN4111 ,Composite DeviceTransistors with built-in ResistorUNR411x Series (UN411x Series)Silicon PNP epitaxial planar typeUn ..
UN4112 ,Composite DeviceElectrical Characteristics T = 25°C ± 3°CaParameter Symbol Conditions Min Typ Max UnitCollector-ba ..
UN4112 ,Composite DeviceAbsolute Maximum Ratings T = 25°CaParameter Symbol Rating UnitCollector-base voltage (Emitter open ..
UN4113 ,Composite DeviceTransistors with built-in ResistorUNR411x Series (UN411x Series)Silicon PNP epitaxial planar typeUn ..
UN4113 ,Composite DeviceTransistors with built-in ResistorUNR411x Series (UN411x Series)Silicon PNP epitaxial planar typeUn ..
UN4114 ,Composite DeviceElectrical Characteristics T = 25°C ± 3°CaParameter Symbol Conditions Min Typ Max UnitCollector-ba ..
UC3846N
SMPS Controller
Features Automatic Feed Forward Compensation Programmable Pulse by Pulse Current Limiting Automatic Symmetry Correction in Push-Pull
Configuration Enhanced Load Response Characteristics Parallel Operation Capability for Modulator Power
Systems Differential Current Sense Amplifier with Common Mode
Range Double Pulse Suppression 200mA Totem-Pole Outputs ±2% Band gap Reference Under-Voltage Lockout Soft-Start Capability Shutdown Terminal 500KHz Operation
DescriptionThe UC3846 control IC provides all of the necessary fea-
tures to implement fixed frequency, current mode control
schemes while maintaining a minimum external parts count.
The superior performance of this technique can be measured
in improved line regulation, enhanced load response char-
acteristics, and a simpler, easier-to-design control loop.
Topological advantages include inherent pulse-by-pulse cur-
rent limiting capability, automatic symmetry correction for
push-pull converters, and the ability to parallel “power
module,, while maintaining equal current sharing. Protection
circuitry includes built-in-under-voltage lockout and pro-
grammable current limit in addition to soft-start capability. A
shutdown function is also available which can initiate either
a complete shutdown with automatic restart or latch the
supply off. Other features include fully latched operation,
double pulse suppression, deadtime adjust capability, and
±2% trimmed bandgap reference. The UC3846 features low
outputs in the OFF state.
