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UC1846JN/a755avaiCurrent Mode PWM Controller
UC1846J/883B |UC1846J883BN/a12avaiCurrent Mode PWM Controller
UC1846J/883B |UC1846J883BTIN/a402avaiCurrent Mode PWM Controller
UC1846J883BTIN/a203avaiCurrent Mode PWM Controller
UC1846J883BTIBBN/a35avaiCurrent Mode PWM Controller


UC1846J ,Current Mode PWM ControllerMaximum Ratings(1)over operating free-air temperature range (unless otherwise noted)MIN MAX UNITSup ..
UC1846J/883B ,Current Mode PWM Controllerfeatures to implement fixed-• Programmable Pulse-by-Pulse Current Limitingfrequency, current-mode c ..
UC1846J/883B ,Current Mode PWM Controller SLUS352C–JANUARY 1997–REVISED DECEMBER 20155 Pin Configuration and FunctionsJ or N, DW Packages16- ..
UC1846J883B ,Current Mode PWM Controllerfeatures high outputs in the OFF• Industrial Power Convertersstate.(1)Device InformationPART NUMBER ..
UC1846J883B ,Current Mode PWM ControllerBlock Diagram..... 8Information..... 177.3 Feature Description...... 84 Revision HistoryNOTE: Page ..
UC1846JQMLV ,Current Mode PWM Controller SLUS871D–JANUARY 2009–REVISED DECEMBER 20165 Pin Configuration and FunctionsFK PackageJ or W Packa ..
ULN2001 ,HIGH-VOLTAGE/ HIGH-CURRENT DARLINGTON ARRAYSULN2001A-ULN2002A® ULN2003A-ULN2004ASEVEN DARLINGTON ARRAYS. SEVEN DARLINGTONS PER PACKAGE.OUTPUT C ..
ULN2001A ,SEVEN DARLINGTON ARRAYSULN2001A-ULN2002A® ULN2003A-ULN2004ASEVEN DARLINGTON ARRAYS. SEVEN DARLINGTONS PER PACKAGE.OUTPUT C ..
ULN2001D ,Seven darlington arraysABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Output Voltage 50 VoV Input Voltage (for ULN20 ..
ULN2001D1013TR ,SEVEN DARLINGTON ARRAYSULN2001A-ULN2002A® ULN2003A-ULN2004ASEVEN DARLINGTON ARRAYS. SEVEN DARLINGTONS PER PACKAGE.OUTPUT C ..
ULN2002 ,SEVEN DARLINGTON ARRAYSULN2001A-ULN2002A® ULN2003A-ULN2004ASEVEN DARLINGTON ARRAYS. SEVEN DARLINGTONS PER PACKAGE.OUTPUT C ..
ULN2002A ,HIGH VOLTAGE, HIGH CURRENT DARLINGTON TRANSISTOR ARRAYSULN2001A-ULN2002A® ULN2003A-ULN2004ASEVEN DARLINGTON ARRAYS. SEVEN DARLINGTONS PER PACKAGE.OUTPUT C ..


UC1846J-UC1846J/883B-UC1846J883B
Current Mode PWM Controller
VREF
+E/A
-E/A
AOUT
C/S+
BOUT
C/S-
UCX846
VIN
.1µF
180Ÿ
68Ÿ
.05µF
68Ÿ
2N4150
.5Q
1N4245
1N4245
1N4245
UES1402
UES1402
300µF
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UC1846, UC1847, UC2846
UC2847, UC3846, UC3847

SLUS352C –JANUARY 1997–REVISED DECEMBER 2015
UCx846/7 Current Mode PWM Controller Features 3 Description

The UC1846/7 familyof control devices providesall Automatic Feedforward Compensation of the necessary features to implement fixed-• Programmable Pulse-by-Pulse Current Limiting frequency, current-mode control schemes while• Automatic Symmetry Correctionin Push-Pull maintaininga minimum external parts count. The
Configuration superior performance of this technique can be
measuredin improved line regulation, enhanced load• Enhanced Load Response Characteristics response characteristics, anda simpler, easier-to-• Parallel Operation Capabilityfor Modular Power design control loop. Topological advantages includeSystems inherent pulse-by-pulse current limiting capability, Differential Current Sense Amplifier with Wide automatic symmetry correction for push-pull
Common Mode Range converters, and the abilityto parallel power modules
while maintaining equal current sharing.• Double-Pulse Suppression
Protection circuitry includes built-in undervoltage• 500-mA (Peak) Totem-pole Outputs
lockout and programmable current limit,in additionto• ±1% Band Gap Reference soft-start capability.A shutdown function is also• Undervoltage Lockout available, which can initiate either a complete Soft-Start Capability shutdown with automatic restartor latch the supply
off.• Shutdown Terminal 500-kHz Operation Other features include fully-latched operation, double-
pulse suppression, deadline adjust capability, anda
±1% trimmed band gap reference.2 Applications
The UC1846 features low outputsin the OFF state,• Telecommunication Power Converters
while the UCx847 features high outputsin the OFF• Industrial Power Converters state.
Device Information(1)

(1) Forall available packages, see the orderable addendumat
the endofthe datasheet.
Block Diagram
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