UC3845AD8TRG4 ,Current Mode PWM Controller 8-SOIC 0 to 70Maximum ratings table with maximum negative voltage and GND pin notes..... 6Changes from Revision B ..
UC3845ADTRG4 ,Current Mode PWM Controller 14-SOIC 0 to 70Block Diagram... 1011.8 Glossary. 257.3 Feature Description.... 1012 Mechanical, Packaging, and Ord ..
UC3845AJ ,Current Mode PWM Controller SLUS223E–APRIL 1997–REVISED JANUARY 20175 Device Comparison TableUVLOTURNON AT 16 V TURNON AT 8.4 ..
UC3845AM ,Current Mode PWMsMaximum Ratings.. 612 Device and Documentation Support........ 357.2 ESD Ratings........ 612.1 Rela ..
UC3845AN ,HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERMaximum ratings table with maximum negative voltage and GND pin notes..... 6Changes from Revision B ..
UC3845B ,High Performance Current Mode ControllerUC2842B/3B/4B/5BUC3842B/3B/4B/5B® HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER. TRIMMED OSCILLATOR ..
UN2213 ,Composite DeviceAbsolute Maximum Ratings T = 25°CaParameter Symbol Rating UnitCollector-base voltage (Emitter open ..
UN2213 ,Composite DeviceTransistors with built-in ResistorUNR221x Series (UN221x Series)Silicon NPN epitaxial planar transi ..
UN2214 ,Composite DeviceAbsolute Maximum Ratings T = 25°CaParameter Symbol Rating UnitCollector-base voltage (Emitter open ..
UN2215 ,Composite DeviceTransistors with built-in ResistorUNR221x Series (UN221x Series)Silicon NPN epitaxial planar transi ..
UN2216 ,Composite DeviceElectrical Characteristics T = 25°C ± 3°CaParameter Symbol Conditions Min Typ Max UnitCollector-ba ..
UN2216 ,Composite DeviceFeatures• Costs can be reduced through downsizing of the equipment andreduction of the number of pa ..
UC3845A-UC3845AD8-UC3845AD8TRG4-UC3845ADTRG4-UC3845AN
Current Mode PWM Controller
VIN
UC2843A
VCC
VREF
RT/CT
GND
ISENSE
OUTPUT
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UC1842A, UC1843A, UC1844A, UC1845A
UC2842A, UC2843A, UC2844A, UC2845A
UC3842A, UC3843A, UC3844A, UC3845ASLUS224F –SEPTEMBER 1994–REVISED OCTOBER 2017
UCx84xA Current-Mode PWM Controller Features Optimized for Off-Line and DC-DC Converters Low Start-Up Current(< 0.5 mA) Trimmed Oscillator Discharge Current Automatic Feedforward Compensation Pulse-by-Pulse Current Limiting Enhanced Load Response Characteristics Undervoltage Lockout With Hysteresis Double Pulse Suppression High-Current Totem Pole Output Internally-Trimmed Bandgap Reference Upto 500-kHz Operation Createa Custom Design Using the UCx84xA With
the WEBENCH® Power Designer
Applications Switch Mode Power Supplies (SMPS) DC-DC Converters Power Modules Industrial PSU Battery Operated PSU
DescriptionThe UCx84xA familyof control devicesisa pin-for-pin
compatible improved versionof the UCx84x family.
Providing the necessary featuresto control current-
modeor switched-mode power supplies, this family
devices has many improved features: startup current less than 0.5 mA, oscillator dischargeis trimmed
8.3 mA, and during UVLO, the output stage can least10 mAat less than 1.2V for VCC over5
Device Information(1)(1) Forall available packages, see the orderable addendum
the endofthe data sheet.
Device Comparison Table
Simplified Application Diagram
