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UC3842AD8MOTOROLAN/a130avaiCurrent Mode PWM Controller
UC3842AD8G4TIN/a5avaiCurrent Mode PWM Controller 8-SOIC 0 to 70
UC3842AD8TRTIN/a3avaiCurrent Mode PWM Controller
UC3842AD8TRG4TIN/a5000avaiCurrent Mode PWM Controller 8-SOIC 0 to 70
UC3842ADTRTEXASN/a2500avaiCurrent Mode PWM Controller
UC3842ADWTIN/a27avaiCurrent Mode PWM Controller
UC3842ANG4TEXASN/a28avaiCurrent Mode PWM Controller


UC3842AD8TRG4 ,Current Mode PWM Controller 8-SOIC 0 to 70Block Diagram... 1011.8 Glossary. 257.3 Feature Description.... 1012 Mechanical, Packaging, and Ord ..
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UC3842ADTR ,Current Mode PWM ControllerBlock Diagram... 1011.8 Glossary. 257.3 Feature Description.... 1012 Mechanical, Packaging, and Ord ..
UC3842ADW ,Current Mode PWM Controller SLUS224F–SEPTEMBER 1994–REVISED OCTOBER 20174 Revision HistoryNOTE: Page numbers for previous revi ..
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UC3842AD8-UC3842AD8G4-UC3842AD8TR-UC3842AD8TRG4-UC3842ADTR-UC3842ADW-UC3842ANG4
Current Mode PWM Controller
VIN
UC2843A
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GND
ISENSE
OUTPUT
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UC1842A, UC1843A, UC1844A, UC1845A
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UC3842A, UC3843A, UC3844A, UC3845A

SLUS224F –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 Description
The 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
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