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UC2842B

ST Microelectronics
Part Number UC2842B
Manufacturer ST Microelectronics
Description HIGH-PERFORMANCE CONTROLLER
Published Apr 13, 2007
Detailed Description ® UC2842B/3B/4B/5B UC3842B/3B/4B/5B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER comparatorwhich alsoprovidescurrent ...
Datasheet PDF File UC2842B PDF File

UC2842B
UC2842B

Overview
® UC2842B/3B/4B/5B UC3842B/3B/4B/5B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER comparatorwhich alsoprovidescurrent limit control, and a totem pole output stage designed to source or sink high peakcurrent.
The outputstage, suitable for driving N-Channel MOSFETs, is low in the offstate.
Differences between members of this family are the DESCRIPTION under-voltagelockout thresholds and maximum duty TheUC384xB family ofcontrolICs providesthe neccycle ranges.
The UC3842B and UC3844B have essary features to implement off-line or DC to DC UVLO thresholds of 16V (on) and 10V (off), ideally fixed frequency current mode control schemes www.
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com with suitedoff-lineapplicationsThecorrespondingthresha minimal external parts count.
Internally impleoldsforthe UC3843BandUC3845Bare8.
5 V and7.
9 mented circuits include a trimmed oscillator for preV.
The UC3842B and UC3843B can operate to duty cycles approaching 100%.
A range of the zero to < cise DUTY CYCLE CONTROL under voltage lockoutfea...


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