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UC3842B

ST Microelectronics
Part Number UC3842B
Manufacturer ST Microelectronics
Description HIGH-PERFORMANCE PWM CONTROLLER
Published Jun 6, 2006
Detailed Description UC2842B/3B/4B/5B ® UC3842B/3B/4B/5B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER . TRIMMED OSCILLATOR FOR PRECISE FR...
Datasheet PDF File UC3842B PDF File

UC3842B
UC3842B

Overview
UC2842B/3B/4B/5B ® UC3842B/3B/4B/5B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER .
TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL .
OSCILLATOR FREQUENCY GUARANTEED AT 250kHz .
CURRENT MODE OPERATION TO 500kHz .
AUTOMATIC FEED FORWARD COMPENSA- TION .
LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING .
INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT .
HIGH CURRENT TOTEM POLE OUTPUT .
UNDERVOLTAGE LOCKOUT WITH HYSTER- ESIS .
LOW START-UP AND OPERATING CURRENT DESCRIPTION The UC384xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count.
Internally implemented circuits ...


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