Download the UC2843 datasheet PDF.
This datasheet also covers the UC2844 variant, as both devices belong to the same currentmode pwm controller family and are provided as variant models within a single manufacturer datasheet.
General Description
TheUC3842/3/4/5family of controlICs provides the necessary
Key Features
to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal externalparts count. Internallyimplementedcircuits include undervoltagelockout featuring start-up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input,
Minidip
SO14
logic to insure latched operation, a PWM comparatorwhich also providescurrentlimit control,and a totem pole output stage designed to source or sink high peak current. The output stage,.
Full PDF Text Transcription for UC2843 (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
UC2843. For precise diagrams, and layout, please refer to the original PDF.
UC2842/3/4/5 ® UC3842/3/4/5 CURRENT MODE PWM CONTROLLER . OPTIMIZED FOR OFF-LINE AND DC TO DC CONVERTERS . LOW START-UP CURRENT (< 1 mA) . AUTOMATIC FEED FORWARD COMPENSA...
View more extracted text
TERS . LOW START-UP CURRENT (< 1 mA) . AUTOMATIC FEED FORWARD COMPENSA- TION . PULSE-BY-PULSE CURRENT LIMITING . ENHANCED LOAD RESPONSE CHARAC- TERISTICS . UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS . DOUBLE PULSE SUPPRESSION . HIGH CURRENT TOTEM POLE OUTPUT . INTERNALLY TRIMMED BANDGAP REFER- ENCE . 500 KHz OPERATION . LOW RO ERROR AMP DESCRIPTION TheUC3842/3/4/5family of controlICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal externalparts count.
UC2843 Datasheet
