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UC2845 - CURRENTMODE PWM CONTROLLER

Download the UC2845 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,.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC2844_STMicroelectronics.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
UC2845 Current-Mode PWM Controller Texas Instruments
UC2845 High Performance Current-Mode Controller ON Semiconductor
UC2845 HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS Unisonic Technologies
UC2845 fixed frequency current mode PWM controller UMW
UC2845A HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER ST Microelectronics

Other Datasheets by STMicroelectronics

Part Number Description
UC2843 CURRENTMODE PWM CONTROLLER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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- 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.