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UC3843B - HIGH-PERFORMANCE PWM CONTROLLER

Download the UC3843B datasheet PDF. This datasheet also covers the UC3842B variant, as both devices belong to the same high-performance pwm controller family and are provided as variant models within a single manufacturer datasheet.

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 include a trimmed oscillator for precise DUTY CYCLE.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC3842B_Motorola.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
UC3843B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER ST Microelectronics
UC3843B CONTROLLERS UTC
UC3843B HIGH-PERFORMANCE CONTROLLER ON Semiconductor
UC3843B Controllers American First Semiconductor
UC3843B High Performance Current Mode Controller HOTCHIP

Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
UC3843A HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3842A HIGH-PERFORMANCE CONTROLLERS
UC3842B HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3844D HIGH PERFORMANCE CURRENT MODE CONTROLLERS

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
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.
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