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TI's UC3843 is a Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C. Find parameters, ordering and quality information
UC3843 is a control IC for off-line or DC to DC fixed frequency current mode control schemes with minimal external parts. Download the PDF datasheet or view the HTML version for more details, features, and specifications of UC3843.
UC3843 is a current-mode PWM controller for off-line and DC-to-DC converters. It has an onboard amplifier, a totem pole gate driver, and various features such as synchronization, shutdown, slope compensation, and soft start.
UC3843 is a fixed frequency current-mode PWM controller for DC to DC converter applications. It features a trimmed oscillator, a temperature compensated reference, a high gain error amplifier, a current sensing comparator and a totem pole output.
Introduction of UC3843 PWM Controller IC. The UC843 is essentially an active mode Pulse Width Modulation (PWM) controller with a fixed frequency. It also could be described as the UC3843 buck converter. It is designed to be used for DC to DC converter functions and offline applications and needs only the smallest external components.
UC3843 is a current mode PWM controller that can regulate or limit current in applications like SMPS, RPS, DC-DC converters, etc. Learn about its pin configuration, specifications, equivalent, alternatives and how to use it in a circuit.
Download the PDF datasheet of UC3843, a current mode PWM controller for switching power supplies. Compare with similar parts from other manufacturers and learn about Texas Instruments.
The UC3842 and UC3843 have a maximum duty cycle of approximately 100%, whereas the UC3844 and UC3845 are clamped to 50% maximum by an internal toggle flip flop. This duty cycle clamp is advantageous in most fly-back and forward converters. For optimum IC perform-ance the deadtime should not exceed 15% of the oscilla-tor clock period.
Order today, ships today. UC3843N - Regulator Output DC-DC Controller IC 8-PDIP from Texas Instruments. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
The UC3843 IC is a pulse-width modulation controller that works by controlling a buck-boost converter. So it works in either boost or buck mode based on the i/p and o/p voltage necessities. The UC3843 IC in buck mode changes the output voltage by simply controlling the switching transistor's duty cycle within the buck converter circuit.