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UC2843ADTR

TIUC2843ADTR

Texas Instruments
Boost, Buck, Flyback, Forward Converter Regulator Output DC-DC Controller IC 14-SOIC
Active5,983 in stock
Datasheet Digi-Key Compare Prices

Overview

The UC2843ADTR is a high-performance current-mode PWM controller designed for off-line and DC-DC converter applications. It features a high-speed oscillator capable of 500kHz operation, a high-current totem pole output for driving external MOSFETs, and comprehensive protection features like pulse-by-pulse current limiting.

Why Choose This Part

This controller offers optimized feedforward compensation and enhanced load response characteristics for stable power delivery. Its low 300uA standby current and undervoltage lockout with hysteresis ensure efficient and reliable operation across varying input conditions.

Applications

Switch Mode Power Supplies (SMPS)
Utilized in high-efficiency AC-DC converters where current-mode control provides superior line and load regulation.
DC-DC Converters
Ideal for boost, buck, flyback, and forward converter topologies in industrial power systems.
Industrial Power Supply Units
Used in rugged environments requiring a wide operating temperature range of -40 to 85 degrees Celsius.
Battery Operated PSU
The low start-up current of less than 0.5mA makes it suitable for power-sensitive battery applications.

Key Specifications

Topology Boost, Buck, Flyback, Forward Converter
Clock Sync No
Output Type PWM
Mounting Type Surface Mount
Package / Case 14-SOIC (0.154", 3.90mm Width)
Duty Cycle (Max) 100%
Number of Outputs 1
Frequency - Switching Up to 500kHz
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 14-SOIC

Getting Started

Designers should consult the Texas Instruments datasheet for RC timing component selection to set the desired switching frequency up to 500kHz. Evaluation of the layout is critical, ensuring the high-current totem pole output has a short path to the gate of the external power MOSFET.

UC2843 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
UC2843ADTR (this part) Tape & Reel SOIC-14 5,983
UC2843AD8TR Tape & Reel SOIC-8 4,688

Categories

Power Management > Switching Regulators