TIUC2843AD8TR
Overview
The UC2843AD8TR is a high-performance current-mode PWM controller designed for off-line and DC-DC converter applications. It features a trimmed oscillator for precise duty cycle control and a high-current totem pole output capable of driving external MOSFET gates. The device is optimized for power supply designs requiring minimal external components and efficient pulse-by-pulse current limiting.
Why Choose This Part
This controller offers very low start-up current of less than 0.5mA, which improves overall system efficiency during standby. It provides enhanced load response characteristics and automatic feedforward compensation, ensuring stability across varying input voltages up to 500kHz operation.
Applications
Key Specifications
Getting Started
Designers should begin by calculating the timing resistor and capacitor values to set the switching frequency for their specific topology. Ensure the VDD supply stays within the 11V to 25V range for proper operation, and utilize the 8-SOIC footprint for compact surface-mount PCB layouts. Evaluation can be performed using standard current-mode PWM prototyping techniques on a dedicated power supply test board.
UC2843 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Stock |
|---|---|---|
| UC2843AD8TR (this part) Tape & Reel | SOIC-8 | 4,688 |
| UC2843ADTR Tape & Reel | SOIC-14 | 5,983 |
