NCP43080ADR2G

Power Supply Controllers, Monitors Overview

The NCP43080ADR2G is a secondary-side synchronous rectifier controller designed for switch-mode power supplies. It supports flyback, quasi-resonant flyback, forward, and LLC topologies. The device features an adjustable minimum off-time and on-time to accommodate various MOSFET packages and PCB layouts. It includes adaptive gate drive clamping for light-load optimization and robust current sensing with high voltage tolerance. The controller operates with a supply voltage up to 35V and provides peak sink/source currents of 8A/4A. It is housed in an 8-SOIC package.

Power Supply Controllers, Monitors Feature Summary

• Supports independent synchronous rectification control across CCM, DCM, and QR modes for multiple converter topologies.
• Features adaptive gate drive clamping that modulates driver clamp voltage based on load conditions to reduce driving losses during light loads.
• Includes precise secondary zero-current detection with robust current sense pins capable of withstanding high voltages.
• Offers external adjustment for minimum on-time and off-time to prevent false triggering from ringing and adapt to different layout constraints.

Power Supply Controllers, Monitors Applications

• Flyback converters
• Quasi-resonant flyback converters
• Forward converters
• LLC resonant converters

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix against the manufacturer's latest datasheet to confirm pinout and electrical characteristics, as variations may exist within the family. Ensure the component meets RoHS compliance requirements for your target market. Confirm the operating temperature range aligns with your system's thermal design specifications before finalizing procurement.

Power Supply Controllers, Monitors Selection Notes

Select this controller when designing high-efficiency power supplies requiring flexible timing adjustments for various MOSFET types. It is suitable for applications needing robust performance in both continuous and discontinuous conduction modes. Consider its compatibility with GaN devices if high-speed switching is required. Evaluate the need for adaptive light-load management to meet energy efficiency standards.

Power Supply Controllers, Monitors Part Context

This component belongs to the NCP43080 series of synchronous rectifier controllers from onsemi. It is part of a broader portfolio of power management ICs focused on improving efficiency in AC-DC adapters and chargers. The series is designed to replace traditional diode-based rectification with active synchronous rectification for significant loss reduction.

Power Supply Controllers, Monitors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by comparing pinouts and electrical parameters with alternative models from the same manufacturer or other suppliers.