NCP4318ALFPDR2G

Power Supply Controllers, Monitors Overview

The NCP4318ALFPDR2G is a dual-channel synchronous rectification controller designed for LLC resonant converters. It features two independent gate driver stages with dedicated drain and source sense inputs, rated up to 200V. The device operates on a supply voltage of 0V to 35V with a typical supply current of 8 mA. It supports a wide switching frequency range from 22 kHz to 500 kHz and functions within a junction temperature range of -40°C to 125°C. Packaged in an 8-SOIC-EP (3.90mm width) surface-mount housing, it includes advanced adaptive dead-time control and mixed-mode shutdown algorithms.

Power Supply Controllers, Monitors Feature Summary

• Dual independent gate driver stages with dedicated 200V-rated drain and source sense pins
• Advanced adaptive dead-time control to minimize body diode conduction and maximize efficiency
• Mixed-mode synchronous rectifier shutdown control ensuring stable operation across load ranges
• Adaptive gate voltage control supporting both 10V and 6V drive levels

Power Supply Controllers, Monitors Applications

• High power density adapters
• Large screen LED and OLED TV power supplies
• Efficient desktop and server power supplies
• Network and telecommunications power systems
• High-power LED lighting

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'LFP' against the manufacturer datasheet to confirm pinout compatibility and electrical characteristics, as variations exist within the NCP4318 family. Ensure the 8-SOIC-EP package footprint matches the design layout. Confirm RoHS3 compliance requirements align with project specifications before finalizing procurement orders.

Power Supply Controllers, Monitors Selection Notes

Select this component for LLC resonant topologies requiring high-voltage secondary-side sensing. The dual-channel architecture supports full-bridge or half-bridge configurations. Consider the 200V sense rating for high-voltage transformer designs. Evaluate the need for adaptive dead-time control to optimize efficiency under varying load conditions compared to fixed-timing alternatives.

Power Supply Controllers, Monitors Part Context

This part belongs to the NCP4318 family of dual-channel synchronous rectification controllers by onsemi. The family offers different pinout versions (AXX and BXX) to accommodate various PCB layouts. The NCP4318 series is engineered to reduce external component count while providing robust protection features like anti-breakdown control and soft-start capabilities for reliable converter performance.

Power Supply Controllers, Monitors FAQ

What is the maximum voltage rating for the sense inputs?

The dedicated drain and source sense pins are rated for 200V.

Does the controller support variable gate drive voltages?

Yes, it features adaptive gate voltage control that can operate at 10V or 6V.