NCP4318ALSDR2G

Power Supply Controllers, Monitors Overview

The NCP4318ALSDR2G is a dual-channel synchronous rectification controller designed for LLC resonant converters. It features two independent gate driver stages with dedicated drain and source sensing inputs, each rated for 200V. The device operates within a wide frequency range of 22 kHz to 500 kHz and supports a supply voltage from 6.5 V to 35 V. It provides high peak drive currents of 1.5 A source and 4.5 A sink. The controller includes advanced adaptive dead-time control, mixed-mode SR turn-off control, and anti-breakthrough protection to maximize efficiency and reliability in high-power density applications.

Power Supply Controllers, Monitors Feature Summary

• Dual independent gate driver stages with separate 200V-rated drain and source sensing pins for precise MOSFET control
• Advanced adaptive dead-time control algorithm that compensates for parasitic inductance to minimize body diode conduction
• Mixed-mode synchronous rectifier turn-off control combined with anti-breakthrough protection for stable operation across load ranges
• High current drive capability with 1.5 A source and 4.5 A sink currents for fast switching transitions

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 'ALS' against the official onsemi datasheet to confirm pinout compatibility and electrical specifications relative to other NCP4318 variants. Ensure the ordering information matches the required package type and tape/reel configuration. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and current production status before finalizing procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component for LLC resonant converter designs requiring high efficiency through synchronous rectification. The dual-channel architecture supports center-tapped secondary windings common in lower output voltage scenarios. Consider the wide operating temperature range and robust protection features for demanding industrial or consumer electronics environments where thermal management and reliability are critical.

Power Supply Controllers, Monitors Part Context

The NCP4318 family consists of dual-channel synchronous rectification controllers optimized for isolated DC-DC conversion topologies. These devices replace traditional diode rectifiers with MOSFETs to reduce conduction losses. The NCP4318ALSDR2G belongs to this series, offering integrated sensing and driving capabilities to simplify secondary-side circuit design while maintaining high performance in modern power supply architectures.

Power Supply Controllers, Monitors Replacement Considerations

Check for NCP4318AXX or NCP4318BXX variants which share the same core functionality but may differ in pin assignments. Verify if alternative packages such as DFN or QFN are available from onsemi for space-constrained designs. Ensure any substitute maintains the 200V sensing rating and compatible drive current specifications.