NCP4318ALKDR2G

Power Supply Controllers, Monitors Overview

The NCP4318ALKDR2G is a dual-channel synchronous rectification controller designed for LLC resonant converters. It features two independent gate drive stages with separate drain and source sensing inputs to minimize body diode conduction. The device supports a wide operating frequency range from 22 kHz to 500 kHz and accepts a supply voltage between 6.5 V and 35 V. It provides high peak output currents of 1.5 A source and 4.5 A sink, with fast switching delays of 30 ns. The controller operates within a junction temperature range of -40°C to +125°C and is housed in an 8-SOIC package.

Power Supply Controllers, Monitors Feature Summary

• Dual independent gate drive stages with dedicated drain and source sensing pins for precise control
• Advanced adaptive dead-time control to minimize body diode conduction and maximize efficiency
• Hybrid mode synchronous rectification shutdown control with anti-breakthrough protection
• Wide operating supply voltage range from 6.5 V to 35 V

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 applications

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'ALCDR2G' against the requested 'ALKDR2G' designation, as official documentation lists the ALCDR2G variant. Confirm RoHS compliance and MSL level 1 status during sourcing. Ensure the supplier provides valid traceability data for the SOIC-8 package. Cross-reference the manufacturer part number with distributor catalogs to confirm availability and authenticity before finalizing procurement orders.

Power Supply Controllers, Monitors Selection Notes

Select this component for LLC resonant converter designs requiring minimal external components. The integrated adaptive dead-time control reduces system complexity by compensating for parasitic inductance variations. The wide supply voltage range allows direct connection to secondary-side outputs. Ensure the application frequency falls within the 22 kHz to 500 kHz operational window for optimal performance and stability.

Power Supply Controllers, Monitors Part Context

The NCP4318 series belongs to onsemi's portfolio of power management ICs focused on secondary-side synchronization. This family targets high-efficiency isolated DC-DC conversion topologies. The NCP4318 specifically addresses the challenges of low-voltage, high-current outputs by replacing traditional diodes with controlled MOSFETs. It represents a solution for modern power supplies demanding higher energy efficiency and reduced thermal dissipation.

Power Supply Controllers, Monitors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.