NCP4307WASNT1G

Power Supply Controllers, Monitors Overview

The NCP4307WASNT1G is a secondary side synchronous rectification driver designed for high-efficiency switch-mode power supplies. It features a self-supplying architecture derived from an internal 200V CS pin, enabling high-side configuration and low VOUT operation without auxiliary power. The device includes dual VCC pins to select the optimal source, minimizing losses across wide output voltage ranges. Key electrical parameters include a supply voltage range of 3.7V to 35V, peak output currents of 2A sink and 7A source, propagation delay of 60ns maximum, rise time of 60ns, and fall time of 25ns. Operating temperature spans -40°C to +125°C.

Power Supply Controllers, Monitors Feature Summary

• Self-supplying capability from an internal 200V CS pin eliminates the need for auxiliary power supplies in high-side or low VOUT configurations.
• Dual VCC pins automatically select the optimal power source to minimize conduction losses and optimize design efficiency.
• Integrated precise secondary true zero-current detection ensures accurate timing control for synchronous rectification MOSFETs.
• Positive dv/dt detection and light-load detection mechanisms prevent false triggering and improve performance under varying load conditions.

Power Supply Controllers, Monitors Applications

• USB Power Delivery (PD) applications
• High-density AC/DC power supplies
• Switch-mode power supplies requiring high efficiency

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'WA' against the manufacturer's official ordering information sheet to confirm pinout compatibility and functional specifications relative to other NCP4307 variants. Ensure the selected package matches the TSOP-6 footprint requirements for the target PCB layout. Cross-reference the datasheet revision history to confirm that all electrical characteristics align with the current production version before finalizing component selection.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing topologies such as DCM or CCM flyback, quasi-resonant flyback, active-clamp flyback, and forward converters. The self-supplying feature makes it suitable for applications where auxiliary winding generation is undesirable. Consider the 7A source and 2A sink drive capabilities when sizing the gate resistance and selecting the synchronous rectification MOSFET to ensure adequate switching speed and thermal performance.

Power Supply Controllers, Monitors Part Context

The NCP4307 series serves as a specialized secondary side controller within onsemi's power management portfolio. It addresses the efficiency limitations of traditional diode rectification by actively controlling synchronous MOSFETs. The family offers various package and pinout options to accommodate different board space constraints and circuit integration needs while maintaining consistent core driving performance.

Power Supply Controllers, Monitors Replacement Considerations

NCP4307AASNT1G, NCP4307FASNT1G, NCP4307FBSNT1G