NCP4307FASNT1G

Power Supply Controllers, Monitors Overview

The NCP4307FASNT1G is a secondary side synchronous rectification driver manufactured by onsemi, designed for high-efficiency switch-mode power supplies. It operates within a supply voltage range of up to 35V and supports an operating temperature range from -40°C to +125°C TJ. The device features a TSOP-6 package and draws a maximum supply current of 500 µA. It provides peak drive capabilities of 7A sink and 2A source currents, with turn-on and turn-off times specified at 8.9ns and 4.7ns respectively.

Power Supply Controllers, Monitors Feature Summary

• Self-supplies from an internal 200V CS pin, enabling high-side configuration and low VOUT applications without auxiliary power.
• Dual VCC pins select the optimal power source to minimize losses across wide output voltage ranges.
• Features precise secondary true zero-current detection and positive dv/dt sensing for reliable operation.
• Includes automatic light-load disable mode and ultra-fast trigger interface/enable input.

Power Supply Controllers, Monitors Applications

• USB Power Delivery (PD) adapters
• High-density AC/DC power supplies
• LCD TV power systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'FA' against the manufacturer's official ordering guide to confirm pinout and feature variations. Ensure the selected variant matches the required thermal performance for the target application environment. Cross-reference the datasheet revision date with the component marking to guarantee compatibility with design specifications.

Power Supply Controllers, Monitors Selection Notes

Select this component for topologies such as DCM or CCM flyback, quasi-resonant flyback, and forward converters. Consider the self-supply capability when designing for low output voltages where auxiliary windings are impractical. Evaluate the dual VCC pin flexibility to optimize efficiency across varying load conditions and output ranges.

Power Supply Controllers, Monitors Part Context

This part belongs to the NCP4307 family of secondary side synchronous rectification drivers. These devices are engineered to control SR MOSFETs in high-performance SMPS topologies. The series emphasizes versatility, supporting various configurations including high-side and low-side setups while maintaining noiseless operation through self-synchronization features.

Power Supply Controllers, Monitors Replacement Considerations

NCP4307AASNT1G

Power Supply Controllers, Monitors FAQ

How does the NCP4307FASNT1G handle high-side configuration?

It self-supplies from an internal 200V CS pin, allowing high-side configuration without requiring an external auxiliary power supply.

What is the purpose of the dual VCC pins?

The dual VCC pins allow the device to select the optimal VCC source to minimize losses, optimizing designs for a wide range of output voltages.