NCP4303BDR2G

Power Supply Controllers, Monitors Overview

The NCP4303BDR2G is a secondary side synchronous rectification driver from onsemi, designed for high-efficiency switch-mode power supplies. It supports Flyback, Forward, and Half Bridge topologies with a single output. The device operates at a switching frequency of 500 kHz and features a maximum duty cycle of 50%. It delivers an output current of 2.5 A with a supply voltage range up to 24 V. Operating temperatures span from -40°C to +150°C. Packaged in an 8-SOIC surface-mount case, it includes non-isolated insulation and has rise/fall times of 80 ns and 35 ns respectively.

Power Supply Controllers, Monitors Feature Summary

• Optimizes efficiency in flyback, forward, and half-bridge converter topologies through secondary side synchronous rectification control.
• Supports wide operating temperature ranges suitable for demanding industrial and commercial environments.
• Integrates fast switching characteristics to minimize conduction losses in power conversion applications.

Power Supply Controllers, Monitors Applications

• High-efficiency flyback power supplies
• Forward converter designs
• Half bridge power conversion systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix BDR2G against the official datasheet to confirm pinout and electrical specifications match your design requirements. Check for obsolescence status as some variants may be marked Not Recommended for New Designs. Ensure compatibility with your PCB footprint for the 8-SOIC package. Confirm RoHS compliance documentation is available for regulatory adherence. Validate supplier authenticity to avoid counterfeit components.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing isolated or non-isolated converters requiring secondary side drive for synchronous rectifiers. Compare output current capabilities against load requirements. Consider thermal performance given the 150°C maximum junction temperature rating. Evaluate the 500 kHz switching frequency against magnetic component constraints. Ensure the SOIC-8 package fits within the mechanical enclosure limits.

Power Supply Controllers, Monitors Part Context

This part belongs to the NCP4303 series of secondary side synchronous rectification drivers. It complements primary side controllers by managing the synchronous rectifier MOSFETs directly on the secondary winding. This approach reduces diode forward voltage drops, significantly improving overall power supply efficiency compared to traditional rectification methods.

Power Supply Controllers, Monitors Replacement Considerations

NCP4304ADR2G is listed as a direct substitute in distributor databases. Verify functional equivalence and pin compatibility before substitution. Other NCP43xx series devices may offer different current ratings or packaging options.