DPA426SN

Special Purpose Regulators Overview

The DPA426SN is an isolated DC-DC converter from the DPA-Switch family, designed for high-power applications up to 100 W. It integrates a 220 V MOSFET with complete control and fault protection circuitry in a single monolithic IC. The device supports a wide DC input voltage range of 16 V to 75 V and provides a regulated output. It utilizes voltage-mode control to allow a 75% duty cycle while maintaining a loop bandwidth greater than 5 kHz. The component features programmable switching frequencies of 300 kHz or 400 kHz and includes built-in automatic restart protection against faults such as overvoltage, undervoltage, and overload.

Special Purpose Regulators Feature Summary

• Integrates a 220 V power MOSFET with all necessary control logic and protection circuits into a single chip.
• Supports low-cost synchronous rectification to enhance efficiency in high-power designs.
• Includes input undervoltage and overvoltage shutdown capabilities compliant with ETSI standards.
• Features lossless integrated current limiting and automatic restart protection for robust operation.

Special Purpose Regulators Applications

• 24 V/48 V distributed power architecture (DPA) DC-DC converters
• Telecommunications central office equipment
• Servers, routers, and network interface cards
• VoIP and digital feature phones

Special Purpose Regulators Procurement Notes

Verify the specific suffix and package type when ordering, as the DPA426SN variant may have different availability status compared to other revisions like the DPA426R. Confirm RoHS compliance and lead times directly with authorized distributors, as some listings indicate limited supply or discontinued status for certain packaging options. Ensure the design accounts for the TO-263 or SPAK package thermal requirements.

Special Purpose Regulators Selection Notes

Select this component for isolated DC-DC conversion tasks requiring high input voltages up to 75 V and outputs up to 100 W. It is suitable for designs needing integrated fault protection to reduce external component count. Consider the available switching frequency options (300 kHz or 400 kHz) based on magnetic component size constraints. Verify compatibility with synchronous rectifier configurations if maximum efficiency is required.

Special Purpose Regulators Part Context

The DPA426SN belongs to the DPA4 series of DPA-Switch products from Power Integrations. This family combines a high-voltage MOSFET with advanced control electronics to simplify power supply design. Unlike lower-power counterparts, this model targets higher wattage applications, offering a compact solution for industrial and telecommunications systems that demand reliable isolation and comprehensive protection features.

Special Purpose Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference guides or contact the manufacturer for validated alternatives, as direct pin-to-pin replacements may require schematic adjustments due to differences in control logic or thermal characteristics.