AP3928S-13

Overview

The AP3928S-13 is a high-voltage, non-isolated offline switcher manufactured by Diodes Incorporated. It utilizes primary-side regulation (PSR) topology in an SO-8 package. The device operates as a buck converter with a single output capable of delivering up to 600 mA. Key electrical parameters include a maximum input voltage rating typical for high-voltage applications, a quiescent current of 136 µA, and an operating temperature range from -40°C to +125°C. The component is RoHS compliant and supplied in tape-and-reel packaging.

Feature Summary

• Primary-side regulation eliminates the need for optocouplers and secondary-side feedback components.
• High-voltage startup capability allows direct connection to rectified mains without external bias supplies.
• Integrated protection features ensure safe operation under abnormal conditions.

Applications

• Offline AC/DC power supplies
• Battery chargers
• Standby power sources

Procurement Notes

Verify the specific suffix '13' corresponds to the required tape-and-reel quantity and packaging format. Confirm RoHS compliance status matches project requirements. Ensure the SO-8 package footprint aligns with PCB layout constraints. Cross-reference the manufacturer part number against authorized distributor catalogs to avoid counterfeit components.

Selection Notes

Select this component when designing non-isolated offline converters requiring simplified bill-of-materials through primary-side regulation. Consider the 600 mA output current limit and thermal performance within the SO-8 package for load requirements. Evaluate the wide operating temperature range for harsh environment suitability. Verify input voltage specifications against the target application's line conditions.

Part Context

This part belongs to the AP3928 series of high-voltage offline switchers. It is designed for cost-sensitive applications where isolation is not strictly required or where non-isolated topologies are preferred. The series targets compact power solutions with reduced component count compared to isolated counterparts using secondary-side regulation.

Replacement Considerations

Consult official substitution guides for compatible PSR switchers from Diodes Incorporated. Verify pinout compatibility and electrical parameter overlaps before replacing. Ensure thermal dissipation characteristics match the original design constraints.

FAQ

Does the AP3928S-13 require an optocoupler for regulation?

No, it uses primary-side regulation (PSR) which eliminates the need for an optocoupler and auxiliary winding.

What is the maximum output current capability?

The device supports an output current of up to 600 mA.