UCC28720DR

AC DC Converters, Offline Switchers Overview

The UCC28720DR is a constant-voltage, constant-current controller with primary-side regulation designed for bipolar power devices. It operates in a 7-pin SOIC package and supports switching frequencies from 680 Hz to 80 kHz. The device provides isolated output regulation without an optocoupler, featuring a maximum duty cycle of 99% and an output voltage capability of 21 V. It functions within a temperature range of -40°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Provides isolated-output constant-voltage and constant-current regulation using primary-side sensing
• Eliminates the need for an optical coupler and secondary-side feedback components
• Designed specifically for driving bipolar power devices in flyback topologies

AC DC Converters, Offline Switchers Applications

• Low-cost single PCB board solutions for cube chargers
• Isolated power supplies requiring primary-side regulation
• Flyback converter designs utilizing bipolar transistors

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix DR indicates the SOIC-7 package variant when sourcing. Confirm that the component is intended for use with bipolar power devices rather than MOSFETs. Ensure the application design accounts for the specified operating temperature range of -40°C to +125°C. Cross-reference the datasheet version to confirm compatibility with current manufacturing standards.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications prioritizing cost reduction through the elimination of optocouplers. It is suitable for designs where primary-side regulation accuracy meets system requirements. Consider the requirement for bipolar power devices when designing the gate drive circuitry. Evaluate the 680 Hz to 80 kHz frequency range against transformer size constraints.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC28720 family of primary-side regulation controllers. It shares functional similarities with other members like the UCC28722 but is distinct in its target power device type. The DR suffix denotes the standard SOIC-7 surface-mount package. It serves as a core component for simplified isolated power supply architectures.

AC DC Converters, Offline Switchers Replacement Considerations

The UCC28722DBVR is a related controller in the same family. Verify if the alternative supports the required bipolar device interface. Check package compatibility between SOIC-7 and SOT-23-6 if pinout differences exist.