UCC28700DBVR

AC DC Converters, Offline Switchers Overview

The UCC28700DBVR is a constant-voltage, constant-current PWM controller designed for isolated flyback converters. It utilizes primary-side regulation to eliminate optocouplers and secondary feedback components. The device operates within an input voltage range of 9 V to 35 V and supports a switching frequency from 875 Hz to 140 kHz. It provides a maximum duty cycle of 99% and delivers up to 25 mA output current. The IC is housed in a SOT-23-6 package and functions reliably across a temperature range of -20°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Implements primary-side regulation to remove the need for optocouplers and error amplifiers.
• Supports discontinuous conduction mode (DCM) flyback topologies.
• Integrates valley switching capability to reduce switching losses and electromagnetic interference.

AC DC Converters, Offline Switchers Applications

• Universal AC input power supplies
• Adapter designs requiring high efficiency
• Battery chargers with constant voltage/current profiles

AC DC Converters, Offline Switchers Procurement Notes

Verify the suffix DBVR corresponds to the SOT-23-6 surface-mount package. Confirm RoHS compliance status through official Texas Instruments documentation. Ensure the specific revision matches design requirements. Cross-reference the manufacturer part number against authorized distributor catalogs to avoid counterfeit components. Validate thermal performance specifications for the intended operating environment.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-sensitive applications where eliminating secondary-side regulation components reduces bill of materials. Suitable for low-power isolated converters utilizing DCM operation. Consider the SOT-23-6 footprint constraints during PCB layout. Verify that the required output current does not exceed the internal regulator limits. Evaluate thermal dissipation capabilities within the specified operating temperature range.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC28700 series of primary-side regulated controllers. It shares functional similarities with the UCC28701, UCC28702, and UCC28703 models. These variants typically differ in pinout configurations or specific feature sets while maintaining core PSR capabilities. The series targets efficient, compact power supply designs.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitutes include UCC28700DBVT. Other family members such as UCC28701, UCC28702, and UCC28703 may serve as alternatives depending on package and pin compatibility requirements.