UCC2803D

Overview

The UCC2803D is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates within a supply voltage range of 3.6V to 12V and supports switching frequencies up to 1 MHz. The device features a maximum duty cycle of 100% and provides an output drive current of 1 A. It is housed in an SOIC-8 surface-mount package and is rated for operation between -40°C and +85°C.

Feature Summary

• Supports boost, flyback, and forward converter topologies
• Enables high-frequency operation with fast rise and fall times
• Provides full 100% duty cycle capability for continuous conduction mode

Applications

• High-density DC/DC converters
• Battery-powered equipment power supplies
• Adapters and chargers

Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-8 surface-mount package variant. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets before procurement.

Selection Notes

Select this component for applications requiring low quiescent current and high switching frequency. Ensure the design accommodates the SOIC-8 thermal characteristics and validates compatibility with the required boost, flyback, or forward topologies.

Part Context

This part belongs to the UCC2803 series of low-power current-mode PWM controllers. It is designed for cost-sensitive and space-constrained power management solutions where efficiency and compact form factors are critical requirements.

Replacement Considerations

Check for UCC2803N (PDIP) or UCC2803DR (Reel) if pinout or packaging differences are acceptable.