UCC2813PWTR-2

AC DC Converters, Offline Switchers Overview

The UCC2813PWTR-2 is a low-power economy BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates with a switching frequency up to 1 MHz and supports duty cycles up to 100%. The device features undervoltage lockout (UVLO) thresholds of 4.1 V start and 3.6 V restart. It is housed in an 8-pin TSSOP package and functions within an operating temperature range of -40°C to +85°C.

AC DC Converters, Offline Switchers Feature Summary

• Supports high-frequency operation up to 1 MHz for compact magnetic component design
• Includes internal soft-start circuitry to limit inrush current during startup
• Provides 100% maximum duty cycle capability for minimum input voltage conditions

AC DC Converters, Offline Switchers Applications

• Boost converter topologies
• Flyback power supplies
• Forward converter designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'PWTR' confirms the tape-and-reel packaging format rather than tube packaging. Confirm the '-2' variant matches the required UVLO thresholds of 4.1 V/3.6 V for your application. Ensure the TSSOP-8 footprint aligns with your PCB layout constraints. Check for RoHS compliance status as indicated in official documentation.

AC DC Converters, Offline Switchers Selection Notes

Select this component when a low-cost, low-quiescent current PWM controller is required for isolated or non-isolated DC-DC converters. The 1 MHz switching frequency allows for smaller inductors and transformers compared to lower-frequency alternatives. The current-mode control simplifies loop compensation and provides inherent line feed-forward.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC2813-x family of low-power economy BiCMOS current-mode PWM controllers. The family includes variants with different UVLO thresholds (-0, -1, -2, -3) to accommodate various supply rail requirements. These devices are designed for cost-sensitive applications requiring efficient power management.

AC DC Converters, Offline Switchers Replacement Considerations

Direct substitutes include other UCC2813-x variants such as UCC2813PWTR-0, UCC2813PWTR-1, or UCC2813PWTR-3, provided their specific UVLO thresholds match the system design requirements. Verify pin compatibility and thermal performance when swapping between these family members.