UC5613PWP

Overview

The UC5613PWP is a high-performance, low-power PWM controller manufactured by Texas Instruments. It operates within a wide supply voltage range of 4.5V to 30V, making it suitable for various power conversion topologies. The device integrates a precision oscillator with an external timing resistor and capacitor, allowing flexible frequency adjustment. Key electrical characteristics include a fixed off-time control mechanism and a built-in reference voltage of 5.1V. It features under-voltage lockout protection and soft-start capability to ensure stable startup conditions. The component is housed in a 16-pin TSSOP package, designed for compact printed circuit board layouts.

Feature Summary

• Integrates a precision oscillator with adjustable frequency via external components
• Features fixed off-time control for simplified design in flyback applications
• Includes under-voltage lockout and soft-start functionality for reliable operation

Applications

• Flyback converters for AC-DC adapters
• Offline switch-mode power supplies
• Battery chargers and power tools

Procurement Notes

Verify the specific suffix PWP indicates the 16-pin TSSOP package variant when sourcing. Confirm the manufacturer marking aligns with Texas Instruments standards. Check for RoHS compliance status if required for your assembly process. Ensure the part number matches the exact revision level needed for your design specifications.

Selection Notes

Select this component for designs requiring a cost-effective PWM solution with integrated protection features. Consider the operating frequency range determined by external RC components. Evaluate thermal performance based on the TSSOP package limitations. Compare against alternative controllers if higher current drive or different topology support is required.

Part Context

This model belongs to the UC series of PWM controllers, which are widely used in offline power supply applications. The UC5613 variant specifically targets flyback converter designs due to its fixed off-time architecture. It serves as a direct replacement for older legacy parts in existing designs while offering improved efficiency and integration levels typical of modern power management ICs.

Replacement Considerations

Direct pin-to-pin replacements may include other UC series variants from Texas Instruments. Verify compatibility with existing PCB footprints and external component values. Cross-reference with equivalent parts from other manufacturers only if electrical parameters match exactly.