ML4827CP1

Overview

The ML4827CP1 is a current mode PWM controller manufactured by Fairchild Semiconductor, designed for offline power factor correction applications. It integrates an average current mode control architecture with a built-in boost PFC controller and a secondary-side PWM controller. The device operates within a supply voltage range of 11V to 22V and supports switching frequencies up to 64kHz. It features a wide operating temperature range from -40°C to +85°C and is housed in a 28-pin PDIP package.

Feature Summary

• Integrates dual control loops for simultaneous power factor correction and DC-DC conversion
• Employs average current mode control for precise input current shaping
• Includes dedicated secondary-side PWM controller for isolated output regulation

Applications

• Offline AC-DC power supplies requiring high power factor
• Telecommunications power systems
• Industrial power conversion units

Procurement Notes

Verify the specific suffix 'CP1' against the manufacturer's official datasheet to confirm pinout compatibility and thermal specifications. Ensure the component meets RoHS3 compliance requirements if applicable to your manufacturing standards. Cross-reference the package type with your PCB footprint design to avoid assembly errors.

Selection Notes

Select this component for designs requiring integrated PFC and PWM functionality to reduce bill of materials count. Consider the 28-pin PDIP package for through-hole mounting requirements or prototyping phases. Evaluate the 64kHz switching frequency limit against your electromagnetic interference filtering strategy and transformer size constraints.

Part Context

This part belongs to the ML482x series of power factor controllers developed by Fairchild Semiconductor. These devices are engineered to simplify the design of high-performance AC-DC converters by combining PFC and PWM stages into a single integrated circuit solution.

Replacement Considerations

Consult official substitution guides for equivalent parts such as the FAN4827 series. Verify that any alternative maintains identical pin configurations and control loop characteristics to ensure seamless integration without redesigning the printed circuit board.