ML4822CP

Overview

The ML4822CP is a Power Factor Correction (PFC) and Pulse Width Modulation (PWM) controller combo IC manufactured by Fairchild Semiconductor. It integrates circuits for leading-edge average current mode boost PFC and trailing-edge PWM. The device operates in a 16-pin DIP package with an operating temperature range of 0°C to 70°C. It supports switching frequencies up to 250kHz for the PWM section, enabling efficient power supply designs that comply with IEC1000-2-3 specifications.

Feature Summary

• Integrates average current mode PFC and trailing edge PWM controllers in a single IC
• Provides low total harmonic distortion and reduced ripple current in storage capacitors
• Includes over-voltage comparator to prevent output runaway during load removal
• Features input voltage brown-out protection and peak current limiting

Applications

• Power factor corrected switched mode power supplies
• AC-DC converters requiring IEC1000-2-3 compliance
• High efficiency power supply designs

Procurement Notes

Verify component authenticity due to historical manufacturer transitions. Confirm package integrity and pin compatibility before integration. Check for obsolescence status as original production may have ceased. Ensure environmental compliance documentation matches project requirements. Validate electrical parameters against current design specifications.

Selection Notes

Select this component for applications requiring integrated PFC and PWM control. Consider the 16-pin DIP package for through-hole mounting needs. Evaluate thermal performance within the specified operating temperature range. Assess suitability for average current mode operation to minimize harmonic distortion. Verify frequency capabilities align with transformer and filter design constraints.

Part Context

The ML4822 series belongs to Fairchild's portfolio of combined PFC and PWM controllers. These devices are designed to simplify power supply architecture by reducing component count. The CP suffix indicates a plastic dual in-line package variant. This family targets industrial and commercial power conversion applications.

Replacement Considerations

ML4824CS2 is a documented alternative from onsemi offering similar functionality in a SOIC package.