ML4824CS1

Overview

The ML4824CS1 is a Power Factor Correction and PWM Controller Combo IC from onsemi, housed in a 16-SOIC package. It operates as an average current mode controller with a switching frequency of 76 kHz. The device integrates internally synchronized PFC and PWM circuits to reduce total harmonic distortion and storage capacitor ripple current. It supports continuous boost leading edge PFC and high-efficiency trailing edge PWM operation configurable for current or voltage mode.

Feature Summary

• Internally synchronized PFC and PWM functions within a single integrated circuit
• Average current mode control for continuous boost power factor correction
• High-efficiency trailing edge PWM with configurable current or voltage mode operation
• Integrated over-voltage comparator to prevent output runaway during load removal

Applications

• Power factor corrected switched mode power supplies
• AC-DC converters complying with IEC1000-2-3 specifications
• Applications requiring reduced bulk capacitor size and cost

Procurement Notes

Verify the specific suffix designation against official documentation to confirm pinout and electrical characteristics, as variations exist within the family. Confirm RoHS compliance status through the manufacturer's current datasheet, as historical data may indicate non-compliance for certain variants. Ensure the selected package matches the required thermal and mechanical constraints for the target design.

Selection Notes

Select this component for designs requiring combined PFC and PWM control to minimize component count and board space. Consider the fixed 76 kHz switching frequency when designing input and output filters. Evaluate the need for internal synchronization benefits versus external clocking requirements. Verify that the SOIC package fits the available footprint and assembly process capabilities.

Part Context

The ML4824 series belongs to onsemi's portfolio of power management integrated circuits designed for efficient AC-DC conversion. This specific model combines power factor correction and pulse width modulation functionalities, addressing regulatory requirements for harmonic distortion while optimizing power supply performance and size.

Replacement Considerations

ML4824CS2: Similar SOIC package variant with different switching frequency configuration.