ML4824IS1X

Overview

The ML4824IS1X is a discontinued Power Factor Correction (PFC) and PWM controller combo IC manufactured by onsemi. It integrates an internally synchronized PFC controller and a high-efficiency trailing-edge PWM controller within a single package. The device operates with an average current mode for the PFC section at a switching frequency of 76 kHz. It supports continuous boost topology and features a fast transconductance error amplifier for voltage loop compensation. The component is housed in a 16-SOIC surface-mount package and is rated for an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates internally synchronized PFC and PWM controllers in a single IC to reduce total harmonic distortion.
• Features average current, continuous boost leading edge PFC control with ripple current reduction capabilities.
• Supports configurable current mode or voltage mode operation for the high-efficiency trailing edge PWM section.

Applications

• Power factor correction stages in AC-DC power supplies
• Combined PFC and PWM controller applications requiring integrated synchronization
• Systems requiring low total harmonic distortion performance

Procurement Notes

This part number is officially listed as discontinued by the manufacturer. Verification of availability should focus on obsolete stock or alternative sourcing channels rather than standard production lines. Ensure compatibility with existing designs before considering replacement options due to the end-of-life status.

Selection Notes

Select this component only if the design specifically requires the integrated PFC/PWM combo architecture with 76 kHz switching frequency. Verify that the 16-SOIC package and -40°C to +85°C temperature range meet system requirements. Consider the discontinued status when planning long-term supply chain stability.

Part Context

The ML4824 series represents onsemi's solution for combining power factor correction and pulse width modulation functions. The IS1 suffix denotes the industrial temperature grade and SOIC package variant. This integration aims to simplify design complexity while maintaining high efficiency and low harmonic distortion in power conversion systems.

Replacement Considerations

ML4824CS1: Same function, commercial grade, SOIC package. ML4824IP1: Same function, industrial grade, DIP package. ML4824CP2_Q: Similar combo function, but differs in switching frequency (81 kHz) and temperature range.