ML4824IS1

Overview

The ML4824IS1 is a Power Factor Correction (PFC) and PWM controller combo IC manufactured by onsemi. It integrates an average current mode PFC controller with a high-efficiency trailing-edge PWM controller in a single package. The device operates at a switching frequency of 76 kHz and supports an average current continuous boost topology for the PFC section. It features a fast transconductance error amplifier for the voltage loop and reduces ripple current in the storage capacitor between the PFC and PWM sections. The component is housed in a 16-SOIC package with a width of 7.50 mm.

Feature Summary

• Integrates internally synchronized PFC and PWM controllers within a single IC to reduce total harmonic distortion.
• Utilizes average current mode control for continuous boost PFC operation with leading edge modulation.
• Features a high-efficiency trailing edge PWM controller configurable for current mode or voltage mode operation.

Applications

• Power factor correction stages in AC-DC power supplies
• Combined PFC and PWM controller applications requiring reduced storage capacitor ripple
• Average current mode boost converter designs

Procurement Notes

Verify component status as the ML4824IS1 is listed as obsolete in available records. Confirm availability through authorized distributors or secondary market sources if active procurement is required. Ensure compatibility with existing design specifications before sourcing replacement units, as lead times may vary significantly for discontinued components.

Selection Notes

Select this component for designs requiring integrated PFC and PWM control in a single package to minimize board space and component count. It is suitable for applications needing average current mode control to achieve low total harmonic distortion. Consider the 76 kHz switching frequency and 16-SOIC package constraints when evaluating thermal management and layout requirements for the target application.

Part Context

The ML4824 series includes variants such as ML4824IP1, ML4824CS1, and ML4824CP2. These devices share the core functionality of combining PFC and PWM control but differ in packaging options like DIP-16 or SOIC-16 and specific electrical characteristics. The ML4824IS1 specifically denotes the industrial temperature range variant in the 16-SOIC package.

Replacement Considerations

ML4824CS1

FAQ

What control modes are supported by the PWM section?

The high-efficiency trailing edge PWM controller can be configured for either current mode or voltage mode operation.

How does the ML4824IS1 affect ripple current?

It reduces ripple current in the storage capacitor located between the PFC and PWM sections due to its internally synchronized architecture.