ML4827CS1

Overview

The ML4827CS1 is a power factor correction controller from Fairchild Semiconductor, designed for discontinuous (transition) mode operation at a switching frequency of 80kHz. It is housed in a 16-SOIC package and supports a supply voltage range of 0V to 7V. The device features a startup current of 700 µA, facilitating efficient power management in switched-mode power supplies requiring average current sensing methods.

Feature Summary

• Supports discontinuous transition mode PFC control
• Operates with an 80kHz switching frequency
• Includes fault protection mechanisms
• Utilizes average current sensing for boost topology

Applications

• Power factor corrected switched-mode power supplies
• Boost type power factor correction systems
• General purpose AC-DC conversion circuits

Procurement Notes

Verify the specific suffix CS1 against official Fairchild or ON Semiconductor documentation to confirm pinout and electrical characteristics. Ensure compatibility with 16-SOIC footprints and validate that the 0V-7V supply range meets your design requirements before procurement.

Selection Notes

Select this component when designing for transition mode PFC applications requiring moderate startup currents. Consider the 80kHz frequency constraint and 16-SOIC package size relative to thermal and spatial limitations in the target power supply architecture.

Part Context

This part belongs to the ML482x series of power factor correction controllers. It shares functional similarities with related models like the ML4824 and ML4821 but is specifically optimized for transition mode operation rather than continuous or fixed-frequency modes found in other variants.

Replacement Considerations

Check for direct substitutes within the ML482x family such as ML4824CS1 or ML4821CS, ensuring mode compatibility. Verify pin-to-pin equivalence and electrical parameter alignment with original datasheets before substitution.