ML4824CP1 Equivalent & Substitute Parts

Part Overview

The ML4824CP1 is a Power Factor Correction (PFC) controller IC manufactured by onsemi, designed for average current mode operation at 76kHz switching frequency in a 16-PDIP through-hole package. This component is classified as obsolete, indicating it is no longer in active production. Finding equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing manufacturing or repair operations for legacy systems utilizing this PFC controller.

Substiute Parts

ML4824CP1

onsemiIn Stock: 5887ML4824CP1 Datasheet

Current PartRFQ

FAN4800AUN

onsemiIn Stock: 35236FAN4800AUN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ML4824CP1 is based on the following critical parameters that define functional compatibility:

Mandatory Compatibility Criteria:

• Functional Mode: Average Current PFC controller operation
• Package Type: 16-DIP (0.300", 7.62mm) through-hole configuration
• Manufacturer: onsemi (same manufacturer ecosystem)
• Pin Configuration: 16-PDIP pinout compatibility

Allowable Parameter Variations:

• Switching Frequency: The ML4824CP1 operates at 76kHz. Substitute parts may operate at higher frequencies (240kHz ~ 268kHz) provided the application circuit design accommodates the frequency difference.
• Supply Voltage Range: The ML4824CP1 requires 10.5V ~ 13.2V. Substitute parts with wider supply voltage ranges (11V ~ 22V) are compatible when the application operates within the original part's voltage specification.
• Startup Current: The ML4824CP1 draws 700 µA at startup. Substitute parts with lower startup current (30 µA) provide improved efficiency characteristics.
• Operating Temperature: The ML4824CP1 operates from 0°C ~ 70°C. Substitute parts with extended temperature ranges (-40°C ~ 105°C) provide broader operational capability.
• Product Status: Active substitute parts ensure ongoing availability and support compared to obsolete original parts.

Parameter Comparison

Engineering Selection Recommendations

FAN4800AUN as Primary Substitute:

The FAN4800AUN is a direct functional substitute for the ML4824CP1 based on the following engineering criteria:

• Both components are manufactured by onsemi and operate in average current PFC mode with identical 16-PDIP pinout configuration, ensuring mechanical and electrical compatibility.
• The FAN4800AUN is classified as Active product status, providing assured long-term availability and manufacturing support, whereas the ML4824CP1 is obsolete.
• Both components comply with identical regulatory frameworks: REACH Unaffected and ECCN EAR99 classification, with matching HTSUS codes (8542.39.0001).
• The FAN4800AUN operates at 240kHz ~ 268kHz switching frequency compared to the ML4824CP1's 76kHz. This higher frequency requires circuit design verification to confirm compatibility with existing power stage components (inductors, capacitors, transformers).
• The FAN4800AUN features a wider supply voltage range (11V ~ 22V) that encompasses the ML4824CP1's requirement (10.5V ~ 13.2V), ensuring compatibility within the original application's voltage specification.
• The FAN4800AUN exhibits superior startup current characteristics (30 µA versus 700 µA), resulting in reduced quiescent power consumption.
• The FAN4800AUN supports extended operating temperature range (-40°C ~ 105°C) compared to the ML4824CP1 (0°C ~ 70°C), providing broader environmental capability.
• RoHS3 compliance of the FAN4800AUN aligns with modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the FAN4800AUN directly replace the ML4824CP1 without circuit modifications?

A: Both components share identical 16-PDIP pinout configuration and average current PFC control mode, enabling direct socket replacement. However, the FAN4800AUN operates at 240kHz ~ 268kHz versus the ML4824CP1's 76kHz switching frequency. Circuit design verification is required to confirm that power stage components (inductors, output capacitors, and transformer) are rated for the higher switching frequency to avoid thermal stress or efficiency degradation.

Q: What are the key differences between these two PFC controllers?

A: The primary differences are: (1) Product Status—FAN4800AUN is Active while ML4824CP1 is Obsolete; (2) Switching Frequency—FAN4800AUN operates at 240kHz ~ 268kHz versus 76kHz; (3) Startup Current—FAN4800AUN draws 30 µA versus 700 µA; (4) Supply Voltage Range—FAN4800AUN supports 11V ~ 22V versus 10.5V ~ 13.2V; (5) Operating Temperature—FAN4800AUN supports -40°C ~ 105°C versus 0°C ~ 70°C.

Q: Is the FAN4800AUN suitable for applications requiring the original 76kHz switching frequency?

A: The FAN4800AUN's minimum switching frequency is 240kHz, significantly higher than the ML4824CP1's 76kHz. Applications with frequency-dependent circuit designs (such as EMI filtering, transformer core selection, or inductor design) must be re-evaluated. The higher switching frequency may require component redesign or selection of alternative substitutes if 76kHz operation is mandatory.

Q: Are there any compliance or regulatory differences between these components?

A: Both components share identical regulatory compliance: REACH Unaffected status, EAR99 ECCN classification, and HTSUS code 8542.39.0001. The FAN4800AUN additionally carries RoHS3 compliance certification, meeting modern environmental standards. No regulatory barriers exist for substitution.

Q: What is the inventory status for these components?

A: The ML4824CP1 has 5,838 pieces available as new original stock. The FAN4800AUN has 35,200 pieces available as new original stock in tube packaging, providing significantly greater availability for ongoing production requirements.

Q: Can the FAN4800AUN be used in applications with temperature requirements below 0°C or above 70°C?

A: The FAN4800AUN supports -40°C ~ 105°C operating temperature range, which exceeds the ML4824CP1's 0°C ~ 70°C specification. Applications requiring operation outside the original part's temperature range can benefit from the FAN4800AUN's extended capability.