FAN4800CSMY Equivalent & Substitute Parts

Part Overview

The FAN4800CSMY is a Power Factor Correction (PFC) controller IC manufactured by onsemi, designed for average current mode operation at 240kHz to 268kHz switching frequency. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. The FAN4800 series provides PFC functionality in applications requiring input voltage ranges of 11V to 26V with integrated current startup capability of 30µA.

Substiute Parts

FAN4800CSMY

onsemiIn Stock: 1527FAN4800CSMY Datasheet

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FAN4800AUM

onsemiIn Stock: 17747FAN4800AUM Datasheet

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FAN4800AUN

onsemiIn Stock: 35236FAN4800AUN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FAN4800CSMY is determined by the following critical parameters:

Core Functional Parameters (Must Match):

• Average Current mode operation
• Switching frequency range: 240kHz ~ 268kHz
• Startup current: 30 µA
• Operating temperature range: -40°C ~ 105°C
• Base product number: FAN4800

Allowable Variation Parameters:

• Supply voltage range (11V ~ 22V is acceptable for 11V ~ 26V applications operating within the lower range)
• Mounting type (Surface Mount or Through Hole)
• Package configuration (16-SOIC or 16-DIP)
• Product status (Active substitutes acceptable for Obsolete main part)
• MSL rating (may vary based on packaging)

The FAN4800AUM and FAN4800AUN maintain functional equivalence through identical mode, frequency, and thermal specifications while differing in packaging and supply voltage upper limit.

Parameter Comparison

Engineering Selection Recommendations

FAN4800AUM Selection Criteria:

• Direct surface mount replacement for FAN4800CSMY
• Identical package footprint (16-SOIC)
• Active product status ensures long-term availability
• ROHS3 compliant with MSL 3 rating (168 Hours)
• Supply voltage specification of 11V ~ 22V suitable for applications not requiring the full 26V upper limit
• Recommended for new designs and production continuity

FAN4800AUN Selection Criteria:

• Through-hole alternative for applications requiring DIP package mounting
• Active product status with highest inventory availability
• Identical electrical specifications within the 11V ~ 22V supply range
• MSL Not Applicable due to through-hole packaging
• Suitable for legacy board designs or applications with through-hole assembly requirements

Both substitutes maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original FAN4800CSMY.

Frequently Asked Questions (FAQ)

Q: Can FAN4800AUM directly replace FAN4800CSMY in existing designs? A: Yes, for applications operating within the 11V ~ 22V supply voltage range. The FAN4800AUM maintains identical package footprint (16-SOIC), functional mode, switching frequency, and thermal specifications. Pin-to-pin compatibility is maintained.

Q: What is the primary difference between FAN4800AUM and FAN4800AUN? A: The FAN4800AUM is a surface mount device in 16-SOIC package, while FAN4800AUN is a through-hole device in 16-DIP package. Both share identical electrical specifications. Selection depends on PCB assembly method and mounting requirements.

Q: Is the supply voltage difference between FAN4800CSMY (11V ~ 26V) and substitutes (11V ~ 22V) a compatibility issue? A: The reduced upper limit of 22V in substitute parts is compatible with applications designed for the original part if the actual operating supply voltage does not exceed 22V. Applications requiring operation above 22V require design review.

Q: Are all three parts ROHS3 compliant? A: Yes. FAN4800CSMY, FAN4800AUM, and FAN4800AUN are all ROHS3 compliant. MSL ratings differ based on packaging type: FAN4800CSMY has MSL 1, FAN4800AUM has MSL 3, and FAN4800AUN has MSL Not Applicable.

Q: Why is FAN4800CSMY listed as obsolete? A: Obsolete status indicates the part is no longer manufactured. FAN4800AUM and FAN4800AUN are active alternatives from the same FAN4800 series, providing functional continuity for existing applications.