FAN7528N Equivalent & Substitute Parts

Part Overview

The FAN7528N is a Power Factor Correction (PFC) controller IC manufactured by onsemi, designed for Critical Conduction (CRM) and Discontinuous (Transition) mode operation in 8-DIP packaging. This component is classified as Obsolete, making equivalent and substitute parts necessary for ongoing system support and new design considerations. The FAN7528N operates within a 12V to 23V supply range and supports startup currents of 40 µA across an operating temperature range of -40°C to 125°C.

Substiute Parts

FAN7528N

onsemiIn Stock: 1163FAN7528N Datasheet

Current PartRFQ

MC33262PG

onsemiIn Stock: 81159MC33262PG Datasheet

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L6561

STMicroelectronicsIn Stock: 16259L6561 Datasheet

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UCC28050P

Texas InstrumentsIn Stock: 4245UCC28050P Datasheet

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UCC28051P

UnitrodeIn Stock: 2521UCC28051P Datasheet

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UCC38050P

Texas InstrumentsIn Stock: 1470UCC38050P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FAN7528N is determined by the following critical parameters:

• Package Compatibility: All substitute parts must use 8-DIP (0.300", 7.62mm) through-hole packaging to ensure direct PCB compatibility
• Functional Mode: Substitute parts must support either Critical Conduction (CRM) or Discontinuous (Transition) mode operation, or both
• Voltage Supply Range: The substitute must operate within or encompass the 12V to 23V supply range of the FAN7528N
• Operating Temperature Range: The substitute must support the required temperature envelope, with preference for parts covering -40°C to 125°C
• Startup Current: Startup current specifications must be compatible with the system design requirements

The following parts meet these substitution criteria:

• MC33262PG (onsemi): Critical Conduction (CRM) mode, 12V ~ 28V supply, -40°C ~ 105°C
• L6561 (STMicroelectronics): Discontinuous (Transition) mode, 11V ~ 18V supply, -25°C ~ 125°C
• UCC28050P (Texas Instruments): Discontinuous (Transition) mode, 200kHz switching, 15.4V ~ 18V supply, -40°C ~ 105°C
• UCC28051P (Unitrode): Discontinuous (Transition) mode, 200kHz switching, 12V ~ 18V supply, -40°C ~ 105°C
• UCC38050P (Texas Instruments): Discontinuous (Transition) mode, 200kHz switching, 15.4V ~ 18V supply, 0°C ~ 70°C

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs: UCC28051P is the preferred substitute, offering Active product status with Discontinuous (Transition) mode operation, 200kHz switching frequency, and a 12V ~ 18V supply range that encompasses the lower end of the FAN7528N specification. Operating temperature range of -40°C to 105°C covers most industrial applications.

For Extended Temperature Range Requirements: L6561 supports the full -25°C to 125°C operating temperature range, matching the upper temperature capability of the FAN7528N. This part is suitable for applications requiring maximum thermal performance, though it is classified as Not For New Designs.

For Higher Supply Voltage Applications: MC33262PG extends the supply voltage range to 28V, providing additional headroom for systems operating above 23V. This onsemi part maintains Critical Conduction (CRM) mode compatibility and is available in high inventory quantities.

For Last Time Buy Scenarios: UCC28050P and UCC38050P are both classified as Last Time Buy. UCC28050P operates across -40°C to 105°C, while UCC38050P is limited to 0°C to 70°C. Both support 200kHz switching frequency and 15.4V ~ 18V supply range.

Frequently Asked Questions (FAQ)

Q: Can FAN7528N be directly replaced with MC33262PG? A: Yes, both parts use 8-DIP packaging and support through-hole mounting. MC33262PG operates in Critical Conduction (CRM) mode with a 12V ~ 28V supply range, which encompasses the FAN7528N specification of 12V ~ 23V. However, MC33262PG has a higher startup current (250 µA vs. 40 µA) and lower maximum operating temperature (105°C vs. 125°C).

Q: Which substitute offers the best compatibility for new designs? A: UCC28051P is the recommended choice for new designs, as it maintains Active product status. It operates in Discontinuous (Transition) mode with 200kHz switching, 12V ~ 18V supply range, and -40°C to 105°C operating temperature. The 75 µA startup current is higher than the FAN7528N but acceptable for most applications.

Q: Are all substitutes available in the same package? A: Yes, all listed substitutes use 8-DIP (0.300", 7.62mm) through-hole packaging, ensuring direct PCB compatibility without layout modifications.

Q: What is the difference between Critical Conduction (CRM) and Discontinuous (Transition) mode? A: The FAN7528N supports both modes. MC33262PG operates exclusively in CRM mode, while L6561, UCC28050P, UCC28051P, and UCC38050P operate in Discontinuous (Transition) mode. Mode selection depends on system topology and efficiency requirements.

Q: Can UCC38050P be used in applications requiring -40°C operation? A: No, UCC38050P operates only from 0°C to 70°C, making it unsuitable for applications requiring -40°C minimum temperature. UCC28050P or UCC28051P are better choices for extended low-temperature operation.

Q: What is the significance of the startup current difference? A: The FAN7528N has a 40 µA startup current, while most substitutes range from 50 µA to 250 µA. Higher startup current may affect system power consumption during initialization. MC33262PG's 250 µA startup current is notably higher and should be evaluated for low-power applications.

Q: Are all substitutes RoHS compliant? A: MC33262PG, L6561, UCC28050P, and UCC38050P are ROHS3 Compliant. UCC28051P compliance status is not specified in the provided data.