FAN7930MX PFC Controller Equivalent & Substitute Parts

Part Overview

The FAN7930MX is a Power Factor Correction (PFC) controller IC manufactured by onsemi, designed for Critical Conduction (CRM) mode operation at switching frequencies between 250kHz and 350kHz. This 8-SOIC surface mount device operates with a supply voltage range of 13V to 20V and a startup current of 120µA, suitable for power management applications requiring PFC functionality.

The FAN7930MX is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this controller.

Substiute Parts

FAN7930MX

onsemiIn Stock: 2109FAN7930MX Datasheet

Current PartRFQ

FAN7930CMX-G

onsemiIn Stock: 100324FAN7930CMX-G Datasheet

DirectRFQ

NCP1611ADR2G

onsemiIn Stock: 60243NCP1611ADR2G Datasheet

SimilarRFQ

NCP1611BDR2G

onsemiIn Stock: 38948NCP1611BDR2G Datasheet

SimilarRFQ

NCP1612ADR2G

onsemiIn Stock: 2922NCP1612ADR2G Datasheet

SimilarRFQ

NCP1612BDR2G

onsemiIn Stock: 3381NCP1612BDR2G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FAN7930MX is determined by the following critical parameters:

Direct Functional Equivalent:

• FAN7930CMX-G: Identical base product number (FAN7930), same CRM mode, identical switching frequency range (250kHz ~ 350kHz), identical supply voltage range (13V ~ 20V), identical startup current (120µA), and identical 8-SOIC package. This part is active and represents the direct replacement with enhanced availability.

Similar Functional Alternatives:

• NCP1611ADR2G, NCP1611BDR2G, NCP1612ADR2G, NCP1612BDR2G: These parts operate in both Current Controlled Frequency Foldback (CCFF) and Critical Conduction (CRM) modes, supporting the CRM operation required by the original design. However, they differ in the following parameters:
  • Supply voltage range: 9.5V ~ 35V (broader than FAN7930MX)
  • Startup current: 20µA (lower than FAN7930MX)
  • Package variations: NCP1611 series in 8-SOIC; NCP1612 series in 10-SOIC
  • Switching frequency: Not specified for NCP series

Substitution with NCP series parts requires verification that the design can accommodate the broader supply voltage range and different package pinout (for 10-SOIC variants).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: FAN7930CMX-G

FAN7930CMX-G is the direct functional equivalent and preferred substitute. It maintains identical electrical specifications (CRM mode, 250kHz ~ 350kHz switching frequency, 13V ~ 20V supply voltage, 120µA startup current) and identical 8-SOIC package configuration. The part is active with substantial inventory availability (100,300 pcs), ensuring supply chain continuity. RoHS3 compliance provides regulatory alignment for new designs and production.

Secondary Alternatives: NCP1611ADR2G, NCP1611BDR2G, NCP1612ADR2G, NCP1612BDR2G

These parts support CRM operation and are active with good availability. Selection among these alternatives requires design-level evaluation:

• NCP1611 series (8-SOIC package): Pin-compatible with FAN7930MX. Suitable for designs where the broader supply voltage range (9.5V ~ 35V) and lower startup current (20µA) do not conflict with circuit requirements.

• NCP1612 series (10-SOIC package): Requires PCB layout modification due to package change from 8-SOIC to 10-SOIC. Suitable only when design flexibility permits package substitution.

All substitute parts carry ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can FAN7930CMX-G be used as a direct drop-in replacement for FAN7930MX?

A: Yes. FAN7930CMX-G is electrically and mechanically identical to FAN7930MX. It operates in the same CRM mode, maintains the same switching frequency range (250kHz ~ 350kHz), supply voltage range (13V ~ 20V), and uses the identical 8-SOIC package. No circuit or layout modifications are required.

Q: What is the key difference between FAN7930MX and the NCP1611/NCP1612 series?

A: The primary differences are: (1) Supply voltage range: NCP series supports 9.5V ~ 35V versus FAN7930MX at 13V ~ 20V; (2) Startup current: NCP series at 20µA versus FAN7930MX at 120µA; (3) Package: NCP1611 maintains 8-SOIC compatibility, while NCP1612 uses 10-SOIC requiring layout changes. Both NCP series support CRM mode operation.

Q: Can NCP1611ADR2G or NCP1611BDR2G replace FAN7930MX without PCB modifications?

A: NCP1611 series parts use the same 8-SOIC package as FAN7930MX, allowing pin-compatible substitution. However, the broader supply voltage range (9.5V ~ 35V) and different startup current (20µA) must be evaluated against circuit design requirements to ensure functional compatibility.

Q: Why do NCP1612ADR2G and NCP1612BDR2G require different consideration?

A: NCP1612 series uses a 10-SOIC package instead of the 8-SOIC package used by FAN7930MX. This package change requires PCB layout modification and is not a direct pin-compatible substitution.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference?

A: FAN7930MX and FAN7930CMX-G have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. NCP1611 series has MSL 2 (1 Year), requiring controlled storage conditions. NCP1612 series has MSL 1 (Unlimited). MSL 2 parts require more stringent handling and storage protocols.

Q: Are all substitute parts RoHS3 compliant?

A: FAN7930CMX-G and all NCP series parts (NCP1611ADR2G, NCP1611BDR2G, NCP1612ADR2G, NCP1612BDR2G) are ROHS3 compliant. The original FAN7930MX does not specify RoHS status.