UC3854NG4 Equivalent & Substitute Parts

Part Overview

The UC3854NG4 is a Power Factor Correction (PFC) controller IC manufactured by Texas Instruments, designed for average current mode operation at 200kHz switching frequency. This device is classified as a Power Management PMIC and is packaged in a 16-PDIP through-hole configuration.

The UC3854NG4 has been discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

UC3854NG4

Texas InstrumentsIn Stock: 1050UC3854NG4 Datasheet

Current PartRFQ

UC3854N

Texas InstrumentsIn Stock: 13695UC3854N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UC3854NG4 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

• Identical PFC control mode (Average Current)
• Identical switching frequency (200kHz)
• Identical supply voltage range (14.5V ~ 30V)
• Identical startup current specification (1.5 mA)
• Identical operating temperature range (0°C ~ 70°C)
• Identical package type (16-PDIP through-hole)
• Identical pin configuration and functional pinout

The UC3854N meets all substitution criteria and is classified as a direct equivalent to the UC3854NG4.

Parameter Comparison

Engineering Selection Recommendations

The UC3854N is the direct substitute for the UC3854NG4. Both parts share identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the UC3854NG4 is discontinued, while the UC3854N remains in active production with significantly higher inventory availability (13,602 units in stock versus 987 units for the discontinued variant).

For new designs and production applications, the UC3854N is the appropriate selection. For legacy system maintenance or repair, the UC3854N provides functional and mechanical compatibility with the original UC3854NG4 specification.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the UC3854N be used as a direct replacement for the UC3854NG4?

A: Yes. The UC3854N is a direct electrical and mechanical equivalent. All functional parameters, pin configurations, and performance specifications are identical. The parts are interchangeable in circuit applications.

Q: What is the difference between UC3854NG4 and UC3854N?

A: The UC3854NG4 and UC3854N are functionally identical PFC controller ICs from Texas Instruments. The primary difference is product status: UC3854NG4 is discontinued, while UC3854N is in active production. The packaging designation (NG4 versus N) reflects different manufacturing batches or distribution channels, but electrical performance and pinout are equivalent.

Q: Are there any package or pinout differences?

A: No. Both parts use the 16-PDIP (0.300", 7.62mm) through-hole package with identical pin assignments and functional layout. Direct PCB substitution is possible without design modification.

Q: What compliance certifications apply to the UC3854N?

A: The UC3854N is ROHS3 compliant and REACH unaffected, matching the compliance profile of the UC3854NG4. Both parts meet industrial and commercial regulatory requirements.

Q: Is the UC3854N suitable for new product designs?

A: Yes. The UC3854N is in active production with robust inventory availability, making it the recommended choice for new designs requiring a 200kHz average current mode PFC controller in a 16-PDIP package.