UCC28512N Equivalent & Substitute Parts

Part Overview

The UCC28512N 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 obsolete, which necessitates identification of equivalent substitute components for ongoing design requirements and production continuity. The UCC28512N operates across a 9.7V to 18V supply voltage range and supports through-hole mounting in a 20-DIP package configuration.

Substiute Parts

UCC28512N

Texas InstrumentsIn Stock: 786UCC28512N Datasheet

Current PartRFQ

UCC28512DW

UnitrodeIn Stock: 4484UCC28512DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UCC28512N is determined by the following critical parameters:

• Base Product Number: UCC28512 (core functional equivalence)
• Mode: Average Current (control methodology)
• Frequency - Switching: 200kHz (operational frequency)
• Current - Startup: 100 µA (initialization current)
• Voltage - Supply: 9.7V ~ 18V (power supply range)
• Operating Temperature: -40°C ~ 105°C (thermal operating window)

The UCC28512DW qualifies as a manufacturer-recommended substitute because it maintains identical electrical specifications across all critical parameters. The primary difference is the package configuration: the substitute transitions from through-hole (20-DIP) to surface-mount (20-SOIC) technology, which requires PCB layout modification but preserves all functional and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The UCC28512DW is the manufacturer-recommended substitute for the obsolete UCC28512N. Both components share identical electrical specifications and regulatory compliance profiles (ROHS3 compliant, EAR99 classification). The UCC28512DW maintains active product status, ensuring long-term availability and supply chain continuity.

The transition from through-hole to surface-mount packaging requires PCB redesign. The 20-DIP footprint must be replaced with a 20-SOIC footprint. Pin-to-pin electrical compatibility is maintained, allowing direct functional substitution once the physical layout is adapted.

Frequently Asked Questions (FAQ)

Q: Can the UCC28512DW be used as a direct pin-for-pin replacement for the UCC28512N?

A: The UCC28512DW is electrically equivalent but requires PCB layout modification. Both devices use 20-pin packages with identical pin assignments, but the physical footprints differ: 20-DIP (through-hole) versus 20-SOIC (surface-mount). Direct soldering is not possible without PCB redesign.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching the base product number (UCC28512), control mode (Average Current), switching frequency (200kHz), startup current (100 µA), supply voltage range (9.7V ~ 18V), and operating temperature range (-40°C ~ 105°C).

Q: Why is the UCC28512N classified as obsolete?

A: The UCC28512N is no longer in active production. The UCC28512DW represents the current active equivalent in the UCC28512 product family.

Q: Are there compliance or certification differences between the two parts?

A: Both components share identical regulatory classifications: ROHS3 compliant, EAR99 export control, and HTSUS code 8542.39.0001. No compliance differences exist.

Q: What is the impact of switching from through-hole to surface-mount packaging?

A: Surface-mount technology (20-SOIC) offers improved thermal performance and reduced PCB real estate compared to through-hole (20-DIP). The electrical functionality remains unchanged. PCB assembly processes must be adapted accordingly.