UC2872Q Equivalent & Substitute Parts

Part Overview

The UC2872Q is a ballast controller IC manufactured by Texas Instruments, designed for resonant lamp ballast applications operating in the 57kHz to 78kHz frequency range. This device is classified as a Power Management (PMIC) component and is packaged in a 20-PLCC (9x9) surface mount configuration.

The UC2872Q has reached obsolete product status. 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 ballast controller.

Substiute Parts

UC2872Q

Texas InstrumentsIn Stock: 719UC2872Q Datasheet

Current PartRFQ

UC2872DW

UnitrodeIn Stock: 1293UC2872DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UC2872Q are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Matching Parameters:

• Base product number (UC2872)
• Frequency range (57kHz ~ 78kHz)
• Voltage supply range (4.5V ~ 24V)
• Supply current (6 mA)
• Operating temperature range (-40°C ~ 85°C)
• Ballast controller functionality
• Surface mount technology

Package Consideration: The UC2872Q uses a 20-PLCC (9x9) package. Substitute parts may use alternative surface mount packages (such as 16-SOIC) provided that the electrical specifications and functional performance remain equivalent and the physical footprint can be accommodated in the target application.

Parameter Comparison

Engineering Selection Recommendations

The UC2872DW is identified as the manufacturer-recommended substitute for the UC2872Q. Both devices share the same base product number (UC2872) and are functionally equivalent ballast controllers with identical electrical specifications across all critical parameters: frequency range, supply voltage, supply current, and operating temperature.

The UC2872DW offers the advantage of active product status, ensuring continued availability and supply chain support. The UC2872Q is obsolete, making the UC2872DW the appropriate choice for new designs or ongoing production requirements.

Both parts maintain equivalent regulatory compliance, with matching ECCN and HTSUS classifications. The primary design consideration is the package change from 20-PLCC (9x9) to 16-SOIC, which requires PCB layout modification but does not affect electrical performance or functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the UC2872DW directly replace the UC2872Q without circuit modifications?

A: The UC2872DW is electrically equivalent to the UC2872Q and will function identically in the ballast controller application. However, the package change from 20-PLCC to 16-SOIC requires PCB footprint redesign. Pin-to-pin functional mapping must be verified against the respective datasheets to ensure correct signal routing.

Q: Why is the UC2872Q obsolete?

A: The UC2872Q has reached end-of-life status. The UC2872DW, manufactured by Unitrode (now part of Texas Instruments), represents the active continuation of this ballast controller product line.

Q: Are there any compliance or certification differences between these parts?

A: Both the UC2872Q and UC2872DW maintain identical regulatory classifications: ROHS3 compliance, EAR99 export control, and 8542.39.0001 HTSUS code. No compliance barriers exist for substitution.

Q: What is the impact of the package change from 20-PLCC to 16-SOIC?

A: The 16-SOIC package is smaller and uses a different lead configuration than the 20-PLCC. This requires PCB layout modification, including new footprint design and trace routing. The electrical functionality remains unchanged, but physical board space requirements are reduced.

Q: Is the UC2872DW the only available substitute?

A: Based on the provided substitute list, the UC2872DW is the identified equivalent part. Substitution decisions should be based on the matching electrical parameters and base product number (UC2872) as specified in this reference.