UCC2818APW Equivalent & Substitute Parts

Part Overview

The UCC2818APW is a Power Factor Correction (PFC) controller IC manufactured by Texas Instruments, designed for average current mode operation in the 6kHz to 220kHz switching frequency range. This device is classified as Last Time Buy, indicating it is no longer in active production. The UCC2818APW operates with a 12V to 17V supply voltage and is packaged in a 16-TSSOP surface mount configuration.

Finding equivalent or substitute parts for the UCC2818APW is necessary due to its Last Time Buy status. Organizations requiring PFC controller functionality must identify compatible alternatives to ensure continuity of supply and support for new designs or production runs.

Substiute Parts

UCC2818APW

Texas InstrumentsIn Stock: 2224UCC2818APW Datasheet

Current PartRFQ

UCC28180DR

Texas InstrumentsIn Stock: 25251UCC28180DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC2818APW is constrained by the following critical parameters:

• Control Mode: The UCC2818APW operates in Average Current mode. Substitute parts must support this operational mode or provide equivalent current regulation characteristics.
• Switching Frequency Range: The device operates across 6kHz to 220kHz. Substitute parts must accommodate this frequency range or overlap significantly within it.
• Supply Voltage: Operating range of 12V to 17V defines the input power requirements. Substitute parts must support this voltage specification.
• Startup Current: 150 µA startup current is a design parameter that affects circuit initialization.
• Package and Mounting: Surface mount configuration in 16-TSSOP package defines physical and electrical interface requirements.
• Regulatory Compliance: ROHS3 compliance and REACH Unaffected status are mandatory for equivalent parts.

The UCC28180DR is identified as a manufacturer-recommended substitute. However, this part operates in Continuous Conduction (CCM) mode rather than Average Current mode, represents a different package type (8-SOIC), and has different electrical specifications. These differences indicate that direct functional equivalence is not maintained.

Parameter Comparison

Engineering Selection Recommendations

The UCC28180DR is listed as a manufacturer-recommended substitute for the UCC2818APW. Both devices are manufactured by Texas Instruments and maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements.

The UCC28180DR is currently in Active product status, ensuring ongoing availability and support compared to the Last Time Buy status of the UCC2818APW.

Selection of the UCC28180DR requires evaluation of the following specification differences:

• Control mode differs (CCM versus Average Current)
• Supply voltage specification differs (21V versus 12V ~ 17V range)
• Switching frequency range differs (18kHz ~ 250kHz versus 6kHz ~ 220kHz)
• Package configuration differs (8-SOIC versus 16-TSSOP)
• Operating temperature range differs (-40°C ~ 125°C versus -40°C ~ 85°C)

These differences necessitate circuit redesign and validation to confirm functional compatibility within the target application.

Frequently Asked Questions (FAQ)

Q: Can the UCC28180DR be used as a direct pin-for-pin replacement for the UCC2818APW?

A: No. The UCC28180DR uses an 8-SOIC package while the UCC2818APW uses a 16-TSSOP package. Pin count and pinout differ, requiring circuit board redesign.

Q: What is the primary functional difference between these two parts?

A: The UCC2818APW operates in Average Current mode, while the UCC28180DR operates in Continuous Conduction (CCM) mode. These represent different PFC control methodologies with distinct circuit requirements and performance characteristics.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the UCC2818APW and UCC28180DR are ROHS3 compliant and REACH Unaffected, meeting current regulatory requirements.

Q: What is the significance of the Last Time Buy status for the UCC2818APW?

A: Last Time Buy status indicates that Texas Instruments will no longer manufacture this part after existing inventory is depleted. New designs should transition to active products such as the UCC28180DR.

Q: Does the UCC28180DR support the same supply voltage range as the UCC2818APW?

A: No. The UCC2818APW operates with 12V to 17V supply voltage, while the UCC28180DR specifies 21V supply voltage. Circuit design must accommodate this difference.

Q: What is the switching frequency overlap between these two devices?

A: The UCC2818APW operates from 6kHz to 220kHz, while the UCC28180DR operates from 18kHz to 250kHz. The overlap range is 18kHz to 220kHz.