UCC2818PW Equivalent & Substitute Parts

Part Overview

The UCC2818PW 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 operates from a 12V to 17V supply and is packaged in a 16-TSSOP surface mount configuration. The UCC2818PW is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications requiring PFC control functionality.

Substiute Parts

UCC2818PW

Texas InstrumentsIn Stock: 1096UCC2818PW Datasheet

Current PartRFQ

UCC28180DR

Texas InstrumentsIn Stock: 25251UCC28180DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC2818PW is determined by functional compatibility within the PFC controller category. The UCC28180DR qualifies as a manufacturer-recommended substitute based on the following criteria:

Both devices are Texas Instruments PFC controller ICs designed for surface mount applications. The UCC28180DR operates in Continuous Conduction (CCM) mode with a switching frequency range of 18kHz to 250kHz, which overlaps with the UCC2818PW's operating range. Both devices maintain ROHS3 compliance and operate across industrial temperature ranges. The UCC28180DR is packaged in 8-SOIC format, which differs from the 16-TSSOP package of the UCC2818PW; however, this represents a functional substitution path for designs that can accommodate package migration. The UCC28180DR is classified as Active product status, ensuring continued availability and support.

Key parameters enabling substitution: PFC controller functionality, surface mount technology, industrial temperature operation, ROHS3 compliance, and Texas Instruments manufacturer continuity.

Parameter Comparison

Engineering Selection Recommendations

The UCC28180DR is the manufacturer-recommended substitute for the UCC2818PW. Selection of this substitute is supported by active product status, ensuring long-term availability and manufacturing support. Both devices maintain ROHS3 compliance and are manufactured by Texas Instruments, providing regulatory consistency and supply chain continuity.

The UCC28180DR offers improved moisture sensitivity characteristics (MSL 1 versus MSL 2) and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), providing enhanced reliability margins for industrial applications. The device operates at lower startup current (75 µA versus 150 µA), reducing quiescent power consumption.

Design migration from UCC2818PW to UCC28180DR requires evaluation of package compatibility, as the substitute uses 8-SOIC packaging instead of 16-TSSOP. The operational mode transition from Average Current to Continuous Conduction (CCM) and the supply voltage specification change (21V versus 12V-17V range) necessitate circuit topology review to ensure functional equivalence within the target application.

Frequently Asked Questions (FAQ)

Q: Can the UCC28180DR directly replace the UCC2818PW without PCB modifications?

A: Direct pin-for-pin replacement is not possible due to package differences (8-SOIC versus 16-TSSOP). PCB layout redesign is required. Additionally, the operational mode difference (CCM versus Average Current) may require circuit topology adjustments.

Q: What are the key differences between Average Current mode and Continuous Conduction (CCM) mode?

A: Average Current mode (UCC2818PW) regulates the average inductor current, while Continuous Conduction mode (UCC28180DR) operates with continuous inductor current flow. These modes affect circuit design, component selection, and control loop characteristics.

Q: Is the UCC28180DR suitable for applications originally designed for 12V-17V supply operation?

A: The UCC28180DR specifies 21V supply voltage, which differs from the UCC2818PW range. Circuit design review is necessary to confirm compatibility with the target supply voltage specification.

Q: What is the significance of the MSL rating difference?

A: The UCC28180DR has MSL 1 (Unlimited shelf life) compared to UCC2818PW MSL 2 (1 Year). This indicates improved moisture resistance and extended storage capability for the substitute device.

Q: Are both devices RoHS compliant?

A: Yes, both the UCC2818PW and UCC28180DR are ROHS3 compliant, ensuring regulatory consistency for applications requiring RoHS certification.

Q: What is the product status implication for long-term design decisions?

A: The UCC2818PW is Last Time Buy (end-of-life), while the UCC28180DR is Active. For new designs or long-term production, the UCC28180DR provides assured availability and manufacturer support.