UCC2817D Equivalent & Substitute Parts

Part Overview

The UCC2817D is a Power Factor Correction (PFC) controller IC manufactured by Texas Instruments, designed for average current mode operation across a switching frequency range of 6kHz to 220kHz. This device is packaged in a 16-SOIC surface mount configuration and operates with a supply voltage range of 12V to 17V.

The UCC2817D has reached Last Time Buy status, indicating that Texas Instruments has discontinued or will discontinue production. This necessitates identification of equivalent substitute components to maintain design continuity and ensure long-term supply chain reliability for applications currently utilizing this controller.

Substiute Parts

UCC2817D

Texas InstrumentsIn Stock: 2178UCC2817D Datasheet

Current PartRFQ

UCC28180DR

Texas InstrumentsIn Stock: 25251UCC28180DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC2817D is constrained by the following critical parameters:

• Operating Mode: The UCC2817D operates in Average Current mode. Substitute components must support this control methodology or provide functional equivalence in PFC control architecture.
• Switching Frequency Range: The device supports 6kHz to 220kHz operation. Substitute parts must accommodate the frequency requirements of the target application within their specified range.
• Supply Voltage: Operating range of 12V to 17V defines the input power requirements. Substitute devices must support compatible supply voltage specifications.
• Package Configuration: The 16-SOIC surface mount package determines PCB layout compatibility and thermal characteristics. Package changes require circuit board redesign.
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status are mandatory for applications subject to these regulations.

The UCC28180DR is identified as a manufacturer-recommended substitute. However, this device operates in Continuous Conduction (CCM) mode rather than Average Current mode, represents a different control architecture, and is packaged in an 8-SOIC configuration. These differences require detailed application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The UCC28180DR is designated as the manufacturer-recommended substitute and maintains Active product status, ensuring continued availability and supply chain support. Both devices are ROHS3 compliant and carry MSL Level 1 ratings, meeting regulatory requirements for restricted substance compliance.

The UCC28180DR operates at higher maximum supply voltage (21V versus 12V-17V) and extends the upper operating temperature limit to 125°C compared to 85°C for the UCC2817D. The UCC28180DR also features lower startup current (75 µA versus 150 µA).

The fundamental architectural difference between Average Current mode (UCC2817D) and Continuous Conduction mode (UCC28180DR) requires verification that the substitute device's control methodology is compatible with the existing power stage design, feedback network, and application-specific performance requirements.

Frequently Asked Questions (FAQ)

Q: Can the UCC28180DR be used as a direct pin-for-pin replacement for the UCC2817D?

A: No. The UCC28180DR is packaged in 8-SOIC configuration while the UCC2817D uses 16-SOIC. The pin count and pinout differ, requiring circuit board modification and redesign of the control signal routing.

Q: What is the primary difference between Average Current mode and Continuous Conduction (CCM) mode?

A: Average Current mode (UCC2817D) regulates the average inductor current, while Continuous Conduction mode (UCC28180DR) operates with continuous current flow through the power stage inductor. These represent different control architectures with distinct feedback and compensation requirements.

Q: Are both devices suitable for the same supply voltage range?

A: No. The UCC2817D operates with 12V to 17V supply voltage, while the UCC28180DR requires 21V supply. Applications designed for the lower voltage range of the UCC2817D require supply circuit modification to use the UCC28180DR.

Q: Does the UCC28180DR support the full frequency range of the UCC2817D?

A: The UCC28180DR supports 18kHz to 250kHz switching frequency, which overlaps with but does not fully cover the 6kHz to 220kHz range of the UCC2817D. Applications requiring operation below 18kHz cannot use the UCC28180DR without design modification.

Q: Are there compliance or certification differences between these devices?

A: Both devices are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 ratings. No compliance or certification barriers exist between the two components.