UCC2961D Equivalent & Substitute Parts

Part Overview

The UCC2961D is a forward converter regulator controller IC manufactured by Texas Instruments, designed for positive, isolation-capable DC-DC conversion applications. This 14-SOIC surface mount device operates as a transistor driver with step-up/step-down functionality across a supply voltage range of 8V to 19V. The product is currently in Last Time Buy status, making identification of compatible substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

UCC2961D

Texas InstrumentsIn Stock: 2988UCC2961D Datasheet

Current PartRFQ

UCC2960D

Texas InstrumentsIn Stock: 3280UCC2960D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC2961D is limited by its specific forward converter topology and 14-SOIC package configuration. The UCC2960D is identified as a manufacturer-recommended substitute based on the following critical parameters:

Substitution Criteria:

• Supply voltage range: 8V ~ 19V (matched)
• Switching frequency: Up to 400kHz (matched)
• Duty cycle: 72% (matched)
• Soft Start control feature (matched)
• Frequency Control feature (matched)
• RoHS3 compliance (matched)
• MSL rating: 2 (1 Year) (matched)
• Surface mount technology (matched)

The UCC2960D operates within the same electrical operating parameters as the UCC2961D, enabling functional equivalence in applications where the specified electrical characteristics are the primary selection criteria.

Parameter Comparison

Engineering Selection Recommendations

The UCC2961D is designated Last Time Buy status, necessitating evaluation of the UCC2960D as a functional alternative. Both devices maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental consistency. The UCC2960D provides an extended operating temperature range (-55°C ~ 150°C junction temperature versus -40°C ~ 85°C ambient for the UCC2961D), offering broader thermal performance capability. Both devices are manufactured by Texas Instruments and share core electrical specifications including supply voltage range, switching frequency, and duty cycle parameters. Package geometry remains consistent at 0.154" width, supporting direct PCB layout compatibility. Selection between these devices should be based on specific application requirements regarding pin count, control feature availability, and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the UCC2960D directly replace the UCC2961D in existing designs?

A: The UCC2960D shares critical electrical parameters with the UCC2961D, including supply voltage range (8V ~ 19V), switching frequency (400kHz), and duty cycle (72%). However, the UCC2960D uses an 8-SOIC package versus the UCC2961D's 14-SOIC package. PCB layout modifications are required to accommodate the different pin configuration and package footprint.

Q: What are the key differences between these devices?

A: The primary differences are package type (14-SOIC versus 8-SOIC), operating temperature range (UCC2960D extends to -55°C ~ 150°C junction temperature), and control features (UCC2961D includes an Enable feature not listed for UCC2960D). Both devices support frequency control and soft start functionality.

Q: Are both devices RoHS compliant?

A: Yes, both the UCC2961D and UCC2960D are ROHS3 compliant with identical MSL ratings of 2 (1 Year), ensuring regulatory consistency for procurement and assembly processes.

Q: What is the significance of the Last Time Buy status for the UCC2961D?

A: Last Time Buy status indicates that the UCC2961D will no longer be manufactured after a specified date. Designers should evaluate the UCC2960D or other alternatives to ensure long-term component availability for production and field support.

Q: Do both devices support the same control features?

A: Both devices support Frequency Control and Soft Start features. The UCC2961D additionally includes an Enable control feature. Verify that your application does not depend on the Enable function before selecting the UCC2960D as a substitute.