UCC2891DR Equivalent & Substitute Parts

Part Overview

The UCC2891DR is an active Flyback and Forward Converter Regulator controller manufactured by Texas Instruments, designed for positive, isolation-capable output applications in step-up/step-down DC-DC conversion topologies. This 16-SOIC surface mount integrated circuit functions as a transistor driver with integrated current limiting, enable control, on-time control, ramp, and soft start features. The device operates from a supply voltage range of 8.5V to 16V with a fixed switching frequency of 250kHz and maximum duty cycle of 70%. The UCC2891DR maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial power management applications. Equivalent substitute parts are identified based on matching electrical specifications, package compatibility, and functional capabilities.

Substiute Parts

UCC2891DR

Texas InstrumentsIn Stock: 4789UCC2891DR Datasheet

Current PartRFQ

UCC2893DR

Texas InstrumentsIn Stock: 10205UCC2893DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC2891DR are identified through strict parametric equivalence. The substitution logic is based on the following critical parameters that must match identically:

Package and Mounting: 16-SOIC surface mount package with 0.154" (3.90mm) width is mandatory for PCB compatibility and assembly process alignment.

Electrical Specifications: Supply voltage range (8.5V ~ 16V), switching frequency (250kHz), maximum duty cycle (70%), and output configuration (positive, isolation capable) must be identical.

Functional Topology: Flyback and forward converter capability with step-up/step-down function and single output phase configuration.

Control Architecture: Presence of current limit, enable, on-time control, ramp, and soft start features.

Operating Temperature Range: -40°C to 85°C ambient temperature rating.

Compliance and Certifications: RoHS3 compliance and MSL 1 rating ensure regulatory and manufacturing process compatibility.

The UCC2893DR meets all these criteria as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the UCC2891DR and UCC2893DR maintain active product status from Texas Instruments, ensuring continued manufacturing support and supply chain availability. Both devices carry identical RoHS3 compliance certification and MSL 1 rating, confirming suitability for standard surface mount assembly processes and long-term storage without moisture-related degradation concerns.

Selection between these parts should be based on current inventory availability and lead time requirements, as all electrical, functional, and compliance parameters are equivalent. The UCC2893DR currently maintains higher inventory levels (10,100 pieces) compared to the UCC2891DR (4,727 pieces), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the UCC2893DR be used as a direct replacement for the UCC2891DR in existing designs?

A: Yes. The UCC2893DR is a parametric equivalent with identical electrical specifications, package configuration, control features, and compliance ratings. Direct substitution is supported without circuit modification.

Q: Are there any package compatibility concerns when substituting between these parts?

A: No. Both parts use the identical 16-SOIC package with 0.154" (3.90mm) width, ensuring footprint compatibility and assembly process alignment on existing PCBs.

Q: Do both parts support the same operating temperature range?

A: Yes. Both the UCC2891DR and UCC2893DR operate across the identical -40°C to 85°C ambient temperature range, maintaining functional equivalence across industrial and commercial temperature specifications.

Q: Are there differences in regulatory compliance between these parts?

A: No. Both parts carry identical RoHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating, confirming equivalent regulatory and manufacturing process compatibility.

Q: What is the basis for substitution between these two controller ICs?

A: Substitution is based on matching supply voltage range (8.5V ~ 16V), switching frequency (250kHz), duty cycle rating (70%), topology (Flyback/Forward Converter), output configuration (positive, isolation capable), control features (current limit, enable, on-time control, ramp, soft start), and package specifications (16-SOIC surface mount).