UCC28221DR Equivalent & Substitute Parts

Part Overview

The UCC28221DR is an offline switch flyback converter IC manufactured by Texas Instruments, designed for isolated power management applications. This device operates at 2MHz switching frequency with integrated current limiting and overvoltage protection. The UCC28221DR is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. The active substitute UCC28221D provides functional equivalence while maintaining current product availability.

Substiute Parts

UCC28221DR

Texas InstrumentsIn Stock: 949UCC28221DR Datasheet

Current PartRFQ

UCC28221D

Texas InstrumentsIn Stock: 1957UCC28221D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC28221DR with the UCC28221D is based on electrical and mechanical parameter equivalence. Both devices share identical specifications across all critical functional parameters: flyback topology, isolated output configuration, supply voltage range (8.4V ~ 14.5V), startup voltage (13V), switching frequency (2MHz), duty cycle (75%), fault protection mechanisms (current limiting and overvoltage protection), soft start control, operating temperature range (-55°C ~ 150°C), and package configuration (16-SOIC surface mount).

The primary distinction between these parts is product status: UCC28221DR is obsolete while UCC28221D is active. Both maintain equivalent RoHS3 compliance, moisture sensitivity level 1, and identical base product number (UCC28221), confirming their functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The UCC28221D is the direct substitute for the obsolete UCC28221DR. Both parts maintain full electrical and mechanical equivalence, with identical performance specifications across all functional parameters. The UCC28221D is preferred for new designs and production continuity due to its active product status and current availability.

Both parts comply with ROHS3 regulations and carry identical moisture sensitivity classification (MSL 1), ensuring equivalent handling and storage requirements. The UCC28221D is available in tube packaging with higher inventory levels (1900 pcs), supporting production scalability compared to the UCC28221DR.

Frequently Asked Questions (FAQ)

Q: Can UCC28221D directly replace UCC28221DR in existing designs? A: Yes. Both parts are electrically and mechanically identical across all specified parameters. Pin configuration, package dimensions (16-SOIC), and functional characteristics are equivalent. No circuit modifications are required.

Q: What is the primary reason for substitution? A: The UCC28221DR is classified as obsolete. The UCC28221D is the active equivalent part, ensuring continued supply chain availability and production support.

Q: Are there any compliance differences between these parts? A: No. Both parts maintain identical RoHS3 compliance status and moisture sensitivity level (MSL 1). Regulatory and environmental certifications are equivalent.

Q: What are the packaging differences? A: The UCC28221DR packaging type is not specified in available data. The UCC28221D is supplied in tube packaging. Both use identical 16-SOIC surface mount package configuration with 0.154" (3.90mm) width.

Q: Are there inventory considerations for part selection? A: The UCC28221D has higher current inventory (1900 pcs) compared to UCC28221DR (910 pcs). For production planning, the UCC28221D is recommended due to superior availability.

Q: Do these parts require different handling or storage procedures? A: No. Both parts carry identical moisture sensitivity level (MSL 1 - Unlimited), requiring equivalent handling and storage protocols.