UCC28634DR Equivalent & Substitute Parts

Part Overview

The UCC28634DR is an offline switch flyback converter IC manufactured by Texas Instruments, designed for isolated power management applications. This device operates across a 200Hz to 120kHz switching frequency range with 30W power handling capability and integrated fault protection including current limiting, overload, over-temperature, and over-voltage protection. The UCC28634DR is classified as Last Time Buy, indicating end-of-life status. Identifying parametric equivalents and active substitute parts is essential for design continuity, supply chain resilience, and long-term product support.

Substiute Parts

UCC28634DR

Texas InstrumentsIn Stock: 4017UCC28634DR Datasheet

Current PartRFQ

UCC28630DR

Texas InstrumentsIn Stock: 11772UCC28630DR Datasheet

Parametric EquivalentRFQ

UCC28631DR

Texas InstrumentsIn Stock: 3854UCC28631DR Datasheet

Parametric EquivalentRFQ

UCC28632DR

Texas InstrumentsIn Stock: 2582UCC28632DR Datasheet

Parametric EquivalentRFQ

UCC28633DR

Texas InstrumentsIn Stock: 3412UCC28633DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC28634DR is based on strict parametric equivalence across the following critical criteria:

Topology & Functional Requirements: All substitute parts maintain identical flyback converter topology with isolated output configuration, ensuring functional compatibility in offline switch applications.

Electrical Specifications: Substitute parts share identical voltage supply range (8V ~ 20V), startup voltage (14.75V), switching frequency range (200Hz ~ 120kHz), power rating (30W), and duty cycle (70%). These parameters define the core operational envelope and must remain constant for direct substitution.

Fault Protection: All substitute parts include identical fault protection mechanisms: current limiting, overload, over-temperature, and over-voltage protection.

Thermal & Environmental: Operating temperature range (-40°C ~ 125°C) and moisture sensitivity level (MSL 2, 1 Year) are identical across all parts.

Package & Mounting: All parts use 7-SOIC package with 8-SOIC (0.154", 3.90mm Width) form factor and surface mount technology, ensuring PCB-level compatibility without layout modifications.

Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

UCC28630DR is the primary substitute for UCC28634DR. This part maintains full parametric equivalence and carries Active product status, ensuring long-term availability and manufacturing support. Current inventory of 11,730 units provides supply security for production requirements.

UCC28631DR and UCC28633DR are secondary substitutes with identical electrical and thermal specifications. Both maintain Active status with inventory levels of 3,818 and 3,325 units respectively, supporting alternative sourcing strategies.

UCC28632DR is a tertiary substitute offering complete parametric compatibility. This part carries Active status with 2,560 units in inventory. Packaging information is not specified in available data; verification of packaging type is required before selection.

All substitute parts comply with ROHS3 and maintain REACH unaffected status, meeting regulatory compliance requirements for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can UCC28630DR, UCC28631DR, UCC28632DR, or UCC28633DR be used as direct replacements for UCC28634DR without PCB modifications?

A: Yes. All substitute parts share identical 7-SOIC package configuration with 8-SOIC (0.154", 3.90mm Width) form factor and surface mount technology. Pin-to-pin compatibility and footprint equivalence eliminate the need for PCB layout changes.

Q: Are the electrical operating parameters identical between UCC28634DR and its substitutes?

A: Yes. All substitute parts maintain identical voltage supply range (8V ~ 20V), startup voltage (14.75V), switching frequency range (200Hz ~ 120kHz), power rating (30W), duty cycle (70%), and fault protection mechanisms. Functional behavior in flyback converter topologies remains unchanged.

Q: Why is UCC28634DR classified as Last Time Buy?

A: Last Time Buy status indicates end-of-life designation by the manufacturer. This classification necessitates transition to active substitute parts for ongoing production and future designs. UCC28630DR, UCC28631DR, UCC28632DR, and UCC28633DR all maintain Active status.

Q: What is the difference between these substitute parts if all parameters are identical?

A: The provided parametric data shows complete electrical and thermal equivalence across all parts. Differences, if any, exist at the silicon level or in internal design revisions not reflected in the specified parameters. For applications requiring specific internal characteristics, Texas Instruments technical documentation should be consulted.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. UCC28630DR, UCC28631DR, UCC28632DR, and UCC28633DR all maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for new product designs and manufacturing.

Q: Which substitute part should be selected for new designs?

A: UCC28630DR is the recommended primary choice due to highest inventory availability (11,730 units) and confirmed Active product status. UCC28631DR and UCC28633DR serve as secondary alternatives with adequate inventory levels. UCC28632DR may be selected if packaging verification confirms suitability for your application.