UCC2813PW-2 Equivalent & Substitute Parts

Part Overview

The UCC2813PW-2 is an offline switch mode power supply controller manufactured by Texas Instruments, designed for boost, flyback, and forward converter topologies operating at 1MHz switching frequency. This device integrates internal switching functionality and operates across a supply voltage range of 8.3V to 12V with a 99% duty cycle capability. The main part is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Substiute Parts

UCC2813PW-2

Texas InstrumentsIn Stock: 4381UCC2813PW-2 Datasheet

Current PartRFQ

UCC2813DTR-2

Texas InstrumentsIn Stock: 5113UCC2813DTR-2 Datasheet

MFR RecommendedRFQ

UCC2813PW-4

Texas InstrumentsIn Stock: 2291UCC2813PW-4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC2813PW-2 are identified based on the following critical parameters that determine functional compatibility:

Core Electrical Parameters (Must Match):

• Topology: Boost, Flyback, Forward
• Voltage - Supply (Vcc/Vdd): 8.3V ~ 12V
• Frequency - Switching: 1MHz
• Duty Cycle: 99%
• Operating Temperature: -55°C ~ 150°C (TJ)
• Control Features: Frequency Control

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Pin count and functional pin assignment compatibility

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Two substitute categories are identified:

1. MFR Recommended Substitute (UCC2813DTR-2): Manufacturer-recommended alternative with identical electrical specifications but different packaging (8-SOIC vs. 8-TSSOP). Packaging change requires PCB layout modification.

2. Parametric Equivalent (UCC2813PW-4): Identical package and electrical specifications with different product status (Active vs. Last Time Buy), providing direct drop-in replacement capability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Drop-In Replacement (No PCB Modification): Select UCC2813PW-4. This part maintains identical package geometry (8-TSSOP), electrical specifications, and mounting requirements as the UCC2813PW-2. The primary distinction is Active product status, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant and REACH unaffected.

For Alternative Packaging Requirement: Select UCC2813DTR-2 when package footprint modification is acceptable. This manufacturer-recommended substitute provides identical electrical performance and Active product status. The 8-SOIC package (0.154" width) differs from the 8-TSSOP package (0.173" width), requiring PCB layout redesign. This option offers higher inventory availability (5026 pcs) and improved moisture sensitivity rating (MSL 1 vs. MSL 2).

Product Status Consideration: The UCC2813PW-2 is designated Last Time Buy, indicating discontinued production. Both substitute parts carry Active status, providing extended procurement windows and supply reliability for new designs or production continuity.

Frequently Asked Questions (FAQ)

Q: Can UCC2813PW-4 replace UCC2813PW-2 without PCB modification? A: Yes. Both parts use identical 8-TSSOP packaging, electrical specifications, and pin configurations. No PCB layout changes are required for direct substitution.

Q: What is the primary difference between UCC2813DTR-2 and UCC2813PW-2? A: The UCC2813DTR-2 uses 8-SOIC packaging instead of 8-TSSOP, requiring PCB footprint redesign. Electrical performance and operating parameters remain identical. The DTR-2 variant offers improved moisture sensitivity (MSL 1 vs. MSL 2) and higher current inventory.

Q: Why is UCC2813PW-2 marked as Last Time Buy? A: Last Time Buy status indicates Texas Instruments has discontinued production of this specific part number variant. Existing inventory remains available, but no future production is planned. Substitution to Active variants (UCC2813PW-4 or UCC2813DTR-2) is recommended for long-term design continuity.

Q: Are all three parts ROHS3 compliant? A: Yes. UCC2813PW-2, UCC2813DTR-2, and UCC2813PW-4 are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging formats are available for these parts? A: UCC2813PW-2 and UCC2813PW-4 are supplied in Tube packaging. UCC2813DTR-2 is available in Cut Tape (CT) and Digi-Reel® formats, offering flexibility for different procurement and assembly workflows.

Q: Can I use UCC2813DTR-2 in a design originally specified for UCC2813PW-2? A: Electrical substitution is valid. However, the different package footprint (8-SOIC vs. 8-TSSOP) requires PCB layout modification. Pin functionality and electrical performance are equivalent across all three parts.