UCC2813PW-4 Equivalent & Substitute Parts

Part Overview

The UCC2813PW-4 is an offline switching controller IC manufactured by Texas Instruments, designed for boost, flyback, and forward converter topologies operating at 1MHz. This non-isolated power management device integrates an internal switch and operates across a supply voltage range of 8.3V to 12V with a 99% duty cycle capability. The part is currently in active production status with 2220 units available in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design flexibility is required across manufacturing locations. The UCC2813PW-2 represents a parametrically equivalent alternative with identical electrical and mechanical specifications but differs in product lifecycle status.

Substiute Parts

UCC2813PW-4

Texas InstrumentsIn Stock: 2291UCC2813PW-4 Datasheet

Current PartRFQ

UCC2813PW-2

Texas InstrumentsIn Stock: 4381UCC2813PW-2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UCC2813PW-4 is determined by strict parameter matching across the following critical criteria:

Electrical Parameters: Supply voltage range (8.3V ~ 12V), startup voltage (12.5V), switching frequency (1MHz), duty cycle (99%), and topology support (Boost, Flyback, Forward) must be identical.

Mechanical Parameters: Package type (8-TSSOP), case dimensions (0.173", 4.40mm Width), and mounting type (Surface Mount) must match exactly to ensure PCB compatibility without redesign.

Compliance & Environmental: RoHS3 compliance, MSL rating (2, 1 Year), operating temperature range (-55°C ~ 150°C), and internal switch configuration must remain constant.

The UCC2813PW-2 meets all these criteria and qualifies as a parametric equivalent. Both parts share the same base product number (UCC2813) and are manufactured by Texas Instruments with identical functional specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: UCC2813PW-4 is the recommended choice for new designs and ongoing production. This part maintains active product status with confirmed availability of 2220 units in stock, ensuring supply chain continuity and long-term support from Texas Instruments.

Alternative Selection: UCC2813PW-2 qualifies as a direct substitute based on complete electrical and mechanical parameter equivalence. However, this part carries Last Time Buy status, indicating limited future availability. Selection of UCC2813PW-2 is appropriate only when UCC2813PW-4 supply is constrained and immediate inventory requirements exceed available stock of the primary part. Current inventory of 4288 units provides temporary supply relief.

Compliance Assurance: Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental compatibility across manufacturing and field deployment scenarios.

Frequently Asked Questions (FAQ)

Q: Can UCC2813PW-2 be used as a direct replacement for UCC2813PW-4 on existing PCBs?

A: Yes. Both parts are pin-compatible with identical 8-TSSOP package dimensions and electrical specifications. No PCB redesign or layout modification is required for substitution.

Q: What is the significance of the product status difference between these parts?

A: UCC2813PW-4 is in active production with ongoing manufacturer support. UCC2813PW-2 is designated Last Time Buy, meaning Texas Instruments will discontinue production after existing inventory is depleted. For long-term supply security, UCC2813PW-4 is the preferred choice.

Q: Are there any electrical performance differences between UCC2813PW-4 and UCC2813PW-2?

A: No. Both parts operate identically across all specified parameters: supply voltage range, switching frequency, duty cycle, topology support, and operating temperature range are identical.

Q: What does the "-4" and "-2" suffix indicate in these part numbers?

A: The suffix designates the product lifecycle or manufacturing batch code assigned by Texas Instruments. Both parts share the same base product number (UCC2813) and functional specifications.

Q: Can these parts be used interchangeably in boost, flyback, and forward converter applications?

A: Yes. Both UCC2813PW-4 and UCC2813PW-2 support all three topology types with identical performance characteristics and control features.

Q: What is the MSL rating and why does it matter?

A: Both parts carry MSL 2 with a 1-year floor life rating. This indicates moderate moisture sensitivity. Components must be stored in controlled humidity environments and used within 12 months of package opening to maintain reliability.