UCC28050P Equivalent & Substitute Parts

Part Overview

The UCC28050P is a Power Factor Correction (PFC) controller IC manufactured by Texas Instruments, designed for discontinuous (transition mode) operation at 200kHz switching frequency. This device is classified as Last Time Buy, indicating it has reached end-of-life status. The UCC28050P is packaged in 8-PDIP through-hole configuration and is suitable for applications requiring PFC control in the 15.4V to 18V supply voltage range.

Due to its Last Time Buy status, identifying functionally equivalent substitute parts is essential for design continuity and long-term product support. Substitute parts must maintain compatibility across critical electrical parameters including operating mode, supply voltage range, startup current characteristics, and temperature performance.

Substiute Parts

UCC28050P

Texas InstrumentsIn Stock: 4245UCC28050P Datasheet

Current PartRFQ

UCC28056CDBVR

Texas InstrumentsIn Stock: 21228UCC28056CDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC28050P is determined by the following critical parameters:

Operating Mode Compatibility: The substitute part must operate in Discontinuous (Transition) mode to maintain equivalent control characteristics and circuit behavior.

Supply Voltage Range: The substitute must accept the 15.4V to 18V supply voltage range of the original design. Substitute parts with wider voltage ranges (such as 8.5V to 34V) are acceptable as they encompass the original specification.

Startup Current: The substitute startup current of 46 µA is lower than the original 75 µA, which is acceptable and represents improved efficiency characteristics.

Temperature Performance: The substitute operating temperature range of −40°C to +125°C exceeds the original −40°C to +105°C specification, providing extended thermal margin.

Packaging Consideration: The UCC28056CDBVR is available in SOT-23-6 surface-mount packaging, which differs from the through-hole 8-DIP package of the UCC28050P. This represents a package technology transition and requires PCB redesign.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN/HTSUS classifications, ensuring regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The UCC28056CDBVR is the manufacturer-recommended substitute for the UCC28050P. Both devices are manufactured by Texas Instruments and maintain identical regulatory compliance status (ROHS3, REACH unaffected, EAR99 ECCN classification).

The UCC28056CDBVR offers the following advantages:

Active Product Status: The substitute is in active production, ensuring long-term availability and supply chain continuity, whereas the UCC28050P is Last Time Buy.

Extended Operating Temperature Range: The substitute supports −40°C to +125°C operation, providing 20°C additional upper temperature margin compared to the original specification.

Improved Startup Current Efficiency: The 46 µA startup current is 39% lower than the original 75 µA, reducing quiescent power consumption.

Wider Supply Voltage Acceptance: The 8.5V to 34V range provides design flexibility beyond the original 15.4V to 18V specification.

Packaging Transition: The shift from 8-DIP through-hole to SOT-23-6 surface-mount packaging requires PCB redesign but aligns with modern manufacturing practices and reduces board space requirements.

Selection of the UCC28056CDBVR is appropriate for new designs and redesigns of existing products using the UCC28050P.

Frequently Asked Questions (FAQ)

Q: Can the UCC28056CDBVR directly replace the UCC28050P without PCB modification?

A: No. The UCC28056CDBVR uses SOT-23-6 surface-mount packaging, while the UCC28050P uses 8-DIP through-hole packaging. PCB redesign is required to accommodate the different package footprint and pin configuration.

Q: Are the electrical characteristics of both devices equivalent?

A: Both devices operate in Discontinuous (Transition) mode and are manufactured by Texas Instruments. The UCC28056CDBVR accepts the original supply voltage range of 15.4V to 18V within its wider 8.5V to 34V specification. Functional equivalence is maintained for the specified operating conditions.

Q: What is the pin-to-pin compatibility between these devices?

A: The devices are not pin-compatible. The UCC28050P is 8-pin DIP, while the UCC28056CDBVR is 6-pin SOT-23. Pin assignments differ and must be evaluated against the specific application schematic.

Q: Why is the switching frequency not specified for the UCC28056CDBVR?

A: The switching frequency specification is not provided in the available technical parameters for the UCC28056CDBVR. This parameter should be confirmed through the device datasheet before final design implementation.

Q: Is the UCC28056CDBVR suitable for applications currently using the UCC28050P?

A: The UCC28056CDBVR is suitable for applications within the specified electrical operating ranges. However, circuit topology and control loop design may require evaluation to ensure proper PFC operation at the intended switching frequency and load conditions.

Q: What is the inventory status of these parts?

A: The UCC28050P has 4,180 pieces in stock (Last Time Buy status). The UCC28056CDBVR has 21,200 pieces in stock and is actively manufactured, providing superior long-term availability.