UC2852D PFC Controller - Equivalent & Substitute Parts

Part Overview

The UC2852D is a Power Factor Correction (PFC) controller IC manufactured by Texas Instruments, designed for continuous conduction mode (CCM) operation at 200kHz switching frequency. This device is classified as Last Time Buy, indicating end-of-life status. The UC2852D operates across a 13V to 30V supply voltage range and is packaged in 8-SOIC surface mount configuration.

Due to Last Time Buy status, identifying functionally compatible substitute parts is essential for design continuity and long-term supply chain planning. The substitute identified maintains core PFC control functionality while offering extended availability and improved operating characteristics.

Substiute Parts

UC2852D

Texas InstrumentsIn Stock: 7965UC2852D Datasheet

Current PartRFQ

UCC28056CDBVR

Texas InstrumentsIn Stock: 21228UCC28056CDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UC2852D with the UCC28056CDBVR is based on the following criteria:

Functional Compatibility:

• Both devices are Texas Instruments PFC controller ICs designed for power factor correction applications
• Both operate as surface mount components with ROHS3 compliance
• Both support the required supply voltage range with UCC28056CDBVR offering extended range (8.5V ~ 34V vs. 13V ~ 30V)

Key Substitution Parameters:

• Manufacturer: Texas Instruments (same)
• Category: Power Management (PMIC) (same)
• RoHS Compliance: ROHS3 (same)
• Mounting Type: Surface Mount (same)
• Operating Temperature Range: UCC28056CDBVR extends to -40°C ~ 125°C (improved)

Operational Differences:

• Mode: UCC28056CDBVR operates in Discontinuous/Transition mode versus UC2852D's Continuous Conduction mode
• Switching Frequency: UC2852D specifies 200kHz; UCC28056CDBVR frequency not specified in datasheet parameters
• Package: Different form factors (8-SOIC vs. SOT-23-6) requiring PCB layout modification
• Startup Current: UCC28056CDBVR draws 46 µA versus UC2852D's 400 µA

Parameter Comparison

Engineering Selection Recommendations

UC2852D Selection Criteria:

• Existing designs with established CCM topology and 200kHz switching frequency
• Applications requiring the specified 13V ~ 30V supply voltage range
• Designs already validated with 8-SOIC package footprint
• Last Time Buy status requires immediate procurement for long-term inventory

UCC28056CDBVR Selection Criteria:

• New designs requiring extended product lifecycle and Active status availability
• Applications benefiting from lower startup current (46 µA vs. 400 µA)
• Systems requiring extended operating temperature range (-40°C ~ 125°C)
• Designs tolerating Discontinuous/Transition mode operation
• Applications with extended moisture sensitivity requirements (MSL 1 vs. MSL 2)
• Designs capable of accommodating SOT-23-6 package footprint

Both devices maintain ROHS3 compliance and Texas Instruments manufacturing standards. The UCC28056CDBVR offers superior long-term availability and compliance characteristics due to Active product status.

Frequently Asked Questions (FAQ)

Q: Can UCC28056CDBVR directly replace UC2852D in existing designs?

A: Direct replacement requires evaluation of three factors: (1) PCB layout modification for SOT-23-6 versus 8-SOIC package, (2) circuit topology compatibility with Discontinuous/Transition mode versus Continuous Conduction mode, and (3) application performance validation under the different startup current specifications.

Q: What is the primary reason for substitution?

A: UC2852D carries Last Time Buy status, indicating manufacturer end-of-life. UCC28056CDBVR maintains Active status with extended availability.

Q: Are both devices ROHS3 compliant?

A: Yes, both UC2852D and UCC28056CDBVR are ROHS3 compliant and REACH unaffected.

Q: How do the operating temperature ranges differ?

A: UC2852D operates -40°C ~ 85°C. UCC28056CDBVR extends to -40°C ~ 125°C, providing broader thermal operating envelope.

Q: What package modifications are required?

A: UC2852D uses 8-SOIC (0.154", 3.90mm width). UCC28056CDBVR uses SOT-23-6. PCB layout redesign is necessary; these packages are not pin-compatible.

Q: How do startup current specifications compare?

A: UC2852D requires 400 µA startup current. UCC28056CDBVR requires 46 µA, representing approximately 88.5% reduction in inrush current.

Q: What is the moisture sensitivity difference?

A: UC2852D is MSL 2 (1 Year shelf life). UCC28056CDBVR is MSL 1 (Unlimited shelf life), indicating superior moisture resistance and storage stability.