UCC28730DR Equivalent & Substitute Parts

Part Overview

The UCC28730DR is an offline switch flyback converter IC manufactured by Texas Instruments, designed for isolated power management applications. This device operates across a switching frequency range of 32Hz to 83kHz and supports supply voltages from 9V to 35V, making it suitable for offline power supply designs requiring galvanic isolation. The part is currently in active production status with robust inventory availability (119,892 pcs in stock). Alternative equivalent parts may be required due to supply constraints, design revisions, or application-specific qualification requirements such as automotive-grade certifications.

Substiute Parts

UCC28730DR

Texas InstrumentsIn Stock: 119932UCC28730DR Datasheet

Current PartRFQ

UCC28730QDRQ1

Texas InstrumentsIn Stock: 6308UCC28730QDRQ1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UCC28730DR is determined by strict parametric matching across the following critical criteria:

Mandatory Matching Parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Supply (Vcc/Vdd): 9V ~ 35V range
• Voltage - Start Up: 21V threshold
• Frequency - Switching: 32Hz ~ 83kHz operating range
• Fault Protection: Current Limiting and Over Voltage protection
• Operating Temperature: -40°C ~ 125°C (TJ)
• Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Mounting Type: Surface Mount

The UCC28730QDRQ1 qualifies as a parametric equivalent based on identical electrical specifications and mechanical compatibility. The primary distinction is the automotive-grade qualification (AEC-Q100) and associated moisture sensitivity level adjustment, which does not affect core functional substitution in standard industrial applications.

Parameter Comparison

Engineering Selection Recommendations

Both UCC28730DR and UCC28730QDRQ1 are active production parts from Texas Instruments with identical core electrical and mechanical specifications. Selection between these parts depends on application requirements:

UCC28730DR is appropriate for standard industrial offline flyback converter applications where automotive qualification is not required. This variant offers superior moisture handling characteristics (MSL 1) and is suitable for general-purpose power management designs.

UCC28730QDRQ1 is the automotive-grade equivalent, qualified to AEC-Q100 standards. This variant is mandatory for automotive applications, transportation systems, or designs requiring automotive-level reliability and traceability. The MSL 2 rating requires standard moisture control during storage and handling.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across industrial and automotive markets.

Frequently Asked Questions (FAQ)

Q: Can UCC28730QDRQ1 be used as a direct replacement for UCC28730DR in non-automotive applications?

A: Yes. The UCC28730QDRQ1 is electrically and mechanically identical to the UCC28730DR. The automotive qualification (AEC-Q100) and adjusted moisture sensitivity level do not degrade performance in standard industrial applications. However, cost considerations may favor the standard industrial grade where automotive certification is unnecessary.

Q: What are the key differences between these two parts?

A: The primary differences are grade classification (Industrial vs. Automotive), AEC-Q100 qualification status, and moisture sensitivity level (MSL 1 vs. MSL 2). All electrical parameters, switching characteristics, protection features, and package specifications are identical.

Q: Are the package dimensions identical between UCC28730DR and UCC28730QDRQ1?

A: Yes. Both parts use the 8-SOIC (0.154", 3.90mm Width) package with 7 leads. PCB layout and footprint compatibility are guaranteed between these variants.

Q: What does MSL 2 (1 Year) mean for the UCC28730QDRQ1?

A: MSL 2 indicates the part can be stored in standard conditions for up to one year before moisture absorption becomes a concern. Upon opening the original packaging, the part should be used within the specified timeframe or stored in controlled humidity conditions. MSL 1 (Unlimited) for the UCC28730DR allows indefinite storage without moisture-related constraints.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design does not have specific automotive qualification requirements. Both parts share identical electrical specifications, operating ranges, and package footprints, enabling direct substitution at the component level.