UCC28C44D Equivalent & Substitute Parts

Part Overview

The UCC28C44D is an offline PWM controller IC manufactured by Texas Instruments, designed for boost, flyback, and forward converter topologies with positive output configuration. This device operates as a transistor driver for step-up and step-up/step-down DC-DC conversion applications. The UCC28C44D is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical or compatible electrical and mechanical specifications are available from Texas Instruments and onsemi.

Substiute Parts

UCC28C44D

Texas InstrumentsIn Stock: 3869UCC28C44D Datasheet

Current PartRFQ

UCC28C44DR

Texas InstrumentsIn Stock: 25483UCC28C44DR Datasheet

MFR RecommendedRFQ

UC2844BD1R2G

onsemiIn Stock: 65167UC2844BD1R2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC28C44D are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
• Output type: Transistor driver
• Topology support: Boost and/or flyback converter capability
• Output configuration: Positive output
• Duty cycle maximum: 48%
• Mounting type: Surface mount
• Compliance: ROHS3 compliant

Secondary Compatibility Factors:

• Voltage supply range overlap or compatibility with 9V ~ 18V operation
• Switching frequency capability (up to 1MHz or compatible range)
• Operating temperature range coverage
• Control features: Frequency control capability

The UCC28C44DR from Texas Instruments is a direct equivalent, maintaining identical electrical specifications and active product status. The UC2844BD1R2G from onsemi provides functional equivalence with compatible topologies and package, though with different voltage supply range (10V ~ 36V) and switching frequency specification (up to 500kHz).

Parameter Comparison

Engineering Selection Recommendations

UCC28C44DR (Texas Instruments) is the primary recommended substitute for the obsolete UCC28C44D. This part maintains identical electrical specifications, including voltage supply range (9V ~ 18V), switching frequency capability (up to 1MHz), and duty cycle maximum (48%). The UCC28C44DR is in active product status with higher inventory availability (25,400 pcs), ensuring long-term supply continuity. Both parts share the same base product number (UCC28C44) and are fully compatible at the electrical and mechanical level.

UC2844BD1R2G (onsemi) serves as an alternative substitute when supply constraints exist for the UCC28C44DR. This part maintains package compatibility (8-SOIC), identical duty cycle specification (48%), and supports boost and flyback topologies. The UC2844BD1R2G operates within a wider voltage supply range (10V ~ 36V), which accommodates the original 9V ~ 18V specification. The switching frequency specification (up to 500kHz) is lower than the original part; applications requiring switching frequencies above 500kHz should use the UCC28C44DR. The UC2844BD1R2G is in active product status with substantial inventory (65,100 pcs).

Both substitute parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), matching the original part's compliance profile.

Frequently Asked Questions (FAQ)

Q: Can the UCC28C44DR be used as a direct replacement for the UCC28C44D?

A: Yes. The UCC28C44DR is a direct electrical and mechanical equivalent. Both parts share identical voltage supply range (9V ~ 18V), switching frequency capability (up to 1MHz), duty cycle maximum (48%), and 8-SOIC package specification. The primary difference is product status: UCC28C44D is obsolete while UCC28C44DR is active.

Q: What are the key differences between UCC28C44DR and UC2844BD1R2G?

A: Both parts are package-compatible (8-SOIC) and support boost and flyback topologies with 48% maximum duty cycle. The UCC28C44DR maintains the original voltage supply range (9V ~ 18V) and switching frequency capability (up to 1MHz). The UC2844BD1R2G operates at a wider voltage supply range (10V ~ 36V) and supports switching frequencies up to 500kHz. For applications requiring switching frequencies above 500kHz, the UCC28C44DR is required.

Q: Are there any package or pinout differences between these substitutes?

A: No. All three parts use the 8-SOIC package with 0.154" width (3.90mm). Package and pinout are identical, allowing direct PCB-level substitution without layout modifications.

Q: Which substitute should be selected for new designs?

A: The UCC28C44DR is the recommended choice for new designs, as it maintains full electrical compatibility with the original UCC28C44D specification and is in active product status. The UC2844BD1R2G is suitable when supply availability of the UCC28C44DR is constrained, provided the application's switching frequency requirement does not exceed 500kHz.

Q: Are both substitutes ROHS3 compliant?

A: Yes. Both UCC28C44DR and UC2844BD1R2G are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original UCC28C44D compliance profile.