UCC28231PW Equivalent & Substitute Parts

Part Overview

The UCC28231PW is a Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up/Step-Down DC-DC Controller IC manufactured by Texas Instruments in 14-TSSOP packaging. This device functions as a transistor driver with four outputs and operates across a supply voltage range of 7V to 17V with switching frequencies between 100kHz and 550kHz. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

UCC28231PW

Texas InstrumentsIn Stock: 1180UCC28231PW Datasheet

Current PartRFQ

LM5045MH/NOPB

Texas InstrumentsIn Stock: 4869LM5045MH/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC28231PW is determined by alignment across the following critical parameters:

Topology Compatibility: The substitute must support Full-Bridge topology as the primary operational mode, ensuring functional equivalence in converter architecture.

Output Configuration: The substitute must provide transistor driver outputs capable of controlling power switching stages in the specified topology.

Supply Voltage Range: The substitute must operate within or encompass the 7V to 17V supply voltage specification of the original device.

Switching Frequency Range: The substitute must support switching frequencies within or overlapping the 100kHz to 550kHz operational band.

Thermal Operating Range: The substitute must maintain functionality across the -55°C to 125°C temperature specification.

Packaging and Mounting: Surface mount packaging in TSSOP or compatible form factor is required for direct board-level substitution.

Compliance Standards: RoHS3 compliance and equivalent regulatory certifications ensure compatibility with current manufacturing and supply chain requirements.

The LM5045MH/NOPB qualifies as a substitute based on shared topology support, surface mount configuration, overlapping frequency capability, and equivalent compliance certifications, despite differences in package pin count and supply voltage range extension.

Parameter Comparison

Engineering Selection Recommendations

The LM5045MH/NOPB is an active product from Texas Instruments with current manufacturing support and inventory availability, addressing the obsolescence status of the UCC28231PW. Both devices maintain ROHS3 compliance and equivalent regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

The LM5045MH/NOPB extends the supply voltage range to 14V–100V, accommodating higher input voltage applications beyond the original 7V–17V specification. The switching frequency capability extends to 2MHz, providing operational flexibility for designs requiring higher frequency operation within the original 100kHz–550kHz band.

The package transition from 14-TSSOP to 28-PowerTSSOP requires PCB layout modification and pin mapping verification. The increased pin count and package size accommodate additional control and protection features integrated into the LM5045 architecture.

Selection of the LM5045MH/NOPB is appropriate for applications where the extended supply voltage range and higher switching frequency capability provide design advantages, and where PCB layout modifications are feasible. The active product status ensures long-term availability and technical support.

Frequently Asked Questions (FAQ)

Q: Can the LM5045MH/NOPB directly replace the UCC28231PW without PCB modifications?

A: No. The LM5045MH/NOPB uses a 28-PowerTSSOP package compared to the 14-TSSOP of the UCC28231PW. Pin count, spacing, and layout differ, requiring PCB redesign and pin mapping verification before implementation.

Q: What is the primary reason for substitution?

A: The UCC28231PW is obsolete. The LM5045MH/NOPB is an active product with current manufacturing support, ensuring long-term availability and supply chain continuity.

Q: Are there supply voltage compatibility concerns?

A: The LM5045MH/NOPB operates at 14V–100V, while the UCC28231PW operates at 7V–17V. Applications using supply voltages below 14V require verification that the LM5045 minimum supply voltage meets system requirements. Applications within the 14V–17V overlap range are directly compatible.

Q: How do the switching frequency ranges compare?

A: The UCC28231PW operates at 100kHz–550kHz. The LM5045MH/NOPB supports up to 2MHz, providing higher frequency capability. Designs operating within the original 100kHz–550kHz band remain compatible.

Q: Are both devices RoHS compliant?

A: Yes. Both the UCC28231PW and LM5045MH/NOPB are ROHS3 compliant with equivalent REACH and ECCN classifications.

Q: What additional control features does the LM5045MH/NOPB provide?

A: The LM5045MH/NOPB includes synchronization (Sync) capability in addition to frequency control and soft start features present in the UCC28231PW.

Q: What is the operating temperature range difference?

A: The UCC28231PW operates at -55°C to 125°C, while the LM5045MH/NOPB operates at -40°C to 125°C. Applications requiring operation below -40°C require alternative solutions.