IR1150STR PFC Controller - Equivalent & Substitute Parts

Part Overview

The IR1150STR is a Power Factor Correction (PFC) controller IC designed for continuous conduction mode (CCM) operation at 200kHz switching frequency in an 8-SOIC surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The IR1150STR operates within a 15V to 20V supply voltage range and is suitable for applications requiring active power factor correction in industrial and consumer power supplies.

Substiute Parts

IR1150STR

Infineon TechnologiesIn Stock: 1948IR1150STR Datasheet

Current PartRFQ

UCC28019DR

Texas InstrumentsIn Stock: 5415UCC28019DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR1150STR is determined by the following critical parameters:

Functional Compatibility Criteria:

• Operating mode: Continuous Conduction (CCM)
• Package type: 8-SOIC surface mount (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Application category: Power Factor Correction (PFC) controller

Electrical Operating Range Compatibility:

• Supply voltage range must encompass or overlap with 15V ~ 20V
• Switching frequency operation in the PFC controller range
• Startup current characteristics suitable for PFC applications

The UCC28019DR from Texas Instruments qualifies as a manufacturer-recommended substitute based on identical package geometry, matching CCM mode operation, compatible supply voltage range (10V ~ 21V encompasses the IR1150STR range), and equivalent functional classification as a PFC controller IC.

Parameter Comparison

Engineering Selection Recommendations

The UCC28019DR is the manufacturer-recommended substitute for the obsolete IR1150STR. Selection of this alternative provides the following advantages:

Product Status: The UCC28019DR maintains active product status with ongoing manufacturer support, ensuring long-term availability and technical documentation access compared to the obsolete IR1150STR.

Compliance & Certifications: The UCC28019DR achieves ROHS3 compliance, addressing regulatory requirements for new designs and manufacturing environments where RoHS compliance is mandated. The IR1150STR's non-compliant status restricts its use in regulated markets.

Reliability & Storage: The UCC28019DR features MSL 1 (Unlimited) moisture sensitivity rating versus MSL 2 (1 Year) for the IR1150STR, providing superior shelf life and reduced handling constraints during storage and assembly operations.

Operating Temperature Range: The UCC28019DR supports -40°C to 125°C operation, exceeding the IR1150STR's 0°C to 70°C range and accommodating broader environmental and industrial applications.

Package Compatibility: Both devices utilize identical 8-SOIC (0.154", 3.90mm Width) surface mount packaging, enabling direct PCB layout compatibility without redesign.

Supply Voltage Range: The UCC28019DR's 10V to 21V supply range encompasses the IR1150STR's 15V to 20V operating window, ensuring functional compatibility in existing power supply designs.

Frequently Asked Questions (FAQ)

Q: Can the UCC28019DR directly replace the IR1150STR without PCB modifications?

A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm Width) surface mount packaging with matching pin configurations for PFC controller applications. PCB layout remains unchanged.

Q: What is the primary difference between the IR1150STR and UCC28019DR?

A: The switching frequency differs: IR1150STR operates at 200kHz while UCC28019DR operates at 65kHz. Both maintain CCM mode operation and compatible supply voltage ranges. The UCC28019DR offers active product status, RoHS3 compliance, and extended operating temperature range.

Q: Is the UCC28019DR suitable for designs currently using the IR1150STR?

A: Yes. The UCC28019DR meets all functional requirements for PFC controller applications within the specified supply voltage range (10V ~ 21V encompasses 15V ~ 20V). The lower switching frequency may require verification of output filter component values in specific circuit topologies.

Q: What are the compliance advantages of switching to UCC28019DR?

A: The UCC28019DR achieves ROHS3 compliance, eliminating restrictions associated with the IR1150STR's non-compliant status. This enables use in regulated manufacturing environments and markets with RoHS mandates.

Q: How does the operating temperature range affect component selection?

A: The UCC28019DR's -40°C to 125°C range supports industrial and extended-temperature applications beyond the IR1150STR's 0°C to 70°C capability. Applications requiring operation below 0°C or above 70°C require the UCC28019DR.

Q: What is the significance of MSL rating differences?

A: The UCC28019DR's MSL 1 (Unlimited) rating provides indefinite shelf life without moisture baking requirements, compared to the IR1150STR's MSL 2 (1 Year) rating which requires controlled storage and periodic baking. This reduces handling complexity and storage costs.

Q: Are there any electrical parameter differences that affect circuit design?

A: Startup current differs: IR1150STR requires 175 µA while UCC28019DR requires 100 µA. Both values are within typical PFC controller specifications. The 65kHz versus 200kHz switching frequency may require output filter component recalculation depending on circuit topology and performance requirements.