FSQ0765RSUDTU Equivalent & Substitute Parts

Part Overview

The FSQ0765RSUDTU is an offline switching controller IC manufactured by onsemi, designed for flyback converter topologies in power management applications. This device integrates an internal power switch with comprehensive fault protection including current limiting, overload, overvoltage, and short circuit protection. The part operates in the 48kHz to 67kHz switching frequency range and delivers up to 90W of power output.

The FSQ0765RSUDTU carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this controller.

Substiute Parts

FSQ0765RSUDTU

onsemiIn Stock: 1394FSQ0765RSUDTU Datasheet

Current PartRFQ

FSQ0565RQWDTU

Fairchild SemiconductorIn Stock: 1559FSQ0565RQWDTU Datasheet

Parametric EquivalentRFQ

FSQ0765RQWDTU

onsemiIn Stock: 4395FSQ0765RQWDTU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSQ0765RSUDTU are identified based on strict parametric equivalence across the following critical criteria:

Topology & Isolation: Flyback converter topology with isolated output configuration Voltage Ratings: 650V breakdown voltage, 8V to 20V supply voltage range Switching Frequency: 48kHz to 67kHz operating range Fault Protection: Current limiting, overload, overvoltage, short circuit, and overtemperature protection Package & Mounting: TO-220-6 full pack with formed leads, through-hole mounting Control Architecture: Synchronous control features Operating Temperature Range: -25°C to 85°C

The identified substitute parts maintain these core electrical and mechanical parameters, ensuring functional compatibility within applications designed for the FSQ0765RSUDTU.

Parameter Comparison

Engineering Selection Recommendations

FSQ0565RQWDTU (Fairchild Semiconductor): This part maintains electrical and mechanical compatibility with the FSQ0765RSUDTU across all critical parameters. The primary distinction is reduced power output (80W versus 90W). This substitute carries Active product status, ensuring ongoing availability and supply chain support. The part is available in Bulk packaging. Selection of this substitute is appropriate for applications where the 80W power rating meets design requirements.

FSQ0765RQWDTU (onsemi): This part provides direct parametric equivalence to the FSQ0765RSUDTU, maintaining the 90W power rating and all electrical specifications. Both parts share identical topology, voltage ratings, switching frequency, and fault protection architecture. The FSQ0765RQWDTU carries Obsolete product status, matching the main part. This substitute is available in Tube packaging and offers the highest degree of functional compatibility.

Selection between substitutes should prioritize product status and supply availability. The FSQ0565RQWDTU offers the advantage of Active status for long-term supply assurance, while the FSQ0765RQWDTU provides exact power rating equivalence.

Frequently Asked Questions (FAQ)

Q: Can FSQ0565RQWDTU replace FSQ0765RSUDTU in all applications? A: The FSQ0565RQWDTU is electrically and mechanically compatible with the FSQ0765RSUDTU across all critical parameters. The 80W power rating of the FSQ0565RQWDTU versus the 90W rating of the FSQ0765RSUDTU is the primary distinction. Substitution is valid for applications where the lower power output meets design specifications.

Q: What is the significance of the different lead forming styles (U-Forming, W-Forming, L-Forming)? A: The lead forming style (U-Forming, W-Forming, L-Forming) refers to the physical configuration of the TO-220-6 package leads. All three variants maintain the same electrical characteristics and pin configuration. Lead forming style selection is determined by PCB layout and mechanical assembly requirements.

Q: Are there differences in packaging between the substitute parts? A: The FSQ0765RSUDTU is supplied in Bulk packaging, FSQ0565RQWDTU in Bulk packaging, and FSQ0765RQWDTU in Tube packaging. Packaging format does not affect electrical performance or functional compatibility. Selection should align with procurement and inventory management requirements.

Q: Why is the FSQ0765RSUDTU marked as Obsolete? A: Obsolete product status indicates that the manufacturer has discontinued active production and support. The FSQ0565RQWDTU, carrying Active status, provides a path for continued supply assurance in new designs or production continuity.

Q: Are all substitute parts ROHS3 compliant? A: The FSQ0765RSUDTU and FSQ0765RQWDTU are both ROHS3 compliant. Compliance status for FSQ0565RQWDTU is not specified in the provided data.