STR-W6052S Equivalent & Substitute Parts

Part Overview

The STR-W6052S is an offline flyback converter IC manufactured by Sanken Electric USA Inc., designed for isolated power supply applications. This device operates at 60kHz to 74kHz switching frequency with 60W power output capability and integrated current limiting, overload, over-temperature, and over-voltage protection. The product is currently obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The STR-W6052S is part of the STR-W6000S series and is RoHS compliant with unlimited moisture sensitivity rating.

Substiute Parts

STR-W6052S

Sanken Electric USA Inc.In Stock: 3549STR-W6052S Datasheet

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TOP254YN

Power IntegrationsIn Stock: 4304TOP254YN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STR-W6052S is based on the following critical parameters that define functional equivalence:

• Topology: Both main and substitute parts must use flyback converter topology for isolated power supply applications
• Output Isolation: Isolated output requirement must be maintained
• Internal Switch: Integrated switching element required
• Voltage Breakdown Rating: Minimum 650V to ensure safe operation in offline applications
• Power Output: Rated power must meet or exceed 60W
• Switching Frequency: Operating range must overlap or be compatible with 60kHz to 74kHz range
• Fault Protection: Current limiting, over-temperature, and over-voltage protection required
• Package Compatibility: Through-hole mounting in TO-220 form factor
• Compliance: RoHS compliance required

The TOP254YN from Power Integrations meets these substitution criteria as an active product with equivalent functional specifications and compatible packaging.

Parameter Comparison

Engineering Selection Recommendations

The TOP254YN is a suitable substitute for the STR-W6052S based on the following factors:

• Product Status: The TOP254YN is an active product from Power Integrations, ensuring long-term availability and supply chain continuity, whereas the STR-W6052S is obsolete
• Compliance: Both parts are RoHS compliant and meet the same regulatory requirements
• Functional Equivalence: Both devices implement isolated flyback topology with integrated switching, current limiting, over-temperature, and over-voltage protection
• Power Rating: The TOP254YN provides 62W output, exceeding the 60W requirement of the STR-W6052S
• Voltage Ratings: The TOP254YN features a higher 700V breakdown voltage compared to 650V, providing additional safety margin in offline applications
• Operating Temperature Range: The TOP254YN supports -40°C to 150°C, extending the operating envelope beyond the STR-W6052S range of -20°C to 115°C
• Package Consideration: Both use through-hole TO-220 form factor; however, the TOP254YN is a 7-pin package versus the 6-pin STR-W6052S, requiring PCB layout verification

Frequently Asked Questions (FAQ)

Q: Can the TOP254YN directly replace the STR-W6052S without PCB modifications?

A: The TOP254YN uses a TO-220-7 package with 6 functional leads, while the STR-W6052S uses TO-220-6. Pin-to-pin compatibility must be verified against the respective datasheets. PCB layout modifications may be required to accommodate the different pin configuration.

Q: What are the key differences in switching frequency between these parts?

A: The STR-W6052S operates at 60kHz to 74kHz, while the TOP254YN operates at 66kHz or 132kHz. The 66kHz mode overlaps with the STR-W6052S range. Transformer design and feedback network adjustments may be necessary to ensure proper operation at the selected frequency.

Q: Are there any protection feature differences?

A: Both parts provide current limiting, over-temperature, and over-voltage protection. The STR-W6052S additionally specifies overload protection. The TOP254YN datasheet should be consulted to confirm equivalent overload handling capability.

Q: Why is the duty cycle different between these parts?

A: The STR-W6052S operates at 71% duty cycle while the TOP254YN operates at 78%. Duty cycle is determined by the control architecture and transformer design. This difference requires transformer and feedback network recalculation for equivalent power delivery.

Q: Is the TOP254YN suitable for the same input voltage range?

A: The STR-W6052S specifies 8.1V to 32V supply voltage. The TOP254YN supply voltage specification is not provided in the available data. Datasheet review is required to confirm input voltage compatibility for your specific application.

Q: What is the impact of the higher operating temperature range of the TOP254YN?

A: The TOP254YN supports -40°C to 150°C junction temperature, compared to -20°C to 115°C ambient for the STR-W6052S. This provides greater thermal margin and suitability for extended temperature applications, though thermal design must still be validated for your specific circuit.