TOP244Y Equivalent & Substitute Parts

Part Overview

The TOP244Y is an offline flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications. This component integrates a high-voltage switch with control circuitry in a TO-220-7 package, delivering 65 W output power with integrated fault protection.

The TOP244Y is classified as Obsolete. Locating equivalent or substitute components is necessary for ongoing production support, maintenance applications, and design continuity where this part number is specified in existing systems.

Substiute Parts

TOP244Y

Power IntegrationsIn Stock: 1434TOP244Y Datasheet

Current PartRFQ

TOP244YN

Power IntegrationsIn Stock: 3712TOP244YN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP244Y is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 700V
• Power (Watts): 65 W
• Frequency - Switching: 66kHz ~ 132kHz
• Duty Cycle: 66.5%
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 150°C (TJ)
• Package / Case: TO-220-7 Formed Leads, 6 Leads
• Mounting Type: Through Hole

The TOP244YN is identified as a direct substitute. This part maintains identical electrical specifications and mechanical packaging while differing in product status classification and RoHS compliance status. The TOP244YN is packaged in Tube format versus the original part's unspecified packaging.

Parameter Comparison

Engineering Selection Recommendations

For Existing Production Support: The TOP244YN serves as the direct electrical and mechanical equivalent to the TOP244Y. Both parts share identical functional specifications across all critical parameters: topology, isolation, voltage rating, power capacity, switching frequency, duty cycle, protection features, and thermal operating range. The TO-220-7 package pinout and through-hole mounting are identical.

Compliance Considerations: The TOP244Y carries RoHS non-compliant status, while the TOP244YN is RoHS Compliant. Selection between these parts depends on the regulatory requirements of the end application and target market. Both parts maintain REACH Unaffected and EAR99 ECCN classifications.

Product Status Impact: The TOP244Y is classified as Obsolete, indicating discontinued manufacturing and limited availability. The TOP244YN is classified as Not For New Designs, indicating restricted use for new product development but continued support for existing applications. For ongoing production of established systems, the TOP244YN provides continuity with improved compliance posture.

Packaging and Inventory: The TOP244YN is available in Tube packaging with 3675 pieces in stock, compared to 1418 pieces of the TOP244Y. Packaging format selection should align with assembly process requirements and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can TOP244YN be used as a direct replacement for TOP244Y in existing designs?

A: Yes. The TOP244YN is electrically and mechanically equivalent to the TOP244Y. All functional parameters—topology, isolation, voltage rating, power output, switching frequency, duty cycle, fault protection, and thermal range—are identical. The TO-220-7 package and through-hole mounting are unchanged. Substitution is valid for existing applications.

Q: What is the difference between TOP244Y and TOP244YN?

A: The primary differences are product status classification and RoHS compliance. The TOP244Y is Obsolete and RoHS non-compliant. The TOP244YN is Not For New Designs and RoHS Compliant. Both parts are functionally identical in electrical and mechanical specifications. Packaging format differs: TOP244YN is supplied in Tube format.

Q: Why is the TOP244Y classified as Obsolete?

A: Obsolete classification indicates that the manufacturer has discontinued production and support for this part number. The TOP244YN, classified as Not For New Designs, represents the successor designation for this product line, offering continued availability with updated compliance status.

Q: Are there other substitute parts available beyond TOP244YN?

A: The TOP244YN documentation references additional part numbers in the TOPSwitch®-GX series: TOP245YN, TOP246YN, TOP247YN, TOP243YN, and TOP242YN. However, these parts are not confirmed as direct substitutes for the TOP244Y based on the provided specifications. Verification of electrical and mechanical compatibility with these alternative part numbers requires detailed comparison against their individual datasheets.

Q: What is the significance of the 700V breakdown voltage rating?

A: The 700V breakdown voltage specifies the maximum voltage the internal switch can withstand. This rating determines the maximum input voltage the converter can handle and is a critical parameter for offline AC-DC applications. Any substitute part must maintain this 700V specification to ensure safe operation in the intended circuit topology.

Q: Does the 65 W power rating apply to all operating conditions?

A: The 65 W specification represents the rated power output capacity. Actual power delivery depends on input voltage, load conditions, and thermal management. The operating temperature range of -40°C to 150°C (junction temperature) defines the thermal envelope within which this power rating is maintained.

Q: Is the Tube packaging format compatible with automated assembly equipment?

A: Tube packaging is standard for through-hole components and is compatible with conventional pick-and-place and wave soldering processes. Verify that your assembly equipment supports tube-fed component handling. The TO-220-7 package itself is unchanged regardless of packaging format.

Q: What does "Frequency Control" as a control feature mean?

A: Frequency Control indicates that the switching frequency can be adjusted or modulated as part of the converter's control mechanism. This feature enables dynamic regulation of output voltage and current by varying the switching frequency within the 66kHz to 132kHz range, rather than relying solely on duty cycle modulation.