TOP249R-TL Equivalent & Substitute Parts

Part Overview

The TOP249R-TL is an offline flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications. This component operates at 66kHz to 132kHz switching frequency with 79W power capability and integrates internal current limiting, over-temperature, and over-voltage protection. The TOP249R-TL is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production continuity.

Substiute Parts

TOP249R-TL

Power IntegrationsIn Stock: 26216TOP249R-TL Datasheet

Current PartRFQ

TOP250R-TL

Power IntegrationsIn Stock: 2271TOP250R-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP249R-TL is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Voltage breakdown rating: 700V
• Switching frequency range: 66kHz ~ 132kHz
• Topology: Flyback converter
• Output isolation: Isolated
• Internal switch integration: Yes
• Fault protection features: Current Limiting, Over Temperature, Over Voltage
• Control mechanism: Frequency Control
• Operating temperature range: -40°C ~ 150°C (TJ)

Mechanical Compatibility Requirements:

• Package type: TO-263-7 / D2PAK (6 Leads + Tab)
• Mounting type: Surface Mount

Series Requirement:

• TOPSwitch®-GX series membership

The TOP250R-TL qualifies as a parametric equivalent based on matching all electrical and mechanical specifications. Power output variance (79W vs. 82W) remains within acceptable substitution tolerance for this component category.

Parameter Comparison

Engineering Selection Recommendations

TOP250R-TL as Primary Substitute:

The TOP250R-TL is the direct parametric equivalent for TOP249R-TL replacement. Both components share identical electrical specifications across all critical parameters: 700V breakdown voltage, 66kHz–132kHz switching frequency, isolated flyback topology, and equivalent fault protection architecture. The 3W power output increase (79W to 82W) represents a performance enhancement suitable for direct substitution in existing designs.

Product Status Considerations:

The TOP249R-TL is classified as obsolete, while the TOP250R-TL carries "Not For New Designs" status. For production continuity of existing products, the TOP250R-TL provides functional equivalence. For new design initiatives, evaluation of current-generation TOPSwitch®-GX alternatives from Power Integrations is recommended to ensure long-term component availability and compliance with evolving regulatory requirements.

Compliance Notes:

Both components are RoHS non-compliant and carry identical MSL ratings (4, 72 Hours). The TOP250R-TL is REACH Affected, whereas the TOP249R-TL is REACH Unaffected. Design teams must verify REACH compliance requirements for their specific application and supply chain.

Frequently Asked Questions (FAQ)

Q: Can TOP250R-TL directly replace TOP249R-TL in existing PCB designs?

A: Yes. Both components use identical TO-263-7 / D2PAK packaging with matching pinout and lead configuration. No PCB layout modifications are required for mechanical or electrical compatibility.

Q: What is the significance of the 3W power difference (79W vs. 82W)?

A: The TOP250R-TL provides higher power capability, making it suitable for applications requiring the TOP249R-TL's 79W specification. The increased rating does not create incompatibility; it represents a performance upgrade within the same component family.

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

A: No. Both components operate at identical switching frequency ranges (66kHz–132kHz), duty cycle (66.8%), breakdown voltage (700V), and protection thresholds. Circuit designs require no modification for substitution.

Q: What packaging options are available for TOP250R-TL?

A: The TOP250R-TL is supplied in Cut Tape (CT) packaging. The TOP249R-TL inventory information does not specify packaging format. Verify packaging requirements for your procurement and assembly processes.

Q: Why is TOP249R-TL classified as obsolete?

A: Component obsolescence reflects Power Integrations' product lifecycle management. The TOP250R-TL's "Not For New Designs" status indicates it remains available for production support but is not recommended for new development. Current-generation alternatives should be evaluated for new projects.

Q: Are there compliance differences between these parts?

A: Both components are RoHS non-compliant with identical MSL ratings. The TOP250R-TL is REACH Affected while TOP249R-TL is REACH Unaffected. Verify REACH compliance requirements for your application and geographic market.

Q: What is the inventory status for substitution planning?

A: TOP249R-TL inventory: 26,141 pieces. TOP250R-TL inventory: 2,238 pieces. For production continuity, verify substitute availability with your component supplier before discontinuing TOP249R-TL procurement.