TOP248R-TL Equivalent & Substitute Parts

Part Overview

The TOP248R-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-GX series. This device integrates a 700V power MOSFET with control circuitry for isolated flyback topology applications, operating at switching frequencies between 66kHz and 132kHz with a maximum power rating of 75W.

The TOP248R-TL carries a "Not For New Designs" product status, indicating that Power Integrations has discontinued active development and support for this component. This status necessitates identification of equivalent substitute parts for ongoing production requirements, maintenance applications, and design continuity where legacy systems require component replacement.

Substiute Parts

TOP248R-TL

Power IntegrationsIn Stock: 25159TOP248R-TL Datasheet

Current PartRFQ

TOP250R-TL

Power IntegrationsIn Stock: 2271TOP250R-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP248R-TL is determined by strict alignment across the following critical parameters:

Topology & Isolation: Both the main part and substitute must operate in isolated flyback topology with identical output isolation characteristics.

Voltage Rating: The 700V breakdown voltage specification is a fundamental electrical requirement that cannot be compromised. Substitute parts must maintain this exact rating.

Switching Frequency Range: The 66kHz to 132kHz operating window defines the control loop behavior and transformer design compatibility. Substitutes must operate within this identical frequency band.

Package & Pinout: The TO-263-7 D2PAK package with 6 leads plus tab establishes mechanical and electrical interface requirements. Pin-for-pin compatibility is mandatory.

Operating Temperature Range: The -40°C to 150°C junction temperature specification defines thermal performance boundaries that must be matched.

Protection Features: Current limiting, over-temperature, and over-voltage protection functions must be present in substitute parts.

Series Compatibility: Both parts belong to the TOPSwitch®-GX series, ensuring architectural and functional alignment.

The TOP250R-TL meets all these criteria and is identified as a parametric equivalent within the same product family.

Parameter Comparison

Engineering Selection Recommendations

Substitution Basis: The TOP250R-TL is a direct parametric equivalent to the TOP248R-TL. Both components share identical electrical specifications across all critical parameters: 700V breakdown voltage, 66kHz to 132kHz switching frequency, isolated flyback topology, TO-263-7 package, and identical protection and control features.

Power Rating Consideration: The TOP250R-TL offers a higher power rating of 82W compared to the TOP248R-TL at 75W. This increased power capability does not create incompatibility; rather, it provides additional thermal and power handling margin within the same package and electrical interface.

Product Status Alignment: Both parts carry "Not For New Designs" status from Power Integrations. This shared status indicates that neither component is recommended for new design initiatives. For legacy system support and replacement applications, both parts are functionally equivalent.

Compliance & Certification: Both parts are RoHS non-compliant and carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The TOP250R-TL is REACH Affected, while the TOP248R-TL is REACH Unaffected. This difference requires evaluation within the context of end-application regulatory requirements and supply chain compliance obligations.

Packaging Format: The TOP248R-TL is supplied in Tape & Reel (TR) format with 25,100 pieces in stock. The TOP250R-TL is supplied in Cut Tape (CT) format with 2,238 pieces in stock. Packaging format selection depends on production volume requirements and assembly line equipment compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TOP250R-TL directly replace the TOP248R-TL in existing designs?

A: Yes. The TOP250R-TL is a parametric equivalent with identical electrical specifications, package pinout, and functional characteristics. Pin-for-pin substitution is supported without circuit modification.

Q: What is the significance of the power rating difference (75W vs. 82W)?

A: The TOP250R-TL's higher power rating reflects improved thermal performance within the same TO-263-7 package. This does not affect compatibility; it provides additional operational margin. Applications designed for 75W operation remain fully compatible with the 82W-rated substitute.

Q: Does the packaging format difference (Tape & Reel vs. Cut Tape) affect electrical performance?

A: No. Packaging format affects only supply chain logistics and assembly line handling. Electrical and functional performance is identical. Format selection depends on production volume and assembly equipment requirements.

Q: Are there any compliance differences between these parts?

A: Both parts share identical RoHS, ECCN, and HTSUS classifications. The TOP250R-TL is REACH Affected while the TOP248R-TL is REACH Unaffected. Applications subject to REACH regulations must evaluate this difference within their specific compliance framework.

Q: Why do both parts carry "Not For New Designs" status?

A: This status indicates that Power Integrations has concluded active development and support for these components within the TOPSwitch®-GX series. Both parts remain available for legacy system support and replacement applications. New design initiatives should evaluate current-generation alternatives from Power Integrations.

Q: Is the identical duty cycle (66.8%) significant for substitution?

A: Yes. The duty cycle specification defines the control loop behavior and transformer design parameters. Identical duty cycle values confirm that the TOP250R-TL operates under identical control conditions, ensuring functional equivalence in existing circuit designs.

Q: What is the MSL rating significance for these components?

A: Both parts carry MSL 4 rating with a 72-hour moisture sensitivity window. This specification defines storage and handling requirements prior to reflow soldering. Identical MSL ratings confirm equivalent moisture sensitivity and handling procedures.