TOP242R-TL Equivalent & Substitute Parts

Part Overview

The TOP242R-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-GX series. This device integrates a 700V breakdown voltage power switch with frequency control and comprehensive fault protection for isolated flyback topology applications. The part operates at 66kHz to 132kHz switching frequency with 22W power capability and is housed in a TO-263-7 surface mount package.

The TOP242R-TL carries a "Not For New Designs" product status, indicating that Power Integrations has superseded this device in their product roadmap. This status necessitates identification of equivalent substitute parts for ongoing production support, maintenance applications, and legacy system repairs where the original specification must be maintained.

Substiute Parts

TOP242R-TL

Power IntegrationsIn Stock: 6179TOP242R-TL Datasheet

Current PartRFQ

TOP243R-TL

Power IntegrationsIn Stock: 1972TOP243R-TL Datasheet

Parametric EquivalentRFQ

TOP244R-TL

Power IntegrationsIn Stock: 5329TOP244R-TL Datasheet

Parametric EquivalentRFQ

TOP245R-TL

Power IntegrationsIn Stock: 16214TOP245R-TL Datasheet

Parametric EquivalentRFQ

TOP246R-TL

Power IntegrationsIn Stock: 1842TOP246R-TL Datasheet

Parametric EquivalentRFQ

TOP247R-TL

Power IntegrationsIn Stock: 1730TOP247R-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP242R-TL is determined by strict adherence to the following parameters:

Core Compatibility Parameters:

• Manufacturer: Power Integrations (same manufacturer ensures design consistency)
• Series: TOPSwitch®-GX (same integrated control architecture)
• Topology: Flyback (identical converter topology)
• Output Isolation: Isolated (same isolation requirement)
• Voltage - Breakdown: 700V (identical voltage rating)
• Frequency - Switching: 66kHz ~ 132kHz (identical frequency range)
• Duty Cycle: 66.5% (identical duty cycle specification)
• Fault Protection: Current Limiting, Over Temperature, Over Voltage (identical protection features)
• Control Features: Frequency Control (identical control method)
• Operating Temperature: -40°C ~ 150°C (TJ) (identical thermal range)
• Package / Case: TO-263-7, D2PAK (6 Leads + Tab) (identical pinout and footprint)
• Mounting Type: Surface Mount (identical mounting requirement)

Variable Parameter:

• Power (Watts): The substitute parts in the TOP242R-TL family range from 22W to 70W. Higher power-rated devices can substitute for lower power applications within the same topology and control architecture, provided the application circuit design accommodates the device characteristics.

All substitute parts listed maintain identical electrical and mechanical specifications except for power rating, which increases across the family. This allows upward substitution based on application power requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: All parts in this substitution family, including the TOP242R-TL and its equivalents, carry "Not For New Designs" status from Power Integrations. This designation applies uniformly across the TOPSwitch®-GX series and indicates that these devices remain available for production support and legacy applications but are not recommended for new product development initiatives.

Compliance and Certification: All substitute parts maintain identical compliance profiles:

• RoHS Status: RoHS non-compliant (consistent across all variants)
• REACH Status: REACH Unaffected (consistent across all variants)
• ECCN: EAR99 (consistent across all variants)
• HTSUS: 8542.39.0001 (consistent across all variants)

Power Rating Selection: The TOP242R-TL operates at 22W. Substitute selection should be based on application power requirements:

• TOP243R-TL (45W): Suitable for applications requiring up to 45W
• TOP244R-TL (50W): Suitable for applications requiring up to 50W
• TOP245R-TL (57W): Suitable for applications requiring up to 57W
• TOP246R-TL (64W): Suitable for applications requiring up to 64W
• TOP247R-TL (70W): Suitable for applications requiring up to 70W

Packaging Availability: TOP242R-TL is supplied in Tape & Reel (TR) packaging. Substitute parts TOP243R-TL through TOP247R-TL are available in Cut Tape (CT) packaging. Packaging format selection depends on production volume and assembly line requirements.

Moisture Sensitivity: TOP242R-TL carries MSL 1 (Unlimited). Substitute parts TOP243R-TL through TOP247R-TL carry MSL 4 (72 Hours), requiring controlled storage and handling procedures during manufacturing.

Frequently Asked Questions (FAQ)

Q: Can TOP245R-TL substitute for TOP242R-TL in an existing design?

A: Yes. TOP245R-TL is a parametric equivalent with identical electrical specifications (700V breakdown, 66kHz-132kHz switching frequency, 66.5% duty cycle, identical fault protection, and frequency control). The primary difference is power rating (57W versus 22W). The higher power rating does not prevent substitution in a 22W application. Identical pinout and TO-263-7 package ensure mechanical compatibility. No circuit redesign is required.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies the same components on cut segments of carrier tape, suitable for lower volumes or manual assembly. Both formats use identical TO-263-7 package geometry and pinout. Selection depends on production volume and assembly equipment capability.

Q: Why do substitute parts have higher power ratings than the original TOP242R-TL?

A: The TOPSwitch®-GX series uses a scalable architecture where the same control topology and protection features are implemented across multiple power levels. Higher power variants use identical switching frequency, duty cycle, and control methods but are rated for greater power dissipation. This allows a single design family to serve applications from 22W to 70W.

Q: Are all substitute parts identical in pinout?

A: Yes. All parts in this substitution group use the TO-263-7 package with identical pin configuration (D2PAK with 6 Leads + Tab). Direct PCB footprint compatibility is guaranteed across all variants.

Q: What does "Not For New Designs" status mean for substitution?

A: This status indicates that Power Integrations has discontinued active development and marketing of these devices. However, they remain available for production support of existing designs and legacy applications. All substitute parts carry identical "Not For New Designs" status, confirming they are part of the same legacy product family.

Q: Does the higher MSL rating of substitute parts affect substitution?

A: TOP242R-TL carries MSL 1 (Unlimited moisture sensitivity level), while TOP243R-TL through TOP247R-TL carry MSL 4 (72 Hours). MSL 4 requires that components be stored in controlled humidity environments and used within 72 hours of package opening. This is a manufacturing process consideration, not an electrical compatibility issue. Substitution is valid provided manufacturing procedures accommodate MSL 4 handling requirements.

Q: Can lower power-rated parts substitute for higher power applications?

A: No. Substitution follows upward compatibility only. A 22W-rated device cannot substitute for a 70W application. However, higher power-rated devices can substitute for lower power applications within the same topology and control architecture.