TOP245GN-TL Equivalent & Substitute Parts

Part Overview

The TOP245GN-TL is an offline flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications with 30W output capacity. This device integrates a high-voltage switch with comprehensive fault protection including current limiting, over-temperature, and over-voltage protection. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. For applications requiring continued support or new design implementations, equivalent substitute parts within the TOPSwitch®-GX family provide compatible alternatives with varying power ratings.

Substiute Parts

TOP245GN-TL

Power IntegrationsIn Stock: 6224TOP245GN-TL Datasheet

Current PartRFQ

TOP242GN-TL

Power IntegrationsIn Stock: 23383TOP242GN-TL Datasheet

Parametric EquivalentRFQ

TOP243GN-TL

Power IntegrationsIn Stock: 18359TOP243GN-TL Datasheet

Parametric EquivalentRFQ

TOP244GN-TL

Power IntegrationsIn Stock: 25093TOP244GN-TL Datasheet

Parametric EquivalentRFQ

TOP246GN-TL

Power IntegrationsIn Stock: 3807TOP246GN-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the TOPSwitch®-GX family is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 700V maximum rating
• Frequency - Switching: 66kHz ~ 132kHz operating range
• Duty Cycle: 66.5%
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Package / Case: 8-SMD (7 Leads), Gull Wing
• Supplier Device Package: SMD-8B
• Mounting Type: Surface Mount

Variable Parameter (Substitution Basis):

• Power (Watts): Ranges from 15W to 34W across the substitute family

All substitute parts maintain identical electrical characteristics, protection features, and thermal specifications. Substitution is valid when the application power requirement does not exceed the substitute part's rated power output. The primary distinction among TOP242GN-TL, TOP243GN-TL, TOP244GN-TL, TOP245GN-TL, and TOP246GN-TL is the maximum power delivery capability.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts within the TOPSwitch®-GX family maintain full compliance with RoHS and REACH regulations. The selection of an appropriate substitute is determined solely by the power requirement of the target application.

Selection Criteria:

For applications requiring power output up to 15W, the TOP242GN-TL provides the lowest-power alternative within the family.

For applications requiring power output between 15W and 25W, the TOP243GN-TL is suitable.

For applications requiring power output between 25W and 28W, the TOP244GN-TL is suitable.

For applications requiring power output at 30W, the TOP245GN-TL (original specification) or TOP246GN-TL (34W rated) are suitable.

For applications requiring power output up to 34W, the TOP246GN-TL provides the highest-power alternative within the family.

All parts share identical electrical characteristics, protection mechanisms, thermal operating ranges, and package specifications. The substitution decision is based on whether the application's power demand falls within or below the substitute part's rated power capacity. Parts rated above the application requirement are electrically compatible and functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can TOP242GN-TL replace TOP245GN-TL in a 30W application?

A: No. The TOP242GN-TL is rated for 15W maximum output. Using an undersized part in a 30W application will result in thermal stress and potential device failure. The substitute part's power rating must equal or exceed the application requirement.

Q: Can TOP246GN-TL replace TOP245GN-TL in a 30W application?

A: Yes. The TOP246GN-TL is rated for 34W output, which exceeds the 30W requirement. All electrical characteristics, protection features, and thermal specifications are identical. The device will operate within specification.

Q: Are the package dimensions identical across all substitute parts?

A: Yes. All parts use the 8-SMD (7 Leads), Gull Wing package with SMD-8B supplier device package designation. PCB footprints and reflow profiles are identical.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates the TOP245GN-TL has reached end-of-life. For new product development, substitute parts from the same TOPSwitch®-GX family are recommended. All substitutes carry the same product status classification.

Q: Do all parts support the same operating temperature range?

A: Yes. All substitute parts operate from -40°C to 150°C junction temperature (TJ). Thermal management design requirements are equivalent across the family.

Q: Is there a difference in fault protection between substitute parts?

A: No. All parts include identical fault protection: Current Limiting, Over Temperature, and Over Voltage protection. Control features (Frequency Control) are also identical.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous reels for automated assembly lines. Cut Tape packaging is supplied in individual tape segments. Both formats contain the same device; the difference is in supply format and handling. Electrical and mechanical specifications are identical.

Q: Can I use TOP243GN-TL in place of TOP244GN-TL?

A: No. The TOP243GN-TL is rated for 25W, while TOP244GN-TL is rated for 28W. If the application requires 28W output, the TOP243GN-TL will be undersized. Conversely, TOP244GN-TL can replace TOP243GN-TL in applications requiring up to 25W.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All parts in the substitute list are RoHS Compliant and REACH Unaffected, matching the compliance status of the TOP245GN-TL.