TOP245R-TL Equivalent & Substitute Parts

Part Overview

The TOP245R-TL is an offline flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications. This device integrates a high-voltage power switch with comprehensive protection features including current limiting, over-temperature, and over-voltage protection. The part operates at a switching frequency of 66kHz to 132kHz with a maximum power rating of 57W and is housed in a TO-263-7 surface mount package.

The TOP245R-TL carries a "Not For New Designs" product status, indicating that Power Integrations no longer recommends this device for new circuit development. This status necessitates identifying functionally equivalent substitute parts from the same TOPSwitch®-GX series that maintain electrical and mechanical compatibility while supporting ongoing production and maintenance requirements.

Substiute Parts

TOP245R-TL

Power IntegrationsIn Stock: 16214TOP245R-TL Datasheet

Current PartRFQ

TOP243R-TL

Power IntegrationsIn Stock: 1972TOP243R-TL Datasheet

Parametric EquivalentRFQ

TOP244R-TL

Power IntegrationsIn Stock: 5329TOP244R-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 TOP245R-TL is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Matching Parameters:

• Manufacturer: Power Integrations
• Series: TOPSwitch®-GX
• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 700V
• 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-263-7, D2PAK (6 Leads + Tab)
• Mounting Type: Surface Mount

Variable Parameter (Allows Substitution):

• Power (Watts): Rated power output differs across the substitute series

All substitute parts in this grouping maintain identical electrical characteristics, protection mechanisms, thermal operating range, and physical package specifications. The primary differentiation among parts is the maximum power rating, which ranges from 45W to 70W across the TOPSwitch®-GX family.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: All parts in this substitution group, including the TOP245R-TL and its equivalents (TOP243R-TL, TOP244R-TL, TOP246R-TL, TOP247R-TL), carry "Not For New Designs" status from Power Integrations. This designation applies uniformly across the entire TOPSwitch®-GX family presented here.

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

• RoHS Status: RoHS non-compliant
• REACH Status: REACH Unaffected
• ECCN: EAR99
• HTSUS: 8542.39.0001
• Moisture Sensitivity Level: 4 (72 Hours)

Power Rating Selection: When selecting a substitute, the power rating must be evaluated against the application's actual power requirements. The TOP245R-TL (57W) can be substituted with parts rated at 45W (TOP243R-TL), 50W (TOP244R-TL), 64W (TOP246R-TL), or 70W (TOP247R-TL). Selection should be based on the specific power delivery requirements of the target application.

Packaging Availability: The TOP243R-TL is supplied in Tape & Reel (TR) format, while TOP245R-TL, TOP244R-TL, TOP246R-TL, and TOP247R-TL are supplied in Cut Tape (CT) format. Packaging selection depends on production volume and assembly line requirements.

Frequently Asked Questions (FAQ)

Q: Can TOP245R-TL be directly replaced with TOP244R-TL?

A: Yes. Both devices share identical electrical specifications including 700V breakdown voltage, 66kHz to 132kHz switching frequency, 66.5% duty cycle, and identical protection features. The primary difference is power rating: TOP244R-TL is rated at 50W versus TOP245R-TL at 57W. Both use the TO-263-7 package with identical pinout and thermal characteristics. Substitution is valid when the application power requirement does not exceed 50W.

Q: What is the difference between TOP245R-TL and TOP246R-TL?

A: Both parts are electrically identical in all parameters except power rating. TOP246R-TL is rated at 64W compared to TOP245R-TL at 57W. Both operate at identical switching frequencies, breakdown voltage, and protection thresholds. The TO-263-7 package and pinout are identical. TOP246R-TL can substitute TOP245R-TL in applications requiring higher power capacity.

Q: Why is TOP243R-TL supplied in Tape & Reel while others are Cut Tape?

A: Packaging format (Tape & Reel versus Cut Tape) is a supply chain and manufacturing consideration independent of electrical or mechanical compatibility. Both formats contain identical components in the same TO-263-7 package. Selection depends on production volume and assembly equipment compatibility, not on functional performance.

Q: Are all these parts pin-compatible?

A: Yes. All substitute parts use the TO-263-7 package configuration with D2PAK (6 Leads + Tab) pinout. Pin assignments and thermal tab placement are identical across TOP243R-TL, TOP244R-TL, TOP245R-TL, TOP246R-TL, and TOP247R-TL. Direct PCB substitution is supported without layout modifications.

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

A: This status indicates Power Integrations no longer recommends these devices for new circuit development. However, all parts in this group carry identical status. For existing designs or production support, any part within this substitution group maintains equivalent functional and compliance characteristics.

Q: Can TOP247R-TL (70W) replace TOP245R-TL (57W)?

A: Yes. TOP247R-TL is electrically and mechanically compatible with TOP245R-TL. The higher power rating (70W versus 57W) does not create incompatibility; it provides additional capacity. Substitution is valid for any application currently using TOP245R-TL.

Q: Are there thermal performance differences between these parts?

A: All parts operate within the identical temperature range of -40°C to 150°C (TJ) and share the same TO-263-7 package with thermal tab. Thermal performance characteristics are equivalent across the substitution group.