TOP246R-TL Equivalent & Substitute Parts

Part Overview

The TOP246R-TL is an offline switch integrated circuit manufactured by Power Integrations, designed for flyback converter topologies in isolated power management applications. This device operates at switching frequencies between 66 kHz and 132 kHz with a maximum power rating of 64 W and a 700 V breakdown voltage rating. The TOP246R-TL is classified as "Not For New Designs," indicating that this product line has reached end-of-life status. For applications currently using TOP246R-TL, identifying equivalent substitute parts from the TOPSwitch®-GX series is necessary to ensure design continuity and component availability.

Key Parameters

Parameter	Value
Manufacturer	Power Integrations
Series	TOPSwitch®-GX
Category	Power Management (PMIC)
Topology	Flyback
Output Isolation	Isolated
Voltage - Breakdown	700 V
Frequency - Switching	66 kHz ~ 132 kHz
Power (Watts)	64 W
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
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution of the TOP246R-TL within the TOPSwitch®-GX family is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Matching Parameters:

Topology: Flyback
Output Isolation: Isolated
Voltage - Breakdown: 700 V
Frequency - Switching: 66 kHz ~ 132 kHz
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 (Determines Power Rating):

Power (Watts): Varies by model

The substitute parts TOP243R-TL, TOP244R-TL, TOP245R-TL, and TOP247R-TL all share identical electrical characteristics and package specifications with the TOP246R-TL. The primary distinction among these parts is the maximum power rating, which ranges from 45 W to 70 W. All substitute parts maintain the same switching frequency range, breakdown voltage, protection features, and thermal operating range.

Parameter Comparison

Parameter	TOP246R-TL	TOP243R-TL	TOP244R-TL	TOP245R-TL	TOP247R-TL
Manufacturer	Power Integrations	Power Integrations	Power Integrations	Power Integrations	Power Integrations
Series	TOPSwitch®-GX	TOPSwitch®-GX	TOPSwitch®-GX	TOPSwitch®-GX	TOPSwitch®-GX
Topology	Flyback	Flyback	Flyback	Flyback	Flyback
Output Isolation	Isolated	Isolated	Isolated	Isolated	Isolated
Voltage - Breakdown	700 V	700 V	700 V	700 V	700 V
Frequency - Switching	66 kHz ~ 132 kHz	66 kHz ~ 132 kHz	66 kHz ~ 132 kHz	66 kHz ~ 132 kHz	66 kHz ~ 132 kHz
Power (Watts)	64 W	45 W	50 W	57 W	70 W
Duty Cycle	66.5%	66.5%	66.5%	66.5%	66.5%
Fault Protection	Current Limiting, Over Temperature, Over Voltage	Current Limiting, Over Temperature, Over Voltage	Current Limiting, Over Temperature, Over Voltage	Current Limiting, Over Temperature, Over Voltage	Current Limiting, Over Temperature, Over Voltage
Control Features	Frequency Control	Frequency Control	Frequency Control	Frequency Control	Frequency Control
Operating Temperature	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)
Package / Case	TO-263-7	TO-263-7	TO-263-7	TO-263-7	TO-263-7
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)	4 (72 Hours)	4 (72 Hours)	4 (72 Hours)	4 (72 Hours)

Engineering Selection Recommendations

All substitute parts listed—TOP243R-TL, TOP244R-TL, TOP245R-TL, and TOP247R-TL—are functionally equivalent to the TOP246R-TL within the TOPSwitch®-GX series and share identical electrical specifications, package configurations, and compliance certifications. The selection among these substitutes depends solely on the power rating requirement of the target application.

Power Rating Selection Guidance:

TOP243R-TL (45 W): For applications requiring the lowest power rating within the series.
TOP244R-TL (50 W): For applications with moderate power requirements below the TOP246R-TL baseline.
TOP245R-TL (57 W): For applications with power requirements slightly below the TOP246R-TL rating.
TOP246R-TL (64 W): Original reference part with mid-range power capability.
TOP247R-TL (70 W): For applications requiring the highest power rating within the series.

All parts maintain identical RoHS non-compliance status, Moisture Sensitivity Level 4 (72 Hours), and operating temperature range of -40°C to 150°C (TJ). Pin configuration and PCB layout compatibility are preserved across all substitute parts due to identical TO-263-7 package specifications.

Frequently Asked Questions (FAQ)

Q: Can TOP243R-TL, TOP244R-TL, TOP245R-TL, or TOP247R-TL be used as direct replacements for TOP246R-TL?

A: Direct replacement is possible only when the application power requirement does not exceed the substitute part's rated power. All substitute parts share identical electrical characteristics, switching frequency range, breakdown voltage, protection features, and TO-263-7 package configuration. Pin-to-pin compatibility is maintained across all models.

Q: What is the primary difference between TOP246R-TL and its substitute parts?

A: The primary difference is the maximum power rating. TOP246R-TL is rated at 64 W, while substitutes range from 45 W (TOP243R-TL) to 70 W (TOP247R-TL). All other electrical and mechanical parameters remain identical.

Q: Are there packaging differences between TOP246R-TL and the substitute parts?

A: The TOP246R-TL is supplied in Cut Tape (CT) packaging, while TOP243R-TL is supplied in Tape & Reel (TR) packaging. TOP244R-TL, TOP245R-TL, and TOP247R-TL are supplied in Cut Tape (CT) packaging. All parts use the same TO-263-7 package case. Packaging format does not affect electrical compatibility or pin configuration.

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

A: This status indicates that the TOP246R-TL and all substitute parts in the TOPSwitch®-GX series have reached end-of-life. These parts remain available from existing inventory but are not recommended for new design initiation. Existing designs using these parts may continue to source from available stock.

Q: Are all substitute parts RoHS compliant?

A: No. All substitute parts, including TOP243R-TL, TOP244R-TL, TOP245R-TL, and TOP247R-TL, are RoHS non-compliant, matching the compliance status of the TOP246R-TL.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All parts, including TOP246R-TL and all substitutes, have an MSL rating of 4 with a 72-hour floor life requirement. Proper moisture control during storage and handling is required.

Q: Can I use TOP247R-TL (70 W) in an application originally designed for TOP246R-TL (64 W)?

A: Yes. The TOP247R-TL has a higher power rating and maintains all other electrical specifications identical to TOP246R-TL. The higher power rating does not create incompatibility; however, thermal management design should be verified to ensure adequate heat dissipation for the specific application.

Q: Can I use TOP243R-TL (45 W) in an application originally designed for TOP246R-TL (64 W)?

A: No. The TOP243R-TL has a lower power rating than the TOP246R-TL. Using a lower-rated part in a higher-power application will result in insufficient power delivery and potential device failure.

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