TOP260LN Equivalent & Substitute Parts Reference

Part Overview

The TOP260LN is an offline flyback converter IC from Power Integrations' TOPSwitch®-HX series, designed for isolated power supply applications with 190 W output capability. This component operates at 66 kHz or 132 kHz switching frequency with integrated current limiting, over-temperature, and over-voltage protection. The TOP260LN is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. Substitute parts within the TOPSwitch®-HX family maintain core electrical and mechanical compatibility while offering active product status and continued manufacturer support.

Key Parameters

Parameter	Value
Manufacturer	Power Integrations
Series	TOPSwitch®-HX
Topology	Flyback
Output Isolation	Isolated
Voltage - Breakdown	700V
Frequency - Switching	66 kHz, 132 kHz
Duty Cycle	78%
Fault Protection	Current Limiting, Over Temperature, Over Voltage
Operating Temperature Range	-40°C to 150°C (TJ)
Package / Case	7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Mounting Type	Through Hole
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution within the TOPSwitch®-HX family is determined by the following critical parameters:

Fixed Compatibility Parameters:

Topology: Flyback (all substitutes)
Output Isolation: Isolated (all substitutes)
Voltage - Breakdown: 700V (all substitutes)
Switching Frequency: 66 kHz, 132 kHz (all substitutes)
Duty Cycle: 78% (all substitutes)
Fault Protection: Current Limiting, Over Temperature, Over Voltage (all substitutes)
Operating Temperature Range: -40°C to 150°C (TJ) (all substitutes)
Package / Case: 7-SSIP, 6 Leads, Exposed Pad, Formed Leads (all substitutes)
Mounting Type: Through Hole (all substitutes)

Variable Parameter - Power Rating: The power output rating differs across substitute parts, ranging from 21 W to 119 W. Selection of a substitute must ensure the chosen part's power rating meets or exceeds the application requirement.

Product Status Consideration: The TOP260LN is obsolete. All listed substitute parts maintain active product status, ensuring ongoing availability and manufacturer support.

Parameter Comparison

Part Number	Manufacturer	Power (Watts)	Voltage - Breakdown	Topology	Switching Frequency	Package	Product Status	Inventory (Pcs)
TOP260LN	Power Integrations	190 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7F	Obsolete	4400
TOP252EG	Power Integrations	21 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	696
TOP252EN	Power Integrations	21 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	5100
TOP253EG	Power Integrations	43 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	677
TOP253EN	Power Integrations	25 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	1177
TOP254EG	Power Integrations	62 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	16400
TOP254EN	Power Integrations	62 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	3834
TOP255EG	Power Integrations	81 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	8000
TOP255EN	Power Integrations	81 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	10037
TOP256EG	Power Integrations	119 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	1266
TOP256EN	Power Integrations	119 W	700V	Flyback	66 kHz, 132 kHz	7-SSIP eSIP-7C	Active	27159

Engineering Selection Recommendations

Product Status: The TOP260LN is classified as obsolete. All substitute parts listed maintain active product status with Power Integrations, ensuring continued manufacturing, technical support, and long-term availability.

Compliance and Certifications: All substitute parts maintain identical compliance profiles to the TOP260LN:

RoHS Compliant
REACH Unaffected
ECCN: EAR99
HTSUS: 8542.39.0001
Moisture Sensitivity Level: 1 (Unlimited)

Power Rating Selection: The TOP260LN operates at 190 W. No substitute part in the provided list matches this exact power rating. For applications requiring 190 W output, the highest-rated substitute available is TOP256EN or TOP256EG at 119 W. Applications with lower power requirements should select the substitute part whose power rating meets or exceeds the specific application demand.

Packaging Consideration: The TOP260LN uses eSIP-7F packaging. Substitute parts use eSIP-7C packaging. Both maintain 7-SSIP, 6 Leads, Exposed Pad, Formed Leads configuration with Through Hole mounting. PCB layout and thermal management design may require adjustment to accommodate packaging differences.

Frequently Asked Questions (FAQ)

Q: Can TOP256EN or TOP256EG directly replace TOP260LN in a 190 W application?

A: No. TOP256EN and TOP256EG are rated at 119 W maximum output, which is below the 190 W requirement of the TOP260LN. Direct substitution would result in insufficient power delivery. Application redesign or alternative component sourcing is required for 190 W applications.

Q: Are all substitute parts electrically compatible with TOP260LN?

A: All substitute parts share identical electrical parameters: 700V breakdown voltage, 66/132 kHz switching frequency, 78% duty cycle, isolated topology, and identical fault protection features. Electrical compatibility is confirmed for these parameters. Power rating differences require application-level assessment.

Q: What is the difference between eSIP-7F and eSIP-7C packaging?

A: Both are 7-lead surface-mount packages with exposed pad and formed leads. The primary difference is the package outline and thermal characteristics. PCB footprint and thermal design may require modification when transitioning from eSIP-7F to eSIP-7C.

Q: Which substitute part offers the best inventory availability?

A: TOP256EN provides the highest inventory level at 27,159 pieces. TOP254EG offers 16,400 pieces. Both parts maintain active product status.

Q: Are there power rating options between 119 W and 190 W?

A: The provided substitute parts do not include options between 119 W (TOP256 series) and 190 W (TOP260LN). For applications requiring power output between these levels, alternative component families or custom design solutions may be necessary.

Q: Do all substitute parts maintain the same operating temperature range?

A: Yes. All substitute parts operate across -40°C to 150°C (TJ), identical to the TOP260LN.

Q: What is the significance of the "EG" and "EN" suffixes in part numbers?

A: The suffixes indicate packaging variants within the same base product. Both EG and EN variants maintain identical electrical specifications and are functionally equivalent. Selection between EG and EN should be based on packaging preference and inventory availability.

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