TOP267VGAU Equivalent & Substitute Parts Reference

Part Overview

The TOP267VGAU is an offline switch flyback converter IC from Power Integrations' TOPSwitch®-JX series, designed for isolated power supply applications. This component operates at 66kHz or 132kHz switching frequency with 44W power output capability and integrated fault protection including current limiting, overload, over-temperature, over-voltage, and short-circuit protection.

The TOP267VGAU carries an obsolete product status. Identifying equivalent and substitute parts from the active TOPSwitch®-JX product line ensures design continuity and supply chain reliability for applications requiring offline flyback topology converters.

Key Parameters

Parameter	Value
Manufacturer	Power Integrations
Series	TOPSwitch®-JX
Topology	Flyback
Output Isolation	Isolated
Voltage - Breakdown	725V
Frequency - Switching	66kHz, 132kHz
Duty Cycle	78%
Power (Watts)	44W
Fault Protection	Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
Control Features	Frequency Control
Operating Temperature	-40°C ~ 150°C (TJ)
Package / Case	12-SDIP (0.412", 10.46mm), 11 Leads, Exposed Pad
Supplier Device Package	eDIP-12
Mounting Type	Through Hole
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TOP267VGAU is determined by strict adherence to the following parameters:

Fixed Substitution Criteria:

Manufacturer: Power Integrations
Series: TOPSwitch®-JX
Topology: Flyback
Output Isolation: Isolated
Voltage - Breakdown: 725V
Frequency - Switching: 66kHz, 132kHz
Duty Cycle: 78%
Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
Control Features: Frequency Control
Operating Temperature: -40°C ~ 150°C (TJ)
Package / Case: 12-SDIP (0.412", 10.46mm), 11 Leads, Exposed Pad
Supplier Device Package: eDIP-12
Mounting Type: Through Hole
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameter (Determines Substitution Type):

Power (Watts): Ranges from 34W to 59W across the TOPSwitch®-JX family

Substitute parts are grouped into two categories:

Direct Equivalent: TOP267VG maintains identical 44W power rating with active product status and RoHS compliance.
Parametric Equivalents: TOP264VG, TOP265VG, TOP266VG, TOP268VG, TOP269VG, and TOP270VG share all fixed parameters but differ in power output ratings. These parts are selected based on application power requirements within the 34W to 59W range.

Parameter Comparison

Part Number	Manufacturer	Product Status	Power (W)	Voltage - Breakdown (V)	Frequency - Switching (kHz)	Package	Operating Temperature (°C)	RoHS Status
TOP267VGAU	Power Integrations	Obsolete	44	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	Not Specified
TOP267VG	Power Integrations	Active	44	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP264VG	Power Integrations	Active	34	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP265VG	Power Integrations	Active	36	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP266VG	Power Integrations	Active	39	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP268VG	Power Integrations	Active	48	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP269VG	Power Integrations	Active	51	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP270VG	Power Integrations	Active	55	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant
TOP271VG	Power Integrations	Active	59	725	66, 132	12-SDIP eDIP-12	-40 ~ 150	RoHS Compliant

Engineering Selection Recommendations

For Direct Replacement: TOP267VG is the primary substitute for TOP267VGAU. Both parts maintain identical 44W power output and all core electrical and mechanical parameters. TOP267VG carries active product status and RoHS compliance certification, providing superior supply chain availability and regulatory alignment compared to the obsolete TOP267VGAU.

For Power-Scaled Applications: When application requirements differ from the original 44W specification, parametric equivalents within the TOPSwitch®-JX family provide compatible alternatives:

Lower Power Requirements (34W–39W): TOP264VG (34W), TOP265VG (36W), or TOP266VG (39W)
Higher Power Requirements (48W–59W): TOP268VG (48W), TOP269VG (51W), TOP270VG (55W), or TOP271VG (59W)

All substitute parts maintain identical topology, isolation, voltage rating, switching frequency, duty cycle, fault protection features, control characteristics, operating temperature range, package configuration, and mounting type. Selection among parametric equivalents depends solely on the required power output for the specific application.

Compliance Considerations: All active substitute parts carry RoHS compliance certification. The obsolete TOP267VGAU does not specify RoHS status. For new designs or applications with regulatory requirements, active substitute parts are preferred.

Frequently Asked Questions (FAQ)

Q: Can TOP267VG directly replace TOP267VGAU in existing designs?

A: Yes. TOP267VG is the direct equivalent with identical electrical and mechanical specifications. Both parts feature 44W power output, 725V breakdown voltage, 66kHz/132kHz switching frequency, 78% duty cycle, and 12-SDIP eDIP-12 package configuration. The primary difference is product status: TOP267VG is active with RoHS compliance, while TOP267VGAU is obsolete.

Q: What determines whether a substitute part from the TOPSwitch®-JX family is compatible?

A: Compatibility is determined by matching all fixed parameters: manufacturer (Power Integrations), series (TOPSwitch®-JX), topology (Flyback), isolation (Isolated), voltage rating (725V), switching frequency (66kHz/132kHz), duty cycle (78%), fault protection features, control features, operating temperature range (-40°C to 150°C), package type (12-SDIP eDIP-12), and mounting type (Through Hole). Power output is the only variable parameter that distinguishes parts within this family.

Q: Can I use TOP264VG (34W) in an application originally designed for TOP267VGAU (44W)?

A: No. TOP264VG has lower power output (34W) than the original specification (44W). Using an undersized part may result in insufficient power delivery and circuit malfunction. Substitute parts must meet or exceed the original power requirement.

Q: Can I use TOP271VG (59W) in an application originally designed for TOP267VGAU (44W)?

A: TOP271VG has higher power output (59W) than the original specification (44W). While the part shares all other electrical and mechanical parameters, the higher power rating may introduce design considerations related to thermal management and component stress. Application-specific evaluation is necessary.

Q: Are all substitute parts available in the same package configuration?

A: All substitute parts use the 12-SDIP (0.412", 10.46mm) package with 11 leads and exposed pad, configured as eDIP-12 for through-hole mounting. Package compatibility is guaranteed across all listed substitutes.

Q: What is the difference between TOP267VG and TOP267VGAU?

A: TOP267VG and TOP267VGAU are functionally identical with the same 44W power output and electrical specifications. The primary differences are: (1) TOP267VG carries active product status while TOP267VGAU is obsolete, (2) TOP267VG is RoHS compliant while TOP267VGAU does not specify RoHS status, and (3) TOP267VG is supplied in Tube packaging while TOP267VGAU packaging is not specified.

Q: Which substitute part should I select if my application requires 50W output?

A: TOP269VG (51W) is the closest match for 50W requirement, providing 51W output capacity. TOP268VG (48W) falls slightly below the requirement. Selection between these parts depends on whether the application can operate with 48W or requires the additional 51W capacity of TOP269VG.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (TOP267VG, TOP264VG, TOP265VG, TOP266VG, TOP268VG, TOP269VG, TOP270VG, TOP271VG) carry RoHS compliance certification. The obsolete TOP267VGAU does not specify RoHS status.

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