TOP269VG Equivalent & Substitute Parts Reference

Part Overview

The TOP269VG is an offline flyback converter IC from Power Integrations' TOPSwitch®-JX series, designed for isolated power supply applications. This 51 W rated device operates at 66 kHz or 132 kHz switching frequencies and integrates an internal power switch with comprehensive fault protection including current limiting, overload, over-temperature, over-voltage, and short-circuit protection. The part is Active status and RoHS compliant, making it suitable for modern power management designs requiring galvanic isolation.

Equivalent and substitute parts within the TOPSwitch®-JX family are necessary when design requirements specify different power output levels, inventory availability constraints exist, or when component procurement from alternative stock sources is required.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution within the TOP269VG family is determined by the following critical parameters that remain constant across all equivalent parts:

Fixed Parameters (Identical Across All Substitutes):

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

Variable Parameter (Differentiates Substitutes):

Power (Watts): Ranges from 34 W to 59 W across the family

The TOP269VG and its substitutes share identical electrical characteristics, protection features, operating conditions, and physical packaging. The primary distinction is the rated power output, which scales across the product family. Selection of a substitute part depends on whether the application requires equal or different power handling capacity.

Parameter Comparison

Part Number	Power (Watts)	Voltage - Breakdown (V)	Switching Frequency (kHz)	Duty Cycle (%)	Operating Temperature (°C)	Package	Inventory (Pcs)
TOP269VG	51	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	4088
TOP264VG	34	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	35400
TOP265VG	36	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	2009
TOP266VG	39	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	35100
TOP267VG	44	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	15938
TOP268VG	48	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	1213
TOP270VG	55	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	4165
TOP271VG	59	725	66, 132	78	-40 to 150	12-SDIP eDIP-12	7200

Engineering Selection Recommendations

All parts listed are Active status products from Power Integrations and carry RoHS compliance certification. Selection criteria are based on power output requirements and inventory availability:

For Equal Power Handling (51 W): TOP269VG is the direct equivalent with 4088 units in stock.

For Lower Power Applications (Below 51 W): TOP264VG (34 W), TOP265VG (36 W), TOP266VG (39 W), or TOP267VG (44 W) are suitable substitutes. TOP264VG and TOP266VG offer the highest inventory availability at 35400 and 35100 units respectively.

For Higher Power Applications (Above 51 W): TOP270VG (55 W) or TOP271VG (59 W) provide increased power capacity within the same package and electrical framework.

All substitute parts maintain identical isolation characteristics, fault protection mechanisms, switching frequency options, duty cycle, breakdown voltage, operating temperature range, and through-hole eDIP-12 packaging. Physical board layout and PCB footprint compatibility is assured across all variants.

Frequently Asked Questions (FAQ)

Q: Can TOP264VG replace TOP269VG in an existing design?

A: TOP264VG is electrically and mechanically compatible with TOP269VG. However, TOP264VG is rated for 34 W output versus TOP269VG's 51 W. Substitution is valid only if the application power requirement does not exceed 34 W. All other electrical parameters, protection features, package dimensions, and pin configurations are identical.

Q: What is the primary difference between TOP269VG and TOP271VG?

A: The primary difference is rated power output: TOP269VG is 51 W while TOP271VG is 59 W. All other specifications including topology, isolation, voltage rating, switching frequency, duty cycle, fault protection, operating temperature, and physical packaging are identical. TOP271VG is suitable for applications requiring higher power capacity within the same design framework.

Q: Are all substitute parts in the same physical package?

A: Yes. All parts listed use the 12-SDIP (0.412", 10.46 mm) package with 11 leads and exposed pad. Through-hole mounting type is consistent across all variants. PCB footprint and board layout compatibility is maintained.

Q: What inventory considerations apply to substitution?

A: TOP264VG and TOP266VG have the highest inventory levels at 35400 and 35100 units respectively. TOP268VG has the lowest inventory at 1213 units. TOP269VG has 4088 units available. Inventory status should be considered when procurement lead time is a factor.

Q: Do all substitute parts maintain the same fault protection?

A: Yes. All parts in the TOPSwitch®-JX family listed here include identical fault protection: current limiting, overload, over-temperature, over-voltage, and short-circuit protection. Frequency control is also consistent across all variants.

Q: Is thermal management different between power ratings?

A: All parts operate within the same temperature range (-40°C to 150°C junction temperature) and share identical package construction with exposed pad. Thermal performance differences are determined by the specific power dissipation in the application circuit, not by inherent package differences.

Q: Are all parts RoHS compliant?

A: Yes. All substitute parts carry RoHS compliance certification and MSL rating of 1 (Unlimited), ensuring compatibility with modern manufacturing and environmental standards.

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