TOP202YN Equivalent & Substitute Parts

Part Overview

The TOP202YN is an offline switching converter IC manufactured by Power Integrations, designed for multiple topologies including Boost, Buck, Flyback, and Forward configurations. This component operates at 100kHz switching frequency with a maximum power rating of 75W and 700V breakdown voltage. The device is classified as Obsolete, indicating it is no longer in active production. Finding equivalent or substitute parts is necessary for ongoing system maintenance, design updates, and procurement continuity when original inventory becomes unavailable.

Substiute Parts

TOP202YN

Power IntegrationsIn Stock: 10286TOP202YN Datasheet

Current PartRFQ

TOP244YN

Power IntegrationsIn Stock: 3712TOP244YN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP202YN is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - Breakdown rating (minimum 700V required)
• Power rating (minimum 75W required)
• Switching frequency range (100kHz nominal)
• Duty cycle tolerance (67% nominal)
• Fault protection features (Current Limiting, Over Temperature minimum)

Mechanical Compatibility Criteria:

• Package type and pin configuration
• Mounting type (Through Hole)
• Operating temperature range (-40°C ~ 150°C TJ)

Functional Compatibility Criteria:

• Topology support (Flyback topology is common across TOPSwitch family)
• Internal switch presence (required)
• Output isolation capability

The TOP244YN is identified as a substitute part within the TOPSwitch® family. While it operates in a different package configuration (TO-220-7C versus TO-220-3) and supports Flyback topology specifically, it meets the core electrical requirements for offline converter applications.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The TOP244YN can serve as a substitute for the TOP202YN in Flyback topology applications where the following conditions are met:

1. Power Rating Alignment: The application power requirement does not exceed 65W. If the original design requires the full 75W capability of the TOP202YN, the TOP244YN may not be suitable without circuit redesign.

2. Topology Limitation: The application must operate in Flyback topology. The TOP202YN supports multiple topologies (Boost, Buck, Flyback, Forward), while the TOP244YN is limited to Flyback. If the original design uses Boost, Buck, or Forward topology, substitution is not feasible.

3. Package Modification: The TOP244YN uses TO-220-7C package versus the TOP202YN TO-220-3 package. PCB layout modification is required, including changes to pin connections and thermal management considerations.

4. Compliance Status: The TOP244YN is RoHS Compliant, whereas the TOP202YN compliance status is not specified. For applications requiring RoHS compliance, the TOP244YN provides documented compliance. Both parts are REACH Unaffected and classified as EAR99.

5. Product Lifecycle: Both parts have limited lifecycle status (Obsolete and Not For New Designs respectively). For new designs, consultation with Power Integrations for current-generation alternatives is recommended.

Frequently Asked Questions (FAQ)

Q: Can the TOP244YN directly replace the TOP202YN without PCB modifications?

A: No. The TOP244YN uses a TO-220-7C package with 6 leads, while the TOP202YN uses TO-220-3 package with 3 leads. PCB layout changes are required, including pin routing and potentially thermal management modifications.

Q: What is the primary limitation when substituting TOP244YN for TOP202YN?

A: The TOP244YN supports only Flyback topology, whereas the TOP202YN supports Boost, Buck, Flyback, and Forward topologies. Substitution is only viable for Flyback applications.

Q: Is the TOP244YN suitable for applications requiring 75W output?

A: No. The TOP244YN is rated for 65W maximum power, which is 10W below the TOP202YN rating. Applications requiring the full 75W capability require alternative solutions.

Q: What additional protection does the TOP244YN provide compared to the TOP202YN?

A: The TOP244YN includes Over Voltage protection in addition to Current Limiting and Over Temperature protection. The TOP202YN provides Current Limiting and Over Temperature protection only.

Q: Are both parts suitable for new designs?

A: No. The TOP202YN is classified as Obsolete, and the TOP244YN is classified as Not For New Designs. Both parts have limited lifecycle status. For new designs, current-generation Power Integrations components should be evaluated.

Q: What is the switching frequency difference between these parts?

A: The TOP202YN operates at a fixed 100kHz switching frequency. The TOP244YN features Frequency Control with a range of 66kHz to 132kHz, allowing dynamic frequency adjustment within this range.

Q: Do both parts meet the same operating temperature range?

A: Yes. Both the TOP202YN and TOP244YN operate across the identical temperature range of -40°C to 150°C (TJ).

Q: Is the TOP244YN RoHS compliant?

A: Yes. The TOP244YN is RoHS Compliant. The TOP202YN RoHS compliance status is not specified in the available documentation.