TOP223Y Equivalent & Substitute Parts Reference

Part Overview

The TOP223Y is an offline switching converter IC manufactured by Power Integrations, part of the TOPSwitch®-II series. This device integrates a high-voltage power switch with control circuitry for isolated power supply applications supporting Boost, Buck, Flyback, and Forward topologies at 100kHz switching frequency with 50W power rating.

The TOP223Y carries an Obsolete product status. Direct substitution requires identifying equivalent models within the TOPSwitch®-II family that maintain electrical and mechanical compatibility while offering current availability and improved compliance status.

Substiute Parts

TOP223Y

Power IntegrationsIn Stock: 1442TOP223Y Datasheet

Current PartRFQ

TOP223YN

Power IntegrationsIn Stock: 25262TOP223YN Datasheet

DirectRFQ

TOP221YN

Power IntegrationsIn Stock: 5612TOP221YN Datasheet

Parametric EquivalentRFQ

TOP222YN

Power IntegrationsIn Stock: 56502TOP222YN Datasheet

Parametric EquivalentRFQ

TOP224YN

Power IntegrationsIn Stock: 39324TOP224YN Datasheet

Parametric EquivalentRFQ

TOP225YN

Power IntegrationsIn Stock: 8544TOP225YN Datasheet

Parametric EquivalentRFQ

TOP226YN

Power IntegrationsIn Stock: 9926TOP226YN Datasheet

Parametric EquivalentRFQ

TOP227YN

Power IntegrationsIn Stock: 10455TOP227YN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the TOPSwitch®-II family is determined by the following fixed parameters that must remain constant across all equivalent parts:

Fixed Compatibility Parameters:

• Manufacturer: Power Integrations
• Series: TOPSwitch®-II
• Package / Case: TO-220-3
• Mounting Type: Through Hole
• Voltage - Breakdown: 700V
• Topology Support: Boost, Buck, Flyback, Forward
• Frequency - Switching: 100kHz
• Duty Cycle: 67%
• Fault Protection: Current Limiting, Over Temperature
• Operating Temperature: -40°C ~ 150°C (TJ)
• Output Isolation: Isolated
• Internal Switch(s): Yes
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameter (Power Rating): The power rating in watts differentiates models within the series. Substitute parts are grouped by their power output capability, ranging from 12W to 150W. Selection depends on application power requirements.

Direct Substitute (Same Power Rating): TOP223YN maintains the 50W power rating of TOP223Y with improved RoHS compliance and current availability.

Parametric Equivalents (Different Power Ratings): TOP221YN (12W), TOP222YN (25W), TOP224YN (75W), TOP225YN (100W), TOP226YN (125W), and TOP227YN (150W) provide alternative power ratings while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (50W Applications): TOP223YN is the primary substitute for TOP223Y. Both devices maintain identical power rating, electrical specifications, and mechanical compatibility. TOP223YN offers improved RoHS compliance status and significantly higher inventory availability (25200 units versus 1370 units). Packaging format changes from bulk to tube.

For Power Rating Adjustment: When application requirements differ from the original 50W specification, select from the parametric equivalent series based on actual power demand:

• TOP221YN for applications requiring 12W output
• TOP222YN for applications requiring 25W output
• TOP224YN for applications requiring 75W output
• TOP225YN for applications requiring 100W output
• TOP226YN for applications requiring 125W output
• TOP227YN for applications requiring 150W output

All substitute options maintain RoHS compliance and current production status classification of "Not For New Designs," indicating mature product lines with stable specifications and established supply chains.

Frequently Asked Questions (FAQ)

Q: Can TOP223YN directly replace TOP223Y in existing designs? A: Yes. TOP223YN maintains identical electrical specifications, power rating (50W), package type (TO-220-3), and mounting configuration (Through Hole). The primary differences are improved RoHS compliance and packaging format (tube instead of bulk). PCB layout and circuit design require no modification.

Q: What determines compatibility between TOP223Y and other TOPSwitch®-II models? A: Compatibility is determined by fixed parameters: 700V breakdown voltage, 100kHz switching frequency, 67% duty cycle, isolated output, TO-220-3 package, and -40°C to 150°C operating temperature range. Power rating is the primary variable parameter that differentiates models within the series.

Q: Can I use TOP222YN (25W) or TOP224YN (75W) instead of TOP223Y (50W)? A: Electrical and mechanical compatibility exists between all TOPSwitch®-II models listed. However, power rating mismatch requires circuit redesign. TOP222YN (25W) is unsuitable for applications requiring 50W output. TOP224YN (75W) provides excess capacity and may introduce design inefficiencies. Select the model matching your actual power requirement.

Q: What is the difference between TOP223Y and TOP223YN packaging? A: TOP223Y uses bulk packaging; TOP223YN uses tube packaging. Both contain identical die and electrical specifications. Tube packaging facilitates automated assembly processes and improves component handling. No functional difference exists between the two packaging formats.

Q: Why is TOP223Y marked Obsolete while TOP223YN is marked Not For New Designs? A: Obsolete status indicates TOP223Y is no longer manufactured and existing inventory is depleted. Not For New Designs indicates TOP223YN remains in production with stable specifications but is not recommended for new product development. For new designs, consider current-generation alternatives from Power Integrations; for legacy system support, TOP223YN provides direct compatibility.

Q: Are all substitute parts RoHS compliant? A: TOP223Y is RoHS non-compliant. All substitute parts listed (TOP223YN, TOP221YN, TOP222YN, TOP224YN, TOP225YN, TOP226YN, TOP227YN) are RoHS Compliant. This compliance improvement applies across the entire TOPSwitch®-II family.

Q: What is the Moisture Sensitivity Level (MSL) for these components? A: All parts in this family, including TOP223Y and all substitutes, carry MSL rating of 1 (Unlimited). This indicates unlimited shelf life without moisture control requirements, simplifying storage and logistics.