TOP223P Equivalent & Substitute Parts Reference

Part Overview

The TOP223P is an offline switch IC from Power Integrations' TOPSwitch®-II series, designed for isolated power conversion applications. This component functions as a converter for Boost, Buck, Flyback, and Forward topologies with 100kHz switching frequency and 25W power output capability. The TOP223P is classified as Obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and production continuity. Alternative models within the TOPSwitch®-II family provide functional equivalence with updated product status and compliance certifications.

Substiute Parts

TOP223P

Power IntegrationsIn Stock: 2781TOP223P Datasheet

Current PartRFQ

TOP223PN

Power IntegrationsIn Stock: 19404TOP223PN Datasheet

DirectRFQ

TOP221PN

Power IntegrationsIn Stock: 17224TOP221PN Datasheet

Parametric EquivalentRFQ

TOP222PN

Power IntegrationsIn Stock: 17336TOP222PN Datasheet

Parametric EquivalentRFQ

TOP224PN

Power IntegrationsIn Stock: 18350TOP224PN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP223P is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package / Case: 8-DIP (0.300", 7.62mm) — identical physical footprint required
• Mounting Type: Through Hole — PCB assembly compatibility
• Voltage - Breakdown: 700V — electrical stress rating
• Topology: Boost, Buck, Flyback, Forward — functional capability set
• Frequency - Switching: 100kHz — timing and control compatibility
• Duty Cycle: 67% — operational envelope
• Fault Protection: Current Limiting, Over Temperature — safety feature set
• Operating Temperature: -40°C ~ 150°C (TJ) — thermal operating range
• Output Isolation: Isolated — circuit architecture requirement
• Internal Switch(s): Yes — integrated switching element

Power Rating Consideration: The TOP223P delivers 25W output power. Substitute parts are grouped by power rating: TOP221PN (9W), TOP222PN (15W), TOP223PN (25W), and TOP224PN (30W). Selection depends on application power requirements.

Product Status and Compliance: The TOP223P is Obsolete and RoHS non-compliant. Direct equivalent TOP223PN is Not For New Designs but RoHS Compliant. Parametric equivalents TOP221PN, TOP222PN, and TOP224PN are also Not For New Designs but RoHS Compliant, offering compliance upgrade paths.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Power Rating): TOP223PN is the direct equivalent to TOP223P, maintaining identical 25W power output. TOP223PN provides RoHS Compliance upgrade while preserving all electrical and mechanical specifications. This part is suitable for replacement in existing designs where 25W power handling is required.

Parametric Equivalents (Alternative Power Ratings):

• TOP221PN (9W): For applications requiring lower power output within the same topology and package footprint
• TOP222PN (15W): For applications requiring mid-range power output
• TOP224PN (30W): For applications requiring higher power output capacity

All substitute parts maintain identical package, mounting type, voltage rating, topology support, switching frequency, duty cycle, fault protection features, operating temperature range, and isolation characteristics as the TOP223P.

Compliance Consideration: The TOP223P is RoHS non-compliant. All substitute parts (TOP223PN, TOP221PN, TOP222PN, TOP224PN) are RoHS Compliant, providing regulatory compliance upgrade for new production and design revisions.

Product Status: The TOP223P is Obsolete. All substitute parts carry Not For New Designs status, indicating limited availability for future procurement. Component selection should account for long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can TOP223PN directly replace TOP223P in existing PCB designs? A: Yes. TOP223PN is the direct equivalent with identical package (8-DIP), mounting type (Through Hole), electrical specifications (700V breakdown, 100kHz switching, 25W power, 67% duty cycle), and functional topology support (Boost, Buck, Flyback, Forward). PCB layout and schematic connections require no modification.

Q: What is the difference between TOP223P and TOP223PN? A: The primary differences are product status and RoHS compliance. TOP223P is Obsolete and RoHS non-compliant. TOP223PN is Not For New Designs but RoHS Compliant. All electrical and mechanical parameters are identical.

Q: Can I use TOP221PN, TOP222PN, or TOP224PN as substitutes for TOP223P? A: These are parametric equivalents, not direct replacements. They share identical package, mounting, voltage rating, topology, switching frequency, duty cycle, fault protection, operating temperature, and isolation characteristics. The key difference is power rating: TOP221PN (9W), TOP222PN (15W), TOP224PN (30W) versus TOP223P (25W). Selection depends on application power requirements.

Q: Are all substitute parts available in the same packaging? A: Yes. TOP223PN, TOP221PN, TOP222PN, and TOP224PN are all supplied in 8-DIP (0.300", 7.62mm) package with Through Hole mounting type, identical to TOP223P.

Q: What is the operating temperature range for substitute parts? A: All substitute parts operate across -40°C to 150°C junction temperature (TJ), matching the TOP223P specification.

Q: Do substitute parts support the same converter topologies as TOP223P? A: Yes. All substitute parts support Boost, Buck, Flyback, and Forward topologies with 100kHz switching frequency and 67% duty cycle, identical to TOP223P.

Q: What fault protection features are included in substitute parts? A: All substitute parts include Current Limiting and Over Temperature fault protection, matching TOP223P protection features.

Q: Is moisture sensitivity a concern when selecting substitutes? A: No. All parts, including TOP223P and all substitutes, carry Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity constraints.

Q: Which substitute part should I select for new designs? A: For new designs requiring 25W power output, TOP223PN is the appropriate selection, offering RoHS Compliance and identical electrical specifications. For alternative power requirements, select TOP221PN (9W), TOP222PN (15W), or TOP224PN (30W) based on application power budget.