TOP222PN Equivalent & Substitute Parts

Part Overview

The TOP222PN is an offline switch IC manufactured by Power Integrations, designed for isolated power conversion applications. This device operates as a multi-topology converter supporting Boost, Buck, Flyback, and Forward topologies with a 15W power rating and 100kHz switching frequency. The TOP222PN is classified as "Not For New Designs," indicating it is a legacy product. For new applications or when TOP222PN inventory becomes unavailable, equivalent and substitute parts from Power Integrations' current product lines provide functional alternatives with enhanced features and active product status.

Substiute Parts

TOP222PN

Power IntegrationsIn Stock: 17336TOP222PN Datasheet

Current PartRFQ

TNY288PG

Power IntegrationsIn Stock: 65310TNY288PG Datasheet

SimilarRFQ

TOP242PN

Power IntegrationsIn Stock: 1754TOP242PN Datasheet

SimilarRFQ

TOP221PN

Power IntegrationsIn Stock: 17224TOP221PN Datasheet

Parametric EquivalentRFQ

TOP223PN

Power IntegrationsIn Stock: 19404TOP223PN Datasheet

Parametric EquivalentRFQ

TOP224PN

Power IntegrationsIn Stock: 18350TOP224PN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP222PN is determined by the following critical parameters:

Topology Compatibility: The TOP222PN supports multiple topologies (Boost, Buck, Flyback, Forward). Substitutes must support the specific topology required by the application circuit.

Power Rating: The 15W power rating defines the maximum output power capability. Substitutes with equal or higher power ratings are acceptable for direct replacement.

Package and Pinout: The 8-DIP (0.300", 7.62mm) through-hole package is a primary mechanical constraint. All substitutes must use identical or compatible package specifications.

Voltage Breakdown Rating: The 700V breakdown voltage establishes the maximum input voltage capability. Substitutes with equal or higher breakdown voltage ratings maintain or exceed this specification.

Switching Frequency: The 100kHz switching frequency influences transformer design and EMI characteristics. Substitutes with similar or compatible frequency ranges support equivalent circuit designs.

Fault Protection Features: Current limiting and over-temperature protection are baseline requirements. Substitutes with additional protection features (over-voltage, short-circuit) provide enhanced reliability.

Product Status and Compliance: RoHS compliance and REACH status ensure regulatory alignment. Active product status indicates ongoing manufacturer support and availability.

Parameter Comparison

Engineering Selection Recommendations

For Multi-Topology Applications (Boost, Buck, Flyback, Forward):

TOP221PN, TOP223PN, and TOP224PN are parametric equivalents within the TOPSwitch®-II series. Selection among these parts depends on power rating requirements:

• TOP221PN (9W): Suitable for lower-power applications requiring multi-topology support.
• TOP222PN (15W): Original specification; use when legacy product support is required.
• TOP223PN (25W): Appropriate for mid-range power applications.
• TOP224PN (30W): Suitable for higher-power applications within the multi-topology family.

All four parts share identical switching frequency (100kHz), duty cycle (67%), voltage breakdown (700V), and operating temperature range. These parts are classified as "Not For New Designs," indicating they are legacy products with limited future availability.

For Flyback-Only Topologies with Active Product Status:

TNY288PG (TinySwitch®-4 series) is the only substitute with "Active" product status, providing ongoing manufacturer support and availability. This part supports Flyback topology exclusively with 16W power rating, 124kHz~140kHz switching frequency, and enhanced fault protection including over-voltage and short-circuit detection. The TNY288PG is suitable for new designs requiring Flyback conversion.

TOP242PN (TOPSwitch®-GX series) supports Flyback topology with 15W power rating and variable switching frequency (66kHz~132kHz). This part is classified as "Not For New Designs" but provides frequency control capability.

Compliance and Regulatory Considerations:

All listed substitutes maintain RoHS compliance and REACH unaffected status, ensuring regulatory alignment with TOP222PN. Through-hole mounting is consistent across all options, supporting direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can TOP221PN replace TOP222PN in existing designs?

A: TOP221PN is a parametric equivalent supporting identical topologies, switching frequency, and voltage ratings. The primary difference is power rating: TOP221PN is rated for 9W versus TOP222PN's 15W. Substitution is valid only if the application power requirement does not exceed 9W. All other electrical and thermal characteristics are equivalent.

Q: What is the key difference between TOP223PN and TOP224PN?

A: Both parts are TOPSwitch®-II series devices with identical electrical specifications except power rating. TOP223PN is rated for 25W, while TOP224PN is rated for 30W. Selection depends on the application's maximum power requirement. Both support multi-topology operation at 100kHz switching frequency.

Q: Why is TNY288PG classified as "Active" while other substitutes are "Not For New Designs"?

A: TNY288PG belongs to the TinySwitch®-4 series, which is Power Integrations' current-generation product line with ongoing development and support. TOP221PN, TOP222PN, TOP223PN, and TOP224PN are legacy TOPSwitch®-II series devices. For new designs, TNY288PG is the recommended choice when Flyback topology is sufficient. For multi-topology requirements, alternative current-generation series should be evaluated.

Q: Can TNY288PG replace TOP222PN in a multi-topology application?

A: No. TNY288PG supports Flyback topology exclusively, while TOP222PN supports Boost, Buck, Flyback, and Forward topologies. Substitution is valid only if the application circuit uses Flyback topology. If multi-topology capability is required, TNY288PG is not suitable.

Q: What are the package compatibility considerations?

A: All listed substitutes use 8-DIP through-hole packages with 0.300" (7.62mm) spacing. TOP242PN and TNY288PG are specified as 8-DIP with 7 leads, while TOP221PN, TOP222PN, TOP223PN, and TOP224PN use standard 8-DIP pinout. Verify pinout compatibility with application schematic before substitution, as lead count differences may indicate functional variations.

Q: Does TNY288PG provide better protection than TOP222PN?

A: TNY288PG includes additional fault protection features: over-voltage and short-circuit detection, plus open-loop operation capability. TOP222PN provides current limiting and over-temperature protection. Enhanced protection in TNY288PG improves system reliability but requires circuit design verification to ensure compatibility with these additional protection mechanisms.

Q: What switching frequency range is acceptable for substitution?

A: TOP222PN operates at fixed 100kHz. TOP242PN operates at 66kHz~132kHz (variable), and TNY288PG operates at 124kHz~140kHz. Substitution with variable-frequency parts requires transformer and filter design review, as switching frequency directly affects component sizing and EMI characteristics. Fixed-frequency substitutes (TOP221PN, TOP223PN, TOP224PN at 100kHz) maintain identical frequency characteristics.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed substitutes (TOP221PN, TOP223PN, TOP224PN, TOP242PN, TNY288PG) are RoHS compliant and REACH unaffected, matching TOP222PN's regulatory status.