TOP222P Equivalent & Substitute Parts Reference

Part Overview

The TOP222P is an offline switch IC from Power Integrations' TOPSwitch®-II series, designed for isolated power conversion applications. This 8-PDIP through-hole component supports multiple topologies including Boost, Buck, Flyback, and Forward configurations with 15W output power capability and 100kHz switching frequency.

The TOP222P is classified as Obsolete. Locating equivalent substitute parts is necessary for design continuity, component availability, and supply chain management. The substitute parts listed maintain electrical and mechanical compatibility while offering improved product status and compliance certifications.

Substiute Parts

TOP222P

Power IntegrationsIn Stock: 1480TOP222P Datasheet

Current PartRFQ

TOP221PN

Power IntegrationsIn Stock: 17224TOP221PN Datasheet

Parametric EquivalentRFQ

TOP222PN

Power IntegrationsIn Stock: 17336TOP222PN 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 eligibility for the TOP222P is determined by strict adherence to the following parameters:

Critical Matching Parameters:

• Package / Case: 8-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Voltage - Breakdown: 700V
• Topology: Boost, Buck, Flyback, Forward
• Frequency - Switching: 100kHz
• Duty Cycle: 67%
• Output Isolation: Isolated
• Internal Switch(s): Yes
• Fault Protection: Current Limiting, Over Temperature
• Operating Temperature: -40°C ~ 150°C (TJ)
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameter (Power Rating):

• Power (Watts): Varies by part number

All substitute parts listed maintain identical electrical characteristics and physical form factor. Differences exist only in maximum power output ratings, which determine application suitability based on design requirements.

Parameter Comparison

Engineering Selection Recommendations

TOP222PN is the primary direct substitute for TOP222P. Both parts share identical 15W power rating and electrical specifications. TOP222PN offers improved RoHS compliance status and superior inventory availability (17300 pcs vs. 1374 pcs). Packaging format is Tube for TOP222PN versus unspecified for TOP222P.

TOP221PN is suitable for applications requiring 9W maximum output power. This part provides RoHS compliance and the highest inventory level (17200 pcs). Selection is appropriate when design power requirements do not exceed 9W.

TOP223PN accommodates designs requiring 25W output power. RoHS compliant with strong inventory position (19357 pcs). Selection is appropriate when design power requirements exceed 15W but do not exceed 25W.

TOP224PN supports designs requiring 30W maximum output power. RoHS compliant with adequate inventory (18245 pcs). Selection is appropriate for highest power applications within the TOPSwitch®-II series.

All substitute parts maintain identical package form factor (8-DIP through-hole), voltage ratings (700V breakdown), switching frequency (100kHz), topology support, and operating temperature range. Selection between alternatives depends solely on application power requirements and RoHS compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can TOP222PN directly replace TOP222P in existing designs?

A: Yes. TOP222PN and TOP222P share identical electrical specifications and 8-DIP through-hole package form factor. Both support 15W output power and all specified topologies. The primary difference is RoHS compliance status and packaging format (Tube vs. unspecified).

Q: What determines which substitute part to select?

A: Selection is determined by application power requirements. TOP221PN supports 9W maximum, TOP222PN supports 15W, TOP223PN supports 25W, and TOP224PN supports 30W. All other electrical and mechanical parameters remain constant across the series.

Q: Are all substitute parts compatible with existing PCB layouts?

A: Yes. All substitute parts use identical 8-DIP (0.300", 7.62mm) through-hole package specifications. PCB footprints and pin assignments are compatible across all listed parts.

Q: What is the significance of RoHS compliance differences?

A: TOP222P is RoHS non-compliant. All substitute parts (TOP221PN, TOP222PN, TOP223PN, TOP224PN) are RoHS Compliant. RoHS compliance may be required for applications subject to regulatory restrictions on hazardous substances.

Q: Do all parts support the same converter topologies?

A: Yes. All parts support Boost, Buck, Flyback, and Forward topologies with identical 100kHz switching frequency and 67% duty cycle.

Q: What is the difference between TOP222P and TOP222PN packaging?

A: TOP222P packaging is unspecified. TOP222PN is supplied in Tube packaging format. Both use identical 8-DIP through-hole form factor suitable for standard PCB assembly processes.

Q: Can TOP221PN be used in applications designed for TOP222P?

A: TOP221PN can be used only if application power requirements do not exceed 9W. All other electrical specifications are identical. If design requires 15W output power, TOP221PN is not suitable.

Q: Are there temperature or environmental differences between parts?

A: No. All parts operate across identical temperature range (-40°C ~ 150°C junction temperature) and share MSL 1 (Unlimited) moisture sensitivity rating.