TOP222GN-TL Equivalent & Substitute Parts

Part Overview

The TOP222GN-TL is an offline switch IC manufactured by Power Integrations, part of the TOPSwitch®-II series. This device functions as a converter for offline Boost, Buck, Flyback, and Forward topologies with 100kHz switching frequency and 15W power output. The part is marked as Not For New Designs, indicating it has been superseded in the product lifecycle. Organizations using this component in active designs require equivalent or substitute parts to ensure supply continuity and design flexibility.

Substiute Parts

TOP222GN-TL

Power IntegrationsIn Stock: 8808TOP222GN-TL Datasheet

Current PartRFQ

TOP242GN-TL

Power IntegrationsIn Stock: 23383TOP242GN-TL Datasheet

SimilarRFQ

TOP221GN-TL

Power IntegrationsIn Stock: 10339TOP221GN-TL Datasheet

Parametric EquivalentRFQ

TOP223GN-TL

Power IntegrationsIn Stock: 4469TOP223GN-TL Datasheet

Parametric EquivalentRFQ

TOP224GN-TL

Power IntegrationsIn Stock: 16688TOP224GN-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP222GN-TL is determined by the following critical parameters:

Topology Compatibility: The TOP222GN-TL supports Boost, Buck, Flyback, and Forward topologies. Substitute parts must support the same topology or a subset thereof to maintain circuit functionality.

Voltage Rating: The 700V breakdown voltage is a fundamental electrical specification. All substitute parts must maintain this voltage rating to ensure safe operation within the same power supply design envelope.

Switching Frequency: The 100kHz switching frequency determines transformer design, filter component selection, and EMI characteristics. Substitute parts operating at the same frequency ensure direct compatibility without circuit redesign.

Power Output: The 15W power rating defines the thermal and current handling capability. Substitute parts with equal or higher power ratings can replace the TOP222GN-TL; lower-rated parts are not suitable.

Duty Cycle: The 67% duty cycle is integral to the control architecture. Substitute parts must maintain this specification for proper converter operation.

Package and Mounting: The 8-SMD Gull Wing surface mount package ensures PCB footprint compatibility. Substitute parts must use identical or compatible packaging.

Fault Protection Features: Current Limiting and Over Temperature protection are mandatory safety functions. Substitute parts must include these protections as minimum requirements.

Operating Temperature Range: The -40°C to 150°C junction temperature range defines the thermal operating envelope. Substitute parts must support this range.

The TOP222GN-TL has four direct substitutes within the TOPSwitch®-II series: TOP221GN-TL (9W), TOP223GN-TL (25W), TOP224GN-TL (30W), and TOP242GN-TL (15W, TOPSwitch®-GX series).

Parameter Comparison

Engineering Selection Recommendations

TOPSwitch®-II Series Substitutes (TOP221GN-TL, TOP223GN-TL, TOP224GN-TL)

These three parts share identical electrical and thermal characteristics with the TOP222GN-TL: 700V breakdown voltage, 100kHz switching frequency, 67% duty cycle, -40°C to 150°C operating temperature, and identical package specifications. The primary differentiation is power output rating.

TOP221GN-TL (9W) is suitable only for applications where the original 15W design includes power margin. This part is not recommended as a direct replacement for designs operating near the 15W specification.

TOP223GN-TL (25W) and TOP224GN-TL (30W) are suitable for direct replacement in TOP222GN-TL applications. Both parts provide increased power headroom and are pin-compatible with identical package geometry. These parts are preferred for new procurement due to higher availability (4,400 and 16,600 units respectively versus 8,721 units for TOP222GN-TL).

TOPSwitch®-GX Series Substitute (TOP242GN-TL)

The TOP242GN-TL operates in a different product series (TOPSwitch®-GX) with the following distinctions:

Topology is limited to Flyback only, whereas TOP222GN-TL supports Boost, Buck, Flyback, and Forward. This part is suitable only for Flyback topology applications.

Switching frequency range is 66kHz to 132kHz (variable) compared to fixed 100kHz. This frequency variation requires transformer and filter component re-evaluation.

Duty cycle is 66.5% versus 67%, a negligible difference.

Additional Over Voltage protection and Frequency Control features are included.

Package designation is SMD-8B (7 leads) versus standard 8-SMD, requiring PCB footprint verification.

The TOP242GN-TL is suitable for Flyback-only designs where the variable frequency and additional protection features provide system benefits. Packaging compatibility must be confirmed before selection.

Compliance and Regulatory Status

All substitute parts maintain RoHS Compliance, REACH Unaffected status, and identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. All parts carry Moisture Sensitivity Level 4 (72 Hours), requiring identical handling and storage protocols.

All substitute parts retain "Not For New Designs" status, indicating the entire TOPSwitch®-II and TOPSwitch®-GX series are in end-of-life phase. For new design initiatives, consultation with Power Integrations for current-generation alternatives is required.

Frequently Asked Questions (FAQ)

Q: Can TOP221GN-TL replace TOP222GN-TL in all applications?

A: No. TOP221GN-TL has a 9W power rating versus 15W for TOP222GN-TL. Substitution is valid only if the original design operates with sufficient power margin below 9W. For designs utilizing the full 15W capacity, TOP221GN-TL is not suitable.

Q: Are TOP223GN-TL and TOP224GN-TL direct pin-for-pin replacements?

A: Yes. Both parts use identical 8-SMD Gull Wing packaging with the same pinout as TOP222GN-TL. PCB footprints are directly compatible. The higher power ratings (25W and 30W respectively) provide additional thermal and current capacity without circuit modification.

Q: Why is TOP242GN-TL listed as a substitute if it only supports Flyback topology?

A: TOP242GN-TL is a valid substitute only for applications using Flyback topology. For designs utilizing Boost, Buck, or Forward topologies, TOP242GN-TL is not compatible. Topology verification is mandatory before selection.

Q: What is the impact of TOP242GN-TL's variable switching frequency (66kHz to 132kHz)?

A: The variable frequency range requires re-evaluation of transformer design, output filter components, and EMI characteristics. Fixed 100kHz designs cannot directly use TOP242GN-TL without circuit analysis and potential component changes. This part is not recommended for direct substitution in fixed-frequency designs.

Q: Does TOP242GN-TL's additional Over Voltage protection feature require circuit changes?

A: No. The Over Voltage protection is an internal feature that enhances system safety. No circuit modifications are required to utilize this protection. However, the SMD-8B package (7 leads) differs from the standard 8-SMD package, requiring PCB footprint verification.

Q: Are all substitute parts available in the same packaging options (Tape & Reel)?

A: No. TOP222GN-TL, TOP221GN-TL, TOP223GN-TL, and TOP224GN-TL are available in Tape & Reel (TR) packaging. TOP242GN-TL is supplied in Cut Tape (CT) packaging. Procurement and assembly processes may require adjustment based on packaging type.

Q: What is the significance of "Not For New Designs" status for all parts?

A: This status indicates the entire TOPSwitch®-II and TOPSwitch®-GX series are in end-of-life phase. These parts are suitable for sustaining existing designs and legacy product support only. New design initiatives should not select these parts. Contact Power Integrations for current-generation offline switch alternatives.

Q: Can I use TOP223GN-TL or TOP224GN-TL in a design rated for 15W if I reduce the load?

A: Yes. TOP223GN-TL (25W) and TOP224GN-TL (30W) are rated for higher power output than TOP222GN-TL (15W). Operating these parts at 15W or below is within specification and does not create reliability concerns. The higher power rating provides design margin and thermal headroom.

Q: What are the moisture sensitivity implications for all substitute parts?

A: All parts carry Moisture Sensitivity Level 4 (72 Hours). This requires storage in dry conditions and baking before reflow soldering if moisture absorption occurs. Handling and storage protocols must be identical across all substitute parts.

Q: Is there a preferred substitute part for general replacement purposes?

A: For direct replacement in existing TOP222GN-TL applications, TOP224GN-TL (30W) is preferred due to highest availability (16,600 units), identical electrical specifications, and superior power margin. TOP223GN-TL (25W) is a secondary choice with adequate availability (4,400 units).