TOP234GN Equivalent & Substitute Parts Reference

Part Overview

The TOP234GN is an offline flyback converter IC from Power Integrations' TOPSwitch®-FX series, designed for isolated power supply applications with 30W output capability. This component integrates a high-voltage switch with frequency control and comprehensive fault protection in an 8-SMD package.

The TOP234GN is currently discontinued at DiGi Electronics. Locating equivalent or substitute components is necessary for ongoing production support, design revisions, and inventory replenishment. This reference provides direct substitution options based on electrical and mechanical compatibility parameters.

Substiute Parts

TOP234GN

Power IntegrationsIn Stock: 4762TOP234GN Datasheet

Current PartRFQ

TOP234GN-TL

Power IntegrationsIn Stock: 2153TOP234GN-TL Datasheet

SimilarRFQ

TOP244GN-TL

Power IntegrationsIn Stock: 25093TOP244GN-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP234GN is determined by the following critical parameters:

Primary Compatibility Criteria:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Package / Case: 8-SMD (7 Leads), Gull Wing form factor
• Supplier Device Package: SMD-8B
• Mounting Type: Surface Mount
• Voltage - Breakdown: 700V minimum
• Frequency - Switching: 66kHz ~ 132kHz range
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control capability

Identified Substitute Parts:

1. TOP234GN-TL – Direct equivalent with identical electrical specifications and packaging. Differs only in product status (Obsolete) and packaging format (Cut Tape & Digi-Reel®).

2. TOP244GN-TL – Compatible substitute from TOPSwitch®-GX series. Maintains core topology, isolation, package, and thermal specifications. Power rating is 28W (versus 30W) and duty cycle is 66.5% (versus 78%).

Parameter Comparison

Engineering Selection Recommendations

TOP234GN-TL Selection: TOP234GN-TL is the direct electrical equivalent of TOP234GN. Both components share identical specifications across all critical parameters: 30W power rating, 78% duty cycle, TOPSwitch®-FX series architecture, and identical thermal operating range. The only differences are product status (Obsolete versus Discontinued) and packaging format (Cut Tape & Digi-Reel® versus standard). This part is suitable for direct replacement in existing designs where the original TOP234GN is no longer available. Current inventory of 2100 units is available.

TOP244GN-TL Selection: TOP244GN-TL is a compatible substitute from the TOPSwitch®-GX series. It maintains all core functional requirements: flyback topology, isolated output, 700V breakdown voltage, 66kHz–132kHz switching frequency, and identical package/thermal specifications. The TOP244GN-TL differs in power rating (28W versus 30W) and duty cycle (66.5% versus 78%). This component is suitable for applications where the 28W power capability is sufficient. The TOP244GN-TL has the highest current inventory availability (25072 units) among all listed substitutes. Product status is "Not For New Designs," indicating limited long-term support.

Both substitute parts maintain RoHS compliance and identical MSL ratings, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can TOP234GN-TL be used as a direct replacement for TOP234GN?

A: Yes. TOP234GN-TL is electrically and mechanically identical to TOP234GN. Both components are from the TOPSwitch®-FX series with 30W power rating, 78% duty cycle, and identical package specifications (8-SMD, Gull Wing). The only differences are product status and packaging format (Cut Tape & Digi-Reel® versus standard). Direct substitution is supported.

Q: What are the key differences between TOP234GN and TOP244GN-TL?

A: Both components share the same topology (Flyback), isolation (Isolated), package (8-SMD, Gull Wing), and thermal range (-40°C to 150°C). The TOP244GN-TL differs in two parameters: power rating (28W versus 30W) and duty cycle (66.5% versus 78%). The TOP244GN-TL is from the TOPSwitch®-GX series, while TOP234GN is from TOPSwitch®-FX. Substitution is valid for applications where 28W power capability is acceptable.

Q: Are all substitute parts RoHS compliant?

A: Yes. TOP234GN-TL and TOP244GN-TL are both RoHS Compliant. All three components (TOP234GN, TOP234GN-TL, and TOP244GN-TL) meet RoHS requirements and are REACH Unaffected.

Q: What is the significance of the MSL rating for these components?

A: All three components carry MSL 4 (72 Hours) rating. This indicates that the components must be stored in controlled humidity conditions and have a 72-hour floor life after exposure to ambient conditions. Standard moisture-sensitive device handling procedures apply to all substitutes.

Q: Which substitute part has the best inventory availability?

A: TOP244GN-TL has the highest current inventory with 25,072 units in stock, compared to 2,100 units for TOP234GN-TL and 4,700 units for TOP234GN. However, TOP244GN-TL has a "Not For New Designs" status, indicating limited long-term support.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three components use the same package specification: 8-SMD (7 Leads), Gull Wing form factor with SMD-8B supplier device package designation. Surface mount mounting type is identical. PCB layout and footprint compatibility is maintained across all substitutes.

Q: What fault protection features are included in the substitute parts?

A: All three components (TOP234GN, TOP234GN-TL, and TOP244GN-TL) include identical fault protection: Current Limiting, Over Temperature, and Over Voltage protection. Frequency Control is the control feature across all parts.