TOP244G Equivalent & Substitute Parts Reference

Part Overview

The TOP244G is an offline switch flyback converter IC from Power Integrations' TOPSwitch®-GX series, designed for isolated power supply applications with 28W output capability. This component operates in the 66kHz to 132kHz switching frequency range and integrates internal protection features including current limiting, over-temperature, and over-voltage protection.

The TOP244G is classified as obsolete product status. Locating equivalent substitute parts is necessary for ongoing production support, design revisions, and inventory replenishment where original stock becomes unavailable.

Substiute Parts

TOP244G

Power IntegrationsIn Stock: 851TOP244G Datasheet

Current PartRFQ

TOP244GN-TL

Power IntegrationsIn Stock: 25093TOP244GN-TL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP244G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 700V rating
• Power (Watts): 28W output capability
• Frequency - Switching: 66kHz ~ 132kHz range
• Duty Cycle: 66.5%
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 150°C (TJ)
• Package / Case: 8-SMD (7 Leads), Gull Wing
• Supplier Device Package: SMD-8B
• Mounting Type: Surface Mount
• Internal Switch(s): Yes

Allowable Variations:

• Packaging format (Tape & Reel vs. standard packaging)
• Product status (Obsolete vs. Not For New Designs)
• RoHS compliance status
• Moisture Sensitivity Level (MSL)

The TOP244GN-TL meets all mandatory matching parameters and qualifies as a direct substitute for the TOP244G.

Parameter Comparison

Engineering Selection Recommendations

TOP244GN-TL as Direct Substitute:

The TOP244GN-TL is electrically and mechanically equivalent to the TOP244G across all functional parameters. Both components share identical specifications for topology, isolation, voltage rating, power output, switching frequency, duty cycle, protection features, and thermal operating range.

Compliance Considerations:

The TOP244GN-TL offers improved RoHS compliance status (RoHS Compliant) compared to the TOP244G (RoHS non-compliant). This distinction is relevant for applications subject to RoHS regulatory requirements.

Packaging and Handling:

The TOP244GN-TL is supplied in Tape & Reel (TR) format with MSL rating of 4 (72 Hours), compared to the TOP244G standard packaging with MSL rating of 1 (Unlimited). Tape & Reel packaging requires moisture control during storage and handling within the specified 72-hour window after package opening.

Product Status:

The TOP244G is classified as Obsolete, while TOP244GN-TL is classified as Not For New Designs. For ongoing production support and inventory replenishment, the TOP244GN-TL provides continued availability from the manufacturer.

Frequently Asked Questions (FAQ)

Q: Can TOP244GN-TL replace TOP244G in existing designs?

A: Yes. The TOP244GN-TL is electrically and mechanically equivalent to the TOP244G. All functional parameters including topology, isolation, voltage rating, power output, switching frequency, duty cycle, protection features, and operating temperature range are identical. No circuit redesign is required.

Q: What is the difference between TOP244G and TOP244GN-TL packaging?

A: The TOP244G uses standard packaging, while TOP244GN-TL is supplied in Tape & Reel (TR) format. Both use the same SMD-8B package with 8-SMD (7 Leads) Gull Wing configuration. Tape & Reel format is standard for high-volume manufacturing and automated assembly processes.

Q: Does TOP244GN-TL require different handling procedures?

A: The TOP244GN-TL has an MSL rating of 4 (72 Hours), requiring moisture control after package opening. The TOP244G has an MSL rating of 1 (Unlimited), allowing unlimited exposure. Tape & Reel packages should be stored in dry conditions and used within 72 hours of opening. Standard moisture-control procedures for SMD components apply.

Q: Is RoHS compliance a functional difference?

A: No. RoHS compliance is a regulatory and material composition attribute, not a functional parameter. The TOP244GN-TL is RoHS Compliant, while the TOP244G is RoHS non-compliant. This distinction affects regulatory compliance for end applications but does not alter electrical or mechanical performance.

Q: Why is TOP244G classified as Obsolete?

A: Product status reflects manufacturer lifecycle decisions. The TOP244G is Obsolete, while TOP244GN-TL is Not For New Designs. For production continuity, the TOP244GN-TL provides equivalent functionality with extended availability.

Q: Are there other substitute parts available?

A: The TOP244GN-TL documentation references additional substitute parts (TOP246GN-TL, TOP245GN-TL, TOP242GN-TL, TOP243GN-TL, TOP254GN-TL). These parts belong to the same TOPSwitch®-GX series but have different power ratings and specifications. Direct substitution requires verification of all electrical and mechanical parameters against application requirements.

Q: What certifications apply to TOP244GN-TL?

A: The TOP244GN-TL carries REACH Unaffected status and ECCN classification EAR99. HTSUS code 8542.39.0001 applies for tariff classification. These certifications are identical to the TOP244G.