TOP244P Equivalent & Substitute Parts

Part Overview

The TOP244P is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-GX series. This device integrates a high-voltage power switch with control circuitry for isolated flyback topology power supplies, operating at 66kHz to 132kHz switching frequency with 28W power capability. The TOP244P is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support, maintenance, and component procurement.

Substiute Parts

TOP244P

Power IntegrationsIn Stock: 1280TOP244P Datasheet

Current PartRFQ

TOP244PN

Power IntegrationsIn Stock: 6252TOP244PN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP244P is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Topology: Flyback converter
• Output Isolation: Isolated
• Voltage - Breakdown: 700V
• Frequency - Switching: 66kHz ~ 132kHz
• Power (Watts): 28 W
• 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-DIP (0.300", 7.62mm), 7 Leads
• Mounting Type: Through Hole

The TOP244PN is identified as a direct manufacturer equivalent within the Power Integrations TOPSwitch®-GX series. This part maintains identical electrical specifications and mechanical packaging while differing in product status and RoHS compliance classification.

Parameter Comparison

Engineering Selection Recommendations

For Existing Systems Using TOP244P:

The TOP244PN serves as the direct functional equivalent for the obsolete TOP244P. Both parts maintain identical electrical and mechanical specifications across all critical parameters including topology, voltage rating, switching frequency, power capability, and thermal operating range. Pin-for-pin compatibility and package equivalence (8-DIP through-hole) enable direct substitution in existing PCB designs without layout modification.

Compliance Considerations:

The TOP244P carries RoHS non-compliant status, while the TOP244PN is RoHS Compliant. Selection between these parts depends on system-level compliance requirements. For applications subject to RoHS regulations or requiring compliant component documentation, the TOP244PN is the appropriate choice. For legacy systems or applications without RoHS mandates, either part satisfies functional requirements.

Product Status Impact:

The TOP244P is classified as Obsolete, indicating discontinued manufacturing and limited availability. The TOP244PN is classified as Not For New Designs, indicating restricted availability for new product development but continued support for existing applications. For ongoing procurement of replacement components, the TOP244PN represents the more reliable sourcing option with higher documented inventory levels (6164 units versus 1203 units).

Frequently Asked Questions (FAQ)

Q: Can TOP244PN be used as a direct replacement for TOP244P in existing designs?

A: Yes. The TOP244PN is electrically and mechanically equivalent to the TOP244P across all specified parameters. Both parts feature identical 700V breakdown voltage, 28W power rating, 66kHz to 132kHz switching frequency, 66.5% duty cycle, and 8-DIP through-hole packaging. Pin-for-pin compatibility permits direct substitution without PCB redesign.

Q: What is the difference between TOP244P and TOP244PN?

A: The primary differences are product status and RoHS compliance. TOP244P is classified as Obsolete with RoHS non-compliant status. TOP244PN is classified as Not For New Designs with RoHS Compliant status. Electrical and mechanical specifications are identical.

Q: Which part should be selected for new system designs?

A: Neither part is recommended for new designs. TOP244P is Obsolete and TOP244PN is classified as Not For New Designs. For new product development, consult Power Integrations current product portfolio for active TOPSwitch®-GX series alternatives.

Q: Are there packaging differences between TOP244P and TOP244PN?

A: Both parts use 8-DIP (0.300", 7.62mm) through-hole packaging with 7 leads. The TOP244PN is supplied in Tube packaging, while TOP244P packaging specification is not provided. This difference does not affect electrical compatibility or PCB mounting.

Q: What fault protection features are included in these parts?

A: Both TOP244P and TOP244PN include Current Limiting, Over Temperature, and Over Voltage protection. Frequency Control is implemented as the primary control feature.

Q: What is the operating temperature range for these devices?

A: Both parts operate across -40°C to 150°C junction temperature (TJ) range, suitable for industrial and extended-temperature applications.