TOP232GN-TL Equivalent & Substitute Parts

Part Overview

The TOP232GN-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-FX series. This device integrates a high-voltage power switch with integrated protection and control circuitry for isolated flyback topology applications. The TOP232GN-TL is classified as Obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The device delivers 15 W output power with 700 V breakdown voltage rating and operates across the -40°C to 150°C temperature range.

Substiute Parts

TOP232GN-TL

Power IntegrationsIn Stock: 2085TOP232GN-TL Datasheet

Current PartRFQ

TOP252GN-TL

Power IntegrationsIn Stock: 3091TOP252GN-TL Datasheet

MFR RecommendedRFQ

TOP233GN-TL

Power IntegrationsIn Stock: 2916TOP233GN-TL Datasheet

Parametric EquivalentRFQ

TOP234GN-TL

Power IntegrationsIn Stock: 2153TOP234GN-TL Datasheet

Parametric EquivalentRFQ

TOP242GN-TL

Power IntegrationsIn Stock: 23383TOP242GN-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOP232GN-TL is determined by the following critical parameters that must remain compatible:

Mandatory Compatibility Parameters:

• Topology: Flyback (isolated converter)
• Package / Case: 8-SMD (7 Leads), Gull Wing
• Voltage - Breakdown: 700 V
• Output Isolation: Isolated
• Internal Switch(s): Yes
• Fault Protection: Current Limiting, Over Temperature, Over Voltage
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Mounting Type: Surface Mount
• RoHS Status: RoHS Compliant

Power Output Consideration: The TOP232GN-TL delivers 15 W. Substitute parts are grouped by power rating: direct equivalents maintain 15 W output, while higher-power variants (25 W, 30 W) serve as parametric equivalents for designs requiring increased power capacity within the same topology and package constraints.

Switching Frequency: The TOP232GN-TL operates at 66 kHz ~ 132 kHz. Substitute TOP252GN-TL operates at fixed 66 kHz, representing a narrower frequency range. Other substitutes maintain the 66 kHz ~ 132 kHz range.

Series Designation: TOP232GN-TL belongs to TOPSwitch®-FX series (Obsolete). TOP252GN-TL belongs to TOPSwitch®-HX series (Active). TOP233GN-TL, TOP234GN-TL, and TOP242GN-TL remain within TOPSwitch®-FX or TOPSwitch®-GX families.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Power Rating):

TOP252GN-TL is the primary recommended substitute for TOP232GN-TL. Both devices deliver 15 W output power, maintain 700 V breakdown voltage, and support isolated flyback topology in identical 8-SMD (7 Leads) Gull Wing packages. TOP252GN-TL is classified as Active product status, ensuring ongoing availability and manufacturing support. The switching frequency of TOP252GN-TL is fixed at 66 kHz, compared to the TOP232GN-TL's 66 kHz ~ 132 kHz range. TOP252GN-TL belongs to the TOPSwitch®-HX series and uses SMD-8C supplier device package versus SMD-8B, representing a newer generation with enhanced reliability characteristics.

TOP242GN-TL provides an alternative direct equivalent at 15 W power output. This device is classified as Not For New Designs but remains available with substantial inventory (23,300 pcs). TOP242GN-TL belongs to the TOPSwitch®-GX series and maintains the 66 kHz ~ 132 kHz switching frequency range. The duty cycle differs at 66.5% versus 78%, which may affect transformer design parameters.

Parametric Equivalents (Higher Power Ratings):

TOP233GN-TL and TOP234GN-TL serve as parametric equivalents for applications requiring increased power capacity. TOP233GN-TL delivers 25 W output, while TOP234GN-TL delivers 30 W output. Both maintain the TOPSwitch®-FX series designation, 700 V breakdown voltage, 66 kHz ~ 132 kHz switching frequency, and 78% duty cycle. These devices are suitable for designs where the original 15 W specification can be upgraded within the same topology and package constraints.

Compliance and Certification:

All substitute parts maintain RoHS Compliance, REACH Unaffected status, and identical operating temperature range (-40°C ~ 150°C). All devices carry ECCN EAR99 and HTSUS 8542.39.0001 classifications. Moisture Sensitivity Level (MSL) is 4 (72 Hours) across all variants.

Frequently Asked Questions (FAQ)

Q: Can TOP252GN-TL directly replace TOP232GN-TL in existing designs?

A: TOP252GN-TL is electrically compatible as a direct 15 W equivalent. Both devices support isolated flyback topology, 700 V breakdown voltage, and identical operating temperature range. The primary difference is the switching frequency: TOP252GN-TL operates at fixed 66 kHz, while TOP232GN-TL operates across 66 kHz ~ 132 kHz. Designs utilizing the full frequency range may require transformer optimization. TOP252GN-TL uses SMD-8C supplier device package versus SMD-8B, but both are 8-SMD (7 Leads) Gull Wing packages with identical pinout compatibility.

Q: What is the difference between TOP233GN-TL and TOP234GN-TL?

A: TOP233GN-TL delivers 25 W output power, while TOP234GN-TL delivers 30 W output power. Both maintain identical topology, voltage ratings, switching frequency range (66 kHz ~ 132 kHz), duty cycle (78%), and package specifications. Selection between these parametric equivalents depends on the required power capacity for the application. Both are classified as Obsolete but remain available in inventory.

Q: Why is TOP232GN-TL classified as Obsolete?

A: TOP232GN-TL is an older generation device within the TOPSwitch®-FX series. Power Integrations has transitioned to newer series such as TOPSwitch®-HX (represented by TOP252GN-TL) and TOPSwitch®-GX. Obsolete classification indicates the device is no longer in active production, though existing inventory remains available. For new designs, TOP252GN-TL (Active status) is the recommended alternative.

Q: Are all substitute parts pin-compatible with TOP232GN-TL?

A: All substitute parts maintain the 8-SMD (7 Leads) Gull Wing package configuration with identical pinout. However, supplier device packages differ: TOP232GN-TL, TOP233GN-TL, TOP234GN-TL, and TOP242GN-TL use SMD-8B, while TOP252GN-TL uses SMD-8C. These package designations reflect internal construction differences but do not affect PCB footprint or lead positioning. Direct PCB substitution is supported.

Q: What are the packaging options available for substitute parts?

A: TOP252GN-TL is supplied in Tape & Reel (TR) format. TOP233GN-TL and TOP234GN-TL are supplied in Cut Tape (CT) format. TOP242GN-TL is supplied in Cut Tape (CT) format. TOP232GN-TL original packaging is not specified in the provided data. Packaging selection depends on production volume and assembly requirements.

Q: Can TOP233GN-TL or TOP234GN-TL be used in a 15 W design?

A: TOP233GN-TL (25 W) and TOP234GN-TL (30 W) are rated for higher power output than the original TOP232GN-TL (15 W). These devices can operate in 15 W applications, as power rating represents maximum capability. However, transformer design, feedback network, and thermal management may require optimization to accommodate the different power class. These are classified as parametric equivalents rather than direct replacements.

Q: What is the inventory status of substitute parts?

A: TOP252GN-TL has 3,024 pcs in stock (Active status). TOP233GN-TL has 2,889 pcs in stock (Obsolete status). TOP234GN-TL has 2,100 pcs in stock (Obsolete status). TOP242GN-TL has 23,300 pcs in stock (Not For New Designs status). TOP232GN-TL has 2,055 pcs in stock (Obsolete status). Inventory availability should be verified with the supplier for production commitments.

Q: Do all substitute parts support Frequency Control?

A: TOP232GN-TL, TOP233GN-TL, TOP234GN-TL, and TOP242GN-TL all include Frequency Control as a control feature. TOP252GN-TL does not list Frequency Control in the provided specifications. This difference may affect design flexibility in applications requiring dynamic frequency adjustment.