TOP233GN-TL Equivalent & Substitute Parts

Part Overview

The TOP233GN-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the TOPSwitch®-FX series. This device integrates a 700V breakdown voltage power switch with integrated control circuitry for isolated flyback topology applications, delivering 25W power output. The TOP233GN-TL operates at switching frequencies between 66kHz and 132kHz with frequency control capability and comprehensive fault protection including current limiting, over-temperature, and over-voltage protection.

The TOP233GN-TL carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this component.

Substiute Parts

TOP233GN-TL

Power IntegrationsIn Stock: 2916TOP233GN-TL Datasheet

Current PartRFQ

TOP253GN-TL

Power IntegrationsIn Stock: 6398TOP253GN-TL Datasheet

MFR RecommendedRFQ

TOP234GN-TL

Power IntegrationsIn Stock: 2153TOP234GN-TL Datasheet

Parametric EquivalentRFQ

TOP243GN-TL

Power IntegrationsIn Stock: 18359TOP243GN-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TOP233GN-TL is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

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

Secondary Compatibility Parameters:

• Power Output: 25W (exact match preferred; higher ratings acceptable for design margin)
• Switching Frequency: 66kHz ~ 132kHz range (exact match or compatible range)
• Duty Cycle: 78% (reference parameter)
• RoHS Compliance: Required
• MSL Rating: 4 (72 Hours)

The substitute parts identified below meet these criteria with variations noted in series designation, product status, and specific frequency or power characteristics.

Parameter Comparison

Engineering Selection Recommendations

TOP253GN-TL (MFR Recommended Substitute)

The TOP253GN-TL is the manufacturer-recommended substitute for the TOP233GN-TL. This device carries Active product status, ensuring long-term availability and continued manufacturer support. The TOP253GN-TL belongs to the TOPSwitch®-HX series and maintains electrical equivalence across all critical parameters: 700V breakdown voltage, 25W power output, isolated flyback topology, and comprehensive fault protection. The switching frequency is fixed at 66kHz (compared to the TOP233GN-TL's 66kHz ~ 132kHz range). The TOP253GN-TL is supplied in Tape & Reel format with SMD-8C package designation. This substitute is suitable for new production and long-term supply chain continuity.

TOP234GN-TL (Parametric Equivalent)

The TOP234GN-TL provides parametric equivalence with the TOP233GN-TL within the TOPSwitch®-FX series. Both devices share identical topology, 700V breakdown voltage, frequency control capability, and switching frequency range (66kHz ~ 132kHz). The TOP234GN-TL delivers 30W power output compared to the TOP233GN-TL's 25W, providing additional design margin. The TOP234GN-TL carries Obsolete product status. This substitute is applicable for designs requiring higher power capacity within the same series architecture.

TOP243GN-TL (Parametric Equivalent)

The TOP243GN-TL offers parametric equivalence with the TOP233GN-TL across core electrical specifications: 700V breakdown voltage, 25W power output, isolated flyback topology, and switching frequency range (66kHz ~ 132kHz). The TOP243GN-TL belongs to the TOPSwitch®-GX series with a duty cycle of 66.5% (compared to TOP233GN-TL's 78%). The TOP243GN-TL carries Not For New Designs product status. This substitute is applicable for existing production support only.

All substitute parts maintain RoHS compliance, MSL rating of 4 (72 Hours), and operating temperature range of -40°C ~ 150°C (TJ), ensuring compatibility with existing design requirements and regulatory obligations.

Frequently Asked Questions (FAQ)

Q: Can the TOP253GN-TL directly replace the TOP233GN-TL in existing designs?

A: The TOP253GN-TL is the manufacturer-recommended substitute and maintains electrical equivalence across all critical parameters. The primary difference is fixed switching frequency at 66kHz versus the TOP233GN-TL's variable 66kHz ~ 132kHz range. Designs utilizing fixed 66kHz operation require no modification. Designs dependent on frequency control capability above 66kHz require circuit evaluation.

Q: What is the difference between SMD-8B and SMD-8C package designations?

A: SMD-8B and SMD-8C are supplier device package designations for the same 8-SMD (7 Leads), Gull Wing physical package. Both are compatible with identical PCB footprints and mounting processes. The designation difference reflects internal supplier packaging specifications and does not affect electrical performance or mechanical compatibility.

Q: Why does the TOP234GN-TL have higher power output (30W) than the TOP233GN-TL (25W)?

A: The TOP234GN-TL is rated for 30W maximum power output, providing additional design margin compared to the TOP233GN-TL's 25W rating. Both devices share identical topology, voltage ratings, and frequency control capability. The higher power rating reflects enhanced thermal or current handling characteristics within the same package and series.

Q: Is the TOP243GN-TL suitable for new product designs?

A: The TOP243GN-TL carries Not For New Designs product status. This device is suitable only for supporting existing production of designs already utilizing this component. New designs should utilize the TOP253GN-TL (Active status) or evaluate alternative current-generation devices from Power Integrations.

Q: What is the significance of the duty cycle difference between TOP233GN-TL (78%) and TOP243GN-TL (66.5%)?

A: Duty cycle is a reference parameter indicating the internal control characteristics of each device. The difference reflects distinct design approaches within different series (TOPSwitch®-FX versus TOPSwitch®-GX). Both devices maintain the same 700V breakdown voltage, isolated flyback topology, and fault protection features. Duty cycle differences do not prevent substitution but reflect series-specific control architecture.

Q: Are all substitute parts RoHS compliant?

A: Yes. The TOP233GN-TL and all identified substitute parts (TOP253GN-TL, TOP234GN-TL, TOP243GN-TL) carry RoHS Compliant status and maintain MSL rating of 4 (72 Hours), ensuring compatibility with current environmental and regulatory requirements.

Q: What packaging formats are available for each substitute?

A: TOP233GN-TL is supplied in Cut Tape (CT) format. TOP253GN-TL is supplied in Tape & Reel (TR) format. TOP234GN-TL and TOP243GN-TL are supplied in Cut Tape (CT) & Digi-Reel® formats. Packaging format selection depends on production volume and procurement requirements; electrical and mechanical compatibility remains unchanged across all formats.