TOP214YN Equivalent & Substitute Parts Reference

Part Overview

The TOP214YN is an offline switching converter IC manufactured by Power Integrations, designed for isolated power supply applications supporting multiple topologies including Boost, Buck, Flyback, and Forward configurations. This device operates at 100kHz switching frequency with a maximum power rating of 125W and is housed in a TO-220-3 through-hole package.

The TOP214YN carries an Obsolete product status. Locating equivalent and substitute components is necessary for design continuity, production support, and long-term system reliability. Alternative models from the TOPSwitch® and TOPSwitch®-II series provide functional equivalence with varying power ratings and updated product designations.

Key Parameters

Parameter	TOP214YN Value
Manufacturer	Power Integrations
Category	Power Management (PMIC)
Series	TOPSwitch®
Package / Case	TO-220-3
Mounting Type	Through Hole
Voltage - Breakdown	700V
Topology	Boost, Buck, Flyback, Forward
Frequency - Switching	100kHz
Power (Watts)	125W
Duty Cycle	67%
Fault Protection	Current Limiting, Over Temperature
Output Isolation	Isolated
Operating Temperature	-40°C ~ 150°C (TJ)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TOP214YN is determined by the following critical parameters:

Primary Compatibility Criteria:

Package / Case: TO-220-3 (through-hole mounting)
Voltage - Breakdown: 700V
Topology Support: Boost, Buck, Flyback, Forward
Frequency - Switching: 100kHz
Duty Cycle: 67%
Output Isolation: Isolated
Operating Temperature Range: -40°C ~ 150°C (TJ)
Fault Protection: Current Limiting, Over Temperature minimum

Power Rating Flexibility: The TOP214YN operates at 125W. Substitute parts are grouped by power rating capability. Parts rated at or above 125W (TOP225YN at 100W, TOP226YN at 125W, TOP227YN at 150W) provide direct functional replacement. Parts rated below 125W (TOP221YN at 12W, TOP222YN at 25W, TOP223YN at 50W, TOP224YN at 75W) are suitable for applications requiring lower power output.

Series Consideration: The TOP214YN belongs to the original TOPSwitch® series (Obsolete). Equivalent substitutes from the TOPSwitch®-II series (TOP221YN through TOP227YN) maintain identical electrical and mechanical specifications while offering updated product status and RoHS compliance.

Package Exception: The TOP245YN operates in TO-220-7C package (6 leads) with Flyback-only topology and 66kHz-132kHz frequency range. This part is not a direct substitute due to package incompatibility and topology limitation, though it shares the 700V breakdown voltage and isolated output characteristics.

Parameter Comparison

Part Number	Series	Package	Power (W)	Frequency (kHz)	Topology	Voltage Breakdown (V)	Duty Cycle (%)	Product Status	RoHS Status
TOP214YN	TOPSwitch®	TO-220-3	125	100	Boost, Buck, Flyback, Forward	700	67	Obsolete	REACH Unaffected
TOP221YN	TOPSwitch®-II	TO-220-3	12	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP222YN	TOPSwitch®-II	TO-220-3	25	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP223YN	TOPSwitch®-II	TO-220-3	50	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP224YN	TOPSwitch®-II	TO-220-3	75	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP225YN	TOPSwitch®-II	TO-220-3	100	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP226YN	TOPSwitch®-II	TO-220-3	125	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP227YN	TOPSwitch®-II	TO-220-3	150	100	Boost, Buck, Flyback, Forward	700	67	Not For New Designs	RoHS Compliant
TOP245YN	TOPSwitch®-GX	TO-220-7C	85	66-132	Flyback	700	66.5	Not For New Designs	RoHS Compliant

Engineering Selection Recommendations

Direct Equivalent (Same Power Rating): TOP226YN is the primary equivalent for TOP214YN replacement. Both devices operate at 125W with identical electrical specifications (700V breakdown, 100kHz switching, 67% duty cycle, TO-220-3 package). TOP226YN carries RoHS Compliant status and Not For New Designs product status, providing regulatory compliance improvement over the Obsolete TOP214YN.

Higher Power Capability: TOP227YN (150W) provides functional substitution with increased power headroom. All electrical parameters remain identical except power rating. This selection is appropriate for applications requiring design margin or future power scaling.

Lower Power Applications: TOP225YN (100W), TOP224YN (75W), TOP223YN (50W), TOP222YN (25W), and TOP221YN (12W) are suitable for applications with reduced power requirements. Each maintains the same electrical architecture, package form factor, and operating characteristics as TOP214YN.

Not Recommended: TOP245YN is not suitable as a substitute. The TO-220-7C package is mechanically incompatible with TO-220-3 footprints. Additionally, TOP245YN supports only Flyback topology and operates at 66kHz-132kHz frequency range, limiting design flexibility compared to TOP214YN's multi-topology support at fixed 100kHz operation.

Compliance Consideration: All TOPSwitch®-II series substitutes (TOP221YN through TOP227YN) are RoHS Compliant, addressing regulatory requirements for new production and long-term supply chain sustainability compared to the Obsolete TOP214YN.

Frequently Asked Questions (FAQ)

Q: Can TOP226YN directly replace TOP214YN in existing designs?

A: TOP226YN is electrically and mechanically compatible with TOP214YN. Both devices share identical TO-220-3 package pinout, 700V breakdown voltage, 100kHz switching frequency, 67% duty cycle, and support for Boost, Buck, Flyback, and Forward topologies. No circuit modifications are required for substitution.

Q: What is the difference between TOP214YN and TOP225YN?

A: TOP225YN is rated at 100W compared to TOP214YN's 125W. All other electrical parameters are identical. TOP225YN is suitable for applications requiring up to 100W output. For designs requiring the full 125W capability, TOP226YN is the appropriate selection.

Q: Why is TOP245YN not a suitable substitute?

A: TOP245YN uses a TO-220-7C package (6 leads) incompatible with TOP214YN's TO-220-3 footprint. Additionally, TOP245YN supports only Flyback topology with 66kHz-132kHz frequency range, whereas TOP214YN supports multiple topologies at fixed 100kHz operation. PCB redesign would be required for TOP245YN implementation.

Q: Are all substitute parts RoHS compliant?

A: TOP221YN through TOP227YN are RoHS Compliant. TOP214YN carries REACH Unaffected status. TOP245YN is RoHS Compliant. Verify specific regulatory requirements for your application and supply chain.

Q: What is the inventory status of substitute parts?

A: TOP226YN (9,842 pcs), TOP227YN (10,400 pcs), and TOP225YN (8,475 pcs) have limited inventory. TOP222YN (56,400 pcs) and TOP224YN (39,300 pcs) have higher availability. Confirm current stock levels with your supplier before design finalization.

Q: Can I use a lower-power substitute like TOP223YN (50W) in a 125W application?

A: No. Using a lower-power rated device in a higher-power application will result in thermal stress, reduced efficiency, and potential device failure. Select a substitute rated at or above your application's power requirement.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts (TOP221YN through TOP227YN and TOP245YN) operate across -40°C to 150°C junction temperature, identical to TOP214YN. This range supports industrial and consumer applications without thermal derating concerns.

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