LYT2004E Equivalent & Substitute Parts Reference

Part Overview

The LYT2004E is an offline switch flyback converter IC manufactured by Power Integrations, operating at 85kHz with 10W power output capability. This integrated circuit is designed for isolated power supply applications utilizing flyback topology with an internal power switch. The device is classified as Active product status with RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when design requirements necessitate alternative packaging formats, different mounting technologies, or when primary component availability is constrained. Substitution eligibility is determined by matching topology classification, isolation characteristics, and operational voltage parameters within specified ranges.

Key Parameters

Parameter	LYT2004E Value	Specification Basis
Topology	Flyback	Core converter architecture
Output Isolation	Isolated	Galvanic isolation requirement
Internal Switch(s)	Yes	Integrated power switch presence
Voltage - Breakdown	725V	Maximum voltage rating
Frequency - Switching	85kHz	Operating frequency
Power (Watts)	10W	Output power capacity
Operating Temperature	-40°C ~ 150°C (TJ)	Junction temperature range
Package / Case	7-SSIP, 6 Leads, Exposed Pad	Physical form factor
Mounting Type	Through Hole	PCB assembly method
RoHS Status	RoHS Compliant	Environmental compliance

Substitute Part Grouping Explanation

Substitute parts for the LYT2004E are classified based on the following substitution criteria:

Primary Matching Parameters:

Topology: Flyback converter architecture
Output Isolation: Isolated power delivery
Type: AC DC Offline Switcher classification
Product Status: Active manufacturing status
RoHS Compliance: ROHS3 or equivalent compliance level

Secondary Compatibility Factors:

Voltage Supply Range: Overlap with LYT2004E operational envelope
Internal Switch Configuration: Presence or absence of integrated switching element
Mounting Technology: Surface mount alternatives to through-hole configuration
Operating Temperature Range: Minimum -40°C lower bound requirement
Package Classification: SOIC, SOT-23, or equivalent form factors

The identified substitute parts operate within flyback topology classification and maintain isolated output characteristics. However, substitutes differ in mounting methodology (surface mount versus through hole), package density, and specific voltage supply specifications. These differences require circuit design adaptation and PCB layout modification.

Parameter Comparison

Parameter	LYT2004E	TPS92315DBVT	MP4026GJ-P	NCL30088DDR2G	TPS92010DR	TPS92075D/NOPB	NCL30030B2DR2G
Topology	Flyback	Flyback	Flyback	Flyback	Flyback	Buck/Boost	Flyback
Output Isolation	Isolated	Isolated	Isolated	Isolated	Isolated	Isolated	Isolated
Type	Offline Switch	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher
Internal Switch(s)	Yes	No	No	No	Yes	No	No
Voltage - Supply (Min)	-	9V	9.8V	8.8V	-	11V	9V
Voltage - Supply (Max)	-	35V	27V	20V	21V	18V	30V
Frequency - Switching	85kHz	130kHz	-	-	-	-	-
Operating Temperature (Min)	-40°C	-20°C	-	-40°C	-40°C	-40°C	-40°C
Operating Temperature (Max)	150°C	125°C	125°C	125°C	105°C	125°C	125°C
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	7-SSIP, 6 Leads	SOT-23-6	TSOT-23-6	8-SOIC	8-SOIC	8-SOIC	16-SOIC
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Compliance and Certification Basis:

All identified substitute parts maintain Active product status with ROHS3 compliance certification, ensuring continued availability and regulatory alignment with environmental standards. The LYT2004E itself carries RoHS compliance with EAR99 export classification and REACH unaffected status, matching the compliance profile of all substitute candidates.

Substitution Feasibility Assessment:

TPS92315DBVT (Texas Instruments): Maintains flyback topology with isolated output and AC DC offline switcher classification. Operates within 9V to 35V supply range with 130kHz switching frequency. Surface mount SOT-23-6 package requires PCB redesign. Operating temperature maximum of 125°C is lower than LYT2004E specification of 150°C. Suitable for applications not requiring extended temperature operation above 125°C.

MP4026GJ-P (Monolithic Power Systems): Flyback topology LED driver with isolated output. Supply range 9.8V to 27V. TSOT-23-6 surface mount package. No internal switch. Suitable for lighting applications with moderate power requirements. Temperature rating to 125°C.

NCL30088DDR2G (onsemi): Flyback topology with 8.8V to 20V supply range. 8-SOIC surface mount package. Operating temperature -40°C to 125°C. Moisture sensitivity level 3 (168 hours) versus LYT2004E level 1 (unlimited). Restricted supply voltage range compared to LYT2004E 725V breakdown rating.

TPS92010DR (Texas Instruments): Flyback topology with internal switch (matching LYT2004E architecture). 1A output current specification. 8-SOIC surface mount package. Supply maximum 21V. Operating temperature -40°C to 105°C. Lower temperature maximum than LYT2004E.

TPS92075D/NOPB (Texas Instruments): Buck/Boost topology differs from LYT2004E flyback architecture. 11V to 18V supply range. 8-SOIC surface mount. Triac dimming capability. Operating temperature -40°C to 125°C. Topology difference requires significant circuit redesign.

NCL30030B2DR2G (onsemi): Flyback topology with 9V to 30V supply range. 16-SOIC surface mount package. Operating temperature -40°C to 125°C. Larger package footprint. Suitable for lighting and signage applications.

Frequently Asked Questions (FAQ)

Q: Can LYT2004E be directly replaced with surface mount alternatives without circuit modification?

A: No. The LYT2004E utilizes through-hole 7-SSIP packaging, while all identified substitutes employ surface mount technology (SOT-23-6, TSOT-23-6, or SOIC packages). PCB layout redesign and assembly process modification are required.

Q: What is the primary topology matching criterion for substitution?

A: Flyback converter topology is the primary matching criterion. The LYT2004E operates as an offline switch flyback converter. Substitute parts must maintain flyback topology classification. TPS92075D/NOPB utilizes Buck/Boost topology and represents a topology deviation requiring significant circuit redesign.

Q: How do internal switch characteristics affect substitution eligibility?

A: The LYT2004E contains an internal integrated power switch. TPS92010DR also includes an internal switch, providing architectural similarity. Substitute parts without internal switches (TPS92315DBVT, MP4026GJ-P, NCL30088DDR2G, TPS92075D/NOPB, NCL30030B2DR2G) require external switching element implementation, increasing component count and circuit complexity.

Q: What voltage supply range limitations apply to substitutes?

A: The LYT2004E specifies 725V breakdown voltage for offline operation. Substitute parts specify lower maximum supply voltages: TPS92315DBVT (35V), MP4026GJ-P (27V), NCL30088DDR2G (20V), TPS92010DR (21V), TPS92075D/NOPB (18V), NCL30030B2DR2G (30V). These represent secondary-side or controller supply specifications, not primary voltage ratings. Application circuit design must accommodate these specifications.

Q: Are operating temperature ranges compatible across all substitutes?

A: No. The LYT2004E operates -40°C to 150°C (TJ). Substitute parts maximum temperatures range from 105°C to 125°C. TPS92010DR (105°C maximum) and TPS92315DBVT (-20°C minimum) present the most restrictive temperature boundaries. Applications requiring full -40°C to 150°C operation cannot use these substitutes.

Q: What packaging considerations apply to substitution?

A: LYT2004E uses 7-SSIP through-hole package with 6 leads and exposed pad. Substitutes employ: SOT-23-6 (TPS92315DBVT, MP4026GJ-P), 8-SOIC (NCL30088DDR2G, TPS92010DR, TPS92075D/NOPB), or 16-SOIC (NCL30030B2DR2G). Package selection affects PCB real estate, thermal management, and assembly compatibility.

Q: How does moisture sensitivity level affect long-term reliability?

A: LYT2004E carries MSL 1 (unlimited shelf life). NCL30088DDR2G specifies MSL 3 (168-hour limit), requiring controlled storage and handling procedures. TPS92315DBVT specifies MSL 2 (1-year limit). Extended storage or humid environment exposure may compromise component reliability for MSL 3 and MSL 2 rated parts.

Q: Can substitutes be used in applications requiring isolated output?

A: Yes. All identified substitute parts maintain isolated output classification matching LYT2004E isolation requirement. Galvanic isolation is preserved across all substitution candidates.

Q: What is the significance of switching frequency differences?

A: LYT2004E operates at 85kHz. TPS92315DBVT operates at 130kHz. Switching frequency affects transformer design, EMI characteristics, and component selection. Higher frequency enables smaller transformer and filter components but increases switching losses. Circuit design must accommodate frequency-dependent transformer specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message