CS1611A-FSZR LED Driver IC Equivalent & Substitute Parts

Part Overview

The CS1611A-FSZR is an AC DC offline switcher LED driver IC manufactured by Cirrus Logic Inc., designed for lighting applications with Triac dimming capability. This part operates in the 11V to 17V supply voltage range and features a Flyback topology with a single output in a 16-SOIC surface mount package. The CS1611A-FSZR is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the offline switcher architecture, Triac dimming functionality, and lighting application requirements while accommodating modern active product alternatives.

Substiute Parts

CS1611A-FSZR

Cirrus Logic Inc.In Stock: 1138CS1611A-FSZR Datasheet

Current PartRFQ

LNK415EG

Power IntegrationsIn Stock: 16937LNK415EG Datasheet

MFR RecommendedRFQ

MP4088GJ-P

Monolithic Power Systems Inc.In Stock: 1126MP4088GJ-P Datasheet

MFR RecommendedRFQ

NCL30060BDR2G

onsemiIn Stock: 7627NCL30060BDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CS1611A-FSZR is determined by the following critical parameters: AC DC offline switcher topology, single output configuration, Triac dimming capability, lighting application suitability, and surface mount packaging. The three qualified substitute parts are grouped based on their ability to fulfill these core functional requirements:

LNK415EG (Power Integrations): Active product with Flyback topology, PWM dimming, internal switch, and extended supply voltage range (36V–725V). Represents a modern alternative with enhanced integration and higher frequency operation (66kHz).

MP4088GJ-P (Monolithic Power Systems Inc.): Active product with Buck/Boost topology, Triac dimming, internal switch, and compact TSOT-23-5 surface mount package. Operates at lower supply voltage (4.5V–5V) with 22kHz frequency.

NCL30060BDR2G (onsemi): Active product with Flyback/Step-Down topology, 7-SOIC surface mount package, and supply voltage range of 8.8V–28V. No internal switch configuration.

All substitute parts maintain AC DC offline switcher classification, single output architecture, and lighting application focus. Substitution compatibility depends on circuit topology tolerance, dimming method requirements, and package footprint constraints in the target application.

Parameter Comparison

Engineering Selection Recommendations

LNK415EG Selection: Suitable for designs requiring Flyback topology with PWM dimming capability. This part is an active product with RoHS compliance and superior moisture sensitivity rating (MSL 1). The through-hole package requires PCB layout modification from the original 16-SOIC footprint. Extended supply voltage range (36V–725V) accommodates wider input specifications. Higher operating temperature range (-40°C to 150°C) provides thermal margin advantage.

MP4088GJ-P Selection: Appropriate for applications where Triac dimming compatibility is mandatory and compact surface mount packaging is required. This part maintains the same dimming method as the original CS1611A-FSZR. ROHS3 compliance and MSL 1 rating ensure modern manufacturing standards. The TSOT-23-5 package is significantly smaller than the 16-SOIC, reducing PCB area. Supply voltage range (4.5V–5V) is narrower than the original part and requires circuit validation.

NCL30060BDR2G Selection: Optimal for designs where Flyback/Buck topology flexibility is acceptable and surface mount 7-SOIC packaging is compatible. This part is an active product with ROHS3 compliance and MSL 1 rating. Supply voltage range (8.8V–28V) overlaps with the original CS1611A-FSZR specification. Operating temperature maximum (105°C) is lower than the original part and requires thermal analysis for high-temperature applications. No dimming specification requires circuit-level evaluation.

All three substitute parts are active products with superior moisture sensitivity ratings and modern compliance certifications compared to the obsolete CS1611A-FSZR.

Frequently Asked Questions (FAQ)

Q: Can LNK415EG directly replace CS1611A-FSZR in existing designs?

A: LNK415EG maintains Flyback topology and lighting application focus but differs in package type (through-hole vs. surface mount), dimming method (PWM vs. Triac), and supply voltage range (36V–725V vs. 11V–17V). PCB layout redesign and circuit validation are required.

Q: Which substitute part best preserves Triac dimming functionality?

A: MP4088GJ-P maintains Triac dimming capability identical to CS1611A-FSZR. This part is the most direct functional equivalent for applications where Triac dimming is a system requirement.

Q: What are the package footprint differences among substitute parts?

A: CS1611A-FSZR uses 16-SOIC surface mount. LNK415EG uses 7-SSIP through-hole with formed leads. MP4088GJ-P uses compact TSOT-23-5 surface mount. NCL30060BDR2G uses 7-SOIC surface mount. Package selection depends on PCB layout constraints and manufacturing capabilities.

Q: Are all substitute parts RoHS compliant?

A: Yes. LNK415EG is RoHS Compliant. MP4088GJ-P and NCL30060BDR2G are both ROHS3 Compliant. The original CS1611A-FSZR RoHS status is not specified.

Q: What is the moisture sensitivity impact of substitution?

A: CS1611A-FSZR has MSL 3 (168 Hours). All three substitute parts have MSL 1 (Unlimited), indicating superior moisture resistance and reduced handling constraints during manufacturing and storage.

Q: Which substitute part operates at the lowest supply voltage?

A: MP4088GJ-P operates at 4.5V minimum supply voltage, the lowest among all parts. This part is suitable only for applications with 4.5V–5V input specifications.

Q: Can NCL30060BDR2G be used in high-temperature applications?

A: NCL30060BDR2G maximum operating temperature is 105°C (TJ), lower than CS1611A-FSZR (125°C) and LNK415EG (150°C). Applications requiring sustained operation above 105°C require thermal analysis or alternative part selection.