CS1616-FZZR LED Driver IC Equivalent & Substitute Parts

Part Overview

The CS1616-FZZR is an LED Driver IC manufactured by Cirrus Logic Inc., designed for AC/DC offline switching applications with Triac dimming capability. This component integrates a single output converter supporting Flyback, Step-Down (Buck), and Step-Up (Boost) topologies for lighting applications. The part is currently classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The device operates across a supply voltage range of 11V to 17V with a frequency range of 6kHz to 200kHz, housed in a 16-TSSOP surface mount package.

Substiute Parts

CS1616-FZZR

Cirrus Logic Inc.In Stock: 3843CS1616-FZZR Datasheet

Current PartRFQ

AL6562AS-13

Diodes IncorporatedIn Stock: 63141AL6562AS-13 Datasheet

MFR RecommendedRFQ

LNK419EG

Power IntegrationsIn Stock: 35989LNK419EG Datasheet

MFR RecommendedRFQ

LYT2004K-TL

Power IntegrationsIn Stock: 4456LYT2004K-TL Datasheet

MFR RecommendedRFQ

MP4050GS

Monolithic Power Systems Inc.In Stock: 1336MP4050GS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS1616-FZZR requires matching on the following critical parameters:

• Application Domain: All substitutes must support LED driver functionality for AC/DC offline switching in lighting applications
• Topology Compatibility: Substitutes must support at least one of the topologies present in the original part (Flyback, Buck, or Boost)
• Number of Outputs: Single output requirement must be maintained
• Mounting Type: Surface mount compatibility is required for PCB integration
• Operating Temperature Range: Minimum -40°C to 125°C junction temperature support
• Supply Voltage Compatibility: Input voltage specifications must overlap with or exceed the 11V to 17V range

The substitute parts identified below meet these criteria while offering active product status and improved availability compared to the obsolete CS1616-FZZR.

Parameter Comparison

Engineering Selection Recommendations

AL6562AS-13 (Diodes Incorporated): This substitute offers active product status with improved MSL rating (1 vs. 3) and extended operating temperature range (-40°C to 150°C). The device supports Step-Up (Boost) topology with supply voltage range of 10.3V to 22V, overlapping the original specification. Surface mount 8-SOIC packaging provides compact integration. ROHS3 compliance and unlimited moisture sensitivity support long-term reliability.

LNK419EG (Power Integrations): This LinkSwitch®-PH series device provides active status with Flyback topology matching the original part's capabilities. The device features internal switching capability and PWM dimming support. Extended supply voltage range (36V to 725V) accommodates broader input specifications. Through-hole mounting requires PCB redesign consideration. RoHS compliance and unlimited MSL rating ensure regulatory compliance and storage flexibility.

LYT2004K-TL (Power Integrations): This LYTSwitch™-2 series converter offers active product status with Flyback topology and integrated internal switching. The device operates at 85kHz switching frequency with 55% duty cycle and 10W power rating. Surface mount 12-BESOP packaging with exposed pad supports thermal management. RoHS compliance and unlimited MSL rating provide regulatory and storage advantages.

MP4050GS (Monolithic Power Systems Inc.): This substitute provides active product status with Step-Down (Buck) topology and internal switching capability. The device operates across 85VAC to 265VAC input range, suitable for direct AC line applications. Surface mount 8-SOIC packaging maintains compact form factor. ROHS3 compliance and MSL-2 rating support production environments with standard moisture control.

Frequently Asked Questions (FAQ)

Q: Can the AL6562AS-13 directly replace the CS1616-FZZR in existing designs?

A: The AL6562AS-13 supports the same single-output, AC/DC offline switching architecture for lighting applications. However, the topology difference (Boost vs. multi-topology original) and package change (8-SOIC vs. 16-TSSOP) require circuit evaluation and PCB layout modification. Supply voltage range compatibility (10.3V to 22V overlaps 11V to 17V) supports functional substitution with design verification.

Q: What are the mounting considerations when switching from CS1616-FZZR to LNK419EG?

A: The LNK419EG uses through-hole 7-SSIP packaging with formed leads, whereas the CS1616-FZZR is surface mount 16-TSSOP. This substitution requires PCB redesign to accommodate through-hole mounting. The LNK419EG's higher supply voltage range (36V to 725V) and internal switching capability may simplify circuit design but necessitate complete schematic and layout review.

Q: Which substitute offers the best compliance profile for new production?

A: LYT2004K-TL and LNK419EG both provide RoHS compliance and unlimited MSL ratings (1), superior to the original CS1616-FZZR's MSL-3 specification. AL6562AS-13 and MP4050GS offer ROHS3 compliance with MSL ratings of 1 and 2 respectively. All substitutes support -40°C to 150°C operating temperature, exceeding the original -40°C to 125°C range.

Q: Are there topology limitations when selecting a substitute?

A: Yes. The original CS1616-FZZR supports Flyback, Buck, and Boost topologies. Individual substitutes support specific topologies: AL6562AS-13 (Boost only), LNK419EG (Flyback), LYT2004K-TL (Flyback), and MP4050GS (Buck only). Design requirements must align with the selected substitute's topology to ensure functional compatibility.

Q: What is the impact of package size differences on circuit design?

A: Package changes affect PCB layout, thermal management, and component density. The 16-TSSOP original provides 16 leads; substitutes range from 8-SOIC (AL6562AS-13, MP4050GS) to 12-BESOP (LYT2004K-TL) to 7-SSIP (LNK419EG). Smaller packages reduce board area but may concentrate thermal dissipation. Larger packages with exposed pads (LYT2004K-TL, LNK419EG) improve thermal performance. Pin count and function mapping require detailed datasheet cross-reference.