CS168002-FZZ Equivalent & Substitute Parts

Part Overview

The CS168002-FZZ is an LED Driver IC manufactured by Cirrus Logic Inc., designed for AC DC offline switching applications with triac dimming capability. This device operates in the 11V to 17V supply range and supports both step-down (buck) and step-up (boost) topologies. The product is currently obsolete, making identification of functionally equivalent substitute components essential for ongoing design support, legacy system maintenance, and production continuity.

Substiute Parts

CS168002-FZZ

Cirrus Logic Inc.In Stock: 864CS168002-FZZ Datasheet

Current PartRFQ

MP4050AGS-Z

Monolithic Power Systems Inc.In Stock: 3895MP4050AGS-Z Datasheet

MFR RecommendedRFQ

MP4068GS-Z

Monolithic Power Systems Inc.In Stock: 276717MP4068GS-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CS168002-FZZ is determined by the following critical parameters:

• AC DC Offline Switcher Type: Both substitute parts maintain this core functionality
• Triac Dimming Capability: MP4068GS-Z provides triac dimming; MP4050AGS-Z does not
• Topology Support: MP4068GS-Z supports both buck and boost topologies matching the original; MP4050AGS-Z supports buck topology only
• Supply Voltage Range: Substitutes operate at 4.1V to 5V, differing from the original 11V to 17V range
• Package Form Factor: Both substitutes use 8-SOIC packaging versus the original 16-TSSOP
• Product Status: Both substitute parts are active products with current manufacturing support
• Operating Temperature Range: Both maintain -40°C to 125°C compatibility
• Compliance & Certifications: Both are ROHS3 compliant and REACH unaffected

MP4068GS-Z is the primary substitute when triac dimming and dual topology support are required. MP4050AGS-Z serves applications requiring only buck topology without triac dimming.

Parameter Comparison

Engineering Selection Recommendations

MP4068GS-Z is the recommended primary substitute for CS168002-FZZ applications. This part maintains active product status with current manufacturing support, provides triac dimming functionality identical to the original, and supports both buck and boost topologies. The device is ROHS3 compliant and carries REACH unaffected status. Supply voltage and frequency parameters differ from the original specification and require circuit redesign evaluation.

MP4050AGS-Z is suitable for applications requiring only buck topology operation without triac dimming requirements. This part is also active with current availability, ROHS3 compliant, and REACH unaffected. Automotive grade qualification is available for this device. Like MP4068GS-Z, supply voltage and frequency parameters require design consideration.

Both substitutes require PCB layout modification due to package change from 16-TSSOP to 8-SOIC form factor. Circuit topology and power supply design must be re-evaluated to accommodate the different supply voltage ranges and switching frequencies.

Frequently Asked Questions (FAQ)

Q: Can MP4068GS-Z directly replace CS168002-FZZ without circuit modification?

A: No. While MP4068GS-Z maintains the same AC DC offline switcher type and triac dimming capability, the supply voltage range (4.1V to 5V versus 11V to 17V) and switching frequency (22kHz versus 1.3kHz to 3.3kHz) require circuit redesign. The package change from 16-TSSOP to 8-SOIC also necessitates PCB layout modification.

Q: What is the key difference between MP4068GS-Z and MP4050AGS-Z?

A: MP4068GS-Z provides triac dimming and supports both buck and boost topologies. MP4050AGS-Z supports only buck topology and does not include triac dimming capability. Select MP4068GS-Z when triac dimming or boost topology is required; select MP4050AGS-Z for buck-only applications without dimming.

Q: Are both substitute parts currently available?

A: Yes. MP4068GS-Z has 276,700 units in stock. MP4050AGS-Z has 3,800 units in stock. Both are active products manufactured by Monolithic Power Systems Inc.

Q: Do the substitute parts meet the same compliance standards?

A: Both MP4068GS-Z and MP4050AGS-Z are ROHS3 compliant and REACH unaffected, matching the original part's compliance status. MP4050AGS-Z carries additional automotive grade qualification.

Q: What packaging considerations apply to substitution?

A: The original CS168002-FZZ uses 16-TSSOP packaging (0.173" width, 4.40mm). Both substitutes use 8-SOIC packaging (0.154" width, 3.90mm). PCB footprint redesign is required. The 8-SOIC package is smaller and has fewer leads, requiring schematic and layout revision.