CS1616-FZZ LED Driver IC Equivalent & Substitute Parts

Part Overview

The CS1616-FZZ is an LED driver IC manufactured by Cirrus Logic Inc., designed for offline AC/DC switching applications with Triac dimming capability. This component is classified as a Power Management IC (PMIC) and is currently listed as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for design continuity, production planning, and system maintenance. The CS1616-FZZ operates across a 11V to 17V supply range and supports Flyback, Step-Down (Buck), and Step-Up (Boost) topologies for lighting applications.

Substiute Parts

CS1616-FZZ

Cirrus Logic Inc.In Stock: 1817CS1616-FZZ Datasheet

Current PartRFQ

AL9910ASP-13

Diodes IncorporatedIn Stock: 1438AL9910ASP-13 Datasheet

MFR RecommendedRFQ

LM3497MM/NOPB

Texas InstrumentsIn Stock: 1015LM3497MM/NOPB Datasheet

MFR RecommendedRFQ

MP4652ES-LF

Monolithic Power Systems Inc.In Stock: 1112MP4652ES-LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS1616-FZZ are selected based on functional equivalence within the LED driver IC category. The primary substitution criteria are:

Core Functional Requirements:

• AC DC Offline Switcher topology
• Single output configuration
• Surface mount packaging
• Lighting application suitability
• Triac or PWM dimming capability

Electrical Compatibility Considerations:

• Supply voltage range overlap or compatibility with system design
• Operating frequency range suitable for offline switching applications
• Dimming method compatibility (Triac preferred for direct replacement; PWM acceptable for redesign scenarios)
• Operating temperature range meeting or exceeding -40°C to 125°C

Physical & Compliance Factors:

• Surface mount package compatibility with PCB layout
• RoHS and REACH compliance status
• Moisture sensitivity level appropriate for manufacturing and storage

The three substitute parts identified—AL9910ASP-13, LM3497MM/NOPB, and MP4652ES-LF—each meet these core criteria with varying degrees of parameter alignment and product status advantages.

Parameter Comparison

Engineering Selection Recommendations

AL9910ASP-13 (Diodes Incorporated)

This substitute offers the broadest supply voltage range (20V – 500V) and active product status. It supports both Analog and PWM dimming methods, providing flexibility for applications requiring dimming control beyond Triac. The 8-SOIC-EP package is smaller than the original 16-TSSOP, which may require PCB layout modifications. Moisture sensitivity level 1 provides superior handling characteristics compared to the CS1616-FZZ. This part is suitable for designs where supply voltage can be adapted and PWM dimming is acceptable.

LM3497MM/NOPB (Texas Instruments)

This substitute provides the closest functional match to the CS1616-FZZ, featuring identical Triac dimming capability and matching operating temperature range (-40°C to 125°C). The supply voltage range (8V – 12V) is narrower than the original but overlaps the lower end of the CS1616-FZZ specification. The 10-VSSOP package is smaller than the 16-TSSOP original, requiring PCB redesign. Active product status and ROHS3 compliance ensure long-term availability and regulatory compliance. This part is the preferred direct replacement for Triac-dimmed lighting applications.

MP4652ES-LF (Monolithic Power Systems Inc.)

This substitute employs a Half-Bridge topology and PWM dimming, differing from the original Flyback/Buck/Boost configuration. The supply voltage range (9V – 30V) accommodates the original specification's lower bound. Operating temperature range (-20°C to 85°C) is narrower than the CS1616-FZZ, limiting suitability for extended temperature applications. The 16-SOIC package matches the pin count of the original, potentially simplifying PCB layout. This part is suitable for applications where Half-Bridge topology and PWM dimming are compatible with system requirements.

Frequently Asked Questions (FAQ)

Q: Can the AL9910ASP-13 directly replace the CS1616-FZZ without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (8-SOIC-EP versus 16-TSSOP) and pin counts. Additionally, the AL9910ASP-13 supports PWM dimming rather than Triac dimming, requiring dimming circuit redesign. PCB layout modifications are necessary.

Q: Is the LM3497MM/NOPB suitable for all CS1616-FZZ applications?

A: The LM3497MM/NOPB is suitable for applications operating within its 8V – 12V supply range and requiring Triac dimming. Applications requiring the full 11V – 17V range of the original part or topologies beyond Buck configuration require evaluation. Package differences necessitate PCB redesign.

Q: What are the key differences between Triac and PWM dimming in these substitutes?

A: Triac dimming (CS1616-FZZ, LM3497MM/NOPB) is phase-cut dimming compatible with standard AC line dimmers. PWM dimming (AL9910ASP-13, MP4652ES-LF) uses pulse-width modulation and requires dedicated PWM control circuitry. Application requirements determine which dimming method is appropriate.

Q: Does the CS1616-FZZ obsolescence affect long-term availability of substitute parts?

A: All three substitute parts carry Active product status from their respective manufacturers, ensuring continued availability and support. However, design migration to an active part should be prioritized to avoid future obsolescence issues.

Q: How do package differences impact PCB design when substituting these parts?

A: Package changes require PCB layout modifications including trace routing, via placement, and thermal management considerations. The 16-TSSOP original has different pin spacing and thermal characteristics than the 8-SOIC-EP, 10-VSSOP, or 16-SOIC alternatives. Thermal analysis and layout review are necessary for each substitute.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all three substitute parts (AL9910ASP-13, LM3497MM/NOPB, MP4652ES-LF) are ROHS3 compliant. The original CS1616-FZZ RoHS status is not specified in available documentation.