CS1610-FSZR LED Driver IC Equivalent & Substitute Parts

Part Overview

The CS1610-FSZR is an LED Driver IC manufactured by Cirrus Logic Inc., designed for AC DC offline switching applications with Flyback and Step-Up (Boost) topologies. This component features Triac dimming capability and is rated for 1 output with a supply voltage range of 11V to 17V. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

CS1610-FSZR

Cirrus Logic Inc.In Stock: 23470CS1610-FSZR Datasheet

Current PartRFQ

LM3450AMTX/NOPB

Texas InstrumentsIn Stock: 3119LM3450AMTX/NOPB Datasheet

MFR RecommendedRFQ

LNK420EG

Power IntegrationsIn Stock: 18277LNK420EG Datasheet

MFR RecommendedRFQ

LYT0004P

Power IntegrationsIn Stock: 2030LYT0004P Datasheet

MFR RecommendedRFQ

LYT1402D-TL

Power IntegrationsIn Stock: 1075LYT1402D-TL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS1610-FSZR is determined by the following critical parameters:

• Type & Topology: AC DC Offline Switcher with Flyback and/or Step-Up (Boost) capability
• Number of Outputs: Single output configuration
• Supply Voltage Range: Compatibility within or overlapping the 11V to 17V range
• Dimming Method: Triac or Analog dimming support
• Operating Temperature: -40°C to 125°C minimum
• Mounting & Package: Surface mount or through-hole configurations acceptable for lighting applications
• Product Status: Active status preferred for long-term availability

The substitute parts listed below meet these core substitution criteria while offering active product status and improved availability compared to the obsolete CS1610-FSZR.

Parameter Comparison

Engineering Selection Recommendations

LM3450AMTX/NOPB (Texas Instruments) is the primary recommended substitute for surface-mount applications. This part maintains the same Flyback and Step-Up (Boost) topology as the CS1610-FSZR, operates within a compatible supply voltage range (8.5V to 20V), and is actively manufactured. The LM3450AMTX/NOPB features an internal switch and analog dimming capability. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) provide superior long-term reliability compared to the obsolete original part.

LNK420EG (Power Integrations) is suitable for applications requiring higher supply voltage tolerance (36V to 725V) and PWM dimming. This part is actively produced and rated for higher operating temperatures (-40°C to 150°C). The through-hole eSIP-7C package requires PCB layout modification from the original 16-SOIC surface-mount design.

LYT0004P (Power Integrations) offers the broadest topology support (Flyback, SEPIC, Step-Down, Step-Up) and operates across a wide AC input range (85VAC to 308VAC). This through-hole 8-DIP package component is actively manufactured with RoHS compliance and unlimited MSL rating.

LYT1402D-TL (Power Integrations) is optimized for AC input applications (90VAC to 308VAC) with Step-Down (Buck) topology. This actively produced part is specifically rated for lighting applications and operates at 20kHz frequency with RoHS compliance.

All substitute parts maintain the single-output configuration and -40°C to 125°C operating temperature range of the original CS1610-FSZR. Selection should be based on specific topology requirements, input voltage specifications, dimming method compatibility, and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the LM3450AMTX/NOPB directly replace the CS1610-FSZR in existing designs?

A: The LM3450AMTX/NOPB maintains compatible topology (Flyback, Step-Up Boost), single output configuration, and operating temperature range. However, the package differs (16-TSSOP vs. 16-SOIC), requiring PCB layout modification. Supply voltage range compatibility (8.5V to 20V vs. 11V to 17V) is acceptable. Dimming method differs (Analog vs. Triac), which may require circuit design changes depending on application requirements.

Q: What is the primary difference between Triac and Analog dimming in these LED driver ICs?

A: Triac dimming (CS1610-FSZR) uses phase-cut dimming control typical of AC line dimmers. Analog dimming (LM3450AMTX/NOPB) uses DC voltage control. PWM dimming (LNK420EG) uses pulse-width modulation. Selection depends on the dimming interface available in the end application.

Q: Are all substitute parts RoHS compliant?

A: LM3450AMTX/NOPB is RoHS3 compliant. LNK420EG, LYT0004P, and LYT1402D-TL are RoHS compliant. All parts are REACH unaffected. Verify specific compliance requirements for your application and regional regulations.

Q: What are the package considerations when selecting a substitute?

A: The CS1610-FSZR uses 16-SOIC surface-mount packaging. LM3450AMTX/NOPB uses 16-TSSOP (surface-mount, different footprint). LNK420EG uses 7-SSIP through-hole. LYT0004P uses 8-DIP through-hole. LYT1402D-TL package is not specified. PCB layout and assembly process compatibility must be evaluated for each substitute.

Q: Which substitute offers the best long-term availability?

A: All substitute parts are actively manufactured. LYT1402D-TL and LYT0004P are specifically rated for lighting applications. LM3450AMTX/NOPB offers the closest topology match to the original CS1610-FSZR. Inventory levels vary; consult current distributor stock for production planning.

Q: Can LYT0004P and LYT1402D-TL be used interchangeably?

A: No. LYT0004P supports multiple topologies (Flyback, SEPIC, Step-Down, Step-Up) with 225mA output current and operates on 85VAC to 308VAC input. LYT1402D-TL uses Step-Down (Buck) topology and operates on 90VAC to 308VAC input. Topology and current rating differences require application-specific evaluation.