CS1610-FSZ LED Driver IC Equivalent & Substitute Parts

Part Overview

The CS1610-FSZ is an offline LED driver IC manufactured by Cirrus Logic Inc., designed for AC/DC lighting applications using a flyback and step-up (boost) topology with triac dimming capability. The device operates with a supply voltage range of 11V to 17V and is housed in a 16-SOIC package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity.

Substiute Parts

CS1610-FSZ

Cirrus Logic Inc.In Stock: 1884CS1610-FSZ Datasheet

Current PartRFQ

HV9801ALG-G

Microchip TechnologyIn Stock: 1150HV9801ALG-G Datasheet

MFR RecommendedRFQ

LM3450AMT/NOPB

Texas InstrumentsIn Stock: 1255LM3450AMT/NOPB Datasheet

MFR RecommendedRFQ

MXHV9910BETR

LittelfuseIn Stock: 5627MXHV9910BETR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CS1610-FSZ is determined by the following critical parameters:

• Type & Topology: AC DC offline switcher with flyback/boost topology for LED driver applications
• Dimming Capability: Triac dimming support for lighting control
• Supply Voltage Range: 11V to 17V input compatibility
• Package Compatibility: 16-SOIC form factor for direct PCB replacement
• Operating Temperature Range: -40°C to 125°C thermal specification
• Product Status: Active alternatives required due to obsolescence

The substitute parts listed below are grouped based on their ability to function in offline LED driver applications. However, topology and dimming method variations exist among substitutes, requiring design-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

LM3450AMT/NOPB (Texas Instruments) is the closest functional equivalent to the CS1610-FSZ. Both devices employ flyback and step-up (boost) topology for offline LED driver applications. The LM3450AMT/NOPB operates within an overlapping supply voltage range (8.5V to 20V encompasses the CS1610-FSZ range of 11V to 17V) and maintains the same operating temperature specification (-40°C to 125°C). The primary difference is the package format (16-TSSOP versus 16-SOIC) and dimming method (analog versus triac). The LM3450AMT/NOPB is ROHS3 compliant and carries MSL 1 rating, providing superior moisture handling compared to the original part.

HV9801ALG-G (Microchip Technology) and MXHV9910BETR (Littelfuse) are alternative offline LED drivers with step-down (buck) topology. These devices differ fundamentally in topology from the CS1610-FSZ and employ PWM dimming instead of triac control. Selection of these alternatives requires circuit redesign and is suitable only for applications where buck topology and PWM dimming are acceptable. Both are ROHS3 compliant with MSL 1 ratings.

For direct replacement with minimal circuit modification, the LM3450AMT/NOPB is recommended. For applications requiring topology flexibility, HV9801ALG-G and MXHV9910BETR provide active alternatives with extended supply voltage ranges.

Frequently Asked Questions (FAQ)

Q: Can the HV9801ALG-G or MXHV9910BETR directly replace the CS1610-FSZ on the same PCB?

A: No. While all three are offline LED driver ICs, the HV9801ALG-G and MXHV9910BETR use step-down (buck) topology versus the flyback/boost topology of the CS1610-FSZ. Additionally, the package formats differ (8-SOIC versus 16-SOIC), and dimming methods are incompatible (PWM versus triac). Circuit redesign is required.

Q: Is the LM3450AMT/NOPB a pin-compatible replacement?

A: No. The LM3450AMT/NOPB uses a 16-TSSOP package while the CS1610-FSZ uses 16-SOIC. Although both are 16-pin packages, the pinout and physical dimensions differ. PCB layout modification is necessary. However, the functional topology (flyback/boost) and operating voltage range provide the closest electrical compatibility.

Q: What is the significance of the MSL rating difference?

A: The CS1610-FSZ carries MSL 3 (168 hours), while all substitute parts carry MSL 1 (unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without baking requirements. This is an advantage for inventory management and long-term storage.

Q: Why does the MXHV9910BETR have a lower maximum operating temperature (85°C) compared to the CS1610-FSZ (125°C)?

A: The MXHV9910BETR specifies ambient temperature (TA) of -40°C to 85°C, while the CS1610-FSZ specifies junction temperature (TJ) of -40°C to 125°C. These are different measurement points. The MXHV9910BETR's ambient temperature specification may be more restrictive for high-power applications where junction temperature exceeds ambient temperature significantly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. HV9801ALG-G, LM3450AMT/NOPB, and MXHV9910BETR are all ROHS3 compliant. The CS1610-FSZ RoHS status is not specified in the provided data.

Q: Which substitute offers the widest supply voltage range?

A: Both HV9801ALG-G and MXHV9910BETR support 450V maximum supply voltage, significantly exceeding the CS1610-FSZ (17V max) and LM3450AMT/NOPB (20V max). This extended range is suitable for universal AC input applications but requires appropriate circuit design.