LDS8620-002-T2 Equivalent & Substitute Parts

Part Overview

The LDS8620-002-T2 is an LED Driver IC with integrated 2-output DC DC regulator utilizing switched capacitor (charge pump) topology. Manufactured by IXYS Integrated Circuits Division, this component operates at 96mA per channel with PWM dimming capability in a 16-TQFN (3x3) surface mount package. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LDS8620-002-T2

IXYS Integrated Circuits DivisionIn Stock: 2405LDS8620-002-T2 Datasheet

Current PartRFQ

LT3475IFE-1#TRPBF

Analog Devices Inc.In Stock: 3330LT3475IFE-1#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LDS8620-002-T2 is determined by the following critical parameters:

• Dual Output Configuration: The substitute must provide 2 independent regulated outputs
• PWM Dimming Capability: LED driver functionality with PWM dimming control is required
• Output Current Rating: Minimum 96mA per channel capability
• Supply Voltage Range: Operation within or compatible with 2.7V to 5.5V input specification
• Surface Mount Packaging: Compatible with SMT assembly processes
• Regulatory Compliance: ROHS3 compliance and MSL rating maintained

The LT3475IFE-1#TRPBF qualifies as a manufacturer-recommended substitute based on these parameters. While topology differs (step-down buck vs. switched capacitor), both devices deliver dual-output LED driver functionality with PWM dimming and exceed the current handling requirements of the original part.

Parameter Comparison

Engineering Selection Recommendations

The LT3475IFE-1#TRPBF is designated as the manufacturer-recommended substitute for the obsolete LDS8620-002-T2. Selection of this alternative is supported by:

• Active Product Status: The LT3475IFE-1#TRPBF maintains active production status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both ROHS3 compliance and MSL 1 rating are maintained, meeting environmental and handling requirements
• Functional Equivalence: Dual-output LED driver with PWM dimming capability satisfies the core functional requirements
• Enhanced Specifications: The substitute provides superior current handling (1.5A vs. 96mA per channel) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C)
• Supply Voltage Compatibility: The substitute operates across a wider input range (3.7V to 36V), accommodating the original 2.7V to 5.5V specification with margin

Design migration requires PCB layout revision due to package change from 16-TQFN to 20-TSSOP-EP and topology transition from charge pump to buck converter. Thermal and filtering characteristics may differ; circuit validation is necessary during integration.

Frequently Asked Questions (FAQ)

Q: Why is the LDS8620-002-T2 being discontinued? A: The LDS8620-002-T2 is classified as obsolete. The LT3475IFE-1#TRPBF is the manufacturer-recommended active alternative.

Q: Can the LT3475IFE-1#TRPBF directly replace the LDS8620-002-T2 without PCB modification? A: No. The substitute uses a different package (20-TSSOP-EP vs. 16-TQFN) and topology (buck vs. charge pump), requiring PCB redesign and circuit validation.

Q: What is the key functional difference between the two topologies? A: The LDS8620-002-T2 uses switched capacitor (charge pump) topology, while the LT3475IFE-1#TRPBF uses step-down (buck) topology. Both deliver dual-output LED driver functionality with PWM dimming.

Q: Does the substitute meet the same compliance requirements? A: Yes. Both parts are ROHS3 compliant with MSL 1 rating and EAR99 ECCN classification.

Q: What are the current handling differences? A: The LDS8620-002-T2 provides 96mA per channel. The LT3475IFE-1#TRPBF provides 1.5A per channel, offering significantly higher current capacity.

Q: Is the operating temperature range compatible? A: The LDS8620-002-T2 operates -40°C to 85°C. The LT3475IFE-1#TRPBF operates -40°C to 125°C, providing extended high-temperature capability.

Q: What supply voltage range does the substitute support? A: The LT3475IFE-1#TRPBF operates from 3.7V to 36V, which encompasses the original part's 2.7V to 5.5V range with additional headroom.

Q: Are there packaging considerations for assembly? A: Yes. The substitute transitions from 16-pin TQFN to 20-pin TSSOP with exposed pad. Assembly equipment and solder profile validation are required.