AL1673-20CSP-13 Equivalent & Substitute Parts

Part Overview

The AL1673-20CSP-13 is an LED Driver IC manufactured by Diodes Incorporated, designed for AC DC offline switching applications with PWM dimming capability. This component integrates a 2A output driver supporting multiple topologies including Flyback, Step-Down (Buck), and Step-Up (Boost) configurations. The part is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility with the core electrical parameters and application requirements while accommodating the obsolete status of the original component.

Substiute Parts

AL1673-20CSP-13

Diodes IncorporatedIn Stock: 32418AL1673-20CSP-13 Datasheet

Current PartRFQ

HV9925SG-G

Microchip TechnologyIn Stock: 2036HV9925SG-G Datasheet

MFR RecommendedRFQ

LNK410LG

Power IntegrationsIn Stock: 1164LNK410LG Datasheet

MFR RecommendedRFQ

LYT3328D-TL

Power IntegrationsIn Stock: 55346LYT3328D-TL Datasheet

MFR RecommendedRFQ

MP4032-1GS

Monolithic Power Systems Inc.In Stock: 5672MP4032-1GS Datasheet

MFR RecommendedRFQ

MP4054AGJ-Z

Monolithic Power SystemsIn Stock: 4602MP4054AGJ-Z Datasheet

MFR RecommendedRFQ

MP4088GS

Monolithic Power Systems Inc.In Stock: 842MP4088GS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the AL1673-20CSP-13 is based on the following critical parameters:

Primary Substitution Criteria:

• AC DC Offline Switcher topology with single output
• Supply voltage range compatibility (minimum 7V to 30V maximum)
• Output current capability (2A nominal)
• PWM or Analog dimming support
• Surface mount packaging with 8-pin SOIC or equivalent footprint
• Operating temperature range (-40°C to 105°C minimum)
• RoHS3 compliance and MSL rating

Substitute Parts Identified:

1. HV9925SG-G (Microchip Technology) – Active status, Step-Down topology, PWM dimming, 50mA output, 8-SOIC package, supply range 20V–400V
2. LNK410LG (Power Integrations) – Active status, Flyback topology, Triac dimming, 4.9A output, eSIP-7F package, supply range 36V–725V
3. LYT3328D-TL (Power Integrations) – Active status, multi-topology support, Triac dimming, 16-SOIC package, 85VAC–132VAC supply
4. MP4032-1GS (Monolithic Power Systems Inc.) – Active status, Flyback topology, Triac dimming, 1A output, 8-SOIC package, supply range 10.3V–27V
5. MP4054AGJ-Z (Monolithic Power Systems) – Active status, multi-topology support, PWM dimming, TSOT-23-8 package, supply range 12V–28V

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (8-SOIC Package): MP4032-1GS is the closest electrical match with active product status, supporting Flyback topology and Triac dimming within a compatible supply voltage range (10.3V–27V). This part accommodates the 2A output requirement through its 1A rating with design margin considerations. RoHS3 compliance and MSL-2 rating provide production continuity.

For PWM Dimming Applications: MP4054AGJ-Z offers active status with PWM dimming support and multi-topology capability (Buck, Boost). The TSOT-23-8 package requires PCB layout modification but maintains electrical compatibility within the 12V–28V supply range.

For Extended Temperature Range: LNK410LG and LYT3328D-TL both support -40°C to 150°C operating range, exceeding the original specification. LNK410LG provides higher current capability (4.9A) with Flyback topology, while LYT3328D-TL supports multi-topology configurations. Package changes (eSIP-7F and 16-SOIC respectively) require board redesign.

For Lowest Risk Migration: HV9925SG-G maintains 8-SOIC packaging and active product status with RoHS3 compliance. However, the 50mA output current and Step-Down-only topology limit application scope compared to the original multi-topology design.

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can HV9925SG-G directly replace AL1673-20CSP-13 in all applications? A: No. HV9925SG-G is limited to Step-Down (Buck) topology with 50mA output current, whereas AL1673-20CSP-13 supports Flyback, Buck, and Boost topologies with 2A output. Application-specific topology requirements must be evaluated before substitution.

Q: What is the primary difference between MP4032-1GS and MP4054AGJ-Z? A: MP4032-1GS uses Flyback topology with Triac dimming in an 8-SOIC package (10.3V–27V supply). MP4054AGJ-Z uses Buck/Boost topology with PWM dimming in a TSOT-23-8 package (12V–28V supply). Selection depends on required dimming method and topology compatibility.

Q: Does LYT3328D-TL require PCB layout changes? A: Yes. LYT3328D-TL uses a 16-SOIC package with 14 leads, compared to the 8-SOIC package of AL1673-20CSP-13. PCB footprint redesign is required. Additionally, the MSL-3 rating (168 hours) requires stricter moisture control during assembly compared to the original MSL-1 rating.

Q: Which substitute part has the highest output current capability? A: LNK410LG provides 4.9A output current, exceeding the original 2A specification. This part uses eSIP-7F through-hole packaging and requires significant board redesign but offers superior current handling for high-power LED applications.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All identified substitute parts maintain RoHS3 compliance or equivalent RoHS certification, ensuring regulatory alignment with the original AL1673-20CSP-13 component.

Q: What is the impact of operating temperature differences? A: AL1673-20CSP-13 operates to 105°C (TA). Most substitutes support higher junction temperatures (125°C–150°C TJ). For applications near the original 105°C limit, verify thermal design margins with substitute parts, as junction-to-ambient temperature differential may differ.

Q: Can PWM and Triac dimming parts be used interchangeably? A: No. PWM dimming (HV9925SG-G, MP4054AGJ-Z) and Triac dimming (LNK410LG, LYT3328D-TL, MP4032-1GS) require different control circuitry and dimmer compatibility. Application dimming requirements must be confirmed before selection.