IRS25401SPBF LED Driver Controller Equivalent & Substitute Parts

Part Overview

The IRS25401SPBF is an LED Driver IC with integrated PWM dimming control, designed as a DC-DC step-down (buck) controller for single-output applications. Manufactured by Infineon Technologies, this component operates across an 8V to 16.6V supply range at 500kHz switching frequency in an 8-SOIC surface mount package.

The IRS25401SPBF is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, redesigns, or legacy system support.

Substiute Parts

IRS25401SPBF

Infineon TechnologiesIn Stock: 1906IRS25401SPBF Datasheet

Current PartRFQ

IRS25411STRPBF

Infineon TechnologiesIn Stock: 30236IRS25411STRPBF Datasheet

DirectRFQ

HV9910CNG-G

Microchip TechnologyIn Stock: 3251HV9910CNG-G Datasheet

MFR RecommendedRFQ

LM3409MY/NOPB

Texas InstrumentsIn Stock: 32706LM3409MY/NOPB Datasheet

MFR RecommendedRFQ

LT3743EUFD#PBF

Analog Devices Inc.In Stock: 2757LT3743EUFD#PBF Datasheet

MFR RecommendedRFQ

LT3743IFE#TRPBF

Analog Devices Inc.In Stock: 4196LT3743IFE#TRPBF Datasheet

MFR RecommendedRFQ

LT3795EFE#PBF

Analog Devices Inc.In Stock: 88493LT3795EFE#PBF Datasheet

MFR RecommendedRFQ

LTC3783EDHD#TRPBF

Analog Devices Inc.In Stock: 2172LTC3783EDHD#TRPBF Datasheet

MFR RecommendedRFQ

MAX16819ATT+T

Analog Devices Inc./Maxim IntegratedIn Stock: 9915MAX16819ATT+T Datasheet

MFR RecommendedRFQ

TPS92641PWPR/NOPB

Texas InstrumentsIn Stock: 2897TPS92641PWPR/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRS25401SPBF is determined by the following critical parameters:

Primary Substitution Criteria:

• DC-DC controller topology (Step-Down/Buck)
• Single output configuration
• PWM dimming capability
• Supply voltage compatibility (minimum 8V operation)
• Surface mount package compatibility
• Operating temperature range support

Substitution Categories:

Category 1: Direct Pin-Compatible Substitutes Parts maintaining the same 8-SOIC package footprint with matching electrical specifications enable direct board-level replacement without layout modifications.

Category 2: Functional Equivalents with Package Variation Parts providing identical control functionality but in alternative surface mount packages (TSSOP, QFN, DFN) require PCB layout redesign but maintain electrical compatibility within specified parameter ranges.

Category 3: Extended-Range Alternatives Parts with broader supply voltage ranges, higher switching frequencies, or enhanced dimming options (analog + PWM) that exceed the original specification while maintaining core buck controller functionality.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitute: IRS25411STRPBF

The IRS25411STRPBF is the optimal substitute for the obsolete IRS25401SPBF. Both parts are manufactured by Infineon Technologies and share identical electrical specifications: 8V to 16.6V supply range, 500kHz switching frequency, PWM dimming control, and 8-SOIC package footprint. The IRS25411STRPBF is currently in active production status with ROHS3 compliance certification. The only parameter variance is the maximum operating temperature, which decreases from 150°C to 125°C (TJ). This part enables direct board-level replacement without design modifications.

Secondary Substitutes for Extended-Range Applications:

LT3743EUFD#PBF and LT3743IFE#TRPBF (Analog Devices Inc.) provide PWM dimming control with expanded supply voltage range (6V to 36V) and higher switching frequency capability (200kHz to 1MHz). These parts require PCB layout redesign due to different package formats (28-QFN and 28-TSSOP respectively) but maintain active product status and ROHS3 compliance.

MAX16819ATT+T (Analog Devices Inc./Maxim Integrated) offers the most compact footprint (6-TDFN, 3x3mm) with PWM dimming and 2MHz switching frequency. Supply voltage range is 4.5V to 28V, which encompasses the original specification. This part is suitable for space-constrained designs requiring board redesign.

For Automotive-Grade Applications:

TPS92641PWPR/NOPB (Texas Instruments) provides automotive-grade qualification with extended supply voltage range (7V to 85V), 1MHz switching frequency, and dual dimming capability (analog and PWM). This part requires layout redesign due to 16-HTSSOP package format.

For Multi-Topology Flexibility:

LTC3783EDHD#TRPBF (Analog Devices Inc.) supports multiple topologies (Flyback, SEPIC, Step-Down, Step-Up) with the broadest supply voltage range (3V to 36V) and frequency range (20kHz to 1MHz). This part is suitable for designs requiring topology flexibility beyond buck conversion.

All recommended substitutes maintain ROHS3 compliance and MSL ratings suitable for standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can IRS25411STRPBF directly replace IRS25401SPBF without PCB modifications?

A: Yes. Both parts share identical 8-SOIC package footprint, supply voltage range (8V to 16.6V), switching frequency (500kHz), and PWM dimming control. Direct board-level substitution is possible. The maximum operating temperature specification decreases from 150°C to 125°C (TJ), which is acceptable for most standard industrial applications.

Q: What is the primary reason to substitute the IRS25401SPBF?

A: The IRS25401SPBF is classified as obsolete. Component availability is limited to existing inventory. The IRS25411STRPBF is the direct equivalent in active production status, ensuring long-term supply chain continuity.

Q: Are there substitutes available in smaller packages?

A: Yes. The MAX16819ATT+T uses a 6-TDFN (3x3mm) package, significantly smaller than the 8-SOIC footprint. This part maintains PWM dimming control and operates within the original supply voltage range (4.5V to 28V encompasses 8V to 16.6V). PCB layout redesign is required.

Q: Which substitutes support higher switching frequencies?

A: LT3743EUFD#PBF, LT3743IFE#TRPBF, LT3795EFE#PBF, LTC3783EDHD#TRPBF, MAX16819ATT+T, and TPS92641PWPR/NOPB all support switching frequencies above 500kHz, ranging from 1MHz to 1MHz maximum. Frequency selection depends on application requirements and PCB layout constraints.

Q: Do all substitutes support PWM dimming?

A: All listed substitutes support PWM dimming. Several parts (HV9910CNG-G, LM3409MY/NOPB, LT3795EFE#PBF, LTC3783EDHD#TRPBF, and TPS92641PWPR/NOPB) additionally support analog dimming control, providing enhanced flexibility for lighting applications.

Q: What is the supply voltage compatibility range across all substitutes?

A: Substitute parts support supply voltage ranges from 3V minimum (LTC3783EDHD#TRPBF) to 450V maximum (HV9910CNG-G). The original IRS25401SPBF operates at 8V to 16.6V. All listed substitutes support operation within or above this range.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All active-status substitute parts listed carry ROHS3 compliance certification. The original IRS25401SPBF (obsolete status) does not specify RoHS compliance.

Q: Which substitutes are suitable for automotive applications?

A: LM3409MY/NOPB and TPS92641PWPR/NOPB carry automotive-grade qualification. Both parts support PWM and analog dimming control with extended operating temperature ranges (-40°C to 125°C).

Q: What package options are available for substitution?

A: Substitute parts are available in the following surface mount packages: 8-SOIC (IRS25411STRPBF), 16-SOIC (HV9910CNG-G), 10-HVSSOP (LM3409MY/NOPB), 28-QFN (LT3743EUFD#PBF), 28-TSSOP-EP (LT3743IFE#TRPBF, LT3795EFE#PBF), 16-DFN (LTC3783EDHD#TRPBF), 6-TDFN (MAX16819ATT+T), and 16-HTSSOP (TPS92641PWPR/NOPB).

Q: What is the moisture sensitivity level (MSL) for substitute parts?

A: The original IRS25401SPBF specifies MSL 2 (1 Year). Substitute parts specify MSL 1 (Unlimited) for most Analog Devices and Maxim parts, and MSL 3 (168 Hours) for LM3409MY/NOPB. MSL 1 provides superior moisture protection for extended storage and manufacturing processes.