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IRS2980STRPBF LED Driver Controller Equivalent & Substitute Parts
Part Overview
The IRS2980STRPBF is an LED Driver IC manufactured by Infineon Technologies, classified as a Power Management (PMIC) device. This single-output DC DC controller implements a step-down (buck) topology with analog and PWM dimming capabilities, operating at 150kHz switching frequency. The device is rated for supply voltages between 10V and 16.6V and is housed in an 8-SOIC package.
The IRS2980STRPBF carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance of systems utilizing this controller.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | IRS2980STRPBF |
| Manufacturer | Infineon Technologies |
| Category | Power Management (PMIC) |
| Type | DC DC Controller |
| Topology | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage Supply Range | 10V to 16.6V |
| Switching Frequency | 150kHz |
| Dimming Capability | Analog, PWM |
| Operating Temperature Range | -40°C to 125°C (TJ) |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| Moisture Sensitivity Level | 2 (1 Year) |
Substitute Part Grouping Explanation
Substitute parts for the IRS2980STRPBF are selected based on the following critical parameters that determine functional compatibility:
Primary Substitution Criteria:
- Topology: Step-Down (Buck) configuration
- Number of Outputs: Single output
- Dimming Support: Analog and/or PWM dimming capability
- Package Compatibility: Surface mount packages suitable for 8-SOIC footprint or compatible alternatives
- Operating Temperature Range: Minimum -40°C to 125°C coverage
- Supply Voltage Range: Overlap with 10V to 16.6V input specification
Substitution Groups:
Group 1 – Direct Package Compatibility (8-SOIC): Parts maintaining the 8-SOIC package form factor with buck topology and dimming support. These offer the highest mechanical and electrical compatibility for direct board-level replacement.
Group 2 – Alternative Package Topologies (16-SOIC, 28-TSSOP, 10-HVSSOP): Parts with equivalent electrical functionality but different package configurations. These require PCB layout modifications but maintain core controller functionality.
Group 3 – Extended Voltage Range & Automotive Grade: Parts supporting wider input voltage ranges and automotive qualification (AEC-Q100), suitable for applications requiring enhanced reliability specifications.
Parameter Comparison
| Parameter | IRS2980STRPBF | IRS25411STRPBF | AT9919K7-G | BD8381EFV-ME2 | HV9861ANG-G | HV9961NG-G | LM3409HVMYX/NOPB | LT3763HFE#TRPBF |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Infineon | Infineon | Microchip | ROHM | Microchip | Microchip | Texas Instruments | Analog Devices |
| Type | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller |
| Topology | Buck | Buck | Buck | Buck/Boost | Buck | Buck | Buck | Buck |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply Min | 10V | 8V | 4.5V | 5V | 15V | 8V | 6V | 6V |
| Voltage Supply Max | 16.6V | 16.6V | 40V | 30V | 450V | 450V | 75V | 60V |
| Switching Frequency | 150kHz | 500kHz | 2MHz | 200-600kHz | Not Specified | Not Specified | Not Specified | 200kHz-1MHz |
| Dimming | Analog, PWM | PWM | Analog, PWM | PWM | Analog, PWM | Analog, PWM | Analog, PWM | PWM |
| Operating Temperature | -40 to 125°C (TJ) | -25 to 125°C (TJ) | -40 to 125°C (TA) | -40 to 125°C (TA) | -40 to 125°C (TA) | -40 to 125°C (TA) | -40 to 125°C (TJ) | -40 to 150°C (TJ) |
| Package | 8-SOIC | 8-SOIC | 8-DFN (3x3) | 28-HTSSOP-B | 16-SOIC | 16-SOIC | 10-HVSSOP | 28-TSSOP-EP |
| Product Status | Obsolete | Active | Active | Not For New Designs | Active | Active | Active | Active |
| RoHS Status | Not Specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Automotive Grade | Not Specified | Not Specified | AEC-Q100 | Automotive | Not Specified | Not Specified | Automotive | Not Specified |
Engineering Selection Recommendations
For Direct Replacement (Highest Compatibility):
IRS25411STRPBF is the primary substitute. It maintains the 8-SOIC package footprint and Infineon manufacturer lineage. Both devices operate within overlapping supply voltage ranges (8V to 16.6V). The IRS25411STRPBF is in active production status with ROHS3 compliance, addressing the obsolescence of the original part. The switching frequency increase from 150kHz to 500kHz may require component value adjustments in the external filter network but does not prevent functional substitution.
For Applications Requiring Extended Voltage Range:
AT9919K7-G (Microchip) supports 4.5V to 40V input range with 2MHz switching frequency and AEC-Q100 automotive qualification. This part accommodates wider design margins and automotive-grade reliability requirements. Package change to 8-DFN (3x3) requires PCB layout modification.
LM3409HVMYX/NOPB (Texas Instruments) extends the supply range to 6V to 75V with automotive grade qualification. The 10-HVSSOP package requires layout redesign but provides enhanced voltage headroom for diverse application scenarios.
For High-Voltage Applications (>60V Input):
HV9861ANG-G and HV9961NG-G (Microchip) support input voltages up to 450V, suitable for high-voltage LED driver applications. These 16-SOIC devices maintain analog and PWM dimming but require significant PCB redesign due to package differences.
For Applications Requiring Enhanced Temperature Performance:
LT3763HFE#TRPBF (Analog Devices) operates to 150°C junction temperature, exceeding the original specification. This part supports PWM dimming and 6V to 60V input range in a 28-TSSOP-EP package.
Parts to Avoid for New Designs:
BD8381EFV-ME2 carries "Not For New Designs" status despite active inventory. This part combines buck and boost topologies, introducing unnecessary complexity for buck-only applications.
Frequently Asked Questions (FAQ)
Q: Can IRS25411STRPBF directly replace IRS2980STRPBF without PCB modifications?
A: Yes, both parts use the 8-SOIC package with identical pin spacing and mounting footprint. However, the increased switching frequency (500kHz vs. 150kHz) may require recalculation of external inductor and capacitor values to maintain the same output ripple specifications. Verify component ratings before assembly.
Q: What is the primary difference between IRS2980STRPBF and AT9919K7-G?
A: The AT9919K7-G supports a wider input voltage range (4.5V to 40V vs. 10V to 16.6V) and operates at higher switching frequency (2MHz). The package changes from 8-SOIC to 8-DFN (3x3), requiring PCB layout redesign. The AT9919K7-G includes AEC-Q100 automotive qualification.
Q: Are the 16-SOIC alternatives (HV9861ANG-G, HV9961NG-G) suitable for standard LED driver applications?
A: These parts are designed for high-voltage LED applications with input ranges up to 450V. They are over-specified for standard 10V to 16.6V applications. Use these only if your design requires high-voltage input capability. The 16-SOIC package requires significant PCB redesign compared to the 8-SOIC original.
Q: What does "Not For New Designs" mean for BD8381EFV-ME2?
A: This designation indicates the manufacturer recommends against using this part in new product development, though existing inventory remains available. The part combines buck and boost topologies, adding unnecessary complexity for applications requiring only buck conversion. Select alternative parts for new designs.
Q: How does the dimming capability differ between substitutes?
A: IRS2980STRPBF supports both analog and PWM dimming. IRS25411STRPBF supports PWM only. LT3763HFE#TRPBF supports PWM only. AT9919K7-G, HV9861ANG-G, HV9961NG-G, and LM3409HVMYX/NOPB support both analog and PWM. Verify your application's dimming requirements before selection.
Q: Which substitute offers the best compliance and reliability for automotive applications?
A: AT9919K7-G and LM3409HVMYX/NOPB both carry automotive grade designation with AEC-Q100 qualification. LM3409QHVMYX/NOPB provides the same functionality with additional AEC-Q100 qualification documentation. These parts are suitable for automotive LED driver applications.
Q: Can I use LT3763HFE#TRPBF as a direct replacement?
A: No. LT3763HFE#TRPBF uses a 28-TSSOP-EP package versus the 8-SOIC original, requiring complete PCB redesign. However, it offers superior temperature performance (-40°C to 150°C) and supports PWM dimming with 6V to 60V input range. Consider this part only if layout redesign is acceptable.
Q: What is the significance of the MSL (Moisture Sensitivity Level) rating?
A: IRS2980STRPBF has MSL 2 (1 Year), meaning it requires dry storage and has a one-year shelf life after moisture exposure. Most substitutes have MSL 1 (Unlimited) or MSL 3 (168 Hours), affecting storage and handling requirements. Verify MSL compatibility with your supply chain and manufacturing processes.
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