TLC5951RTAR LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5951RTAR is a linear LED driver IC manufactured by Texas Instruments, designed for 24-output shift register applications in signage and display systems. This active product operates across a 3V to 5.5V supply range with 40mA per-channel output capability and 30MHz frequency support. The device is packaged in a 40-WQFN (6x6) configuration with exposed pad and is ROHS3 compliant. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate different electrical performance characteristics.

Substiute Parts

TLC5951RTAR

Texas InstrumentsIn Stock: 27784TLC5951RTAR Datasheet

Current PartRFQ

LED2472GQTR

STMicroelectronicsIn Stock: 4599LED2472GQTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLC5951RTAR is determined by the following critical parameters:

• Output Configuration: 24-output shift register topology with internal switching capability
• Supply Voltage Range: 3V to 5.5V compatibility
• Operating Temperature: -40°C to 85°C range
• Frequency: 30MHz operation
• Compliance: ROHS3 and REACH Unaffected status
• Packaging: Surface mount with exposed pad configuration

The LED2472GQTR qualifies as a substitute based on matching output count, supply voltage range, operating temperature, frequency, and compliance certifications. Differences in per-channel current output (72mA vs. 40mA), output voltage (19V vs. 15V), and physical package dimensions (40-MLPQ-EP 5x5 vs. 40-WQFN 6x6) represent design trade-offs that must be evaluated within the context of the specific application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the TLC5951RTAR and LED2472GQTR maintain active product status with full ROHS3 compliance and REACH Unaffected designation, ensuring regulatory alignment for current manufacturing and deployment. Selection between these devices depends on application-specific requirements regarding per-channel current delivery and output voltage levels. The TLC5951RTAR delivers 40mA per channel at 15V output, while the LED2472GQTR provides 72mA per channel at 19V output. Physical package footprint differences (6x6mm vs. 5x5mm) require PCB layout verification. Both devices operate within identical supply voltage (3V–5.5V), frequency (30MHz), and temperature (-40°C to 85°C) specifications, supporting direct functional substitution when electrical performance parameters align with circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can the LED2472GQTR directly replace the TLC5951RTAR without circuit modification?

A: Direct pin-for-pin replacement is not guaranteed due to package footprint differences (40-WQFN 6x6 vs. 40-MLPQ-EP 5x5). PCB layout and pinout verification is required. The higher per-channel current (72mA vs. 40mA) and output voltage (19V vs. 15V) may require load circuit adjustment.

Q: What are the key compatibility criteria for these substitute parts?

A: Both devices share 24-output shift register topology, 3V–5.5V supply range, 30MHz frequency, -40°C to 85°C operating temperature, and ROHS3/REACH compliance. These parameters define functional equivalence for signage applications.

Q: How do the package differences affect selection?

A: The TLC5951RTAR uses a 40-WQFN (6x6mm) package, while the LED2472GQTR uses a 40-MLPQ-EP (5x5mm) package. Smaller footprint may offer space advantages but requires PCB redesign and pinout verification.

Q: Are there inventory or lead-time considerations?

A: The TLC5951RTAR has 27,700 units in stock, while the LED2472GQTR has 4,530 units available. Inventory levels may influence sourcing decisions based on project timeline requirements.

Q: What electrical performance differences should be evaluated?

A: The LED2472GQTR provides higher per-channel current (72mA vs. 40mA) and output voltage (19V vs. 15V). Applications requiring higher drive capability may benefit from the LED2472GQTR, while lower-power designs may prefer the TLC5951RTAR's reduced current specification.