TLC5970RHPR LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5970RHPR is a 3-output LED driver IC with integrated DC-DC regulator functionality, manufactured by Texas Instruments. This device features step-down (buck) topology with 150mA per-channel output capability and operates across a 10V to 36V supply range. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

TLC5970RHPR

Texas InstrumentsIn Stock: 2750TLC5970RHPR Datasheet

Current PartRFQ

BD82103GWL-E2

Rohm SemiconductorIn Stock: 2165BD82103GWL-E2 Datasheet

MFR RecommendedRFQ

LT3496EFE#PBF

Analog Devices Inc.In Stock: 1436LT3496EFE#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLC5970RHPR is determined by the following critical parameters:

• Number of Outputs: Must provide 3 independent output channels for LED driver functionality
• Internal Switch(s): Must include integrated switching capability
• Supply Voltage Range: Must accommodate the 10V to 36V input specification
• Output Current Capability: Must support minimum 150mA per-channel operation
• Topology Compatibility: Step-down (buck) topology is primary; step-down/step-up (buck/boost) combinations are acceptable for broader input range support
• Regulatory Compliance: ROHS3 compliance and EAR99 classification required
• Mounting Type: Surface mount packages only

The identified substitute parts meet these criteria with the following considerations:

BD82103GWL-E2 (Rohm Semiconductor): Provides 3-output LED driver with integrated switching. Uses switched capacitor (charge pump) topology with lower supply voltage range (2.7V–5.5V), limiting direct substitution to applications within this narrower input window.

LT3496EFE#PBF (Analog Devices Inc.): Provides 3-output LED driver with integrated switching and dual topology support (step-down/step-up). Supports 3V–30V supply range with higher per-channel current capability (1A switch current) and extended temperature range (-40°C to 125°C junction temperature).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in 10V–30V Supply Applications:

LT3496EFE#PBF is the primary substitute for the TLC5970RHPR. Both devices support the required 10V minimum supply voltage and provide 3-output LED driver functionality with integrated switching. The LT3496EFE#PBF offers superior specifications: higher per-channel current capability (1A vs. 150mA), extended operating temperature range to 125°C junction temperature, and active product status ensuring long-term availability. The dual topology support (buck/boost) provides additional design flexibility for applications requiring voltage step-up capability. Package transition from 28-VQFN to 28-TSSOP-EP requires PCB layout modification but maintains similar form factor and pin count compatibility.

For Low-Voltage Applications (2.7V–5.5V Supply Only):

BD82103GWL-E2 is suitable only for applications operating within its 2.7V to 5.5V supply range. This device uses switched capacitor topology, which differs fundamentally from the TLC5970RHPR step-down architecture. The 20mA per-channel output current is significantly lower than the 150mA specification of the original part. This substitute is applicable only to redesigned circuits with reduced current requirements and lower supply voltages. The UCSP50L1 package (11-UFBGA, CSPBGA) represents a significant form factor change from the original 28-VQFN package.

Compliance and Availability:

Both substitute parts maintain ROHS3 compliance and EAR99 classification, meeting regulatory requirements equivalent to the original TLC5970RHPR. Both are classified as active products with confirmed inventory availability, ensuring production continuity and long-term supply security.

Frequently Asked Questions (FAQ)

Q: Can the BD82103GWL-E2 directly replace the TLC5970RHPR in existing designs?

A: No. The BD82103GWL-E2 operates only within a 2.7V to 5.5V supply range, which does not overlap with the TLC5970RHPR's 10V to 36V specification. Additionally, the 20mA per-channel output current is insufficient for applications requiring 150mA per channel. This device requires circuit redesign and is suitable only for new applications with lower voltage and current requirements.

Q: Is the LT3496EFE#PBF a pin-compatible replacement?

A: No. The LT3496EFE#PBF uses a 28-TSSOP-EP package, while the TLC5970RHPR uses a 28-VQFN package. Although both are 28-pin surface mount packages, the pinout differs and requires PCB layout modification. Pin function mapping must be verified against both datasheets before implementation.

Q: What are the key advantages of the LT3496EFE#PBF over the TLC5970RHPR?

A: The LT3496EFE#PBF provides higher per-channel current capability (1A vs. 150mA), extended operating temperature range to 125°C junction temperature, dual topology support (buck/boost) for broader input voltage flexibility, and active product status with guaranteed long-term availability. These specifications exceed the original part's capabilities.

Q: Are there supply voltage compatibility issues with the LT3496EFE#PBF?

A: No. The LT3496EFE#PBF supports 3V to 30V supply range, which fully encompasses the TLC5970RHPR's 10V to 36V specification. The upper limit of 30V is slightly lower than the original 36V maximum, which may require verification for applications operating at the extreme upper voltage boundary.

Q: What is the impact of topology differences between the TLC5970RHPR and substitute parts?

A: The TLC5970RHPR uses step-down (buck) topology. The LT3496EFE#PBF supports both step-down and step-up (boost) topologies, providing equivalent or superior functionality. The BD82103GWL-E2 uses switched capacitor (charge pump) topology, which is fundamentally different and suitable only for low-voltage applications with redesigned circuits.

Q: Do the substitute parts require different PCB layout considerations?

A: Yes. Package changes from 28-VQFN to either 28-TSSOP-EP (LT3496EFE#PBF) or 11-UFBGA/CSPBGA (BD82103GWL-E2) require PCB layout modification. Thermal management, trace routing, and decoupling capacitor placement may differ based on the new package specifications and thermal characteristics.

Q: What is the moisture sensitivity impact of using substitute parts?

A: The TLC5970RHPR has MSL 2 (1 Year), while both substitute parts have MSL 1 (Unlimited). This represents an improvement in moisture tolerance, reducing handling and storage constraints during manufacturing and assembly processes.