TLC5970RHPT LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5970RHPT is a 3-output LED driver IC with integrated DC-DC buck regulator topology, rated for 150mA per channel output current. Manufactured by Texas Instruments, this component is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The device operates across a 10V to 36V supply range and is packaged in a 28-QFN (6x6) surface mount configuration with an exposed pad for thermal management.

Substiute Parts

TLC5970RHPT

Texas InstrumentsIn Stock: 1509TLC5970RHPT Datasheet

Current PartRFQ

LT3003EMSE#PBF

Analog Devices Inc.In Stock: 2712LT3003EMSE#PBF Datasheet

MFR RecommendedRFQ

LT3492EUFD#PBF

Analog Devices Inc.In Stock: 2411LT3492EUFD#PBF Datasheet

MFR RecommendedRFQ

LTC3212EDDB#TRPBF

Analog Devices Inc.In Stock: 2150LTC3212EDDB#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLC5970RHPT is determined by the following critical parameters: number of outputs (3-channel requirement), internal switching capability, surface mount packaging compatibility, and regulatory compliance (ROHS3). The substitute parts listed below maintain these core functional requirements while offering variations in topology, current handling, and supply voltage ranges.

The three qualified substitutes represent different design approaches:

LT3003EMSE#PBF provides dual topology capability (buck and boost) with higher current output (350mA) and extended supply voltage range (3V-40V), suitable for applications requiring flexible voltage conversion.

LT3492EUFD#PBF offers the most versatile topology support (SEPIC, buck, and boost) with the highest current rating (600mA switch current) and adjustable frequency range (330kHz-2.1MHz), designed for demanding LED driver applications.

LTC3212EDDB#TRPBF employs switched capacitor (charge pump) topology with lower current output (25mA) and restricted supply voltage range (2.7V-5.5V), suitable for lower-power LED backlight applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment. Selection between substitutes depends on application-specific requirements:

LT3003EMSE#PBF is recommended for applications requiring flexible input voltage handling (3V-40V range) and moderate current demands (350mA per channel). The dual topology support enables both step-down and step-up conversion within a single device. Extended operating temperature range (-40°C to 125°C junction temperature) supports industrial environments.

LT3492EUFD#PBF is suitable for high-current LED driver applications requiring up to 600mA switch current and multi-topology support (SEPIC, buck, boost). The adjustable frequency range (330kHz-2.1MHz) provides design flexibility for EMI management and efficiency optimization. This part offers the broadest functional capability among the substitutes.

LTC3212EDDB#TRPBF addresses low-power LED backlight applications with restricted supply voltage (2.7V-5.5V) and lower current output (25mA per channel). The switched capacitor topology eliminates the need for external inductors, reducing board space and component count. MSL rating of 1 (unlimited) provides superior moisture handling compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can LT3003EMSE#PBF directly replace TLC5970RHPT in existing designs?

A: Direct replacement requires circuit redesign. While both devices provide 3-output LED driver functionality with internal switching, the LT3003EMSE#PBF operates across a wider supply voltage range (3V-40V vs. 10V-36V) and supports dual topology (buck and boost). Package differences (10-MSOP-EP vs. 28-QFN) necessitate PCB layout modifications. Verify output voltage requirements and current specifications for your application.

Q: What are the key differences between LT3492EUFD#PBF and LT3003EMSE#PBF?

A: LT3492EUFD#PBF provides higher current capability (600mA switch vs. 350mA), supports SEPIC topology in addition to buck and boost, and offers adjustable switching frequency (330kHz-2.1MHz). LT3003EMSE#PBF operates across a wider supply voltage range (3V-40V vs. 3V-30V). Package size differs: LT3492EUFD#PBF uses 28-QFN (4x5) while LT3003EMSE#PBF uses 10-MSOP-EP.

Q: Is LTC3212EDDB#TRPBF suitable for replacing TLC5970RHPT?

A: LTC3212EDDB#TRPBF is not recommended as a direct substitute for general-purpose applications. This part is optimized for low-power LED backlight applications with restricted supply voltage (2.7V-5.5V) and significantly lower current output (25mA per channel vs. 150mA). Use only when application requirements align with these specifications.

Q: What packaging considerations apply when substituting these parts?

A: TLC5970RHPT uses 28-QFN (6x6) packaging. LT3003EMSE#PBF uses 10-MSOP-EP (significantly smaller), LT3492EUFD#PBF uses 28-QFN (4x5) (similar footprint but different dimensions), and LTC3212EDDB#TRPBF uses 12-DFN (3x2) (much smaller). PCB layout and thermal management designs require adjustment for each substitute.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TLC5970RHPT, LT3003EMSE#PBF, LT3492EUFD#PBF, and LTC3212EDDB#TRPBF are all ROHS3 compliant. All parts carry REACH Unaffected status and EAR99 ECCN classification.

Q: What is the moisture sensitivity difference between the original and substitute parts?

A: TLC5970RHPT carries MSL rating 2 (1 Year), requiring controlled storage conditions. All three substitute parts carry MSL rating 1 (Unlimited), providing superior moisture tolerance and simplified storage requirements.