TS19375CS RLG LED Driver Controller Equivalent & Substitute Parts

Part Overview

The TS19375CS RLG is an LED Driver IC manufactured by Taiwan Semiconductor Corporation, classified as a Power Management PMIC. This device functions as a DC DC Controller with Step-Up (Boost) topology, designed for single-output LED backlight applications. The part operates across a 3V to 24V supply voltage range at 500kHz switching frequency and is packaged in an 8-SOP surface mount configuration.

The TS19375CS RLG carries a "Not For New Designs" product status designation. This classification necessitates identification of equivalent substitute components for ongoing production requirements, maintenance applications, and new design implementations where similar functional specifications are required.

Substiute Parts

TS19375CS RLG

Taiwan Semiconductor CorporationIn Stock: 3279TS19375CS RLG Datasheet

Current PartRFQ

LT3756IMSE#PBF

Analog Devices Inc.In Stock: 4893LT3756IMSE#PBF Datasheet

SimilarRFQ

LT8391IUFD#PBF

Analog Devices Inc.In Stock: 2085LT8391IUFD#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the TS19375CS RLG are selected based on functional equivalence within the Power Management PMIC category. The primary substitution criteria are:

Functional Requirements:

• DC DC Controller type classification
• Step-Up (Boost) topology capability (or multi-topology support including Boost)
• Single output configuration
• LED driver application suitability

Electrical Compatibility Parameters:

• Supply voltage range overlap with the 3V to 24V specification
• Operating frequency in the range of 100kHz to 1MHz
• Operating temperature range of -40°C to 125°C or better
• Internal switch configuration: No (controller-only devices)

Physical & Compliance Requirements:

• Surface mount packaging
• ROHS3 compliance
• REACH unaffected status
• Active or current product status (preferred over obsolete classifications)

The identified substitute parts meet these criteria while offering enhanced capabilities such as extended voltage ranges, multiple topology support, and advanced dimming features.

Parameter Comparison

Engineering Selection Recommendations

LT3756IMSE#PBF Substitution:

The LT3756IMSE#PBF from Analog Devices Inc. is an active product suitable for direct substitution in applications requiring Step-Up (Boost) topology. This device supports the full Boost topology required by the TS19375CS RLG and extends the supply voltage range to 100V maximum, providing design flexibility for higher voltage applications. The operating temperature range of -40°C to 125°C exceeds the original specification. The 16-MSOP-EP package is larger than the 8-SOP original, requiring PCB layout modification. This substitute is ROHS3 compliant and carries active product status, making it suitable for new designs and long-term production support.

LT8391IUFD#PBF Substitution:

The LT8391IUFD#PBF from Analog Devices Inc. is an active product offering Step-Up (Boost) capability within a supply voltage range of 4V to 60V. The minimum supply voltage of 4V is compatible with the original 3V minimum specification for most practical applications. This device includes automotive-grade qualification and operates across -40°C to 125°C. The 28-QFN (4x5) package represents a significant footprint change from the 8-SOP original, requiring substantial PCB redesign. This substitute is ROHS3 compliant and carries active product status with extended MSL rating of 1 (Unlimited), indicating superior moisture resistance for manufacturing environments.

Both substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original component. Selection between substitutes depends on application voltage requirements, PCB space constraints, and thermal management capabilities.

Frequently Asked Questions (FAQ)

Q: Can the LT3756IMSE#PBF directly replace the TS19375CS RLG without PCB modifications?

A: The LT3756IMSE#PBF provides functional equivalence for Step-Up (Boost) applications but requires PCB layout changes. The 16-MSOP-EP package (0.118" width) differs from the 8-SOP package (0.154" width), necessitating new footprint design and routing. Pin configuration differences require schematic review and potential circuit modifications.

Q: What is the minimum supply voltage compatibility between substitutes and the original part?

A: The TS19375CS RLG operates from 3V minimum. The LT3756IMSE#PBF requires 6V minimum, creating a 3V gap. The LT8391IUFD#PBF requires 4V minimum, creating a 1V gap. Applications operating below the substitute minimum voltage require alternative solutions.

Q: Are both substitute parts suitable for LED backlight applications?

A: The LT3756IMSE#PBF does not specify LED backlight in its applications field. The LT8391IUFD#PBF explicitly lists Lighting applications. Both devices function as DC DC Controllers suitable for LED driver implementations, but application-specific validation is required for backlight-specific requirements.

Q: What are the package footprint implications of substitution?

A: The original TS19375CS RLG uses 8-SOP (0.154" width). The LT3756IMSE#PBF uses 16-MSOP-EP (0.118" width, but 16 pins versus 8 pins). The LT8391IUFD#PBF uses 28-QFN (4x5) with exposed pad. Both substitutes require complete PCB redesign and cannot use existing footprints.

Q: Do the substitute parts support the same dimming functionality?

A: The TS19375CS RLG does not specify dimming capability in the provided parameters. The LT3756IMSE#PBF supports Analog and PWM dimming. The LT8391IUFD#PBF supports Analog and PWM dimming. Applications requiring dimming functionality benefit from these enhanced capabilities.

Q: What is the frequency compatibility between the original and substitute parts?

A: The TS19375CS RLG operates at 500kHz fixed frequency. The LT3756IMSE#PBF operates across 100kHz to 1MHz (programmable range). The LT8391IUFD#PBF operates across 150kHz to 650kHz (programmable range). Both substitutes can be configured to operate at or near the original 500kHz frequency.

Q: Are there temperature range differences affecting reliability?

A: The TS19375CS RLG operates from -20°C to 125°C. Both substitutes operate from -40°C to 125°C, providing extended low-temperature performance. This represents an improvement in cold-temperature capability suitable for wider environmental applications.

Q: What compliance certifications are maintained across all parts?

A: All three parts maintain ROHS3 compliance and REACH unaffected status. The LT8391IUFD#PBF includes automotive-grade qualification, providing additional quality assurance for automotive lighting applications. MSL ratings differ: TS19375CS RLG is MSL 3 (168 hours), while both substitutes are MSL 1 (Unlimited), indicating superior moisture resistance.