TS19460CS RLG LED Driver IC Equivalent & Substitute Parts

Part Overview

The TS19460CS RLG is an AC DC offline switcher LED driver IC manufactured by Taiwan Semiconductor Corporation, designed for single-output applications in backlight, lighting, and signage systems. This device features step-down (buck) topology with analog and PWM dimming capabilities in an 8-SOP package. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

TS19460CS RLG

Taiwan Semiconductor CorporationIn Stock: 2090TS19460CS RLG Datasheet

Current PartRFQ

TS19705CX6 RFG

Taiwan Semiconductor CorporationIn Stock: 12980TS19705CX6 RFG Datasheet

MFR RecommendedRFQ

TS19450CS RLG

Taiwan Semiconductor CorporationIn Stock: 1218TS19450CS RLG Datasheet

Parametric EquivalentRFQ

LM3450AMTX/NOPB

Texas InstrumentsIn Stock: 3119LM3450AMTX/NOPB Datasheet

SimilarRFQ

LM3497MMX/NOPB

Texas InstrumentsIn Stock: 3835LM3497MMX/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TS19460CS RLG is determined by the following critical parameters: device type (AC DC offline switcher), topology (step-down buck converter), number of outputs (single output), dimming capability (analog and/or PWM), package compatibility, and operating temperature range. Substitute parts must maintain functional equivalence within these constraints.

The substitute parts are grouped into two categories:

Manufacturer Recommended Equivalent: TS19705CX6 RFG provides functional substitution with extended topology support (flyback, buck, and boost options) and active product status, though with reduced voltage supply range (9.5V to 40V) and lower maximum operating temperature (85°C TA).

Parametric Equivalent: TS19450CS RLG maintains identical electrical specifications and package format as the main part, with matching voltage supply range (8V to 450V), dimming capabilities (analog and PWM), and operating temperature range (-40°C to 150°C TJ).

Similar Alternatives: LM3450AMTX/NOPB and LM3497MMX/NOPB are Texas Instruments devices offering AC DC offline switcher functionality with different topologies and dimming methods, suitable for applications where topology flexibility is acceptable.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): TS19450CS RLG is the parametric equivalent, maintaining identical voltage supply range (8V to 450V), dimming capabilities (analog and PWM), operating temperature range (-40°C to 150°C TJ), and 8-SOIC package format. Both devices are obsolete; however, TS19450CS RLG has lower current inventory (1140 pcs) compared to TS19460CS RLG (2061 pcs).

For Active Product Substitution: TS19705CX6 RFG is the manufacturer-recommended substitute with active product status. This device supports multiple topologies (flyback, buck, boost) and maintains ROHS3 compliance and MSL-3 rating. Design consideration is required for the reduced voltage supply range (9.5V to 40V maximum) and lower operating temperature ceiling (85°C TA versus 150°C TJ).

For Alternative Topology Applications: LM3450AMTX/NOPB (Texas Instruments) offers flyback and boost topologies with internal switching capability and active product status. This device is suitable for designs where topology flexibility is acceptable, with the trade-off of reduced voltage supply range (8.5V to 20V) and different package format (16-TSSOP).

LM3497MMX/NOPB (Texas Instruments) provides step-down buck topology with triac dimming and active product status. This device is constrained to 8V to 12V supply range and is applicable only where triac dimming replaces analog/PWM dimming requirements.

All substitute options maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can TS19450CS RLG be used as a direct replacement for TS19460CS RLG?

A: Yes. TS19450CS RLG is a parametric equivalent with identical electrical specifications: 8V to 450V supply range, step-down buck topology, single output, analog and PWM dimming, 8-SOIC package, and -40°C to 150°C operating temperature range. Both devices are obsolete.

Q: What is the primary limitation of TS19705CX6 RFG as a substitute?

A: TS19705CX6 RFG has a reduced maximum supply voltage of 40V compared to 450V for the original part. This device is suitable only for applications operating within the 9.5V to 40V range. Additionally, the operating temperature maximum is 85°C (TA) versus 150°C (TJ) for the original device. Package format differs (SOT-23-6 versus 8-SOIC).

Q: Are the Texas Instruments alternatives (LM3450AMTX/NOPB and LM3497MMX/NOPB) direct replacements?

A: No. These devices offer different topologies and dimming methods. LM3450AMTX/NOPB supports flyback and boost topologies with analog dimming only, while LM3497MMX/NOPB supports step-down buck topology with triac dimming. Both have reduced voltage supply ranges and different package formats. These are suitable only where application requirements accommodate topology and dimming method changes.

Q: What is the impact of package differences between substitute parts?

A: Package differences require PCB layout redesign. TS19450CS RLG maintains the 8-SOIC format of the original part. TS19705CX6 RFG uses SOT-23-6 (6-pin), LM3450AMTX/NOPB uses 16-TSSOP, and LM3497MMX/NOPB uses 10-TFSOP/MSOP. Pin count and footprint changes necessitate schematic and layout modifications.

Q: Which substitute has the best long-term availability?

A: TS19705CX6 RFG has active product status with 12,881 pcs in inventory, providing superior long-term availability compared to the obsolete TS19460CS RLG and TS19450CS RLG. Texas Instruments alternatives (LM3450AMTX/NOPB with 3,041 pcs and LM3497MMX/NOPB with 3,800 pcs) also have active status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original TS19460CS RLG device.

Q: What is the difference between MSL-1 and MSL-3 ratings?

A: MSL-3 (original part and TS19705CX6 RFG) allows 168 hours of floor life before reflow, while MSL-1 (Texas Instruments devices) allows unlimited floor life. MSL-1 rated components provide greater handling flexibility in manufacturing environments.

Q: Can dimming method differences affect circuit design?

A: Yes. The original part supports analog and PWM dimming. TS19450CS RLG maintains this capability. TS19705CX6 RFG does not specify dimming type. LM3450AMTX/NOPB supports analog dimming only. LM3497MMX/NOPB supports triac dimming exclusively. Dimming method changes require control circuit redesign.