TLC6946DBQR Equivalent & Substitute Parts

Part Overview

The TLC6946DBQR is a linear LED driver IC manufactured by Texas Instruments, designed for LED lighting applications. This 16-output constant current driver operates across a 3V to 5.5V supply range and is housed in a 24-SSOP package. The device is currently in active production status with ROHS3 compliance and extensive inventory availability (82,560 units in stock). Substitute parts are identified when equivalent functional requirements exist within the same output count, supply voltage compatibility, and surface mount packaging constraints.

Substiute Parts

TLC6946DBQR

Texas InstrumentsIn Stock: 82643TLC6946DBQR Datasheet

Current PartRFQ

PCA9532BS,118

NXP USA Inc.In Stock: 100184PCA9532BS,118 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLC6946DBQR is determined by the following critical parameters:

• Number of Outputs: Must equal 16 channels
• Supply Voltage Range: Must support minimum 3V and maximum 5.5V operation
• Mounting Type: Must be surface mount compatible
• Operating Temperature Range: Must support -40°C to 85°C
• Package Classification: Must be compatible with 24-pin surface mount footprints

The PCA9532BS,118 qualifies as a substitute based on matching output count (16), overlapping supply voltage range (2.3V to 5.5V encompasses the 3V to 5.5V requirement), identical operating temperature range, and surface mount packaging in a 24-pin configuration. Both devices maintain active product status and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the TLC6946DBQR and PCA9532BS,118 maintain active product status with full ROHS3 compliance and REACH unaffected certification. Selection between these devices should be based on:

• Package Footprint: The TLC6946DBQR uses 24-SSOP (0.154" width), while the PCA9532BS,118 uses 24-HVQFN (4x4). PCB layout and routing requirements will determine compatibility.
• Supply Voltage Margin: The PCA9532BS,118 supports operation down to 2.3V, providing additional margin below the TLC6946DBQR's 3V minimum.
• Moisture Handling: The PCA9532BS,118 features MSL 1 (unlimited), compared to the TLC6946DBQR's MSL 3 (168 hours), affecting storage and assembly conditions.
• Inventory Availability: Both devices maintain substantial stock levels (82,560 and 100,100 units respectively).

Frequently Asked Questions (FAQ)

Q: Can the PCA9532BS,118 directly replace the TLC6946DBQR on an existing PCB?

A: Direct PCB replacement is not possible due to package differences. The TLC6946DBQR uses 24-SSOP packaging while the PCA9532BS,118 uses 24-HVQFN (4x4). Different footprints, pin pitch, and land patterns require PCB redesign.

Q: What are the key functional differences between these devices?

A: The TLC6946DBQR is a linear constant current driver without dimming capability. The PCA9532BS,118 is a power switch topology with I2C-controlled dimming and 25mA per-channel current rating. Functional requirements must align with application needs.

Q: Are both devices suitable for the same supply voltage range?

A: Both devices operate within the 3V to 5.5V range. The PCA9532BS,118 extends operation down to 2.3V, providing additional flexibility for lower voltage applications.

Q: What is the significance of the MSL rating difference?

A: The TLC6946DBQR (MSL 3) requires controlled storage conditions with a 168-hour floor life limit after moisture exposure. The PCA9532BS,118 (MSL 1) has unlimited floor life, reducing handling and storage constraints during manufacturing.

Q: Are both devices RoHS compliant?

A: Yes, both the TLC6946DBQR and PCA9532BS,118 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.