TLC5948APWP LED Driver IC Equivalent & Substitute Parts

Part Overview

The TLC5948APWP is a 16-output linear LED driver IC manufactured by Texas Instruments, designed for signage applications. This active product operates across a 3V to 5.5V supply range with 60mA per-channel output capability in a 24-HTSSOP surface mount package. The device integrates an internal switch and shift register topology for efficient LED control. Finding equivalent or substitute parts may be necessary due to inventory constraints, lead time requirements, or specific application demands while maintaining functional compatibility.

Substiute Parts

TLC5948APWP

Texas InstrumentsIn Stock: 2216TLC5948APWP Datasheet

Current PartRFQ

PCA9955BTW/Q900J

NXP USA Inc.In Stock: 12169PCA9955BTW/Q900J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC5948APWP is evaluated based on the following critical parameters that define functional compatibility:

Core Compatibility Criteria:

• Number of outputs: 16 channels (mandatory match)
• Supply voltage range: 3V to 5.5V (must encompass or match)
• Output current per channel: 60mA minimum (equal or greater)
• Type classification: Linear driver (mandatory match)
• Internal switch integration: Yes (mandatory match)
• Operating temperature range: -40°C to 85°C (must match or exceed)
• RoHS and regulatory compliance: ROHS3 Compliant (mandatory match)

The PCA9955BTW/Q900J from NXP USA Inc. qualifies as a substitute part because it maintains all mandatory parameters while offering enhanced specifications in output current (65mA vs. 60mA) and improved moisture sensitivity rating (MSL 1 vs. MSL 2). Both devices operate within identical supply voltage ranges and temperature specifications, ensuring direct functional compatibility in signage and LED control applications.

Parameter Comparison

Engineering Selection Recommendations

Both the TLC5948APWP and PCA9955BTW/Q900J maintain active product status with full ROHS3 compliance and REACH unaffected regulatory standing. Selection between these parts should be based on the following engineering considerations:

TLC5948APWP is the primary choice when the 24-HTSSOP package footprint is a design requirement or when the 60mA per-channel specification is sufficient for the application.

PCA9955BTW/Q900J is suitable as a substitute when higher per-channel current capacity (65mA) is beneficial, when the 28-HTSSOP package is compatible with PCB layout, or when the superior moisture sensitivity rating (MSL 1 with unlimited shelf life) is advantageous for long-term storage or humid environments. The automotive-grade qualification of the PCA9955BTW/Q900J provides additional reliability assurance for demanding applications.

Both devices operate identically within the specified -40°C to 85°C temperature range and 3V to 5.5V supply voltage window, ensuring thermal and electrical compatibility in equivalent circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the PCA9955BTW/Q900J directly replace the TLC5948APWP on an existing PCB?

A: Direct PCB replacement requires package compatibility verification. The TLC5948APWP uses a 24-HTSSOP package while the PCA9955BTW/Q900J uses a 28-HTSSOP package. Both packages share the same 0.173" width and 4.40mm pitch, but the 28-pin variant has additional pins. PCB layout modification may be necessary. Electrical functionality is compatible when pin assignments align with your circuit design.

Q: Are the supply voltage requirements identical between these parts?

A: Yes. Both the TLC5948APWP and PCA9955BTW/Q900J operate across the identical 3V to 5.5V supply voltage range. No power supply modifications are required when substituting between these devices.

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

A: The TLC5948APWP carries MSL 2 (1 Year shelf life), while the PCA9955BTW/Q900J carries MSL 1 (Unlimited shelf life). MSL 1 indicates superior moisture resistance and longer storage capability without requiring baking procedures. For applications with extended inventory holding periods or storage in humid environments, the PCA9955BTW/Q900J offers practical advantages.

Q: Do both parts support the same number of LED outputs?

A: Yes. Both devices provide 16 independent output channels with linear driver topology and integrated internal switches. Output channel count and control architecture are functionally equivalent.

Q: What is the practical difference between 60mA and 65mA per-channel output?

A: The PCA9955BTW/Q900J provides 5mA additional current capacity per channel compared to the TLC5948APWP. This allows driving slightly brighter LEDs or supporting marginally higher load currents. For applications already designed around 60mA per channel, both parts perform identically. For new designs, the higher current capability of the PCA9955BTW/Q900J provides additional design margin.

Q: Are both parts suitable for signage applications?

A: The TLC5948APWP is explicitly specified for signage applications. The PCA9955BTW/Q900J is specified for backlight applications with automotive-grade qualification. Both devices function as 16-output linear LED drivers and are suitable for signage use cases based on their core specifications and active product status.