TLC5940NTG4

Overview

The TLC5940NTG4 is a 16-channel constant-current sink LED driver manufactured by Texas Instruments in a 28-pin PDIP package. It provides individually adjustable 4096-step grayscale PWM brightness control for each channel, supporting up to 120 mA output current per channel with a maximum supply voltage of 5.5 V and an output voltage rating of 17 V. The device features EEPROM-based dot correction to compensate for manufacturing variations, ensuring uniform LED brightness across all channels. Operating within a temperature range of -40°C to +85°C, it integrates fault detection capabilities including open and short circuit monitoring. This component is designed for high-precision LED lighting applications requiring detailed color and intensity management.

Feature Summary

• Provides 16 independent constant-current sink channels with individual 4096-step grayscale PWM control
• Integrates non-volatile EEPROM memory for storing dot correction data to ensure uniform LED brightness
• Includes built-in fault detection mechanisms for identifying open and short circuits in LED connections

Applications

• High-resolution LED display panels requiring precise grayscale control
• Architectural and decorative LED lighting systems demanding uniform brightness
• Automotive interior lighting modules with specific color rendering requirements

Procurement Notes

Verify the exact part number suffix against official Texas Instruments documentation to confirm package type and temperature grade. Ensure that the procurement source provides valid traceability for the EEPROM programming status if pre-programmed units are required. Confirm compatibility with the host controller's interface signals before finalizing orders.

Selection Notes

Select this component when 16-channel constant-current driving with high-resolution grayscale control is necessary. The PDIP package is suitable for through-hole mounting applications where space constraints are less critical than in surface-mount designs. Consider the 120 mA per channel capability for standard LED arrays rather than high-power single emitters.

Part Context

This device belongs to the TLC5940 family of LED drivers from Texas Instruments, which are widely used in professional lighting and display applications. The NTG4 variant specifically denotes the 28-lead plastic dual in-line package (PDIP) configuration, distinguishing it from surface-mount alternatives like the PWPR or PWP variants while maintaining identical electrical functionality.

Replacement Considerations

Direct substitutes include other members of the TLC5940 family such as the TLC5940PWPR or TLC5940PWP, provided the PCB footprint supports the respective package type. Cross-referencing with the TLC5941 series may be considered if additional error flag outputs are required, though pinout differences must be evaluated.