TLC5917IPWR

Overview

The TLC5917IPWR is an eight-channel constant-current LED sink driver manufactured by Texas Instruments. It features a serial interface for data and clock input, allowing daisy-chaining of multiple devices. The device provides individual channel control with 8-bit grayscale PWM dimming and a global blanking function. It operates within a supply voltage range of 3 V to 5.5 V and delivers up to 120 mA per output channel. The IC includes fault detection capabilities such as open-LED and short-to-ground/short-to-VLED diagnostics via an error flag output. It is housed in a TSSOP-16 package and supports operation temperatures from -40°C to +125°C.

Feature Summary

• Eight-channel constant-current sink driver with independent 8-bit PWM dimming control
• Serial interface supporting high-speed data transfer and multi-device daisy-chaining
• Integrated fault detection for open LEDs and shorts to ground or VLED
• Global blanking function for synchronized turn-off of all channels

Applications

• Portable indicator lighting systems
• Backlighting for LCD displays
• General-purpose LED status indication
• Low-power LED matrix displays

Procurement Notes

Verify the specific suffix 'G4' if environmental compliance documentation is required, as it indicates RoHS-compliant manufacturing. Confirm the TSSOP-16 package dimensions against PCB footprint requirements. Ensure the design accounts for thermal dissipation limits when driving maximum current across all channels simultaneously. Check for any recent product lifecycle notices regarding obsolescence or replacement recommendations from Texas Instruments.

Selection Notes

Select this component when eight individually controllable LED channels are needed without microprocessor GPIO overhead. The internal shift register reduces pin count compared to parallel interfaces. Consider the thermal performance in the TSSOP-16 package if high ambient temperatures or continuous full-load operation is expected. Compare against the TLC5916 if higher current drive or different packaging options are required.

Part Context

The TLC5917 belongs to Texas Instruments' family of dedicated LED drivers designed for portable applications. It simplifies LED control by integrating PWM generation and constant-current regulation. This model specifically targets applications requiring moderate current levels with precise brightness control. It complements other TI drivers like the TLC5916, offering similar functionality with variations in packaging and thermal characteristics.

Replacement Considerations

TLC5917IDR: SOIC-16 surface mount alternative with similar electrical characteristics. TLC5917IN: PDIP-16 through-hole package option for prototyping or legacy boards. TLC5917IPW: Non-G4 version of the TSSOP package; verify RoHS compliance requirements before substitution.