LM2794TL/NOPB

Overview

The LM2794TL/NOPB is a current-regulated switched capacitor LED driver manufactured by Texas Instruments. It features four independent output channels, each capable of delivering up to 80 mA. The device operates on a charge pump topology with an internal switching frequency range of 325 kHz to 675 kHz. It supports both analog and PWM brightness control methods. The IC functions within a supply voltage range of 2.7 V to 5.5 V and provides a regulated output voltage of 3.8 V. It is housed in a 14-DSBGA package and is rated for an operating temperature range from -30°C to +85°C.

Feature Summary

• Integrates four independent constant-current LED drivers within a single compact package.
• Supports dual dimming modes via analog voltage input and direct PWM signal interface.
• Utilizes an internal charge pump architecture to regulate LED current without external inductors.

Applications

• Backlight illumination for mobile devices
• General LED lighting solutions
• Portable electronic display systems

Procurement Notes

Verify the specific suffix designation when ordering, as the NOPB suffix indicates lead-free and RoHS-compliant manufacturing. Confirm that the required output current per channel aligns with the 80 mA maximum specification. Ensure the application circuit design accommodates the specified 325 kHz to 675 kHz switching frequency range to maintain stable operation within the 2.7 V to 5.5 V input voltage window.

Selection Notes

Select this component for designs requiring multiple LED channels driven from a low-voltage source. The integrated charge pump eliminates the need for bulky external inductors, simplifying layout. Consider the thermal performance of the DSBGA package under continuous load. Verify compatibility between the microcontroller's PWM signals and the driver's dimming input requirements.

Part Context

This part belongs to the LM2794 series of LED lighting drivers from Texas Instruments. It is functionally related to the LM2795, which offers similar capabilities but with different current specifications. The LM2794 series is designed specifically for applications requiring precise current regulation for white LEDs in portable consumer electronics.

Replacement Considerations

The LM2795TL is documented as a parameter-equivalent alternative. Verify pinout compatibility and current rating differences before substitution.