LM2751SDX-A/NOPB

Overview

The LM2751SDX-A/NOPB is a regulated switched capacitor white LED driver from Texas Instruments. It operates with an input voltage range of 2.8V to 5.5V and delivers up to 150mA output current. The device supports 2x and 1.5x charge pump topologies, achieving a maximum output voltage of 4.5V. It functions at a fixed switching frequency of 725kHz within an operating temperature range of -40°C to +85°C. Packaged in a WSON-10 footprint, this single-output IC provides low ripple for efficient LED illumination.

Feature Summary

• Regulated switched capacitor architecture supporting 2x and 1.5x gain modes
• Fixed frequency operation ensuring stable performance
• Low input and output voltage ripple characteristics

Applications

• White LED backlighting systems
• Portable electronic device illumination
• General LED lighting applications

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm revision status and availability. Ensure the WSON-10 package dimensions align with PCB layout requirements. Confirm RoHS compliance details through the latest datasheet. Cross-reference the part number with authorized distributors to validate authenticity and supply chain integrity before procurement.

Selection Notes

Select this component when a compact, single-channel solution is required for driving white LEDs from a single-cell lithium battery or similar power source. The fixed 725kHz frequency simplifies filter design compared to variable-frequency alternatives. Consider the 150mA current limit and 4.5V output ceiling to ensure compatibility with the target LED string configuration and thermal management constraints.

Part Context

This part belongs to the LM2751 series of LED drivers. It is distinct from the LM2750, which is a boost converter, and other variants like the LM27951. The LM2751 specifically targets applications requiring regulated constant current drive via switched capacitor technology, offering a space-efficient alternative to inductor-based solutions in portable devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Verify functional equivalence carefully if considering alternatives, as parameters such as switching frequency, current limits, and package dimensions may differ significantly across manufacturers.

FAQ

What is the switching frequency of the LM2751SDX-A/NOPB?

The device operates at a fixed switching frequency of 725kHz.

Does the LM2751 support PWM dimming?

Yes, the component supports PWM dimming functionality for brightness control.