LM3430SD/NOPB

Overview

The LM3430SD/NOPB is a DC-DC controller designed for LED backlighting applications, manufactured by Texas Instruments. It supports SEPIC and boost topologies to drive LEDs from a single-cell lithium-ion battery or multi-cell battery pack. The device operates with an internal switching frequency of 1.115 MHz and accepts PWM dimming signals for brightness control. It is housed in a compact 12-WSON package measuring 3x3 mm, suitable for space-constrained portable electronics.

Feature Summary

• Supports SEPIC and boost converter topologies for flexible LED driving configurations
• Accepts external PWM dimming signals for precise brightness adjustment
• Integrated high-side current sense amplifier for accurate LED regulation

Applications

• LED backlighting for mobile phones
• LED backlighting for personal digital assistants (PDAs)
• LED backlighting for handheld gaming devices

Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the package marking code matches the 12-WSON form factor. Ensure the ordering part number aligns with the required tape and reel quantity specifications provided in the official datasheet.

Selection Notes

Select this component when designing systems requiring a single-inductor solution for both boost and SEPIC operations. It is appropriate for applications needing wide input voltage ranges driven by single or multi-cell batteries. Consider the 1.115 MHz fixed frequency for EMI management and component size optimization in portable designs.

Part Context

This part belongs to the LM3430 family of LED driver controllers from Texas Instruments. It is specifically engineered for portable consumer electronics where board space is limited. The device integrates necessary control logic for constant current regulation without requiring external microcontrollers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.