LP3933SL/NOPB

LED Driver IC Overview

The LP3933SL/NOPB is a high-performance LED driver IC manufactured by Texas Instruments, designed for mobile and portable applications. It integrates a DC-DC boost converter with 12 independent output channels to drive multiple LEDs efficiently. The device supports PWM dimming control for precise brightness regulation and includes a dedicated flash mode capable of delivering up to 120mA per channel. Operating at a switching frequency of 1MHz, it features an internal switch and requires a supply voltage between 2.65V and 2.9V. The output voltage is regulated at 5.3V. Packaged in a compact 32-TLGA (5.5x4.5mm) surface-mount footprint, it operates within a temperature range of -40°C to 85°C.

LED Driver IC Feature Summary

• Integrates a step-up DC-DC converter with 12 independent LED output channels for efficient power management.
• Supports PWM dimming control for accurate brightness adjustment across all channels.
• Includes a high-current flash mode capability to drive LEDs at elevated currents for camera applications.

LED Driver IC Applications

• Mobile phone backlighting systems
• Camera flash illumination modules
• Portable electronic device lighting

LED Driver IC Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm package integrity and pin alignment against the 32-TLGA specification. Check datasheet revisions for any functional updates. Ensure compatibility with existing PCB footprints and thermal management requirements. Validate supply chain documentation for RoHS compliance history.

LED Driver IC Selection Notes

Select this component when designing multi-LED backlight or flash circuits requiring integrated boost regulation. Consider the 12-channel architecture for uniform current distribution. Evaluate the 1MHz switching frequency for EMI constraints and passive component sizing. Assess the 2.65V–2.9V input range against battery profiles. Verify that the 32-TLGA package fits within spatial constraints of the target enclosure.

LED Driver IC Part Context

The LP3933 series represents Texas Instruments' solution for complex LED driving in handheld devices. The LP3933SL/NOPB variant specifically targets applications needing both ambient backlighting and intense flash illumination from a single IC. It consolidates power conversion and channel control, reducing external component count compared to discrete solutions. This integration aids in minimizing board space and improving system reliability in densely packed mobile designs.

LED Driver IC Replacement Considerations

No officially confirmed substitute part numbers are documented in public sources. As the component is marked obsolete, engineering teams should evaluate newer Texas Instruments LED drivers with similar channel counts and boost topology. Cross-reference electrical parameters such as output current limits and operating voltage ranges before transitioning to alternative components.

LED Driver IC FAQ

What is the maximum current supported in flash mode?

The LP3933SL/NOPB supports a flash current of up to 120mA per channel.

Does the IC include an internal switch?

Yes, the LP3933SL/NOPB contains an internal switch as part of its boost converter topology.

What is the operating temperature range?

The device is rated for operation from -40°C to 85°C (TA).