LP3944ISQ

LED Driver IC Overview

The LP3944ISQ is an RGB/White/Blue 8-LED Fun Light Driver manufactured by Texas Instruments. It features a boost topology with a supply voltage range of 2.3 V to 5.5 V and a maximum output current of 25 mA per channel. The device operates in parallel LED configuration with a typical quiescent current of 0.35 mA. It supports I2C/SMBus dimming control and functions within an operating temperature range of -40°C to 85°C (TA). The component is housed in a WQFN-24 package.

LED Driver IC Feature Summary

• Independently drives eight LEDs using an internal precision oscillator for timing
• Provides diverse duty cycle control via two prescaler registers and two PWM registers
• Includes active low reset functionality for system management

LED Driver IC Applications

• Camera flash lighting systems
• RGB color mixing applications
• White LED illumination modules
• Blue LED accent lighting

LED Driver IC Procurement Notes

Verify the specific suffix designation, such as NOPB or NOPB.A, against the required datasheet revision and environmental specifications. Confirm that the WQFN-24 package dimensions align with the target PCB footprint. Ensure the selected variant meets the necessary moisture sensitivity level requirements for the intended manufacturing process.

LED Driver IC Selection Notes

Select this driver when independent control of up to eight LEDs is required without external timing components. Consider the 25 mA output limit per channel for load sizing. Evaluate the I2C interface compatibility with the host microcontroller. Verify that the boost topology suits the input voltage and LED forward voltage requirements.

LED Driver IC Part Context

This component belongs to the LP394x family of fun light drivers designed for multi-color LED applications. It serves as a compact solution for managing RGB, white, and blue LEDs in portable devices. The series emphasizes integrated timing and control to reduce external component count compared to discrete driver solutions.

LED Driver IC Replacement Considerations

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