LP8553TLX/S7002758

LED Driver IC Overview

The LP8553TLX/S7002758 is a high-efficiency LED backlight driver designed for notebook applications. It integrates a boost converter with four adjustable current sinks. The device operates on a supply voltage range of 2.7V to 22V and supports an output voltage up to 40V. It utilizes a step-up (boost) topology and features programmable PWM resolution. Switching frequencies include 156kHz, 312kHz, 625kHz, and 1.25MHz. Dimming control is achieved via I²C and PWM interfaces. The component is housed in a 25-DSBGA package.

LED Driver IC Feature Summary

• Integrates a high-efficiency boost converter with four independent adjustable current sinks for precise LED channel control.
• Supports dual dimming methods including I²C digital interface and PWM analog input for flexible brightness management.
• Features programmable switching frequencies ranging from 156kHz to 1.25MHz to optimize external component size and efficiency.
• Designed specifically for high-efficiency white LED backlight driving in portable computing devices like notebooks.

LED Driver IC Applications

• White LED backlight drivers for notebook computers
• Portable electronic display illumination systems
• High-efficiency LED lighting solutions requiring multiple current sinks

LED Driver IC Procurement Notes

Verify the exact part marking and suffix against the manufacturer's official datasheet to ensure compatibility with your specific design requirements. Confirm that the 25-DSBGA package dimensions match your PCB footprint. Check for any specific ordering prefixes or suffixes that may indicate tape-and-reel packaging quantities or temperature grades. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

LED Driver IC Selection Notes

Select this component when designing notebook displays requiring integrated boost conversion and multi-channel LED current regulation. Consider its wide input voltage range and programmable frequency options for optimizing electromagnetic interference and efficiency. Evaluate the I²C and PWM dimming capabilities against your system's control architecture needs. Ensure the thermal performance of the 25-DSBGA package suits your enclosure constraints.

LED Driver IC Part Context

This part belongs to Texas Instruments' portfolio of power management integrated circuits focused on LED driving solutions. It is engineered to replace discrete boost converter and current sink designs, reducing board space and complexity. The LP8553 series is tailored for mobile computing markets where power efficiency and compact form factors are critical design parameters.

LED Driver IC Replacement Considerations

Consult Texas Instruments documentation for direct pin-to-pin replacements or functional equivalents within the LP855x family. Verify that alternative components support the same 25-DSBGA package and 40V output capability. Cross-reference electrical specifications such as switching frequency ranges and dimming interfaces to ensure system compatibility without redesign.

LED Driver IC FAQ

What dimming interfaces does the LP8553 support?

The LP8553 supports both I²C digital interface and PWM analog input for dimming control.

What is the maximum output voltage capability of this driver?

The device supports an output voltage up to 40V, suitable for driving multiple series-connected LEDs.

How many adjustable current sinks are integrated into the LP8553?

The LP8553 integrates four adjustable current sinks for independent LED channel control.