LT8500ITJ#PBF

LED Driver IC Overview

The LT8500ITJ#PBF is a pulse width modulation (PWM) generator featuring 48 independent channels. It operates with an input voltage range of 3V to 5.5V and utilizes a 56-pin TLA QFN EP package. Each channel includes an individually adjustable 12-bit PWM register providing 4096 steps and a 6-bit correction register offering ±50% adjustment in 64 steps. The device supports a 50MHz cascaded serial interface for high-speed data transmission.

LED Driver IC Feature Summary

• Provides 48 independent PWM channels for precise control
• Features 12-bit resolution with 4096-step adjustability per channel
• Includes 6-bit correction registers for fine-tuning output
• Supports 50MHz cascaded serial interface for rapid communication

LED Driver IC Applications

• Driving 48 resistor-ballasted LED strings from a VDD rail
• Implementing 48 digital-to-analog converter (DAC) channels using a single unit
• High-density LED lighting systems requiring individual channel control
• Industrial display backlights with multi-zone dimming requirements

LED Driver IC Procurement Notes

Verify the specific suffix (#PBF) indicates lead-free and RoHS compliance when ordering. Confirm the package type matches the required 56-pin TLA QFN EP footprint for PCB layout compatibility. Ensure the operating temperature range aligns with the intended application environment, as specifications may vary between industrial and extended temperature variants.

LED Driver IC Selection Notes

Select this component when a single IC must manage up to 48 distinct PWM outputs without external multiplexing. The 12-bit resolution is suitable for applications requiring smooth dimming curves. Consider the 50MHz interface speed if system latency is critical. Verify that the 3V to 5.5V supply range matches the available power rails in the design.

LED Driver IC Part Context

The LT8500 series is designed for complex LED driving applications where channel count and resolution are paramount. The ITJ variant specifies the industrial temperature grade, ensuring reliable operation across a wider thermal range compared to commercial options. It serves as a centralized controller for large-scale illumination arrays.

LED Driver IC Replacement Considerations

LT8500ETJ#PBF: Commercial temperature grade version with identical electrical specifications and pinout. LT8500ETJ#TRPBF: Tape and reel packaging option for the commercial grade variant. LT8500ITJ#TRPBF: Tape and reel packaging option for the industrial grade variant.