LT3965IFE#PBF

LED Driver IC Overview

The LT3965IFE#PBF is an octal matrix LED bypass switch designed for dimming individual LEDs in a string using a common current source. It operates from an input voltage range of 8V to 60V and supports output currents up to 500mA per channel. The device features eight individually addressable outputs, enabling precise control over LED brightness. Dimming is achieved through I²C or PWM interfaces, allowing for flexible integration into lighting systems. The component is housed in a 28-lead TSSOP package with an exposed pad for thermal management.

LED Driver IC Feature Summary

• Provides eight individually controllable bypass switches for precise LED dimming within a common current source architecture
• Supports digital control via I²C interface and analog/digital dimming through PWM input signals
• Operates across a wide supply voltage range suitable for various automotive and industrial lighting topologies

LED Driver IC Applications

• Automotive exterior and interior LED lighting systems requiring individual node control
• LED display backlights needing high-resolution brightness adjustment
• General illumination fixtures utilizing matrix LED configurations

LED Driver IC Procurement Notes

Verify the specific suffix (#PBF) indicates lead-free packaging compliant with RoHS standards. Confirm the package type matches the design requirements, as variations like #TRPBF exist. Ensure the ordering part number aligns with the required tape-and-reel or tube quantity if applicable. Cross-reference the manufacturer's latest datasheet for any updates on pinout or electrical characteristics before finalizing procurement.

LED Driver IC Selection Notes

Select this component when individual LED dimming is required without separate drivers for each node. It is suitable for applications where space constraints favor a single IC solution over multiple discrete switches. Consider the thermal performance of the TSSOP-EP package for high-current applications. Verify that the control system can support the necessary I²C or PWM signaling protocols for the desired dimming resolution.

LED Driver IC Part Context

The LT3965 belongs to Analog Devices' family of LED bypass switching devices. It complements other linear regulators and DC/DC converters by providing specialized control for LED strings. The device is often used in conjunction with constant current sources to manage complex lighting arrays efficiently.

LED Driver IC Replacement Considerations

LT3965IFE-1#PBF is a variant within the same series. Check datasheets for differences in internal topology or control logic between standard and -1 variants before substitution.

LED Driver IC FAQ

How does the LT3965 achieve dimming?

It achieves dimming by bypassing current around individual LEDs in a string, controlled via I²C commands or PWM signals.

What is the maximum output current per channel?

The maximum output current per channel is 500mA.