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LT3743 Datasheet PDF

Part Series:LT3743 Series
Category:LED Drivers
Description:LED Driver 1Segment 9V/12V/15V/18V/24V Automotive 28Pin QFN EP Tube
Document:LT3743EUFD#PBF Datasheet PDF (28 Pages)

LT3743 LED Drivers Datasheet PDF

LT3743 Datasheet PDF LED Drivers

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LT3743EUFD#PBF - Linear Technology Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Frequency
200kHz ~ 1MHz
Number of Pins
28 Pin
Case/Package
QFN-28
Number of Outputs
1 Output
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LT3743EUFD#PBF - Linear Technology Function Overview

The LT3743EUFD#PBF is a fixed frequency synchronous step-down DC/DC Controller designed to drive high current LEDs. The average current mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN - 2V). LED dimming is achieved through analogue dimming on the CTRL_L, CTRL_H and CTRL_T pins and with PWM dimming on the PWM and CTRL_SEL pins. Through the use of externally switched load capacitors, the LT3743 is capable of changing regulated LED current levels within several µs, providing accurate, high speed PWM dimming between two current levels. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin. Additional features include voltage regulation and over-voltage protection set with a voltage divider from the output to the FB pin. Overcurrent protection is provided and set by the CTRL_H pin.
PWM dimming provides up to 3000:1 dimming ratio
CTRL_SEL Dimming provides up to 3000:1 dimming ratio between any current
Three-state current control for colour mixing
±6% Current regulation accuracy
Average current mode control
2µs Maximum recovery time between any current regulation state
<1µA Shutdown current
Output voltage regulation and open-LED protection
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