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LT3476 Datasheet PDF

Part Series:
LT3476 Series
Category:
LED Drivers
Description:
LED Driver 8Segment 3.3V/5V/9V/12V/15V Automotive 38Pin QFN EP Tube
Updated Time: 2023/01/13 03:06:03 (UTC + 8)

LT3476 LED Drivers Datasheet PDF

LT3476 Datasheet PDF LED Drivers

14 Pages
Linear Technology
LED Driver 8Segment 3.3V/5V/9V/12V/15V Automotive 38Pin QFN EP T/R
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LED DRVR 8Segment 3.3V/5V/9V/12V/15V Automotive 38Pin QFN EP
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ADI
High Current Quad Output LED Driver
14 Pages
Linear Technology
LED DRVR 8Segment 3.3V/5V/9V/12V/15V Automotive 38Pin QFN EP T/R

LT3476EUHF#PBF - Linear Technology Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Frequency
200kHz ~ 2MHz
Number of Pins
38 Pin
Case/Package
QFN-38
Number of Outputs
4 Output
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LT3476EUHF#PBF - Linear Technology Function Overview

The LT3476EUHF#PBF is a High Current Quad Output LED Driver designed to operate as a constant-current source for driving high current LEDs. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 200kHz and 2MHz to optimize efficiency and external component size. The LT3476 senses output current at the high side of the LED. High side current sensing is the most flexible scheme for driving LEDs, allowing buck, boost or buck-boost configurations. Each current monitor threshold is trimmed to within 2.5% at the full scale of 105mV. With an external sense resistor, the user programs the output current range of each channel. Each of the four regulators is independently operated by that channel"s PWM signal. This PWM feature allows precise adjustment of the colour mixing or dimming ratio of LED source. Dimming ratios up to 1000:1 can be achieved.
True colour PWM™ dimming delivers up to 5000:1 dimming ratio (in boost configuration)
LED current regulation with high-side sense
VADJ pin accurately sets LED current sense threshold over range 10 to 120mV
Four independent driver channels with 1.5A, 36V internal NPN switches
200kHz to 2MHz Frequency adjust pin
High efficiency conversion (up to 96%)
Open LED protection
Low shutdown current (< 10µA)
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