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ASL3417SHN

Part Number	ASL3417SHN
Manufacturer	NXP
Description	Enhanced three channel LED buck driver
Published	Jul 9, 2020
Detailed Description	ASL3417SHN Enhanced three channel LED buck driver with limp-home Rev. 4 — 16 September 2019 Product data sheet 1. In...
Datasheet	ASL3417SHN PDF File

Overview

ASL3417SHN Enhanced three channel LED buck driver with limp-home Rev.
4 — 16 September 2019 Product data sheet 1.
Introduction The ASL3417SHN is a three channel buck mode LED driver IC with a Limp-home mode.
It delivers constant average DC current to LEDs independent of the input voltage.
The ASL3417SHN supports up to three output channels.
It means that with one driver IC 1, 2 or 3 LED strings can be driven independently of each other.
It provides a cost effective design solution, specifically targeting automotive exterior and interior lighting applications.
2.
General description The ASL3417SHN has a hysteretic buck DC-to-DC topology.
With input voltages from 10 V to 80 V, it allows maximum flexibility on output voltages for each channel, enabling applications with up to 20 LEDs.
It also provides an output current of up to and above 1.
5 A per channel.
1 Furthermore, two output channels can be connected together to provide an even higher current.
It drives an external high-side N channel MOSFET from an internally regulated adjustable supply.
The ASL3417SHN buck driver gives a flexible system design which can be used to drive three LED strings with the same architecture.
The ASL3417SHN provides an SPI interface for extensive control and diagnostic communication with an external microcontroller.
Furthermore, the ASL3417SHN integrates a customer programmable Limp-home mode.
It allows configurable operation in Limp-home mode in case SPI communication with the microcontroller has failed.
The ASL3417SHN offers an adjustable hysteresis for optimizing external components as well as minimizing LED current ripple.
In addition, the ASL3417SHN provides an output voltage of up to 70 V.
It has a measurement capability that can be used to identify LED open or short circuit conditions.
The microcontroller can read this voltage and use it to detect open or short circuit conditions.
There are also additional diagnostic features such as current reached status.
Additional features ...

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ASL3417SHN Enhanced three channel LED buck driver - NXP

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