ASL3416SHN Enhanced three channel LED buck driver Rev. 6 16 September 2019 Product data sheet 1. Introduction The ASL3416SHN is a three channel buck mode LED driver IC delivering constant average DC current to LEDs independent of the input voltage. The ASL3416SHN 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 ASL3416SHN 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 1.5 A per channel. 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 ASL3416SHN buck driver gives a flexible system design which can be used to drive three LED strings with the same architecture. The ASL3416SHN provides an SPI interface for extensive control and diagnostic communication with an external microcontroller. The ASL3416SHN offers an adjustable hysteresis for optimizing external components as well as minimizing LED current ripple. In addition, the ASL3416SHN 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 include input under-voltage lockout and thermal shutdown when the junction temperature of the ASL3416SHN exceeds +175 C. It is housed in a very small HVQFN32 pin package with an exposed thermal pad and is designed to meet the stringent requirements of automotive applications. It is fully AEC Q100 grade 1 qualified. It operates over the ambient automotive temperature range of 40 C to +125 C. 1. The ASL3416 provides an accurate current over a 1 : 12.5 range. This range can be scaled up or down using external components. Depending on the operating conditions and component choices, output currents of min 30 mA and more than 3 A can be achieved.ASL3416SHN NXP Semiconductors Enhanced three channel LED buck driver 3. Features and benefits The ASL3416SHN is an automotive grade product that is AEC-Q100 grade 1 qualified. Operating ambient temperature range of 40 C to +125 C Wide operating input voltage range from +10 V to +80 V Able to drive up to 20 LEDs, wide operating LED voltage range regulated from 2.5 V to 70 V Output current of up to and above 1.5 A with high LED current accuracy of 5 % over the complete operating temperature range Output current programmable via SPI interface Read back programmed current via SPI Two output current ranges, programmable via SPI interface with 5 % accuracy Hysteretic converter Fast gate drive for high efficiency Programmable internal gate driver voltage regulator Support logic level and standard level FETs Integrated bootstrap diode PWM inputs for individual dimming of each channel Low Electro Magnetic Emission (EME) and high Electro Magnetic Immunity (EMI) Input voltage monitoring and input undervoltage protection Output voltage monitoring Control signal to enable the device Junction temperature monitoring via SPI Small package outline HVQFN32 Low quiescent current < 5 A at 25 C when EN = 0 Short-circuit and open-circuit output protection 4. Applications Automotive LED lighting Daytime running lights Position or park light Low beam High beam Turn indicator Fog light Cornering light Advanced front lighting ASL3416SHN All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2019. All rights reserved. Product data sheet Rev. 6 16 September 2019 2 of 38