ASL45XASLX41 NXP

ASL4500SHN Four-phase boost converter Rev. 6 26 October 2017 Product data sheet 1. Introduction The ASL4500SHN is a highly integrated and flexible four-phase DC-to-DC boost converter IC. It has an SPI interface allowing control & diagnostic communication with an external microcontroller. It is designed primarily for use in automotive LED lighting applications and provides an optimized supply voltage for ASLx41xSHN Multi-channel LED Buck Driver. 2. General description The ASL4500SHN has a fixed frequency peak current mode control with parabolic/non-linear slope compensation. It can operate with input voltages from 5.5 V to 40 V. It can be configured via SPI for output voltages of up to 80 V, to power the LED buck driver IC. The ASL4500SHN is a four-phase converter which can have two independent outputs. The driver has the flexibility to be configured, via the SPI interface, as a single output converter, or with multiple combinations of number of outputs & phases. The ASL4500SHN boost converter can drive up to four external low-side N channel MOSFETs from an internally regulated adjustable supply. It can be used to drive either logic or standard level MOSFETs. The integrated SPI interface also allows for programming the supply under/over voltage range, output voltage range and DC-to-DC switching frequency. It enables the optimization of external components and flexibility for EMC design. This interface can also be used to provide diagnostic information such as the driver temperature. Additional features include protection against load dump transient voltages of up to 60 V and thermal shutdown when the junction temperature of the ASL4500SHN exceeds +175 C. The device is housed in a very small HVQFN32 pin package and is designed to meet the stringent requirements of automotive applications. It is fully AEC Q100 grade 1 qualified. It operates over the 40 C to +125 C ambient automotive temperature range.ASL4500SHN NXP Semiconductors Four-phase boost converter 3. Features and benefits The ASL4500SHN 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 +5.5 V to +40 V Output voltage programmable via SPI interface Multi-Phase Operation for higher power Up to four phases per output Up to two flexible output voltages with 3 % accuracy programmable via SPI Both output voltages can be controlled independently Fixed Frequency Operation via built-in oscillator Slope Compensation tracks the frequency and output voltage Programmable control loop compensation Fast high efficiency FET switching Programmable Internal Gate Driver Voltage Regulator Gate switching is halted when overvoltage on output is detected Supports both Logic Level and Standard Level FETs Low Electro Magnetic Emission (EME) and high Electro Magnetic Immunity (EMI) Output Voltage Monitoring Supply voltage measurement Control Signal to Enable the Device Read Back programmed voltage and frequency range via SPI Junction Temperature monitoring via SPI Small Package outline HVQFN32 Low Quiescent current <5 A at 25C when EN = 0 4. Applications Automotive LED lighting Low Beam High beam Daytime running lights Turn indicator Position or Park light Front fog light Cornering light 5. Ordering information Table 1. Ordering information Type number Package Name Description Version ASL4500SHN HVQFN32 plastic thermal enhanced very thin quad flat package no leads 32 terminals SOT617-12 body 5 5 0.85 mm ASL4500SHN All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2017. All rights reserved. Product data sheet Rev. 6 26 October 2017 2 of 41