Datasheet > AL8861Q

AL8861Q

更新时间： 2023-12-26 09:00:12

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
15页	820K
描述
High Efficiency 40V 1.5A Automotive Grade Buck LED Driver

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AL8861Q 数据手册

AL8861Q

HIGH EFFICIENCY 40V 1.5A

AUTOMOTIVE GRADE BUCK LED DRIVER

Description

Pin Assignments

The AL8861Q is a hysteresis mode DC-DC step-down LED driver,

designed for driving single or multiple series of the connected LEDs

efficiently from a voltage source higher than the LED voltage. The

device can operate with an input supply from 4.5V to 40V and provide

an externally adjustable output current up to 1.5A for the MSOP-8EP

package. Depending upon supply voltage and external components,

this converter can provide up to 40W of output power.

MSOP-8EP

ISENSE

GND

VIN

N/C

GND

The AL8861Q integrates the power switch and a high-side output

current sensing circuit, which uses an external resistor to set the

nominal average output current.

VSET

Top View

Dimming can be realized by applying an external control signal to the

VSET pin. The VSET pin will accept either a DC voltage signal or a

PWM (pulse-width modulation) signal.

Applications



Automotive interior LED lamps

Automotive exterior LED lamps

The soft-start time can be adjusted by an external capacitor from the

VSET pin to the ground. Applying a voltage of 0.2V or lower to the

VSET pin can turn off the output and make the device enter into

standby state with low power consumption.

The AL8861Q is qualified to AEC-Q100 Grade 1 and is automotive

grade to support PPAPs.

Features



Wide Input-Voltage Range: 4.5V to 40V

Output Current Up to 1.5A

Internal 40V NDMOS Switch

Typical 5% Output Current Accuracy

Single Pin for On/Off and Brightness Control by DC Voltage or

PWM Signal



High Efficiency (> 95%)

LED Short-Circuit Protection

Inherent Open-Circuit LED Protection

Sense Resistor Short-Circuit Protection

Overtemperature Shutdown

Up to 1MHz Switching Frequency

Pb-Free MSOP-8EP Package

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

The AL8861Q is suitable for automotive applications

requiring specific change control; this part is AEC-Q100

qualified, PPAP capable, and manufactured in IATF16949

certified facilities.

https://www.diodes.com/quality/product-definitions/

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

1 of 15

www.diodes.com

July 2023

AL8861Q

Document number: DS41798 Rev. 4 - 2

12 3 4 5 6 7...15

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