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AL8861Q PDF预览

AL8861Q

更新时间: 2024-11-25 14:56:03
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

AL8861Q 数据手册

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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  
1
2
3
4
8
VIN  
N/C  
LX  
7
6
EP  
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  
5
LX  
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  
© 2023 Copyright Diodes Incorporated. All Rights Reserved.  
Document number: DS41798 Rev. 4 - 2  

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