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AL8862Q

更新时间： 2024-11-06 14:54:35
品牌 Logo 应用领域
美台 - DIODES /
页数 文件大小 规格书
17页 1628K
描述
AUTOMOTIVE GRADE 55V 1A STEP-DOWN CONVERTER

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AL8862Q 数据手册

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AL8862Q  
AUTOMOTIVE GRADE 55V 1A STEP-DOWN CONVERTER  
Description  
Pin Assignments  
The AL8862Q is a step-down DC/DC converter designed to drive  
LEDs with a constant current. The AL8862Q operates with an input  
supply voltage from 5V to 55V and provides an externally adjustable  
output current up to 1A. Series connection of the LEDs provides  
identical LED currents resulting in uniform brightness and eliminating  
the need for ballast resistors. The AL8862Q switches at frequency up  
to 1MHz. This allows the use of smaller size external components,  
hence minimizing the PCB size.  
(Top View)  
8
CTRL  
GND  
SET  
1
2
3
4
GND  
7
6
5
EP  
SO-8EP  
EP  
SW  
SW  
FAULT  
VIN  
The AL8862Q integrates the power switch and a high-side output  
current sensing circuit. The LED current of AL8862Q is set via an  
external resistor connected between the VIN and SET input pins.  
Dimming is achieved by applying either a DC voltage or a PWM  
signal at the CTRL input pin. The soft-start time can be adjusted using  
an external capacitor from the CTRL pin to the ground. An input  
voltage of 0.3V or lower at CTRL pin will shut down the power switch.  
VIN  
8
7
6
5
SW  
1
2
3
4
The AL8862Q includes an open-drain fault output to indicate open  
circuit across LED string, short-circuit across current sense resistor  
and overtemperature conditions.  
FAULT  
GND  
CTRL  
NC  
GND  
SET  
The AL8862Q is available in SO-8EP and V-DFN3030-8/SWP (Type  
A) packages.  
V-DFN3030-8/SWP (Type A)  
The AL8862Q is qualified to AEC-Q100 Grade 1 and is automotive  
grade to support PPAPs.  
Applications  
Features  
Wide Input Voltage Range: 5V to 55V  
Automotive interior LED lamps  
Automotive exterior LED lamps  
Output Current up to 1A  
Internal 55V NDMOS Switch  
Typical 4% Output Current Accuracy  
Single Pin for On/Off and Brightness Control by DC Voltage or  
PWM Signal  
High Efficiency (Up to 97%)  
Fault Status Indication for Abnormal Operation  
LED Short-Circuit Protection  
Inherent Open-Circuit LED Protection  
Current-Sense Resistor Short-Circuit Protection  
Overtemperature Shutdown  
Up to 1MHz Switching Frequency  
SO-8EP and V-DFN3030-8/SWP (Type A) Packages Available  
in Green Molding Compound (No Br, Sb)  
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  
Halogen and Antimony Free. “Green” Device (Note 3)  
The AL8862Q is suitable for automotive applications  
requiring specific change control; this part is AEC-Q100  
qualified, PPAP capable, and manufactured in IATF 16949  
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 17  
www.diodes.com  
July 2023  
AL8862Q  
© 2023 Copyright Diodes Incorporated. All Rights Reserved.  
Document number: DS42199 Rev. 5 - 2  
1234567...17

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