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
5秒后页面跳转
AO3401场效应管参数、引脚图、应用原理图
BT131可控硅参数及引脚图、工作原理详解
74LS32芯片参数、引脚图及功能真值表
全球首块英伟达H200交付 黄仁勋“送货上门”
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
