Datasheet AL8862Q (Diodes)
| Manufacturer | Diodes |
| Description | Automotive Grade 55V 1A Step-Down Converter |
| Pages / Page | 16 / 1 — AL8862Q. AUTOMOTIVE GRADE 55V 1A STEP-DOWN CONVERTER. Description. Pin … |
| File Format / Size | PDF / 995 Kb |
| Document Language | English |
AL8862Q. AUTOMOTIVE GRADE 55V 1A STEP-DOWN CONVERTER. Description. Pin Assignments. (Top View). Applications. Features
Model Line for this Datasheet
Text Version of Document
AL8862Q AUTOMOTIVE GRADE 55V 1A STEP-DOWN CONVERTER Description Pin Assignments (Top View)
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 SET 1 8 CTRL output current up to 1A. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating GND 2 7 GND the need for ballast resistors. The AL8862Q switches at frequency up EP to 1MHz. This allows the use of smaller size external components, FAULT 3 6 SW hence minimizing the PCB size. VIN 4 5 SW The AL8862Q integrates the power switch and a high-side output current sensing circuit. Maximum output current of AL8862Q is set SO-8EP via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM
Applications
signal at the CTRL input pin. The soft-start time can be adjusted Automotive Interior LED Lamps using an external capacitor from the CTRL pin to the ground. An Automotive Exterior LED Lamps input voltage of 0.3V or lower at CTRL pin will shut down the power switch. The AL8862Q is qualified to AEC-Q100 Grade 1 and is automotive grade to support PPAPs.
Features
Wide Input Voltage Range: 5V to 55V 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 Over Temperature Shutdown Up to 1MHz Switching Frequency SO-8EP 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. AL8862Q 1 of 16 December 2019 Document number: DS42199 Rev. 3 - 2
www.diodes.com
© Diodes Incorporated
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 SET 1 8 CTRL output current up to 1A. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating GND 2 7 GND the need for ballast resistors. The AL8862Q switches at frequency up EP to 1MHz. This allows the use of smaller size external components, FAULT 3 6 SW hence minimizing the PCB size. VIN 4 5 SW The AL8862Q integrates the power switch and a high-side output current sensing circuit. Maximum output current of AL8862Q is set SO-8EP via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM
Applications
signal at the CTRL input pin. The soft-start time can be adjusted Automotive Interior LED Lamps using an external capacitor from the CTRL pin to the ground. An Automotive Exterior LED Lamps input voltage of 0.3V or lower at CTRL pin will shut down the power switch. The AL8862Q is qualified to AEC-Q100 Grade 1 and is automotive grade to support PPAPs.
Features
Wide Input Voltage Range: 5V to 55V 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 Over Temperature Shutdown Up to 1MHz Switching Frequency SO-8EP 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. AL8862Q 1 of 16 December 2019 Document number: DS42199 Rev. 3 - 2
www.diodes.com
© Diodes Incorporated
