Datasheet Diodes AL8862Q


Automotive Grade 55V 1A Step-Down Converter


Datasheet AL8862Q
PDF, 995 Kb, Language: en, File uploaded: Dec 20, 2019, Pages: 16
Automotive Grade 55V 1A Step-Down Converter
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Detailed Description

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.

The AL8862Q integrates the power switch and a high-side output current sensing circuit. Maximum output 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 ground. An input voltage of 0.3V or lower at CTRL pin will shut down the power switch.

The AL8862Q has been qualified to AEC-Q100 Grade 1 and is Automotive Grade supporting PPAPs.




Parameters / ModelsAL8862QSP-13
AEC-Q100 Grade1
Automotive Compliant PPAPYes
Dimming (Analog)Yes
Dimming (PWM)Yes
Efficiency98 %
LED Current Accuracy4 %
Maximum Input Voltage55 V
Maximum LED Current1 A
Maximum Output Voltage50 V
Minimum Input Voltage5 V
Operating Temperature Range, °C-40 to 125 °
Qualified to AECQ10xYes
Sense Voltage100 mV
Switching Frequency Maximum1000 kHz
Topologies (Boost)Yes
Topologies (Buck)No
Topologies (Buck-Boost)No

Model Line

Series: AL8862Q (1)

Manufacturer's Classification