Datasheet Diodes AL8861Q

ManufacturerDiodes
SeriesAL8861Q

High Efficiency 40V 1.5A Automotive Grade Buck LED Driver

Datasheets

Datasheet PDF, 666 Kb, Language: en, File uploaded: Jul 25, 2019, Pages: 15
Datasheet AL8861Q
High Efficiency 40V 1.5A Automotive Grade Buck LED Driver
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Detailed Description

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 MSOP-8EP package. Depending upon supply voltage and external components, this converter can provide up to 40W of output power.

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.

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 signal.

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.

Packaging

AL8861QMP-13
PackageMSOP-8EP

Parametrics

Parameters / ModelsAL8861QMP-13
AEC-Q100 Grade1
Automotive Compliant PPAPYes
Dimming (Analog)Yes
Dimming (PWM)Yes
Efficiency98 %
LED Current Accuracy5 %
Maximum Input Voltage40 V
Maximum LED Current1.5 A
Maximum Output Voltage36 V
Minimum Input Voltage4.5 V
Operating Temperature Range, °C-40 to 150 °
Qualified to AECQ10xYes
Sense Voltage100 mV
Switching Frequency Maximum1000 kHz
Topologies (Boost)No
Topologies (Buck)Yes
Topologies (Buck-Boost)No

Model Line

Series: AL8861Q (1)

Manufacturer's Classification