VLMS31J1K2-GS18

Current - Test:	10mA
Base Part Number:	VLM31
Height (Max):	1.85mm
Size / Dimension:	3.00mm L x 2.80mm W
Supplier Device Package:	2-PLCC
Package / Case:	2-SMD, J-Lead
Features:	--
Wavelength - Peak:	643nm
Wavelength - Dominant:	630nm
Mounting Type:	Surface Mount
Viewing Angle:	120°
Series:	VLM3
Voltage - Forward (Vf) (Typ):	1.9V
Lens Style/Size:	Round with Flat Top, 2.40mm
Millicandela Rating:	8mcd
Lens Transparency:	Clear
Lens Color:	--
Color:	Red
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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IntroductionVLMS31J1K2-GS18 is a device used in LED Indication - Discrete applications. It is a low current, cost-effective, low profile, reliable and non-polarized infrared (IR) point-of-load discrete LED driver that provides built-in thermal protection and fault detection features. It is specifically designed to be used with multi-color, discrete LEDs with RGB configuration in space-limited applications, such as keyboards, displays, and gaming consoles.FeaturesThe VLMS31J1K2-GS18 device offers a number of features to enable an efficient and reliable operation. These features include:•Low start-up voltage: The device has a low start-up voltage of 2.5V so that it can be used with a wide range of inputs.•Thermal protection: The device has built-in thermal protection to ensure a reliable and efficient operation.•Fault detection: The device includes fault detection features to detect any overcurrent, overvoltage, and undervoltage conditions.•Low output voltage: The device has a low output voltage of 2.5V, making it suitable for low power applications.•Low profile: The device is designed with a low profile as it has a height of 2.5mm.Working PrincipleThe VLMS31J1K2-GS18 device works on the principle of pulse width modulation (PWM). It enables the user to control the intensity of the LED by varying the duty cycle of the PWM input signal. The device is capable of providing a high output current of up to 10mA with a minimum pulse width of 300ns. The device is designed to accept a TTL compatible rising or falling edge PWM input frequency of up to 5KHz.The device is designed to be connected to a bipolar LED array with just two wires - one for the power and one for the PWM input. The device is capable of driving up to five LEDs with equal current, or up to three LEDs with variable current, all depending on the programming. The device is designed such that it is immune to external capacitive loads, which permits long cables to be used without the risk of false triggering of the device.ConclusionThe VLMS31J1K2-GS18 device is a cost-effective, low profile, reliable, and non-polarized infrared (IR) point-of-load discrete LED driver. It enables the user to control the intensity of the LED with a PWM input signal and is capable of providing a high output current of up to 10mA. The device is designed to accept a TTL compatible rising or falling edge PWM input and is immune to external capacitive loads, allowing for long cables to be used. The device enables an efficient and reliable operation as it has built-in thermal protection and fault detection features. It is specifically designed to be used with multi-color, discrete LEDs with RGB configuration in space-limited applications, such as keyboards, displays, and gaming consoles.

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