The TME catalogue includes a wide range of infrared LEDs. The noticeable market trend in favour of the miniaturisation of devices forces manufacturers to search for solutions combining high power (ca. 1W) with a small size of SMD components. For this reason, today we present one of such solutions: PK2S-series IR LEDs, which are the smallest SMD power diodes offered by ProLight.
Applications
The radiation with the wavelength of 840nm to 960nm (depending on the model), emitted by PK2S series LEDs, is used as illumination recorded by specially adapted cameras. These devices make it possible to carry out observation in (apparent) darkness, e.g. in closed-circuit television systems (CCTV) or using the so-called camera traps (unmanned, motion-sensor-triggered cameras). In the automotive industry, miniaturised sources of infrared light can be used as non-invasive lighting of a vehicle cabin and applied in systems that recognise user gestures (e.g. control of lighting by hand movement.
Fig. 1. LED intensity distribution with 80° and 140° characteristics.
Depending on the application, the need for infrared-illuminated space will vary. In-cabin monitoring systems (ICMS) require a rather narrow viewing angle to observe the vehicle driver. For surveillance purposes, this angle should cover the entire area seen by the camera. Therefore, the PK2S series offers models with two viewing angles: 80° and 140°. The diagram (Fig. 1) shows the intensity of illumination in relation to the deviation from the vertical axis of the component – the red line is for 80° LEDs and the blue line for 140° models.
80° viewing angle
140° viewing angle
SMD version of IR LEDs
Small footprint, high power and good performance are the main advantages of PK2S-series diodes. For design reasons, the manufacturer recommends mounting these on automatic SMT lines with reflow soldering (incl. lead-free soldering).
| Specification: |
| Diode type: |
IR transmitter |
| Package: |
3535 |
| Diode lens: |
transparent |
| Base dimensions: |
3.45mm x 3.47mm |
| Profile*: |
1.9mm or 2.5mm |
*depending on the model
PK2S-series IR LEDs
| Symbol: |
Wavelength λd: |
Optical power: |
Viewing angle: |
Current: |
Voltage: |
|
PK2S-2KJE-A
|
840-870nm |
350mW |
80° |
350mA |
1.5...2.3V |
|
PK2S-2KKE-A
|
925-955nm |
625mW |
80° |
1000mA |
1.5...2.4V |
|
PK2S-2LJE-A
|
840-870nm |
350mW |
140° |
350mA |
1.5...2.3V |
|
PK2S-3KJE-A
|
840-870nm |
1400mW |
80° |
1000mA |
2.65...3.35V |
|
PK2S-3KKE-A
|
920-960nm |
500mW |
80° |
350mA |
2.6...3.35V |
|
PK2S-3LJE-A
|
840-870nm |
1560mW |
140° |
1000mA |
2.85...3.3V |
|
PK2S-4KJE-A
|
840-870nm |
805mW |
80° |
1000mA |
1.45...2.3V |
|
PK2S-4LJE-A
|
840-870nm |
960mW |
140° |
1000mA |
1.45...2.3V |