Applications Of OSRAM Infrared LEDs And Sensors in Data Transmission
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Devices such as vacuum robots, lawnmowers, and service robots are becoming increasingly integrated into our daily lives. Their operation requires significant data transmission between relatively rotating components-such as between the LiDAR drive mechanism and the SoC-to facilitate functions like distance data transfer and system control. Wired connections are prone to damage or disconnection; however, a combination of infrared LEDs and PIN photodiodes enables wireless data transmission, thereby avoiding these risks.
ams OSRAM offers mature, comprehensive solutions that ensure stable and reliable wireless data transmission for customers.
1. System Block Diagram: Principles of Infrared Data Transmission
The operating principle involves an infrared LED emitting a modulated optical signal, while the receiver converts this optical signal into an electrical signal and demodulates it to recover the data.
2. Pain Points in Infrared Data Transmission
(1) Insufficient LED brightness or low electro-optical conversion efficiency
- Insufficient LED brightness → Risk of failing to meet data transmission thresholds → Risk of data packet loss;
- Low LED electro-optical efficiency → Higher electrical power required (increased waste heat) to achieve target optical power → Increased system energy consumption → More frequent charging, negatively impacting the user experience.
(2) Poor LED consistency and unstable quality
- Severe optical degradation → Rapid drop in brightness → Abnormal signal reception → Data loss.
(3) Low sensor data transmission rate
- Long rise and fall times for PIN photodiode switching → Increased time per bit in the data stream → Low data transmission rate.
(4) Low sensor signal sensitivity
- Low sensitivity of the receiving PIN photodiode → Low signal-to-noise ratio → High bit error rate during data acquisition → Compromised data transmission performance.
3. What solutions does ams OSRAM offer?
- Offers a one-stop solution for your needs by providing both LED emitters and photodiode receivers;
- Features the high-brightness, high-efficiency OSRAM Infrared LED SFH 4258S, utilizing a proprietary "stacked-die" infrared chip technology to ensure signal stability while reducing system energy consumption;
- Includes the SFH 2400, a large-die photodiode offering fast response times, high signal strength, and excellent stability;
- Benefits from continuous infrared chip upgrades, with the 6th-generation IR:6 technology delivering stronger signals and higher efficiency;
- Backed by a shipment volume in the tens of millions and strong market recognition.
4. Key specifications for the SFH 4258S and SFH 2400 are listed below:
SFH 4258S
| Product Feature | Specification |
|---|---|
| AEC-Q Qualification | AEC-Q101-REV-C |
| Typical Centered Radiant Intensity [mW/sr] @100 mA | 185 mW/sr |
| Typical Radiant Flux [mW] @100 mA | 115 mW |
| Operating / Storage Temperature [℃] | -40℃ ~ 100℃ |
| Spectral Bandwidth [nm] @100 mA | 30 nm |
| Typical Forward Voltage [V] @100 mA | 3.1 V |
| Forward Current DC [mA] | 100 mA |
| Forward Pulse Current [mA] | 700 mA; tp = 100 μs |
| Half Angle [°] | 15° |
| Center Wavelength [nm] | 850 nm |
| Dimensions L x W x H [mm] | 3.5 mm x 2.8 mm x 3.8 mm |
SFH 2400-Z
| Product Feature | Specification |
|---|---|
| AEC-Q Qualification | AEC-Q101-REV-C |
| Spectral Sensitivity Range | 380 nm ~ 1100 nm |
| Peak Sensitivity Wavelength λS max (nm) | 850 nm |
| Photocurrent Ip (μA) | 10 μA |
| Dark Current (nA); (Vr = 20V, E- = 0) | 1 nA |
| Max Reverse Voltage Vr (unit: V) | 50 |
| Switching Time Tr/Tf (unit: ns) | 5 ns |
| Operating / Storage Temperature [℃] | -40℃ ~ 100℃ |
| Half Angle of Sensitivity [°] | 60° |
| Dimensions L x W x H [mm] | 4.6 mm x 2.0 mm x 1.06 mm |
SFH 4258S SFH 2400-Z
Continuous upgrades to OSRAM Infrared LEDs deliver higher brightness and efficiency.
Building on the SFH 4258S, ams OSRAM is launching the SFH 4258BS, which incorporates the newly developed IR:6 chip. Compared to the previous SFH 4258S, the new-generation SFH 4258BS offers an approximately 27% increase in optical power and a 40% improvement in Wall-Plug Efficiency (WPE).
Wall-Plug Efficiency (WPE): 50%
| Features | SFH 4258S | SFH 4258BS |
|---|---|---|
| Typical Centered Radiant Intensity [mW/sr] @100 mA | 185 | 325 |
| Typical Radiant Flux [mW] @100 mA | 115 | 145 |
| Storage / Operating Temperature [℃] | 100 | 110 |
| Typical Forward Voltage [V] @100 mA | 3.1 | 2.9 |
| Wall Plug Efficiency (WPE) | 35.5% | 50% |
5. Potential Application Scenarios
- Smart home applications, such as robot vacuums and robotic lawnmowers;
- Smart office buildings and hotels, including applications such as hotel food delivery robots and large-scale floor cleaning robots for shopping malls.
About Gainer LED:
Gainer LED was established in 2012. The company focuses on providing advanced technology solutions for medium and high power general lighting, special lighting and high-end display fields. Its products are widely used in commercial lighting, industrial lighting, smart buildings and professional display screens. Relying on a global marketing network and professional technical service system, Gainer LED continues to provide global customers with high-performance lighting products that meet international standards and fully meet the diverse needs of the market.
For more customer service needs, please contact us:
- Phone: +8615818679054
- Tel : +86-755-27835429
- Email: info@gainer-led.com
