Yint P-SLED In Constant Current Circuit Application to Extend LED Life and Improve Stability and EMC Performance
With the steady improvement of LED technology, high-end mainstream industrial and mining lights, tunnel lights signage lighting, and other applications are using LED lighting technology. For high-quality products, the requirements of cost-effective, essential for the protection of LED failure, YINT company for this application developed a P-Thyristor protection tube. P-SLED series of products to provide SMA (Do-214AC), and SMB (Do-214AA) compact and diversified packages, easy-to-use production.
I.Product Application Advantages
●Extend LED life
●Protect LED parallel stage capacitance, reduce capacitance size
●Improve stability and EMC performance
II.Typical Application Scenarios
Fig.1
III.Application Topology
Fig.2
IV.LED Bead String And Voltage Relationship
Table.1
V.Application Notes
The above application circuit uses a constant current source power supply, most constant current circuits on the market only over-voltage protection, short-circuit protection, and over-temperature protection, and there is no open-circuit protection, when one of the LED strings of open-circuit failure, the circuit will generate surge voltages, the use of shunt capacitors will soon be short-circuited, which will blow up capacitors caused by fires and other unexpected failure, a serious life-threatening hazards.
VI.Product Characterization
Description:
Unipolar P-SLEDs solve the problem of ultra-low leakage current, which we have to consider as Ir is close to zero, for enclosed LED products, avoiding the heat source.
Fig.3
V-I operating characteristics：
The operating characteristics of Quadrant 1 are shown on the left.
The operating characteristics of the third quadrant are VF forward compression characteristics.
Fig.4
Vt and It curve relationship
Fig.5
Vbr vs. T temperature curve relationship
Fig.6
VII.Electrical Parameters（Ta：25℃）
Table.2
①IDRM2 is measured at TA= 150℃
②VBO is measured at 100KV/s
③Off-state capacitance is measured in VDC=2V,VRMS= 1V, f=1MHz
VIII.Product Size（Millimeters）
Fig.7
IX.Principles Of Selection
LED Voltage<P-SLED Avalanche Voltage<Maximum Voltage for Electrolytic Capacitor
- +1 Like
- Add to Favorites
Recommend
- A 12V DC Lightning Protection Solution from Yint
- Yint Electronics Recommends Using a Varistor for Input Overvoltage Protection of Smart Meters
- Yint Electronics Provides Effective Circuit Protection for UWB Positioning Base Stations
- Yint Electronics MOV 14D561K, TVS SMBJ6.5CA P6SMBJ10CA for Power Line Carrier PLC Interface Circuit
- How To View The Importance Of Power Surges To The System？
- The Applications of PPTC Protection Devices in Wireless Electronic Products, Battery Packs, Chargers, Power Converters and Transformers
- Yint Electronics provides the SD/TF Memory Card Interface Solution
- Yint‘s ESDSR05-4 TVS Meet the Electrostatic Protection Design Of SIM Card Reading Circuit
This document is provided by Sekorm Platform for VIP exclusive service. The copyright is owned by Sekorm. Without authorization, any medias, websites or individual are not allowed to reprint. When authorizing the reprint, the link of www.sekorm.com must be indicated.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
