With the steady improvement of LED technology, high-end mainstream industrial and mining lights, tunnel lights and signage lighting and other applications are using LED lighting technology.For high-quality products, the requirements of cost-effective, essential for the protection of the LED failure, our company for this application developed P-Thyristor protection tube.P-SLED series of products to provide SMA (Do-214AC), 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
![2 2](//ilrorwxhrqrmjm5p-static.micyjz.com/cloud/jiBpnKoojmSRjkmokqlrjp/202310171551597e4cc930eda44e08b857e433769682b0.png)
III.application topology
![info-524-287 info-524-287](//ilrorwxhrqrmjm5p-static.micyjz.com/cloud/jrBpnKoojmSRjkmokqjijp/20231017155516d1622f3c8b2c489ca8bc97f6bc8cea23.png)
IV.LED bead string and voltage relationship
Specification | LED Voltage | Electrolytic Capacitor Withstanding Voltage | Electrolytic Capacitor Upper Limit Voltage | P-SLED |
3L ( 3*9V) | 27V | 35V | 43.75V | 27V<Vp<43.75 |
4L | 36V | 50V | 62.5V | 50V<Vp<62.5V |
5L | 45V | 50V | 62.5V | 50V<Vp<62.5V |
6L | 54V | 63V | 78.25 | 64V<Vp<78.25 |
7L | 63V | 80V | 100.0V | 80V<Vp<100.0V |
8L | 72V | 100V | 125.0V | 72V<Vp<125.0V |
V.application notes
The above application circuit using a constant current source power supply, most constant current circuits on the market only over-voltage protection, short-circuit protection, over-temperature protection, and there is no open-circuit protection, when one of the LED string 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
![info-86-154 info-86-154](//ilrorwxhrqrmjm5p-static.micyjz.com/cloud/jjBpnKoojmSRjkmokqlijp/202310171609459be3dcbd53e74672b772b3cfe3353f7c.jpeg)
| 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. |
![info-323-293 info-323-293](//ilrorwxhrqrmjm5p-static.micyjz.com/cloud/jlBpnKoojmSRjkmokqoijp/202310171610401b4bfb9f1df645e5b74e647583dbaced.jpeg)
| 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. |
![info-323-228 info-323-228](//ilrorwxhrqrmjm5p-static.micyjz.com/cloud/jqBpnKoojmSRjkmokqmijp/2023101716104033f7fcc7206444a1b37a9296fab3d87a.jpeg)
| Vt and It curve relationship |
![info-323-258 info-323-258](//ilrorwxhrqrmjm5p-static.micyjz.com/cloud/jrBpnKoojmSRjkmokqijjp/20231017161040000c007b1b944eeeb0e204680f34c059.jpeg)
| Vbr vs. T temperature curve relationship |
VII.electrical parameters(Ta:25℃)
P/N | IDRM@VDRM PN2-1 | IDRM2@VDRM ① PN2-1 | VBO② @IBO PN2-1 | VBR@IBR PN2-1 | VT @IT PN2-1 | IH PN2 -1 | Co③ PN2- 1 | VBR@IBR PN1-2 |
uA | V | uA | V | V | mA | V | mA | V | A | mA | pF | V | mA |
Max | Min | Max | Min | Max | Max | Min | Max | Max | Max | Max | Max | Max | Max |
PSLED0321 | 1 | 28 | 50 | 28 | 40 | 200 | 28 | 1 | 1.8 | 2.2 | 30 | 80 | 18 | 1 |
PSLED0401 | 1 | 33 | 50 | 33 | 48 | 200 | 33 | 1 | 1.8 | 2.2 | 30 | 80 | 18 | 1 |
PSLED0501 | 1 | 53 | 50 | 53 | 60 | 200 | 53 | 1 | 1.8 | 2.2 | 30 | 80 | 18 | 1 |
PSLED0641 | 1 | 60 | 50 | 60 | 80 | 200 | 60 | 1 | 1.8 | 2.2 | 30 | 80 | 18 | 1 |
PSLED0721 | 1 | 75 | 50 | 75 | 88 | 200 | 75 | 1 | 1.8 | 2.2 | 50 | 150 | 18 | 1 |
PSLED0901 | 1 | 85 | 50 | 85 | 100 | 200 | 85 | 1 | 1.8 | 2.2 | 50 | 150 | 18 | 1 |
PSLED1101 | 1 | 95 | 50 | 95 | 115 | 200 | 95 | 1 | 1.8 | 2.2 | 50 | 150 | 18 | 1 |
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)
IX.principles of selection
LED Voltage < P-SLED Avalanche Voltage < Maximum Voltage for Electrolytic Capacitor
Note: If you encounter any problems during the selection process, please log in:www.yint.com.cn or Email:trade@yint.com.cn