P-SLED In Constant Current Circuit Application
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P-SLED In Constant Current Circuit Application

Views: 0     Author: Site Editor     Publish Time: 2023-10-17      Origin: Site

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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

           

 

                       1                         2

 

III.application topology

 

                                                     

info-524-287

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

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

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

Vt and It curve relationship

info-323-258

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)
4

Mounting Pad Layout

5

 

 

7

Mounting Pad Layout

8

 

 

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

 

 

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