Logic level and Snubberless TRIACs

AN439

10/16

Figure 10.

Comparison between standard and Snubberless 12 A TRIACs

Whatever the nature of the load, there is absolutely no risk of spurious turn-off triggering if

Snubberless TRIAC is higher than the decreasing slope of its rms on-state current specified

Equation 11

For example, the slope of the decreasing current in a TRIAC conducting 6 A, 8 A, 10 A, 12

A, 16 A or 25 A when the current drops to zero is given in the Table 2.

Table 2 summarizes also the characteristics of the available BW and CW Snubberless

TRIACs.

Table 2.

(dI/dt)c specification for available BW and CW Snubberless TRIACs and

Type

(A)

Voltage

(V)

Suffix

Max.

(mA)

Static

(dV/dt)

Min.

(V/µs)

(dI/dt)c

(A/ms)

(A/ms)

BTA / BTB

6

600

CW

35

400

3.5

3

BW

50

1 000

5.3

BTA / BTB

8

600 or 800

CW

35

400

4.5

4

BW

50

1 000

7

BTA / BTB

10

600 or 800

CW

35

500

5.5

5

BW

50

1 000

9

BTA / BTB

12

600 or 800

CW

35

500

6.5

6

BW

50

1 000

12

BTA / BTB

16

600 or 800

CW

35

500

8.5

8

BW

50

1 000

14

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

0.1

1

10

100

(dI/dt)c (A/ms)

BTA/BTB12

-

xBW

BTA/BTB12

-

xB

(dV/dt)c (V/µs)

)

A

(

RMS

3

)

Hz

(

)

A

(

RMS

)

ms

/

A

(

OFF

I

5

.

0

10

f

2

2

I

dt

/

dI

·

≈

·

·

·

·

-

π

=

Hz

50

for

I

44

.

0

dt

/

dI

)

A

(

RMS

)

ms

/

A

(

OFF

·

=

Hz

60

for

I

53

.

0

dt

/

dI

)

A

(

RMS

)

ms

/

A

(

OFF

·

=