APPLICATION INFORMATION

1. HOW TO CHOOSE THE TRIAC ASSOCIATED

TO THE MOTION DETECTOR UAA4713

Analysis of the Triac Associated to the Motion

Detector UAA4713

Associated with the UAA4713, the Triac is de-

fined by the driver output stage (Triac output pin

5) and the characteristics of the load.

The Triac is consequently defined by:

1) The gate sensitivity

2) The surge current capability

3) The RMS Triac current

4) The blocking voltage capability

1) The gate sensitivity

The ”Triggering gate current” is the parameter to

25

°C. as a maximum value required to trigger the

Triac.

The UAA4713 Triac output provides a current of

65mA typical.

In order to control the Triac properly IG should be

For this reason it is suggested to use a snubber-

2) The surge current capability

In the Triac databook the surge current capability

of the Triac is given by the non repetitive surge

peak current:

ex. BTA06-600CW

°C

t = 8.3mA: 63A

t = 10ms: 60A

The choice of the Triac is defined by the following

application parameters:

a)The starting performance, and the ratio of

the nominal resistance to the cold resis-

tance, KR

√2

b)The thermal fast fuse behaviour during

short-circuit condition.

(I

following table is suggested.

240V

110V

Power (W)

600

1000

>1000

50

80

>100

80

120

>150

3) RMS Triac Current

light power P:

It depends also on the heat sink which has to limit

the junction temperature in the worse case condi-

to 25A.

4) Blocking Voltage Capability

by the mains:

Country

Mains Voltage

EUROPE

240

600

USA

110

400

5) Conclusion:

Selector guide with the above parameters the op-

timal device selection for a given power to be

controlled is given in the following table:

LIGHT POWER

(W)

240

110

600

BTA 06 600 CW

BTA 08 400 CW

1,000

BTA 08 600 CW

BTA 12 400 CW

> 1,000

BTA X 600 CW

X= 10

X= 12

X= 16

BTA X 400 CW

X= 12

X = 16 (A)

Ref: High Performance Triacs that need no snub-

ber (DSTRIACBK/1088)

UAA4713

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