ACS102-6T

AC line switch - basic application

7/11

2.1.2

AC line transient voltage ruggedness

The ACS102-6T switch is able to withstand safely the AC line transients either by clamping

the low energy spikes or by breaking over under high energy shocks, even with high turn-on

current rises.

The test circuit shown in Figure 16 is representative of the final ACS102-6T application, and

is also used to test the ACS switch according to the IEC 61000-4-5 standard conditions.

Thanks to the load limiting the current, the ACS102-6T switch withstands the voltage spikes

up to 2 kV above the peak line voltage. The protection is based on an overvoltage crowbar

technology. Actually, the ACS102-6T breaks over safely as shown in Figure 17. The

ACS102-6T recovers its blocking voltage capability after the surge (switch off back at the

next zero crossing of the current).

Such non-repetitive tests can be done 10 times on each AC line voltage polarity.

Figure 14.

Effect of the switching off of a high

inductive load - typical clamping

capability of ACS102-6T

Figure 15.

Description of the different steps

during switching off of a high

inductive load

1

2

3

4

5

I

H

I

(5 mA/div)

OUT

V

V

(200 V/div)

OUT

100µs/div

I

H

V

CL

V

OUT

I

OUT

1

2

3

4

5

I

H

V

CL

V

OUT

I

OUT

1

2

3

4

5

Figure 16.

Overvoltage ruggedness test circuit

for resistive and inductive loads

with conditions equivalent to

IEC 61000-4-5 standards

Figure 17.

Typical current and voltage

waveforms across the ACS102-6T

during IEC 61000-4-5 standard test

2.4 kV surge

Surge generator

"1.2/50 waveform"

Rg

220

ACS102-6Tx

Rgene

2

L

5µH

R

150

Model of the load

I

(2 A/div)

OUT

V

PEAK

V

(200 V/div)

OUT

200ns/div