DocID024503 Rev 1
13/27
UM1631
Power supply consumption
ACS devices have lower V
GT
variation with load current than Triacs and that is why they are
more suitable for 3.3 V applications as the gate current variation is lower.
Refer to the AN2986 application note for further details and for gate resistor calculation.
5.3
Pulsed gate control and average gate current consumption
gives the initial gate current pulse widths for each AC switch, and the maximum
pulse width that may be programmed to keep the overall consumption below the maximum
capability of the VIPer16 supply.
Current consumption of the MCU and six signal LEDs, when turned ON, was estimated at
25 mA. Total current consumption of the board when all Triacs/AC switches are ON with
maximum gate current pulse is 95 mA (T1 and T2 have 1 ms gate current pulse as
described above).
Table 3. Application current consumption
Device
PCB
label
Gate
resistor
[
]
I
GT
(T
j
= 25 °C)
[mA]
I
GT
(T
j
= 0 °C)
[mA]
Gate current
pulse
duration
[ms]
Maximum
average
current
[mA]
Max. gate
current pulse
duration (DC
mode) [ms]
T1635H-6T
T1
30
35
50
1
5
N/A
(1)
ACST1635-8FP T2
30
35
50
1
5
Z0109MA
T3
112
10
15
2
3
10
ACS108-8SA
ACS1
112
10
15
10
15
10
ACS108-8SA
ACS2
112
10
15
2
3
10
ACS108-8SA
ACS3
112
10
15
2
3
10
1. Device is controlled in phase angle control, long pulse is not desired.
