On/Off Timer Mode; Phase Control Mode; Figure 21. On/Off Control In Timer Mode (Dc Command On The Left And Pulse Command On The Right) - STMicroelectronics STEVAL-GLA001V1 User Manual

3.3.3

ON/OFF timer mode

Figure 21.
push
Triac push
button
Triac gate
command
V
MAINS
I
T
This mode is selected through the MODE switch (refer to
similar to the ON/OFF basic mode, but a timer stops the AC switch/Load instead of pushing a button.
When you push the AC switch/Load button (Tx) ON, the
ZVS, lights ON the corresponding LED (LEDx) and then activates the corresponding AC switch gate (Gx).
The AC switch/load is stopped after the timer ("OnTime" duration) has elapsed: the gate is deactivated and the
LED is switched OFF.
By default, the gate command is a pulsed signal with a duration equal to "tp" value. You can modify this gate ON
duration by pushing on the "TP+" button (to increase ON time) or "TP-" button (to decrease ON time). The gate
command becomes a DC signal when "tp" value has reached the half-period. You can also modify the timer
duration "OnTime" by pushing on the "Power Time +" button (to increase timer duration) or "Power Time -" button
(to decrease timer duration).
All parameters (range, default value, unit, step, etc.) used to configure the load control for this mode are
described in Section 3.6 User
refer to Section 2.5 Hardware function
UM2304 - Rev 3
ON/OFF control in timer mode (DC command on the left and pulse command on the right)
OnTime
Wait for next zero voltage crossing
Current in the Triac
turns off at next
zero cu rrent
interface. For more details regarding the hardware components used for this mode,
description.
push
Triac push
button
tp tp
Triac gate
command
Wait for next zero voltage crossing
V
MAINS
cros sin g
I
T
Section 3.3.1 Mode
NUCLEO-F030R8
UM2304
Operating mode
OnTime
Current in the Triac
turns off at next
zero cu rrent
selection). This mode operation is
development board waits for the next
cros sin g
page 16/46