UM0583
Demonstration board introduction
5/23
Components on the demonstration board include:
●
the STCC08 device (U1)
●
the STLITE39F2 MCU (U2). The 8-bit MCU drives the AC switch through the STCC08,
analyzes the STCC08 AVF signals and powers LEDs to indicate AC switch failures
●
the ACS108-6S (U3), transient voltage protected AC switch
●
A capacitive DC power supply
●
An ICC (in-circuit connector) (J3) to load the firmware in the MCU.
Warning:
Before the board is connected to a computer through the ICC
connector, ensure that the AC line is connected to the board
through an insulated plug. This is essential to avoid electrical
shock.
●
A switch to simulate an AC load failure in open circuit (SW1)
●
2 switches (SW2, SW3) to simulate a diode mode failure in both polarities of the AC line
and a short-circuit of the AC switch (when SW2 and SW3 are in the “YES” position at
the same time)
●
A switch to simulate an AC switch failure in open circuit (SW4)
●
An STCC08 CNTRL switch (SW5). This switch is used to turn the AC switch (ACS) on
or off through the MCU and the STCC08
●
An STCC08 CNTRL LED (D5), used to see whether or not the AC switch has been
controlled by the user
●
LEDs to define the ACS state
–
A “DIODE” LED (D6) to visualize an ACS failure in diode mode in both AC line
cycles. The LED is on if the AC switch fails in diode mode.
–
An “OPEN” LED (D7) to indicate an ACS failure in open circuit. This LED is on if
the AC switch is damaged in open circuit
–
A “CC” LED (D8) to show an ACS failure in short-circuit on both polarities of the
AC line. This LED is on if the AC switch is damaged in short-circuit
–
An “ON” LED (D9) to indicate that the AC switch is on
●
Test points to allow the connection of voltage probes:
–
L (TP2) and N (TP1): line and neutral of the AC line
–
VCC (TP3): positive power supply
–
GND (TP4): power supply reference
–
ZVS (TP5): zero crossing of the AC line voltage
–
OUT (TP6): anode of the ACS
–
AC (TP7): ACS status sense input
–
AVF (TP8): alternating voltage feedback. ACS status output
–
ON/OFF (TP12): “STCC08 CNTRL” switch state, used to turn on or off the ACS
through the MCU and the STCC08
–
IN (TP9): STCC08 IN input used to control the ACS
●
An AC line connector (J1)
●
An AC load: light bulb (15 W at 230 V
RMS
).
For more detailed information, please refer to the schematic diagram in
Appendix A
.
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