STEVAL-ILL004V1 STMicroelectronics, STEVAL-ILL004V1 Datasheet - Page 16

• Manufacturer Part Number: STEVAL-ILL004V1
• Description: EVAL BOARD PHASE CONTROL DIMMER
• Manufacturer: STMicroelectronics
• Type: Power Management: Lighting and Ballast Controllerr

Specifications of STEVAL-ILL004V1

• Design Resources: STEVAL-ILL004V1 Gerber Files STEVAL-ILL004V1 Bill of Material STEVAL-ILL004V1 Schematic
• Contents: Fully Assembled Evaluation Board
• Product: Display Modules
• For Use With/related Products: ST7FLITE09
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-5081

Light dimmer design and load configurations
3.1
Note:
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Figure 10. STEVAL-ILL004V1 light dimmer evaluation board
Phase and neutral lines unavailable
In many lighting applications, both phase and neutral lines are not available. For example, in
a light switch on the wall, usually only the phase line is connected. A similar evaluation
board application design is shown in
and the energy supply for the microcontroller comes from the TRIAC voltage (when the
TRIAC is turned OFF).
If the TRIAC is turned ON for a long time during half of the signal period, there is not enough
time (voltage) to save the energy and the device will not work. Because of this limitation, it is
not possible to switch the TRIAC ON for 100% of the time. With the power supply as it is
applied in this design, the maximum opening time for the TRIAC is approximately 80% (see
Figure
the evaluation board.
If the load (lamp) is in serial with the board, the input filter must NOT be assembled
(especially the input capacitors). This may produce a large time rate of change of the current
(dI/dt) on the TRIAC, which can be damaged if the device is turned ON.
Figure 11. Light dimmer-unavailable phase and neutral lines
12). This measurement was done with 500 W halogen lamp connected in serial with
Figure
11, where the lamp is in serial with the board
AN2263