STEVAL-ILL004V1 STMicroelectronics, STEVAL-ILL004V1 Datasheet - Page 10

• 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

Universal motor speed control
2.3
2.3.1
Note:
10/38
STEVAL-ILL004V1 application design procedure
Several considerations must be taken in account during the design procedure, including:
●
●
●
●
Capacitive power supply circuit
The capacitive power supply is shown in
constant as long as the output current I
input current I
inrush current, which must be lower than the maximum current through the capacitor C1.
The input current I
Equation 1
where,
Figure 6.
When the main voltage for the components used in this application is 230 V
maximum output current is expressed as:
Equation 2
The real maximum current capability measured on the board is I
value is a little bit lower than the value coming from the equation, so the capacitive supply
design has to be calculated with some reserve (approximately 20%).
The power supply circuit
TRIAC power dissipation
ZCD resistor values
The size of the current-limiting resistor (R4)
–
–
–
–
V
(because the output capacitor C2 is charged only in one half of the period)
V
V
X
HPINRMS
RMS
ZD
C1
N
F
Capacitive power supply circuit diagram
: the reactance of the capacitor C1.
IN
= the voltage drop across the Zener diode
. I
= the RMS voltage of an AC sine wave
I
IN
IN
IN
I IN
≥
is limited by R1 and the reactance of C1. The R1 resistor limits the
= the half period of the Root Mean Squared (RMS) Input Voltage,
I
can be expressed by the following equation:
I
OUT
OUT
=
=
V
---------------------------------- -
-----------------------------------------------------------------------------------------------
2
R1
X
HPINRMS
•
C1
⎛
⎜
⎝
------------------------------------------------------------
2π50
+
~275 VAC x 2
R
C1
1
230 5.6
•
OUT
ZD1
=
330
Figure
1
-------------------------------------- -
V
-------------------------------------- -
–
is less than or equal (in an ideal case) to the
RMS
X
•
C1
5.6 V
10
2
6. The voltage at the output will remain
+
–
–
R
V
D1
9
ZD
1
+
450
=
---------------------------------------------------
2
⎞
⎟
⎠
+
•
=
V
C2
⎛
⎜
⎝
RMS
11.11 mA
------------------- -
2π
1
f
OUT
C
–
1
V
+
ZD
= 9.5 mA. This real
R
1
I OUT
⎞
⎟
⎠
ac
V OUT
/ 50 Hz, the
AI11888a
AN2263