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AN2383 Datasheet(PDF) 10 Page - STMicroelectronics

Part # AN2383
Description  A single plate induction cooker with the ST7FLITE09Y0
PDF  39 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2383 Datasheet(HTML) 10 Page - STMicroelectronics

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Schematic
AN2383
10/39
Doc ID 12433 Rev 3
3.3
Power stage
Figure 4.
L6384 IGBT driver and power stage
The +325 V DC link voltage is applied through a filter to the upper-side IGBT only when the
safety relay is closed and the system is on. Components inside the dotted rectangle are the
core part of the power stage: the L-C resonant tank is obtained by the plate (represented in
the schematic by a spiral) and the capacitors on the left side. The resonant capacitor has
been divided in two identical capacitors, so that the amount of current flowing through each
capacitor is reduced by half, while the voltage to the capacitors remains the same.
A current transformer has been placed in series with the plate in order to provide plate
feedback information to the MCU.
The IGBTs are driven by high frequency complementary square waves with 50% duty cycle.
The PWM0 signal applied to the driver input pin is generated directly by the MCU. The
frequency varies in a range between 19 kHz and 60 kHz.
For more information regarding the dead time, charging pump capacitor and driving
topology, please refer to the L6384 datasheet.
AI12613
PWM0
C36
47nF
D17
STTH102
C13
33nF
800V
L2
80µH
Q1
Q2
R20
10K
R2147R
R22
11R
R23
10K
R24
47R
R25
11R
TR1
1.5KE
D8
STTH102
D9
STTH102
+3 25V
C14
33nF
800V
D18
ST TH102
C11
680n
800V
C12
680nF
800V
C10
3µF
4 00V
C15
1µF
R19
470K
1W
IN
1
VCC
2
DT/SD
3
GND
4
LVG
5
VOUT
6
HVG
7
VBOOT
8
U2
L6384
R26
220K
R28
4K7
R27
1K
C16
2n2
+ C17
10µF
35V
1
FST4
SCREW
C37
47nF
1
FST5
SCREW
+15V
41
32
T2
TDKCT034
1:20 0
PLATE



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