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AN2383 Datasheet(PDF) 12 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) 12 Page - STMicroelectronics

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Schematic
AN2383
12/39
Doc ID 12433 Rev 3
3.5
MCU pin configuration
Figure 6.
MCU pin configuration
The ST7FLITE09Y0 microcontroller controls the whole induction cooking system. It can be
in-circuit programmed (ICP) via a standard 10-pin connector.
Starting from the left, going clockwise, the first input is the VLINK. It comes from the power
diode bridge and is an image of the DC link voltage applied to the upper side IGBT. Read as
analog input, this signal is used by the MCU to detect when a pot is placed on the plate or
when it has been removed.
TMP1 and TMP2 provide the MCU with the temperature information coming from the
heatsink and plate, respectively.
KEYS is an analog input read by the internal A/D converter of the MCU, and is connected to
the keyboard in the user interface. The keyboard features 3 buttons. In order to save MCU
pins, a smart schematic has been adopted, so that just one input pin is needed to read all
the keys.
The I-CTRL feedback is processed as analog input. It is an image of the current flowing
through the plate.
TP4
KEYS
TP5
TP6
TMP1
1
2
J8
FAN
+
C3 0
100µF
35 V
TMP2
C8
100nF
+5V
I CC Programmer
RELAY
ExternalI nterr upt request:
TP12
AL ARM
+15V
VSS
1
PA0 (H S)/LTIC
16
PA1(HS)
15
PA 2(HS)/ATPWMO
14
PA 3(HS)
13
SS /A IN0/PB0
4
SCK/AIN1/PB1
5
MISO/AIN 2/PB 2
6
MOSI/AIN 3/PB3
7
CLKIN/AI N4 /PB4
8
PA7
9
RESET
3
VDD
2
PA 4(HS)
12
PA5(HS)/ICCDATA
11
PA6/MCO/ICCCLK
10
U1
ST 7F LITE 09
PA0 -16 - ei0 - ALARM
ei0
ei1
TP7
D3
1N4007
PA7 - 9 - ei1 - 50Hz
PWM0
R49
100
+5V
R50
10K
TP8
C9
10 nF
SCLK
TP9
8
4
2
7
6
5
1
3
Q5
STS5NF 60L
R51 is mandatory if residual voltage is still on Reset Pin.
R52 is not mandatory, its functionality has to be checked dur ing tests.
1
2
3
4
5
6
7
8
9
10
J7
CON10A
+5V
TP10
VL INK
Reset Pin Hints:
TP13
TP11
50Hz
Fan control
DATA
R52
10K
+5V
/LE
R51
1M
TP1
C35
2 20µF
16V
TP2
TP3
I-CTRL
AI12608



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