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STCC02-ED5 Fiches technique(PDF) 11 Page - STMicroelectronics

No de pièce STCC02-ED5
Description  CONTROL CIRCUIT FOR HOME APPLIANCE MCU BASED APPLICATION
PDF  13 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCC02-ED5 Fiches technique(HTML) 11 Page - STMicroelectronics

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■ ZVS CIRCUIT COMPATIBILITY WITH THE POWER SUPPLY RECTIFIER BRIDGE
In some cases, the operation of the ZVS circuit may require a small capacitor CZV on the pin SYN in
addition to the resistor RZV. The diodes of the full wave rectifier bridge may have a low speed and may
switch off with recovery charges that create spikes on the pin SYN as shown on the waveforms below.
With a10k
Ω - 22nF RC circuit, the ZVS circuit becomes immune to such spikes.
D1
1N4002
VCC
TR1
12V 1.5VA
D2~D5
1N4002
DOOR SWITCH
C1
220uF
C6
22nF
MAINS1
R1
10k
Vin
VCC
VDD
VIN
CUP
VIN
VCC
RZV
CZV
DLC
ZVS
SYN
IN2
IN2
COM
5V Regulator
Reset with delay
Zero volts sync.
Door closed detection
Magnetron driver
Fan driver
Buzzer driver
4ms/div
VTF
VZVS
2V/div
5V/div
4ms/div



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