參數(shù)資料
型號: STCC02
英文描述: CONTROL CIRCUIT FOR HOME APPLIANCE MCU BASED APPLICATION
中文描述: 控制電路中的應(yīng)用用于家電MCU的
文件頁數(shù): 10/12頁
文件大?。?/td> 269K
代理商: STCC02
STCC02-BD5
10/12
I
IMMUNITY IMPROVEMENT OF STCC02 AND ITS MICROCONTROLLER
Some basic rules can be applied to improve the STCC02 immunity in its application:
- The power grounds of V
CC
and DS should be split from the signal ground V
SS
. (1)
- The STCC02 is placed as close as possible of the MCU;(2)
- The supply capacitors would increase the system immunity by being placed closed to the blocks they
feed;(3)
- Wide supply copper plane should be avoided to reduce sensitivity to radiated interferences.
More specifically with the STCC02 circuit,
- A decoupling capacitor can be put on the STCC02 pins SYN and the MCU reset pin;(4)
- Depending of the PCB layout quality, others capacitors may be put on sensitive pins such as the output
regulator pin V
DD
, the synchronization circuit pin ZVS or the door switch pin DS.
The power door switch is a well-identified electrical noise source for the electronic board. Its effect should
be reduced as much as possible. For instance, its power wires should be twisted together and split from
other wires. Its signal wires should be also twisted; and on the PCB, the V
CC
forward track and the DS
signal reward track should be linked to reduce EMI on the signal DS.(5)
I
ELECTROMAGNETIC COMPATIBILITY TEST CIRCUIT
V
DD
V
DD
V
IN
V
IN
V
CC
DOOR
SWITCH
RELAY
COIL
DS
Drive
5v REG
Reset
RST \
RST \
COM
MCU
STCC02
V
SS
1
1
4
3
3
5
4
2
tr : 5 ns
tp : 50 ns
MAINS
0.5 kV to 4 kV
BURST COUPLE
Standards
electromagnetic
systems. To test the immunity level of the STCC02
to the IEC61000-4-4 (transient bursts), a board
representative of usual control unit for microwave
oven has been developed, as shown on top of
page 11.
One characteristics of the IEC61000-4-4 test, is
that
no
measurement
connected to the tested system, as it would corrupt
the test results. That is why this board includes a
remote monitoring circuit based on optic fibers.
Thus,
without
any
electrical
oscilloscope, it is possible to monitor the VDD
voltage as well as the RESET or the ZVS outputs
of the STCC02, during the IEC61000-4-4 test. This
optical link detects parasitic commutations of
outputs as short as 60ns.
With this board, and the burst generator coupled to the mains as specified in the IEC61000-4-4 standard
(see the above principle diagram), the STCC02 has been tested successfully at 4kV.
such
IEC61000-4-X
compatibility
evaluate
of
the
appliance
equipment
can
be
link
with
an
相關(guān)PDF資料
PDF描述
STCC02-BD5 CONTROL CIRCUIT FOR HOME APPLIANCE MCU BASED APPLICATION
STD100NH02LT4 TRANSISTOR | MOSFET | N-CHANNEL | 20V V(BR)DSS | 60A I(D) | TO-252AA
STD10N10-1 TRANSISTOR | MOSFET | N-CHANNEL | 100V V(BR)DSS | 10A I(D) | TO-251
STD10N10L TRANSISTOR SMD MOSFET TO 252 D PAK
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