поискавой системы для электроныых деталей |
|
STCC02-E датащи(PDF) 10 Page - STMicroelectronics |
|
STCC02-E датащи(HTML) 10 Page - STMicroelectronics |
10 / 13 page STCC02-ED5 10/13 ■ 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 VCC and DS should be split from the signal ground VSS. (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 VDD, 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 VCC forward track and the DS signal reward track should be linked to reduce EMI on the signal DS. (5) ■ ELECTROMAGNETIC COMPATIBILITY TEST CIRCUIT Standards such IEC61000-4-X evaluate the electro- magnetic compatibility of appliance 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 equipment can be 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 link with an oscillo- scope, 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. VDD VDD VIN VIN VCC DOOR SWITCH RELAY COIL DS Relay Drive 5v REG Reset RST \ RST \ COM MCU STCC02 VSS 1 1 4 3 3 5 4 2 tr : 5 ns tp : 50 ns MAINS 0.5 kV to 4 kV BURST COUPLE |
Аналогичный номер детали - STCC02-E |
|
Аналогичное описание - STCC02-E |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |