 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
L9779WD 数据表(PDF) 23 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
L9779WD 数据表(HTML) 23 Page - STMicroelectronics |
|
|
23 / 170 page  DocID027452 Rev 5 23/170 L9779WD Functional description 169 When the KEY_ON reaches a sufficient high voltage VKEYH, after a minimum deglitch filter time T_KEY the system is switched on. First of all the main relay driver is switched on, so the main relay connects VB pin to battery. Control current into pin KEY_ON is sufficient for basic functions such as filtering time, control the main relay output stage, internal oscillator and internal bias currents. When the voltage at VB exceeds the under voltage-detection threshold for VB (VB_UV_H) the internal biasing circuits are activated. VDD5 regulator is activated Tdelay_REG seconds later. After VDD5 exceeds the VDD_UV threshold and with typ. 1.0 ms delay, the V3V3 is activated also. The sensor supplies VTRK1, 2 are turned on together with VDD5. Figure 7. Permanent supply power-up sequence In case VB is always connected, when the KEY_ON voltage exceeds VKEYH the internal biasing circuits are activated. VDD5 regulator is activated Tdelay_REG seconds after the tKEY filter time has expired. |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 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 |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
