 |
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 |
|
L9305 数据表(PDF) 39 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
L9305 数据表(HTML) 39 Page - STMicroelectronics |
|
|
39 / 107 page  8.1 Power supply monitoring and diagnostics 8.1.1 VDD over and under voltage diagnostics The VDD power supply input pin is continuously monitored for over and under voltage conditions by comparing the input voltage with an independent reference. In addition to the static voltage monitoring function, the L9305 includes a self-test to verify the proper operation of the comparator and fault logic thus preventing latent faults from influencing device operation. The self-test is run automatically after a power on reset event. Upon detecting a fault, the corresponding fault bits are set as summarized below. Table 23. VDD Fault Summary Register Location Bit Name SERVFLT1 D4 VDD Under Voltage SERVFLT1 D5 VDD Over Voltage SERVFLT2 D6 VDD UV Self Test SERVFLT2 D7 VDD OV Self Test A VDD under voltage fault will disable all solenoid drivers and the fail-safe pre-driver. The fault is clear on SPI read but solenoid and fail safe operation must be re-enabled through the SPI. In case of overvoltage on VDD, fault information is available on SPI, but no action is executed on the solenoid drivers and the fail-safe pre-driver. The fault is clear on SPI read. 8.1.2 VBATP supply over voltage The VBATP power supply input pin is continuously monitored for an over voltage condition by comparing the input voltage with an independent reference. In addition to the static voltage monitoring function, the L9305 includes a self-test to verify the proper operation of the comparator and fault logic thus preventing latent faults from influencing device operation. The self-test is run automatically after a power on reset event. Upon detecting a fault, the corresponding fault bits are set as summarized below. Table 24. VBATP Fault Summary Register Location Bit Name SERVFLT1 D1 VBATP over voltage SERVFLT2 D4 VBATP over voltage self-test A VBATP over voltage fault will disable all solenoid drivers and the failsafe pre-driver. The fault is clear on SPI read but solenoid and fail safe operation must be re-enabled through the SPI. 8.1.3 VCP supply under voltage The VCP charge pump power supply is continuously monitored for an under voltage condition by comparing the input voltage with an independent reference. Upon detecting a fault, the corresponding fault bit is set as summarized below. Table 25. Charge pump fault summary Register Location Bit Name SERVFLT1 D3 CP under voltage A VCP under voltage fault will disable all solenoid drivers and the failsafe pre-driver. The fault is cleared on SPI read but solenoid and fail safe operation must be re-enabled through the SPI. L9305 Safety features DS12774 - Rev 10 page 39/107 |
|
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
