数据搜索系统,热门电子元器件搜索 |
|
LTM4676A 数据表(PDF) 38 Page - Linear Technology |
|
LTM4676A 数据表(HTML) 38 Page - Linear Technology |
38 / 136 page LTM4676A 38 4676afa For more information www.linear.com/LTM4676A sequence is started. The resolution of the TON_MAX_ FAULT_LIMITn is 10µs. If the VOUT_UV_FAULT_LIMITn is not reached within the TON_MAX_FAULT_LIMITn time, the response of this fault is determined by the value of theTON_MAX_FAULT_RESPONSEncommandvalue.This response may be one of the following: n Ignore n Shut Down (Stop Switching) Immediately—Latch Off n Shut Down Immediately—Retry Indefinitely using the Time Interval Specified in MFR_RETRY_DELAYn This fault response is not deglitched. A value of 0 in TON_MAX_FAULT_LIMITnmeansthefaultisignored.The TON_MAX_FAULT_LIMITn should be set longer than the TON_RISEn time. It is recommended TON_MAX_FAULT_ LIMITn always be set to a non-zero value, otherwise the outputmaynevercomeupandnoflagwillbesettotheuser. See Table 28. RESPONSES TO SVIN OV FAULTS SVIN overvoltage is measured with the ADC; therefore, the response is naturally deglitched by up to the 90ms typical response time of the ADC. The fault responses are: n Ignore n Shut Down Immediately—Latch Off n Shut Down Immediately—Retry Indefinitely using the Time Interval Specified in MFR_RETRY_DELAYn See Table 28. RESPONSES TO OT/UT FAULTS Internal Overtemperature Fault/Warn Response An internal temperature sensor protects against EEPROM damage. Above 85°C, no writes to EEPROM are recom- mended. Above 130°C, the internal over temperature warn thresholdisexceededandthepartdisablesEEPROMwrites and does not re-enable until the temperature has dropped to 125°C. When the die temperature exceed 160°C the operaTion internal over temperature fault response is enabled and the PWM is disabled until the die temperature drops below 150°C. Temperature is measured by the ADC. Internal temperaturefaultscannotbeignored.Internaltemperature limits cannot be adjusted by the user. See Table 27. External Overtemperature and Undertemperature Fault Response Two temperature sensors within the LTM4676A are used to sense power stage temperature. The OT_FAULT_ RESPONSEnandUT_FAULT_RESPONSEncommandsare used to determine the appropriate response to an over- temperatureandundertemperaturecondition,respectively. The fault responses are: n Ignore n Shut Down Immediately—Latch Off n Shut Down Immediately—Retry Indefinitely using the Time Interval Specified in MFR_RETRY_DELAYn See Table 28. RESPONSES TO EXTERNAL FAULTS When either GPIOn pin is pulled low, the OTHER bit is set intheSTATUS_WORDcommand,theappropriatebitisset in the STATUS_MFR_SPECIFC command, and the ALERT pinispulledlow.Responsesarenotdeglitched.Eachchan- nel can be configured to ignore or shut down then retry in response to its GPIOn pin going low by modifying the MFR_GPIO_RESPONSEn command. To avoid the ALERT pin asserting low when GPIO is pulled low, assert bit 1 of MFR_CHAN_CONFIGn, or mask the ALERT using the SMBALERT_MASK command. FAULT LOGGING The LTM4676A has fault logging capability. Data is logged into memory in the order shown in Table 30. The data to be stored in the fault log is being continuously stored in |
类似零件编号 - LTM4676A |
|
类似说明 - LTM4676A |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
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 | 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 |