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STPM098C 数据表(PDF) 25 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 110 page  <FLT_REF>_FAULT_RESPONSE1 <FLT_REF>_FAULT_RESPONSE Description 1 1 Latched with active pull-down - enables active pull- down first and disable all PWM outputs subsequently; the device moves to SAFE_HIZ mode (default)(3) 1. Fault danger for the application is considered low. The fault can be ignored with no corrective action applied neither internal or external. 2. Fault danger for the application is considered high. The corrective action shall be taken as soon as it is detected by the device by establishing SAFE_HIZ. 3. Fault danger for the application is considered high. The corrective action shall be taken as soon as it is detected by the device by activating an active pull-down and successively establishing SAFE_HIZ. 3.4.1.2 Fault output redirection (FOR) STPM098C implements a multiple source of fault signaling by means of pins FAULT, SM_ALERT, VRRDY1/2, VR_HOT, POWERIN_ALERT and through a dedicated PMBus™ flag. Fault output redirection pins are asserted LOW while the PMBus™ flag is set to ‘1’ each time an LTC fault is detected according to the following table. Note: While the PMBus™ flag is always asserted in case of fault event, the pin signaling is strictly related to fault reaction. Pin signaling of a fault is only active if the fault has a configurable or nonconfigurable LTC reaction. Table 21. FOR summary PMBus™ flag signaling Source diagnosis Fault output pin signaling Fault description INT_RST = 1 VREF1 monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Undervoltage on VREF1 INT_RST = 1 VREF1 monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Overvoltage on VREF1 INT_RST = 1 VREF1 monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Overtemperature on VREF1 VREF2_UV = 1 VREF2 monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Undervoltage on VREF2 VREF2_OV = 1 VREF2 monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Overvoltage on VREF2 VREF2_UV = 1 VREF2 monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Overtemperature on VREF2 VCC_UV = 1 VCC monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Undervoltage on VCC VCC_OV = 1 VCC monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Overvoltage on VCC INT_RST = 1 ICM FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Main clock stuck violation CLK_MISMATCH = 1 CLK1_TIME_OUT = 1 CLK2_TIME_OUT = 1 ICM FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Oscillators mismatch or auxiliary clock stuck violation AGND_LOSS = 1 DGND_LOSS = 1 GLM No pin signaling Loss of power or signal grounds OT_SD = 1 OTM FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Thermal shutdown OTM_WR = 1 OTM No pin signaling Thermal warning VIN_UV = 1 VIN monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Input Overvoltage IIN_OC = 1 IIN monitor FAULT = SM_ALERT = VRRDY1 = VRRDY2 = 0 Input over-current STPM098C Functional description DS14440 - Rev 1 page 25/110 |
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