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STPM098C 数据表(PDF) 96 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 96 Page - STMicroelectronics |
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96 / 110 page  3.16.2 Safe state activation The safe state activation is established through two separate paths. Figure 80. Safe states activation paths VRn_EN PWMn CLK1_TIME_OUT Logic Activation Path Damage Protected Activation Path Safe Switch-off Main Logic HV HV HV HV HV SAFE_SW_ECHO Fault Management Unit PWMn PWMn ….. Logic activation path: safe state activation is carried out entirely by the main logic. This path is used to enter SAFE ‑HIZ state except if it is determined by CLK1_TIME_OUT and VREF1_UV/OV. Damage protected activation path: in case of device failure where the internal main logic integrity is compromised, STPM098C implements an isolated safe switch off structure which allows it to activate through a separated path. This path is used to generate: • VREF1_OV • VREF1_UV • CLK1_TIME_OUT The safe state activation through the damage protected path is signaled by setting to ‘1’ the dedicated PMBus™ read only register SAFE_HIZ_ECHO. STPM098C Functional description DS14440 - Rev 1 page 96/110 |
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