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L9908 データシート(PDF) 69 Page - STMicroelectronics |
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L9908 データシート(HTML) 69 Page - STMicroelectronics |
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69 / 152 page  Figure 43. Shoot-through protection on Ext. FET Vgs functional operation Note: VGS STD Filter integrates Vgs_LSn/Vgs_HSn timing overlap on multiple PWM periods, in this way STD Fault on Ext. FET Vgs can be detected also in case minimum timing overlaps are spread over multiple and not adjacent periods. The STD diagnosis can be disabled on the single half bridge by a dedicated SPI bit as follows: Table 63. Shoot-Through Protection on PWM inputs enable bit STPn_PWM_DIS Description 0 Shoot-through protection on PWM input enabled (Default) 1 Shoot-through protection on PWM input disabled Table 64. Shoot-Through Protection on Ext. FET VGS enable bit STPn_VGS_DIS Description 0 Shoot-through protection on FET Vgs enabled (Default) 1 Shoot-through protection on FET Vgs disabled The T_stp_flt configuration for the n-th pre-driver can be set by a dedicated SPI bit as follows: Table 65. Shoot-Through Protection on PWM inputs filtering configuration bits STPn_PWM_CFG1 STPn_PWM_CFG0 Description 0 0 0.2 μs (Defaults) 0 1 0.5 μs 1 0 1 μs 1 1 1.5 μs Table 66. Shoot-Through Protection on Ext. FET VGS filtering configuration bits STPn_VGS_CFG1 STPn_VGS_CFG0 Description 0 0 0.2 μs (Defaults) 0 1 0.5 μs L9908 Functional description DS13546 - Rev 5 page 69/152 |
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