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L9908 データシート(PDF) 70 Page - STMicroelectronics |
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L9908 データシート(HTML) 70 Page - STMicroelectronics |
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70 / 153 page  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 1 0 1 μs 1 1 1.5 μs Table 67. Shoot-Through Protection accuracy Symbol Parameter Test Condition Min Typ Max Unit STP_pwm_tflt_acc PWM Shoot-through Filter Time accuracy CLK_SSM_EN = 0 -10 - 10 % STP_vgs_tflt_acc VGS Shoot-through Filter Time accuracy CLK_SSM_EN = 0 -10 - 10 % Note: All parameters are guaranteed, and tested, in the voltage ranges reported above in Table 5 unless otherwise specified. Where not specified the parametrical operating range equals the functional operating range. 5.13 Current monitors L9908 implements three identical and independent current monitor channels. The motor current converted by an external shunts resistance into a differential voltage VIN is measured through the input pins Isn+ and Isn- (VIN = Isn+ - Isn-). A current sense amplifier (CSA) is used to amplify the ground referenced differential voltages then converted via an internal 11-bit ADC. The current information is made available either in digital form through SPI register readout or reconverted in analog form through an 11-bit DAC at CSO_n pin. L9908 Current monitors DS13546 - Rev 3 page 70/153 |
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