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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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L9908 数据表(PDF) 70 Page - STMicroelectronics |
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L9908 数据表(HTML) 70 Page - STMicroelectronics |
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70 / 152 page  STPn_VGS_CFG1 STPn_VGS_CFG0 Description 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. Figure 44. n-th Current Monitor Channel simplified block diagram Each current monitor channel can be used to measure positive or negative motor current flow through single (DC Link) or multiple (Single Leg) shunts system configurations. Figure 45. External Shunts Configurations a) DC-Link, b) 2xSingle Leg + DC-Link, c) 3xSingle Leg The specific n-th current monitor channel can be disabled by a dedicated SPI bit in the SAFETY_RELEVANT2 register, as follows: L9908 Functional description DS13546 - Rev 5 page 70/152 |
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