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MCT8317A Datasheet(PDF) 51 Page - Texas Instruments |
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MCT8317A Datasheet(HTML) 51 Page - Texas Instruments |
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51 / 161 page  time to allow the inductive current to decay to zero) before transitioning into Hi-Z by turning OFF the remaining MOSFETs. If high-side modulation was active, prior to motor stop command, then the high-side MOSFET is turned OFF on receiving motor stop command and the current recirculation takes place through low-side MOSFET (see example Figure 8-38). Once the recirculation time lapses, the low-side MOSFET also turns OFF and all MOSFETs are in Hi-Z state. M VM HSA LSA HSB LSB HSC LSC M VM HSA LSA HSB LSB HSC LSC Driving State Low-Side Recircula on Mode Figure 8-38. Low-Side Recirculation If low-side modulation was active, prior to motor stop command, then the low-side MOSFET is turned OFF on receiving motor stop command and the current recirculation takes place through high-side MOSFET (see example Figure 8-39). Once the recirculation time lapses, the high-side MOSFET also turns OFF and all MOSFETs are in Hi-Z state M VM HSA LSA HSB LSB HSC LSC M VM HSA LSA HSB LSB HSC LSC Driving State High-Side Recircula on Mode Figure 8-39. High-Side Recirculation 8.3.17.3 Low-Side Braking Low-side braking mode is configured by setting MTR_STOP to 010b. When a motor stop command is received, the output speed is reduced to a value defined by ACT_SPIN_BRK_THR prior to turning all low-side MOSFETs ON (see example Figure 8-40) for a time configured by MTR_STOP_BRK_TIME. If the motor speed is below ACT_SPIN_BRK_THR prior to receiving stop command, then the MCT8317A transitions directly into the brake state. After applying the brake for MTR_STOP_BRK_TIME, the MCT8317A transitions into the Hi-Z state by turning OFF all MOSFETs. www.ti.com MCT8317A SLLSFQ2 – JANUARY 2023 Copyright © 2023 Texas Instruments Incorporated Submit Document Feedback 51 Product Folder Links: MCT8317A |
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