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UM0971 데이터시트(PDF) 2 Page - STMicroelectronics |
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UM0971 데이터시트(HTML) 2 Page - STMicroelectronics |
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2 / 45 page ![]() Contents UM0971 2/45 Doc ID 17701 Rev 1 Contents 1 STEVAL-IHM031V1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 Electrical and functional characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.2 Target application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3 Safety and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3.2 Demonstration board intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3.3 Demonstration board installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3.4 Electronic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3.5 Demonstration board operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 Board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 System architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2.1 LD1117xx33 and LD1117xx50 characteristics . . . . . . . . . . . . . . . . . . . . 9 2.2.2 L4976 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.2.3 Inverse polarity protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.3 Gate driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.4 Three-phase inverter power switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.4.1 STS8DNH3LL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.5 BEMF conditioning network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.5.1 Zero-crossing methods for BEMF reading . . . . . . . . . . . . . . . . . . . . . . . 16 2.5.2 Low amplitude BEMF signal amplification . . . . . . . . . . . . . . . . . . . . . . . 16 2.5.3 Virtual neutral (or natural) point reconstruction . . . . . . . . . . . . . . . . . . . 17 2.6 Current sensing and conditioning network . . . . . . . . . . . . . . . . . . . . . . . . 18 2.6.1 Bipolar current reading configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.6.2 Unipolar current reading configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.6.3 Three-shunt current reading configuration . . . . . . . . . . . . . . . . . . . . . . . 21 2.6.4 Single-shunt current reading configuration . . . . . . . . . . . . . . . . . . . . . . 21 2.6.5 Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.7 Temperature sensing and protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3 Descriptions of connectors and jumpers . . . . . . . . . . . . . . . . . . . . . . . 24 3.1 Jumper description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 |
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