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AN2785 Datasheet(PDF) 20 Page - STMicroelectronics |
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AN2785 Datasheet(HTML) 20 Page - STMicroelectronics |
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20 / 51 page  Application examples AN2785 20/51 Doc ID 14785 Rev 1 Figure 13. L6393 application circuit for voltage mode FAN controller (linear hall sensor) Figure 14 shows some waveforms related to the presented circuit. VCC CP- CP+ SD GND VBOOT HVG OUT LVG DT CPOUT L6393 VCC CP- CP+ SD GND VBOOT HVG OUT LVG DT CPOUT L6393 +5V +5V Rotation Detection +5V Vth RMI +12V +5V +12 ÷ 600V PWM Comparator Minimum Speed Generation Triangle Generator +12V +12V Vlim Over Current Disable Time +5V H FG Dead Time Setting Dead Time Setting RD Linear HALL Sensor PHASE BRAKE PHASE BRAKE PHASE BRAKE SD HVG LVG PHASE BRAKE SD HVG LVG + _ +5V COMPARATOR Logic + Drivers Logic + Drivers Full Bridge Power Stage Motor Load Vbus EQUIVALENT CIRCUIT USING L6393 DRIIVERS SD SD Over Current Protection Vlim Vth + _ +5V COMPARATOR PWM Comparator SD SD +5V H Linear HALL Sensor + _ +5V COMPARATOR BIPOLAR TRANSISTOR Signal Inverter +5V RMI Minimum Speed Generation OPAMP L6393 L6393 Sensor Comparator +12V Triangle Generator |
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