Load driving circuit and method and electronic equipment
The invention discloses a load driving circuit and method and electronic equipment, the load driving circuit is connected with a load, and the load driving circuit comprises a control unit, an output driving unit, an analog-to-digital conversion unit, a first voltage dividing unit, a second voltage...
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| Hauptverfasser: | , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a load driving circuit and method and electronic equipment, the load driving circuit is connected with a load, and the load driving circuit comprises a control unit, an output driving unit, an analog-to-digital conversion unit, a first voltage dividing unit, a second voltage dividing unit, a reference unit and a power switch tube. According to the invention, the analog-to-digital conversion unit carries out voltage division sampling on the first voltage division unit and the load, carries out voltage division sampling on the second voltage division unit and the reference unit, and feeds back to the control unit; and the control unit calculates the resistance value of the load according to the first divided voltage and the second divided voltage obtained by sampling and the resistance value of the reference unit. Compared with the prior art that a microcontroller integrated with a current source is adopted to carry out short circuit detection on a product driven by a high-power load, th |
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