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发明公开
CN109981005A 一种直流风机驱动电路及使用该驱动电路的直流风机 无效 - 驳回

一种直流风机驱动电路及使用该驱动电路的直流风机
摘要：
本发明公开了一种直流风机驱动电路及使用该驱动电路的直流风机。直流风机驱动电路包括用于将直流电压端VCC降压至直流风机驱动电压端V+‑FAN的降压斩波拓扑主电路、用于将主控芯片的直流风机驱动信号端FAN‑DRV进行功率放大和电平转换的MOS管驱动电路、用于对直流风机进行堵转检测的风机堵转检测电路。本发明技术方案提高了电压转换效率，简化堵转检测电路设计，提高检测电路的抗干扰能力。
摘要（英）：

The invention discloses a DC fan driving circuit and a DC fan applying the driving circuit. The DC fan driving circuit comprises a buck chopper topology main circuit, an MOS transistor driving circuitand a fan blocking detection circuit, wherein the buck chopper topology main circuit is used for bucking DC voltage terminal VCC to DC fan driving voltage terminal V+_FAN, the MOS transistor drivingcircuit is used for carrying out power amplification and level conversion on DC fan driving signal terminal FAN_DRV of a main control chip, and the fan blocking detection circuit is used for carryingout blocking detection on the DC fan. The technical scheme of the invention improves the voltage conversion efficiency, simplifies the design of the blocking detection circuit and improves the anti-interference ability of the detection circuit.

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