The invention relates to the technical field of chip surge protection, and especially relates to a circuit and a method for suppressing surge current of a high-side driver. The high-side driver, an MCU, an overcurrent protection module, a current limiting circuit and a diode D1 are arranged; the high-side driver is used for driving a load capacitor CL and a load resistor RL; the current limiting circuit is used for limiting the starting current of the high-side driver and suppressing surge; the overcurrent protection module is used for turning off the high-side driver when a short-circuit fault occurs between the load capacitor CL and the load resistor RL; and the MCU is used for opening or closing the high-side driver and outputting a protection command when the short-circuit fault occursbetween the load capacitor CL and the load resistor RL. According to the invention, the problem that the high-side driver is turned off due to the overcurrent protection action of the overcurrent protection module caused by overlarge surge current of the load at the moment of turning on the high-side driver is solved; and compared with like circuits in the prior art, the circuit of the inventionhas the advantages that the components occupy smaller space of the circuit board, the cost is lower, and the reliability is higher.
本发明涉及芯片浪涌保护技术领域,尤其涉及一种抑制高边驱动器浪涌电流的电路及方法,通过设置高边驱动器、MCU、过流保护模块、限流电路、二极管D1;所述高边驱动器用于驱动负载电容CL与负载电阻RL;所述限流电路用于限制高边驱动器的启动电流,防止浪涌;所述过流保护模块用于在负载电容CL与负载电阻RL出现短路故障时,关闭高边驱动器;所述MCU用于打开或关闭高边驱动器,且在负载电容CL与负载电阻RL出现短路故障时,输出保护命令。本发明解决了高边驱动器开启瞬间因负载的浪涌电流过大导致过流保护模块进行过流保护动作而关闭高边驱动器的问题,且相较于现有技术所用元件占电路板的空间较小,成本较低,可靠性较高。
Circuit and method for suppressing surge current of high-side driver
一种抑制高边驱动器浪涌电流的电路及方法
2021-02-23
Patent
Electronic Resource
Chinese
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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