Electromagnetic valve driving circuit of electronic unit pump, and control method thereof

The invention discloses an electromagnetic valve driving circuit of an electronic unit pump and a control method thereof, and belongs to the technical field of engine electronic control. The driving circuit comprises a power source, a DC/DC boosting module, a MOS tube QA, a high-end driving chip, a diode DA, a MOS tube QB, a low-end driving chip, an electromagnetic valve, a diode DB, a hall current sensor and a single chip; the MOS tube QA is controlled under a high-end control signal output by the PWM module of the single chip, and matched with a current feedback signal output by the single chip PWM module, so as to modulate the circuit driving voltage; the MOS tube QB is controlled by a low-end control signal output by the single chip PWM module, so as to control the circuit on-off, set up a follow current loop and realize rapid flow discharge. The driving circuit applies the hall current sensor, and has the advantages of few response times, small temperature drift, good output linearity and high durability