Fast solenoid driver circuit

Solenoid driver with free-wheeling diode This is the simplest and easiest way to drive a solenoid. The inductive energy of the solenoid decays through a diode up to the battery voltage. The schematic is shown on Fig. 4 and the solenoid current and its reference is shown in Fig. 5. The pass transistor applies voltage to the solenoid and the series RC. The circuit turns on the solenoid in the exact same way as Figure 1. The difference is that when this solenoid turns off, the current in the solenoid is routed through two 1N diodes. But these two diodes also have a base-emitter junction and two Ω resistors in parallel.  · The beauty of this circuit is that it will hit the solenoid with a higher voltage to pull it in fast, but then lower the voltage and current goes through it Estimated Reading Time: 9 mins.

Simple Solenoid Drivers The simplest way to drive a solenoid is to switch the current on and off. This is often done with a low-side MOSFET switch and current recirculation diode (Fig. 3). through the solenoid. This driver type uses one MOSFET to forward drive the solenoid and another to recirculate current. This configuration is suited for high-speed operations (kHz or higher), and allows for both high-side and low-side driving. Another advantage of using a push-pull driver configuration is that. The beauty of this circuit is that it will hit the solenoid with a higher voltage to pull it in fast, but then lower the voltage and current goes through it so the solenoid does not heat up too.

The device is selfprotected against short circuit at the outputs and overtemperature. For each channel, one independent push-pull status output is used for a. A redundant overcurrent limit circuit continuously monitors solenoid current, latching off and notifying the controller when tripped, protecting the solenoid in. The authors have designed and manufactured an electronic valve driving circuit with fast response characteristics by using a 3 power source. In experiments.