Sometimes, there are unexpected solenoid and excessive corrosion occurs on current sense circuit. Corrosive effects can be occurred because of the differential voltage between the ground and the load. To reduce that possibility, the shunt and the switch are placed on the high side. When switch is off, the battery is removed from the load, it will avoid damage from potential shorts to ground. However, the recirculating current measurement and diagnostic still allowed. Here is the schematic diagram of the circuit:
When the switch is on, the common-mode voltage increases the battery voltage because the battery voltage is connected to the load. When the switch is off, the common-mode voltage drop below the ground because of the voltage reversal that across the solenoid. [Circuit's schematic diagram source: Analog Application Note]
Possibly Related Articles:
- High Side Current Sensing for Low Side Switching
An AD8205 can be used to make a high-side current sense with a low side switch. Besides AD8205, an inductive load (solenoid) and a resistive shunt are added in this... - Current Sensing for High Voltage Application
High voltage current sensing/monitoring can be designed using LTC6101 op-amp. The following current sensing circuit is capable of measuring electrical current in 500 volts system. Here is the schematic diagram... - High-Side Current Sense Amplifier Coverts 4-20mA Signal to 0-5V
This is a simple circuit that can be used to convert a 4-20mA signal to a 0V to 5V analog voltage. It is ideal conversion to digital with an analog-to-digital... - Current Sense Circuit, A Classic Design Using Positive Rail Sensing
A LT1637 is advertised as 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp. This features are suitable for current sensing application since input voltages are right at the... - Self-Powered Current Sensing Circuit
This current sensing circuit sense the current at the high side (between positive supply and load). This circuit take the benefit of the microampere supply current and Rail-to-Rail input of... - Differential Current Sensing Inside H Bridge
A differential current sensing that is inserted inside a H bridge circuit. is shown in the schematic diagram below. This circuit is one example of AD8205 application. The AD8205 measures... - Temperature Measurement (Sensing) and Monitoring
Temperature measurement (sensing) and monitoring will be economical and straightforward if we apply the input of TC9400 V/F converter with a voltage from output of a probe, such as shown... - High Current Op-Amp for Motor Driver
The OPA2544 is a dual high-voltage/high-current operational amplifier. We can use it for driving a wide variety of high power loads. 2A output current is provided by this device and... - Foldback Current Limited High Voltage Regulator
This circuit is high voltage regulator which has foldback current limiter protection. This circuit uses LM10 comparator with voltage reference, and this core integrated circuit is connected directly to high... - LM2576 Switching Regulator
The circuits. To produce any output voltage, an external feedback resistors can be added. The sLM2576 is a Switching Regulator that can produce 15, 12, 5, 0r 3.3V output voltage... - Adjustable 1.5A Step Down 1.5 MHz Switching Regulator
Usually, when an high heating of the application environment is occurred due to the power dissipation, we use high current linear solution to solve that problem. But, we can solve... - Variable Power Supply Using Switching Regulator
If you are a hobbyist or a professional electronic engineer who make many electronic experiment, troubleshooting, or testing, providing wide range variable voltage power supply in your lab or workshop...
| 
