What is a high side solenoid?
What is a high side solenoid?
The duty cycle of the high-side switch determines the current flowing through the solenoid, which in turn controls the travel range of the plunger. At the time when the high-side switch is turned off, the current flows through the flyback diode forcing the common voltage to drop one diode drop below ground.
What is a high side current monitor?
Common to all high-side IC monitors from Maxim is an ability to provide ground-referenced voltage or current outputs with few or no additional components. The output signal is proportional to the measured high-side current, which can have a common-mode voltage as high as 32V.
Why are high side drivers used?
High-Side vs. The low-side driver is often used for powertrain-related loads such as motors, solenoids, and heaters. The high-side driver is used for fuel pumps, and body-related functions such as seats, lighting, wipers, and fans.
What is high side current?
High-side current sensing has the benefit of being able to detect current related faults, such as short-circuits or an open circuit that could affect the load. Also, with high-side current sensing, the load can be referenced directly to ground, as we’ll explore later.
What is a high side driver?
A high side driver is one in which the switching element is between Vcc and the load. A low side driver is one in which the switching element is between the load and common. A self-contained load such as a DC motor, solenoid/relay, light or LED string, can usually be drive.
What’s the difference between high side and low side current sensing?
The difference is based off on the location of the sense resistor. Low side sensing is between load and ground, with high side sensing between power and the load. A high side current sensor, with a precision trimmed preset gain of either 20, 50, or 100.
How does a current sense amplifier work?
Current sense amplifiers are also called current shunt amplifiers because it uses a shunt resistor in the power rail that provides a small voltage drop when current flows through the resistor. This voltage drop is converted and amplified by the current sense amplifier into the small output voltage.
When would you use a high side switch?
High-side switching is the preferred switching technique in situations where short circuits to ground are likelier to occur than short circuits to the positive power line. Think for instance of cars or machines where most of the structure or body is connected to ground.
How do we sense current?
The most common way to measure current is to sense the voltage drop across a shunt or current-sense resistor. To achieve a highly accurate measurement of the current, you’ll need to examine the parametric values of both the resistor and current-sense amplifier.
What causes high side crash?
High Side Motorcycle Wrecks When another vehicle hits you just enough to cause the rear wheel to lose traction, or if the wheel loses traction on oil or sand on the road, the bike could start wobbling. The tighter you hold onto the handlebars, the worse it gets.
How do you drive a high side MOSFET?
Here when the high-side MOSFET is off, a capacitor is charged from the driving voltage. The capacitor charges through the load or a supporting low-side MOFSET. When the high-side MOSFET is to be turned on/driven, the voltage on the capacitor is used to drive the high-side MOSFET.
Which is an example of a high side current sense?
Figure 1. High-side current sense. The circuit in Figure 1 shows a typical example of high-side current sense. Negative feedback tries to force the voltage V SENSE upon gain resistor R GAIN. The current through R GAIN flows through P-channel MOSFET (PMOS) to resistor R OUT, which develops a ground referenced output voltage.
Who is the expert in high side current sensing?
Neubean, a young applications engineer, looks to test if it is actually necessary to place a 100 Ω resistor in front of a MOSFET gate for stabilization. Gureux, an applications engineer with 30 years of experience, monitors his experiments and gives his expert opinion along the way. Figure 1. High-side current sense.
Which is high side MOSFET driver for SMPS?
The MIC5021 high-side MOSFET driver is designed to operate at frequencies up to 100 kHz (5 kHz PWM for 2% to 100% duty cycle) and is an ideal choice for high speed applications such as motor control, SMPS (switch mode power supplies), and applications using IGBTs. The MIC5021 can also operate as a circuit breaker with or without automatic retry.
