How are lossless current sensing techniques used in DC converters?
How are lossless current sensing techniques used in DC converters?
Lossless current-sensing methods address this issue by sensing the current without dissipating the power that passive resistors do. Six available lossless current sensing techniques are reviewed. A new scheme for increasing the accuracy of current sensing when the discrete elements are not known is introduced.
How is current sensing used in smart power chips?
Current sensing is one of the most important functions on a smart power chip. Conventional current-sensing methods insert a resistor in the path of the current to be sensed. This method incurs significant power losses, especially when the current to be sensed is high.
Why do we need a current sensing system?
Current sensing solutions add valuable safety and protection features to system designs. They provide information to control current in power systems and avoid overheating and short circuits. Current sensing is also an essential part of energy metering to ensure power-efficiency and minimize environmental impact.
Are there any amplifiers that can sense low voltages?
Able to sense very low drop voltages as low as 10 mV, our TSC2010, TSC2011 and TSC2012 high-voltage bidirectional current sense amplifiers (available both as Automotive and Industrial grade) can sense the current thanks to a shunt resistor over a wide range of common mode voltages from –20 to + 70 V, regardless of the supply voltage.
When does the fuel injector dip and close?
That dip is the point where the fuel injector is actually opening and starting to spray fuel. And then this is a current limited injector. So once it gets to a set current that the PCM dictates, it’s just going to level off and then close at the same time that the injector closes.
Lossless current-sensing methods address this issue by sensing the current without dissipating the power that passive resistors do. Six available lossless current sensing techniques are reviewed. A new scheme for increasing the accuracy of current sensing when the discrete elements are not known is introduced.
How are DC offsets solved for linear sensors?
Switching the current paths, from 0° to 90°, at a high repetition rate offers a new answer to the (intrinsic) DC offset that has long plagued linear sensor IC operation and stability. Sample-and-hold circuitry and a low-pass filter are exploited to properly ‘recondition’ the internal dynamic signals of these innovative linear HEDs.
What’s the pulse width of a fuel injector?
Measurement at cursor two is roughly ground, so it’s going to change slightly from depending on where we put it. That’s pretty darn close to ground so if I take cursor one and put it there, and cursor two and put it at the end of that ground period, that’s going to give us our injector pulse width; 2.2800000000000002 milliseconds in this case.
