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Several points to be noted in the planning of low-temperature plasma power integrity power system

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07 Jan,2022

Several points to be noted in the planning of low-temperature plasma power integrity power system:
Analysis of low-temperature plasma power integrity power system noise margin Most chips will give a normal operating voltage range, usually ±5%. The output voltage accuracy of the traditional voltage stabilizer is generally ±2.5%, so the peak amplitude of the power supply noise should not be greater than ±2.5%. Accuracy is conditional, including load conditions, working temperature and other restrictions, so there must be margin.
Second, the calculation of the noise margin of the low-temperature plasma power supply of the whole machine.
For example, the normal working voltage of the chip is 3.13V to 3.47V, and the nominal output of the voltage regulator chip is 3.3V. The whole machine is installed on the circuit board, and the power supply voltage regulator chip of the whole machine outputs 3.36V. Then, the allowable voltage change range is 3.47-3.36=0.11V=110 millivolts. The output accuracy of the voltage stabilizer is ±1%, that is, ±3.363*1%=±33.6 mV. The power system noise margin is 110-33.6=76.4 millivolts.
3. How does the power supply noise of the low-temperature plasma power supply rectifier generate?
The output of the stabilized power supply chip itself is unstable and will fluctuate to a certain extent. The second is that the regulated power supply cannot respond to the rapid changes in the current requirements of the load in real time. The rectifier power supply stabilized power supply chip senses the change of its output voltage and adjusts its output current to return it to the rated output voltage. Third, the voltage drop caused by the load transient current on the impedance of the power path and the impedance of the ground path. The pins and pads themselves will have parasitic inductance. When the transient current flows through the channel, a voltage drop will inevitably occur. Therefore, power integrity Therefore, the voltage at the power supply pin of the load chip will fluctuate with the change of the transient current, which is the power supply noise generated when impedance occurs.