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resources:eval:user-guides:pioneer1-wiredcbm [15 Feb 2021 16:36]
Richard Anslow [Change Log]
resources:eval:user-guides:pioneer1-wiredcbm [16 Feb 2021 10:34]
Richard Anslow
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 {{ :​resources:​eval:​user-guides:​13.png |}} {{ :​resources:​eval:​user-guides:​13.png |}}
  
-The VDROOP, VPEAK, and TDROOP are measured using the Figure ​10 and 11 LTspice waveform. The L and C values are then calculated using equations 2 and 4. It depends where you measure on the waveform, however, the calculated L value is 1 to 3mH as shown in Table 1. Measuring at point X is most accurate and yields the correct inductance value of approximately 1 mH. The high pass filter frequency (equation 6) is simply a function of the droop time and voltage, and for point X is approximately equates to 250 kHz/32 for 1 bit (half clock cycle), which matches the input waveform (V3) shown in the Figure 10 schematic.+The VDROOP, VPEAK, and TDROOP are measured using the Figure 11 and 12 LTspice waveform. The L and C values are then calculated using equations 2 and 4. It depends where you measure on the waveform, however, the calculated L value is 1 to 3mH as shown in Table 1. Measuring at point X (Figure 12) is most accurate and yields the correct inductance value of approximately 1 mH. The high pass filter frequency (equation 6) is simply a function of the droop time and voltage, and for point X is approximately equates to 250 kHz/32 for 1 bit (half clock cycle), which matches the input waveform (V3) shown in the Figure 10 schematic.
  
 **Table 1** **Table 1**
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 When simulating Figure 10 it is also worth noting that the C8 capacitor is recommended to reduce voltage overshoot at the sensor (Vpout at power extraction node). With C8 added the overshoot is maximum 47mV and settles to within 1mV of the desired 5VDC within 1.6ms. Simulating without a C8 capacitor results in an underdamped system, with 600mV overshoot, and a permanent 100mV of voltage oscillation from the 5V dc target. When simulating Figure 10 it is also worth noting that the C8 capacitor is recommended to reduce voltage overshoot at the sensor (Vpout at power extraction node). With C8 added the overshoot is maximum 47mV and settles to within 1mV of the desired 5VDC within 1.6ms. Simulating without a C8 capacitor results in an underdamped system, with 600mV overshoot, and a permanent 100mV of voltage oscillation from the 5V dc target.
  
 +LTSpice models are available here:
 +{{ :​resources:​eval:​user-guides:​podl_article.zip |click here to download}}
  
 ===== Change Log ===== ===== Change Log =====
  
 *July 2019. Initial Release. *July 2019. Initial Release.
 +
 *August 2019. Added additional information on demo power supply configuration. *August 2019. Added additional information on demo power supply configuration.
 +
 *February 2021. Added LTspice models for engineered power. *February 2021. Added LTspice models for engineered power.
  
resources/eval/user-guides/pioneer1-wiredcbm.txt · Last modified: 16 Feb 2021 10:34 by Richard Anslow