PCB circuit board layout of pressure control unit.
Abstract/Contents
- Abstract
- We have designed a control circuit board as a PCB board layout using EAGLE Layout Editor 6.4.0 and ordered the printed PCBs to Sierra Circuit Inc as a two-layer board (no touch PCB). The operating current and voltage of the valves are 0.375 A and 24 V. The n-channel MOSFET (metal–oxide–semiconductor field-effect transistor) is selected, which has a maximum rating of 12 A continuous drain current, ID-static, 30 A pulsed drain current, ID-pulsed, and 60 V Drain−Source Voltage, VDSS. To serve as a power driver of inductor-based loads, a diode is inversely connected from power 24 V to the drain of MOSFET, which helps to avoid the voltage shock due to the inertia of an inductor when the gate is suddenly closed. We used a fast-recovery rectifier diode to achieve a fast recovery time of 150 nanoseconds at 50 V peak repetitive reverse voltage (VRRM) and 30 A peak surge current (IPS). Here, we chose a low-side drive, i.e., we located a switch between load and ground or a negative power. We used this approach of low-side drive because the low-side drive is simpler and easier to implement. A high-side drive requires additional MOSFET components when the logic level and drive voltage don't match, which is our case (5 V and 24 V, respectively). In addition, p-channel MOSFETs have nearly three times more resistance than the n-channel MOSFRET with the similar ratings. However, the low-side drive can suffer from noise and voltage leakages because a positive supply voltage is still connected to the load during the off state (LO state). Even if bandwidth remains the same, one can implement a high-side drive when long-term stability is required.
Description
| Type of resource | software, multimedia |
|---|---|
| Date created | [ca. August 30, 2011 - May 1, 2013] |
Creators/Contributors
| Author | Sim, Joo Yong |
|---|---|
| Primary advisor | Pruitt, Beth L. |
| Contributing author | Saraf, Sanjay |
Subjects
| Subject | PCB board design |
|---|---|
| Subject | strain array controller |
| Subject | pressure controller |
| Subject | the mechanical engineering at Stanford University |
Bibliographic information
| Related Publication | Simmons CS, et al. (2011) Integrated strain array for cellular mechanobiology studies. J Micromech Microeng 21(5):054016. http://dx.doi.org/10.1088/0960-1317/21/5/054016 |
|---|---|
| Related Publication | Sim JY, et al. (2012) Uniaxial cell stretcher enables high resolution live cell imaging. 2012 IEEE 25th International Conference on Micro Electro Mechanical Systems (MEMS), pp 854–857. |
| Location | https://purl.stanford.edu/mp860kf0560 |
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- Use and reproduction
- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
Collection
Stanford Research Data
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- Contact
- simba85@stanford.edu
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