lite.tbo: the bipolar HV-pulser

What does it look like?

Information

What is it supposed to do?

The aim of this echOmod is to get the HV Pulse done.

How does it work: block diagram

• Pulse-P->TC6320TG
• Pulse-N->TC6320TG
• Damper->TC6320TG
• NMT0572SC->HV-N->TC6320TG
• NMT0572SC->HV-P->TC6320TG->ITF-mET_Transducer
• ITF-mET_Transducer->ITF-mET_SMA
• ITF-mET_Transducer->ITF-18_Raw

About the module

Pros

• Cheaper, more robust than tobo
• Less issues with the MD0100

Cons

• As of today (20180305), the damper still lacks

Constraint and limits

Testing

First tests are here

Brief

Specs

• Needed to get a couple of 10's of ns wide square pulses, both in the positive and negative.
• Control of pulses must be through 3.3 or 5V tolerant logic
• Pulses height must be selectable (say with a jumper?) for ~20V, 40V, 80V (for positive pulses).
• Only power supply available is 5V

Components

• See this application note - recommend MD1213 and TC6320
• Possible (but not used in the end) high voltage source: https://datasheets.maximintegrated.com/en/ds/MAX5025-MAX5028.pdf (3 -> 30V) to be used with a 555 DC-DC convertor
• Signal back from the diod is clipped by MD0100 + back to back diods.

Build docs

• Source files
  • Schematics
  • BOM
  • Gerbers
  • ODB
  • Pickplace

Power use

• Needs only 5V

Components

• HV: NMT0572SC
• Pulser : MD1213 and TC6320 -> see Fig.6 here, bipolar 3 level pulser.
  • TC6320, undamped, detailed here.
  • TC6320 http://ww1.microchip.com/downloads/en/DeviceDoc/20005697A.pdf for the datasheet
• Protection: MD0100+diods -- should be enough, see bottom of page 1, or Fig 9

Discussions

TODO

• Review a bipolar design (originally alt.tbo -- but double the components and hence the price)

DONE

• Preliminary testing

People

• Ivan for the TC6320TG