RC10Kicker1Errata

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Revision as of 02:27, 3 July 2010 by AndyB (talk | contribs) (Created page with 'The prototype was manufactured on a barebones process so some errors have been incurred as a result. ==Current Limit== The current limit measures current through the silicon not...')
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The prototype was manufactured on a barebones process so some errors have been incurred as a result.

Current Limit

The current limit measures current through the silicon not through the solenoid. When using the circuit

  1. The IGBT switches on
  2. The IGBT switches off when a programmed current limit has been reached. Thanks to the flyback diode, that current still runs in the solenoid.
  3. Thus, when the IGBT switches on again (nearly instantaneously) it sees the current running in the flyback/solenoid + new current. This destroys the silicon

The solution is to measure the

Barebones Layout Issues

  • Traces running under isolated power supply can be shorted on mounting feet of supply

Mechanical Issues

  • Solenoid connector interfere with underlying screw
  • Battery connector interferes with underlying screw

Misc

  • Fuses soldered into holders

Future Features

  • Space to add additional IGBT with separate gate drive resistor for each output