RC10KickerElectronics

Systems

Voltage Sense

We will have isolated voltage feedback. The voltage will be transmitted via a SPI ADC over a digital isolator.

ADC

Vendor - Digikey

Vendor Part Number - MCP3001T-I/SNCT-ND

Manufacturer - Microchip

Manufacturer Part Number - MCP3001

Cost - $1.96

datasheet

digikey

Charger

LT3750 Design from previous, with modifications to support ~9.5A peak charge current

FET

FET FQB34N20 overkill - but needed after the fire on rev 1 - 2007

Vendor - Digikey

Vendor Part Number - FQB34N20TM_AM002CT-ND

Manufacturer - Fairchild

Manufacturer Part Number - FQB34N20TM_AM002

Cost - $2.47

datasheet

digikey

LT3750

Vendor - Digikey

Vendor Part Number - LT3750EMS#PBF-ND

Manufacturer - Linear

Manufacturer Part Number - LT3750

Cost - $7.00

datasheet

digikey

Caps

We are gonna shoot for between 4000-5000uF by using two of the following

Vendor - Digikey

Vendor Part Number - P13180-ND

Manufacturer - Panasonic

Manufacturer Part Number - ECE-T2EP272EA

Cost - $12.86 quant 10

Description - 2700uF kicker capacitors

datasheet

digikey

Trigger

The trigger system discharges the stored energy in the caps to either the chipper or kicker

IGBT

Rated 330V 180A. One for kicker, one for chipper

Vendor - Digikey

Vendor Part Number - FGA180N33ATTU-ND

Manufacturer - Fairchild

Manufacturer Part Number - FGA180N33ATTU

Cost - $3.39

digikey

Fairchild FGA180N33ATDTU link

IGBT Driver

Non-inverting MOSFET 1.5A Drivers

Vendor - Digikey

Vendor Part Number - TC4427ACOA-ND

Manufacturer - Microchip

Manufacturer Part Number - TC4427

Cost - $1.01

digikey

datasheet

Current Limit

To try to save our silicon, we have decided to try to limit the current using a sense resistor, a comparator, and some logic.

Current Sense Resistor

Vendor - Digikey

Vendor Part Number - FCSL90R010FERCT-ND

Manufacturer - Ohmite

Manufacturer Part Number - FCSL90R010FER

Cost - $1.20

digikey

datasheet

Comparator

Vendor - Digikey

Vendor Part Number - MAX932CSA+-ND

Manufacturer - Maxim

Manufacturer Part Number - MAX932

Cost - $3.15

digikey

datasheet

Isolation

We need to isolate the voltage sense, and the kick signals. This gives

• Sense (SPI)
  • CLK - IN
  • CS - IN
  • Dout - OUT
• Trigger
  • Chip - IN
  • Kick - IN

So we need 4/1 in/out isolation

Isolator

Vendor - Mouser

Vendor Part Number - 634-SI8451AA-A-IS1

Manufacturer - Si Labs

Manufacturer Part Number - SI8451AA-A-IS1

Cost - $2.43

mouser

datasheet

Power Supply

The DC/DC converter needs to power the

• ADC - 5V 500uA
• Isolation - 5V 6mA
• Comparator - 5V 5mA (ballpark)
• Comparator Logic - 5V 5mA (7400 series logic, probably almost nothing)
• IGBT driver - 12V 10mA (be sure to bypass Vbat with 4.7uF ceramic, 47uF tantalum)

So lets shoot for around 5V 50mA LDO and around 12V 100mA DC/DC converter

Isolated DC/DC Converter

Vendor - Digikey

Vendor Part Number -

Manufacturer -

Manufacturer Part Number -

Cost -

[ digikey]

[ datasheet]

5V 50mA LDO

Vendor - Digikey

Vendor Part Number -

Manufacturer -

Manufacturer Part Number -

Cost -

[ digikey]

[ datasheet]

Solenoid

See the Solenoid Development page for more information. For logistics reasons, we may purchase a solenoid as we did last year and take it apart for use in our mounting apparatus.

• Candidate winding: 22AWG from http://www.solenoidcity.com/solenoid/tubular/s-20-125hp1.htm
• BETTER candidate winding: 19AWG from http://solenoidcity.com/solenoid/tubular/S-29-150hfp1.htm