SolenoidDRV
  This circuit was developed to drive a solenoid in a Hit and Hold
Fashion where full applied voltage is delivered to the coil for a 
predeterminbed time and them reduced to a hold level.  TI's DRV101
and DRV102 solenoid driver chips are designed to such a task.  This
implemenation uses the Duty cycle adjust to allow for supply voltage 
changes to be compenstated for thus providing a near constant hold
current.  The board has been layed out to support three configuration:

1) Solenoid driven by high side using the DRV102,
2) Solenoid driven by low side using the DRV101,
3) Solenoid driven low side with a MOSFET to decrease voltage drop
      and a DRV102.                             

For setting resisitors R1 and R2 refer to included spreadsheet.   
Schematic has details as to stuffing for which configuration.