101-1006 Rabbit Semiconductor, 101-1006 Datasheet - Page 211

• Manufacturer Part Number: 101-1006
• Description: MODULE POWERCORE FLEX 3800
• Manufacturer: Rabbit Semiconductor

Specifications of 101-1006

• Module/board Type: MPU Core Module
• For Use With/related Products: RCM3800
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Option 4—Full-Wave CT
Option 4 requires unregulated AC or DC. This option uses a center-tapped-transformer
full-wave bridge and filter before the regulators. The full-wave bridge converts AC volt-
age into DC voltage. This option has a friction lock connector installed on the PowerCore
to accept external power. The full-wave rectifier of option 4 requires a center-tapped trans-
former—a center-tapped transformer has a third connection at the center of the secondary
side for a connection to ground.
The full-wave rectifier causes a 0.7 V voltage drop before voltage is applied to the regula-
tors. This means that the 0.7 V drop will need to be taken into account.
With this option, it is also possible to supply unregulated DC voltage to pin 2 of locking
connector J3. The negative side of the input voltage is applied to pin 4 of locking connec-
tor J3.
The selection of the +5 V regulator determines the voltage range for the unregulated DC
input power as follows.
• 8–43 V DC for 2 A regulator option
• 9–40 V DC for 1 A regulator option
AC voltage is applied to pins 2 and 6 of J3 with the center tap of the transformer con-
nected to pin 4 of J3. Because the peak AC voltages are 1.42 times higher than the rated
AC voltages, the AC voltage applied will have lower upper limits than that of an unregu-
lated DC input. Also, because AC voltage inputs go down to zero voltage during each
cycle, a higher minimum voltage than the DC voltage will be required. The selection of the
+5 V regulator determines the voltage range for the AC input power as follows.
• 24–60 V AC for 2 A regulator option
• 19–57 V AC for 1 A regulator option
This is the voltage range between each AC output. The AC voltage to the center tap is half
of the voltage specified above.
The current required is calculated based on the power consumed by the PowerCore as
optionally configured: I = Power/Vin. The PowerCore will consume between 1 W and 2.7 W,
depending on the PowerCore options. Additional power may be needed to provide for
other user's circuitry external to the PowerCore. That additional power needed from the
input power supply is calculated as follows.
• For the user's 5 V circuitry, additional power from supply =
• For the user's 3.45 V circuitry, additional power from supply =
Additional power is taken by the input diodes.
User’s Manual
(5Vpower_to_user's_circuit) × 1.33.
(3.45Vpower_to_user's_circuit) × 1.92.
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