101-1006 Rabbit Semiconductor, 101-1006 Datasheet - Page 207

• 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

You can calculate the current that is available to your circuits that are external to the Power-
Core module.
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 =
Thus, as an example, if the user's 5 V circuitry consumes 2.5 W and the user's 3.45 V cir-
cuitry consumes 0.5 W, then the total power needed from the power supply is (2.5 W ×
1.33 + 0.5 W × 1.92 + (PowerCore consumption as optionally configured)) = 5.3 W to 7.0 W.
If that external power supply is a 12 V supply, then it will need to source I = Power/Volt-
age current. Bear in mind that voltage presented to the regulators has a 0.7 V diode drop.
Thus the voltage in this formula must be reduced by 0.7 V, so current = Power/11.3 V
amps current. 5.3 W/11.3 V = 469 mA; 7.0 W/11.3 V = 619 mA.
This power-supply option does not have the AC zero-crossover detection circuit used for
triac support.
External AC Power Supplies
Three external AC power-supply options are available.
• Option 3—AC via locking connector at J3, full-wave bridge rectifier, onboard +5 V
• Option 4—AC via locking connector at J3, full-wave center-tapped rectifier, onboard
• Option 5—AC via locking connector at J3, half-wave rectifier, onboard +5 V switching
The operation and features of each these options are discussed below.
User’s Manual
(5Vpower_to_user's_circuit) × 1.33.
(3.45Vpower_to_user's_circuit) × 1.92.
switching regulator @ 1 A or 2 A, no zero-crossover detection or triac support, trans-
former with untapped secondary winding may be used
+5 V switching regulator @ 1 A or 2 A, includes zero-crossover detection for triac sup-
port, transformer with tapped secondary winding required
regulator @ 1 A or 2 A, includes zero-crossover detection for triac support, transformer
with untapped secondary winding may be used
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