23 June 2005
HE104MAN-V8 Manual
2.2 Power Considerations
Usable +5V output =10A – (I [-5] + I [-12] ∙ 2.4 + I [12] ∙ 2.4) 0.8
The +5V switching regulator is rated at 10A maximum output however, the +5V output, supplies power to the +12VDC,
Where:
I[12] = 12VDC current load
Assuming 90 percent convertor efficiency (actual efficiency may vary).
2.3HE104 Connectors
2.3.1Main Input Power Connector
Input power is connected to the “pluggable” block, CN1, which is removable from the socket connector on the circuit board. The power supply accepts DC input voltages in the range of 6VDC to 40VDC.
Unregulated vehicle power is connected as follows:
!! CAUTION !!
To allow operation at the lowest possible input voltages (6VDC) and for the best efficiency, there is no input Reverse Polarity Diode (RPD) provided on the HE104 without a battery charger option. If input RPD is required, add RPD to the HE104 part number:
-Example HE
Note: Adding the RPD results in an increased power loss. For heat dissipation estimation please refer to section 2.11.
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