Table of Contents
Advertisement
4/ Power Specification
The COMe-cDV7 receives power from a carrier board via the COMe Interface connector. The COMe-cDV7 must be
connected to the carrier board to power on.
The module is powered on by connecting to the carrier board using the Interface connector.
Before connecting the module's interface connector to the carrier board's corresponding
connector, ensure that the carrier board is switch off and disconnected from the main power
supply. Failure to disconnect the main power supply could result in personal injury and
damage to the module and/or carrier board.
Observe that only trained personnel aware of the associated dangers connect the module,
within an access controlled ESD-safe workplace.
4.1. Power Supply Specifications
The COMe-cDV7 uses either an ATX PSU (12 V) or single power wide range PSU (8.5 V to 20 V). Other supported voltages
are 5 V standby and 3.3 V RTC battery input. The COMe-cDV7 supports operation in both single power supply mode and
ATX power supply mode.
The following table lists the power supply specifications.
Supply Voltage (VCC)
Standby Voltage
Supply Voltage Range (VCC)
If any of the supply voltages drops below the allowed operating level longer than the
specified hold-up time, all the supply voltages should be shut down and left OFF for a time
long enough to allow the internal board voltages to discharge sufficiently.
If the OFF time is not observed, parts of the board or attached peripherals may work
incorrectly or even suffer a reduction of MTBF. The minimum OFF time depends on the
implemented PSU model and other electrical factors and must be measured individually for
each case.
5V Standby voltage is not mandatory for operation.
4.1.1. Power Supply Voltage Rise Time
The input voltage rise time is 0.1 ms to 20 ms from input voltage ≤10% to nominal VCC. To comply with the ATX
specification there must be a smooth and continuous ramp of each DC input voltage from 10% to 90% of the DC input
voltage final set point.
4.1.2. Power Supply Voltage Ripple
The maximum power supply voltage ripple is 200 mV peak-to-peak at 0 MHz – 20 MHz. the ripple voltage must not
cause the input voltage range to be exceeded.
www.kontron.com
12 V
5 V ±5%
8.5 V to 20 V ( wide range voltage input across the whole temperature range)
COMe-cDV7 - User Guide, Rev 1.0
// 28
Advertisement
Table of Contents
