LAVA Computer MFG Inc. eSynC Product Family - Reference Manual – C03
2 Vulcan St. Toronto, ON
Tel: +1 416 674-5942
www.lavalink.com
Canada, M9W 1L2
Toll Free (US & Canada): 800 241-5282
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Barrel Jack “9-36 VDC In”
The eSynC "vc" products require power to be supplied through a DC barrel jack with a 2-
millimeter positive center pin. This receptacle is labeled “9-36 VDC In.” The power cable and
power supply are supplied by the user.
Many use cases require up to a 24-watt power supply (12 volts at 2 amperes or 24 volts at 1
ampere). The permitted input range is 9 to 36 volts. Any unregulated power supply can be used.
This range of supported voltages permits the power supply to be placed up to 50 feet away from
the LAVA product when a suitable wire gauge is used.
The minimum power specification for a use case requires developing a power budget based on
the USB peripherals to be used and the mobile device. When no external USB peripherals are
used, or a few low power peripherals are used, the power supply requirements can drop down to
12 watts (12 volts at 1 ampere, or 24 volts at 0.5 amperes). The internal power converter within
the LAVA product is 80% efficient at full load, therefore 12 watts into the product results in 10
watts for system use.
A power supply with a higher power rating than the required minimum is always permitted, and
has the benefit of running cooler. As an example, if your system ideally required a 12-volt, 2-
ampere power supply, then a 12-volt, 2.5-ampere supply is acceptable.
The length and gauge of wire used to connect the power supply to the LAVA product results is a
loss of voltage and therefore power reaching the LAVA product. This additional loss must also
be factored into the power budget. A higher power supply voltage is always preferred to
minimize the power loss in the wire.
When connecting the eSynC to the supply, ensure the wiring is such that the center pin is
positive. If the polarity is reversed, the damage to the eSynC is immediate. Application of the
wrong input voltage violates LAVA's Manufacturer Warranty.
The attached power supply and wiring are responsible for providing short circuit protection.
USB-A receptacles
Several eSynC products support one or more USB 2.0 ports with a standard A-type receptacle.
Each receptacle allows a USB Accessory to be accessed by the tablet or mobile phone. Each
receptacle provides power to a USB Accessory up to a maximum of 500 mA, as per the USB
specification.
