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Power Input
Power to the Hydra-X10 Body module can be applied to the J7 barrel connector or to the J5 female header
connector's VIN and GND terminals. Power to the module should not exceed 52V.
The barrel connector power input is protected against voltage reversal. However, the VIN input at the J5
connector is not. Heads interfacing to the HYDRA-X10 should observe correct voltage polarity.
Barrel Connector J7 correct polarity is with the center pin connected to VIN and the shell connected to GND.
Figure 3 Barrel Connector J7 Polarity
The HYDRA-X10 is optimized to operate with voltages ranging from 16V to 52V. When the VIN input voltage
goes above 16V, the system exits UVLO protection and all subsystems, including voltage regulators, analog
front end and microcontroller, are enabled. When an operational voltage is applied, LED D2 will light up. This
is the LED which notifies VSYS (5V) rail is up and running. 3.3V and 1.8V regulators will also be operating at
this point in time. Module is ready for use.
Operating the HYDRA-X10 Body With 12V VIN
Although the PAC5210 device is optimized to operate at higher than 12V voltages, it is still possible to
operate the module with voltages in between 12V and 16V. Care must be taken, however, not to exceed the
16V mark.
In order to operate the module at these lower voltages, the user must apply a short between the VHM and VP
terminals. This tells the system not to use the Buck regulator. The 12V applied by the user at the VIN
terminal, is then used to generate 5V, 3.3V and 1.8V.
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Rev 1.0 June 2014
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