True blue power TA102, Руководство по установке и эксплуатации

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14 Manual Number 9017942 • Revision K, May 14, 2020
SECTION 4 OPERATION
4.1 ELECTRICAL PERFORMANCE
The TA102 Series Dual USB Charging Port converts an aircraft (DC) input voltage within the range
specified to a 5V (DC) output. This output power is applied to a dual USB-A connector in
accordance with the
USB Implementers Forum.
The USB D+ and D- data lines communicate with the USB portable device to tell the device it is a
dedicated charging port (DCP), capable of a higher current than a standard USB port. This allows
the USB portable device to draw up to 2.1 Amps.
The unit is designed as a DC-to-DC converter with a series switch on each output to regulate
current applied to that output. Each series switch independently reduces the output current to a
safe level if the USB portable device draws excess current, is shorted or has a fault.
If the temperature of the TA102 becomes elevated due to a fault or excessive load, the device will
seamlessly communicate with the USB portable device to lower the charge current. This allows the
device to continue charging while the unit returns to a temperature within designed limits. When
the temperature returns to a safe level the TA102 will automatically reestablish the higher charge
current level with the device and continue charging.
4.2 PROTECTIVE FEATURES
Short Circuit Protection
The TA102 is capable of surviving a short circuit event without permanent damage. The
unit goes into an over-current condition so that the average current is significantly reduced
and the device is protected.
Over-Current Protection
The TA102 monitors the current draw individually on each port. During an over-current
condition the voltage is reduced. If the voltage falls below 3.8 VDC the output is turned off
for a period of 12 seconds. The output is then checked for continued over-current
conditions every 16 milliseconds. This condition is referred to as a hiccup mode. The
device stays in this mode until the over-current condition is removed, then returns to normal
operation.
Low Input Voltage Shutdown
If the input voltage applied to the TA102 drops below 10 VDC the unit will shut down until
the applied voltage returns to a level within range.
Over-Temperature
When the temperature of the TA102 becomes elevated, the unit communicates with the
USB portable device to reduce the charge current output (1 amp limit). When the
temperature returns to an acceptable level the unit automatically returns to a higher charge
current as required (up to 2.1 amps).