Sierra Wireless AirLink FXT Series Dokumentacja Pobierz pdf (Strona 14)

WA_DEV_FEX20_PTS_003 Rev 002 May 26, 2010 14

4. Battery Accessory Charging

The battery accessory charges the battery cell in slow charging mode by either DC-IN or USB power

source. The charging current is controlled by the battery accessory to avoid DC-IN or USB current

surges and protects the internal battery cell against over voltage. The output voltage of the battery

accessory ranges from 3Vmin to 4.3Vmax at room temperature.

Note: If both DC-IN and the USB power source are connected, charging through DC-IN takes precedence if

the input USB voltage is 5V or below. Otherwise, charging via USB takes precedence.

4.1. DC-IN Charging

Pin 5 of the Micro-fit connector is connected to DC-IN, which can be used to charge the battery

accessory. DC-IN is the external power source of the Fastrack Xtend accessible through the battery

cable.

To use DC-IN charging, the power cable with DC-IN (7.5V to 32V) is plugged to the battery cable and

attached to the battery accessory as shown in the figure below.

Figure 6. DC-IN Charging

Battery Cable

Fastrack Xtend

Battery Accessory

Power Cable

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Sierra Wireless AirLink FXT Series Dokumentacja Strona 14