Specifications

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