Test Setup with the Evaluation Board
8 Test Setup with the Evaluation Board
The test setup is shown in Figure 8 and Figure 9. Connect a DC power source with a larger than 2.0A current limit to the AC pad or a USB power port to the USB pad on the evaluation board. Connect the positive and negative polarities of the Li+ battery to the VBAT pad and the GND pad on the evaluation board respectively. Use a current meter and a voltage meter to measure the charge current and the voltage respectively. Turn on the power supply and let the VBATDET is less than 1.75V to enable the MC34676B, then the evaluation board starts charging the battery.
A 
V 
A 
DC
Power
Source
Li+
Battery
Figure 8. The AC Charger Set Up for the Evaluation Board
A 
V 
A 
USB
Power
Port
Li+
Battery
Figure 9. The USB Charger Set Up for the Evaluation Board
Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 |
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Freescale Semiconductor | 11 |
