Garmin Battery Charger MC34676B User Manual

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Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0
Freescale Semiconductor 11
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 V
BATDET
is less than 1.75V to enable the MC34676B, then the evaluation board starts charging the battery.
Figure 8. The AC Charger Set Up for the Evaluation Board
Figure 9. The USB Charger Set Up for the Evaluation Board
A AV
DC
Power
Source
Li+
Battery
A AV
USB
Power
Port
Li+
Battery

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