Phytec phyCORE-PXA255, Hardware Manual

Page: 25 / 106

Power Supply

PHYTEC Meßtechnik GmbH 2004 L-657e_0
17
Battery Charger Circuitry for 6 NiMH Batteries
The Development Board can be populated with an optional battery
charger circuit for six (when using a 12 V input voltage) (up to 12
possible, requires different hardware configuration and 24 V input
voltage) NiMH batteries. In this case the BQ24703 battery charge
controller switches the voltage from the power adapter to battery
operation. It will charge the batteries when the Development Board is
supplied with voltage by a wall adapter.
E N A B L E
I B A T
A C S E L
A C P R E S
A L A R M
T E M P
B Q 2 4 7 0 3
8 - 2 4 V
I N P U T
8 - 2 4 V
o r V a k k u
O U T P U T
Figure 10: Battery Charger Circuitry
Note:
The battery charger register is only available with PCB revision
1220.2 and higher.