ST ST7260E2, User Manual

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Getting started UM0497
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1 Getting started
1.1 Package contents
The USB Li-Ion battery charger evaluation board includes the following items:
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Hardware content:
– One evaluation board
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Documentation:
– User manual
1.2 Hardware description
Figure 1 below shows the snapshot of the evaluation board.
Figure 1. USB Li-Ion evaluation board (STEVAL-ISB003V1)
1.2.1 Power supply
The evaluation board is powered by a USB bus directly. As only 100 mA current is available
by default from the USB bus, the charger is inititally kept in shutdown mode. After proper
enumeration is done by the USB controller to increase the supply current limit to 500 mA,
the charger switches to ON to start charging the battery.
1.2.2 Current limiter (ST890B)
To provide additional information about the USB supply current, a current limiter (ST890B) is
kept in series of the USB supply. There is a STATUS LED (D3) connected with the FAULT
pin of this current limiter.