UM1481 datasheet(7/55 Pages) STMICROELECTRONICS

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UM1481

Getting started

Doc ID 022389 Rev 1

7/55

Getting started

2.1

Package

The STEVAL-ISB012V1 demonstration board package includes the following:

●

Hardware content

–

Demonstration board STEVAL-ISB012V1

●

Documentation

–

User manual (this document)

–

Schematics, Gerber files, BOM list

●

Microcontroller firmware

–

Pre-programmed STM32F102C8T6 device soldered onto the demonstration

board.

●

Virtual COM port driver

●

Gas-gauge application GUI.

2.2

Setting up the board

The following steps should be taken to set up the board:

Standalone operation

–

Set the jumper between pin 1 and 2 of J3. This ensures the clearing of the RAM

registers of the STC3105 and indicates the connection of a fresh battery. For

details refer to jumper J3.

–

The board can be powered up by a power adapter (5 V power supply), by

connecting the micro-B USB cable or by the battery to be monitored.

–

Connect the Li-Ion battery pack to the board with appropriate polarity across

J14. A welcome message (STC3105 battery monitoring demo) is displayed on the

LCD during startup. Once again, place the jumper between pin 2 and 3 of J3. For

details refer to jumper J3.

–

Now use the navigation keys (SW1, SW2, SW3, and SW4) to scroll through the

menu.

Battery charging and discharging

If an external power source (USB or 5 V adaptor) is present, the internal charger can

be used to charge the battery using switch SW8.

–

Switch SW7 is used to select between the wall adapter or USB as the power

source.

–

An external charger can also be connected directly across J12. Switch SW8 is

used to select either an internal or external charger.

–

External load can also be connected to the board across J13 or J15. When

external load and power supply is not present, the board itself acts as a load to the

battery and discharges it.

–

Make sure to connect the external power supply source if battery voltage is below

cut-off voltage. It is shown by LED D2. Cut-off voltage is set to 3.2 V, below this

any external load (connected at J13/J15) is also disconnected by MOSFET Q7

(acting as a switch between battery and external load).

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