Dialog Semiconductor DA9070 Посібник користувача - Сторінка 12
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DA9070 / DA9231 Fuel Gauge Development Kit
NDA Confidential
GUI Features
All DA9070 and DA9231 registers are accessible via the DA9070 Fuel Gauge EVK GUI.
The GUI also includes a fuel gauge function and on-board load control. These are shown in Figure 6.
Figure 6: Fuel Gauge and Load Profile Window
Note that the load values in the pull-down menu are based on the default resistor values in Table 3.
The minimum value of 3mA is the MCU's typical standby current.
The fuel gauge displays the real time battery voltage, discharge current, and State-of-Charge based
on the battery profile stored in the MCU. Be sure to update this profile if a different battery is used.
The fuel gauge will display the correct state of charge regardless of whether the on-board or external
loads are used. Charge current is not displayed and can be assumed to be the set charge current;
either set by the MCU at the pre-loaded value or by I2C command through the GUI.
The DA9070 fuel gauge outputs (IMON and VBAT_DIV) are directly controlled by the MCU. These
registers should not be controlled by the user.
Charging and Discharging
Battery charging is enabled by default. To stop battery charging, simply remove the jumper at J14.
This will remove VDD_PWR from the DA9070 and is the only method recognized by the MCU and
fuel gauge. Charging can also be enabled and disabled using I2C command or with the MODE pin.
When the battery is fully charged, the DA9070 will stop charging and restart only when the battery
voltage has dropped to the re-charge threshold.
Applying external loads to LDO and Boost outputs
For the three LDO rails as well as the Boost rail in DA9070, the DA9070 Fuel gauge EVK has the
flexibility to use either on-board load resistors or connect to external loads.
If on-board load resistors are used, jumpers need to be installed on LDO0/1/2_LD and VO_BST
connectors, as shown in
Figure
3. The default load resistor values are shown in
Table
3. The load
current for each rail will be determined by the programmed output voltage divided by the fixed load
resistor values. The total load can be controlled from the GUI Fuel Gauge window.
User Manual
Revision 2.1
28-Oct-2018
12 of 18
© 2018 Dialog Semiconductor