SC8913 EVM USER GUIDE
SOUTHCHIP SEMICONDUCTOR
SOUTHCHIP CONFIDENTIAL
Copyright © 2018, Southchip Semiconductor Technology (Shanghai) Co., Ltd
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discharging mode, IBUS limit current, IBAT limit current and so on. The User can also control power path and
read various protective states and intelligent detection states through I2C interface. In addition, chip’s
integrated ADC function also needs to be turned on through the I2C, and the data of the ADC conversion are
also stored in the registers.
The device address is 0x74 (7bits). The following is a brief introduction of setting voltage/current and read
voltage/current through I2C interface, and the specific register table can be referred to
SC8913
datasheet.
1.1.1
SouthChip I2C GUI Tool Guidance
I2C GUI Tool is developed by
SouthChip
, convenient for customers to debug.
When VBUS is decided by external configuration, the Rup and Rdown values marked with red color on the
lower part of the interface should be filled according to the actual resistance on EVM. In this way, the voltage
value shown in blue marker 1 is the true VBUS voltage value.
In the same way, if user fills the current sense resistance values of IBUS (RS1) and IBAT (RS2) on the EVM in the
RS1 and RS2 marked with red color, then the I2C GUI will show the actual IBUS_LIM and IBAT_LIM set values, as
well as real
-
time value of IBUS and IBAT.
Figure 1 SC8913 I2C tool interface
1.1.2
Charging Target Voltage in Charging Mode
Firstly, set Reg 0x09<7> (
OTG_EN
) =0 to work in charging mode.
a)
Charge target voltage VBAT is decided by internal setting
VBATS pin should be connected with VBAT network and set Reg 0x00<5> (
VBAT_SEL
) =0.
CSEL
: Reg 0x00<4:3>, used to set battery cell numbers
VCELL_SET
: Reg00<2:0>, used to set target cell voltage value
The default charge target voltage value for each cell is 4.2V. User can configure it from 4.1V to 4.5V
