BQ24188_15 Datasheet, PDF (34/52 Pages) Texas Instruments – bq24188 2A, 30V, Host-Controlled Single-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path Management and USB-OTG Support

bq24188
SLUSC44A – DECEMBER 2014 – REVISED MAY 2015
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9.6.6 V_IN-DPM Voltage/ MINSYS Status Register
Memory location: 05, Reset state: xx00 x000
Figure 24. V_IN-DPM Voltage/ MINSYS Status Register
B7(MSB)
B6
B5
B4
B3
X
X
0
0
X
R
R
R/W
R/W
R
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
B2
B1
B0(LSB)
0
0
0
R/W
R/W
R/W
BIT
FIELD
TYPE
DESCRIPTION
B7(MSB) MINSYS_STATUS
R
0 – Minimum System Voltage mode is not active
1 – Minimum System Voltage mode is active (low battery
B6
VINDPM_STATUS
R
0 – VIN-DPM mode is not active
1 – VIN-DPM mode is active
B5
LOW_CHG
R/W
0 – Normal charge current set by 04h
1 – Low charge current setting 300mA (default 0)
B4
NA
R
NA
B3
CD_STATUS
R
0 – CD low, IC enabled
1 – CD high, IC disabled
B2
V_INDPM2
R/W
Input V_IN-DPM voltage: V_DPMOFF + 8% (default 0)
B1
V_INDPM1
R/W
Input V_IN-DPM voltage: V_DPMOFF + 4% (default 0)
B0(LSB)
V_INDPM0
R/W
Input V_IN-DPM voltage: V_DPMOFF + 2% (default 0)
• V_IN-DPM voltage offset is programmable using the VINDPM_OFF bit (bit 0 of register 0x06) and default V_IN-DPM
threshold is 4.2V.
LOW_CHG Bit (Low Charge Mode Enable)
The LOW_CHG bit is used to reduce the charge current to a minimum current. This feature is used by
systems where battery NTC is monitored by the host and requires a reduced charge current setting or by
systems that need a “preconditioning” current for low battery voltages. Write a “1” to this bit to charge at
300mA. Write a “0” to this bit to charge at the programmed charge current.
V_INDPM Bits (V_INDPM Threshold setting)
Use V_INDPM bits to set the V_INDPM regulation threshold. The V_INDPM threshold is calculated using the
following equation:
indentV_INDPM = V_{INDPM_OFF} + V_INDPMCODE × 2% × V_{INDPM_OFF}
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