BQ24188_15 Datasheet, PDF (29/52 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

www.ti.com
bq24188
SLUSC44A – DECEMBER 2014 – REVISED MAY 2015
9.6 Register Descriptions
9.6.1 Status/Control Register (READ/WRITE)
Memory location: 00, Reset state: 00xx 0xxx
Figure 19. Status/Control Register
B7(MSB)
B6
B5
B4
B3
B2
0
0
X
X
0
X
R/W
R/W
R
R
R/W
R
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
B1
B0(LSB)
X
X
R
R
BIT
B7(MSB)
B6
B5
B4
FEILD ^{(1) (2)}
TMR_RST
EN_BOOST
STAT_1
STAT_0
B3
EN_SHIPMODE
B2
B1
B0(LSB)
FAULT_2
FAULT_1
FAULT_0
TYPE
R/W
R/W
R
R
R/W
R
R
R
DESCRIPTION
Write: TMR_RST function, write “1” to reset the watchdog timer (auto clear)
Read: Always 0
0-Charger Mode
1-Boost Mode (default 0)
00-Ready
01-Charge in progress
10-Charge done
11-Fault
0-Normal Operation
1-Ship Mode Enabled (default 0)
000-Normal
001-VIN > VOVP or Boost Mode OVP
010- Low Supply connected (VIN<VUVLO or VIN<VSLP) or Boost Mode Overcurrent
011- Thermal Shutdown
100-Battery Temperature Fault
101- Timer Fault (watchdog or safety timer)
110-Battery OVP
111-No Battery connected
(1) STAT_x bits show current status. These bits change based on the current condition. When a status change occurs, a single 128us pulse
on the STAT and INT outputs occur and the STATx and FAULT_x bits of the status registers are updated in the I²C. Once the fault is
removed, the STATx bits are updated to show the current status.
(2) FAULT_x bits show faults. If a fault occurs, these bits announce the fault and do not clear until read. If more than one fault occurs only
the highest priority fault is shown, ranked from 1 to 8 in the order shown in the table. When a fault occurs, a single 128μs pulse on the
STAT and INT outputs occur and the STATx and FAULT_x bits of the status registers are updated in the I²C. The FAULT_x bits are not
cleared until they are read in the I²C and the fault condition no longer exists.
EN_BOOST Bit (Operation Mode)
The EN_BOOST bit selects the operation mode for the bq24188 . Write a “1” to enable boost mode and
regulate IN to 5V to supply OTG peripherals. See the Boost Mode Operation section for more details.
EN_SHIPMODE Bit
Writing the EN_SHIPMODE bit to a “1” latches off the IC, battery FET and BGATE until a high to low
transition on UVLO occurs. This means that if EN_SHIPMODE is written to a “1” while the input is
connected, it must first be removed and then replaced before the battery FET turns on. This allows the
end product with no load on the battery and the end user will enable the device by plugging it into the
adapter. The EN_SHIPMODE bit can be cleared using the I²C interface as well.
Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: bq24188
Submit Documentation Feedback
29