BQ24273 Datasheet, PDF (17/27 Pages) Texas Instruments – 2.5A, Single Input, Single Cell Switchmode Li-Ion Battery Charger with Integrated Current Sense

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REGISTER DESCRIPTION
Status/Control Register (READ/WRITE)
Memory location: 00, Reset state: 0xxx 0xxx
bq24273
SLUSB08 – JUNE 2012
BIT
NAME
B7(MSB) TMR_RST
B6
STAT_2
B5
STAT_1
B4
STAT_0
B3
B2
B1
B0(LSB)
NA
FAULT_2
FAULT_1
FAULT_0
Read/Write
Read/Write
Read only
Read only
Read only
Read/Write
Read only
Read only
Read only
FUNCTION
Write: TMR_RST function, write “1” to reset the watchdog timer (auto clear)
Read: Always 0
000- No Valid Source Detected
001- IN Ready
010- NA
011- Charging
100- NA
101- Charge Done
110- NA
111- Fault
0-Set always to 0
000-Normal
001- Thermal Shutdown
010- Battery Temperature Fault
011- Watchdog Timer Expired
100- Safety Timer Expired
101- Supply Fault
110- NA
111- Battery Fault
Battery/ Supply Status Register (READ/WRITE)
Memory location: 01, Reset state: xxxx 0xxx
BIT
B7(MSB)
B6
B5
B4
B3
B2
B1
B0 (LSB)
NAME
INSTAT1
INSTAT0
Read/Write
Read Only
Read Only
NA
NA
NA
BATSTAT1
BATSTAT0
Read Only
Read Only
Read/Write
Read Only
Read Only
EN_NOBATO Read/ Write
P
FUNCTION
00-Normal
01-Supply OVP
10-Weak Source Connected (No Charging)
11- VIN<VUVLO
NA
NA
NA
00-Battery Present and Normal
01-Battery OVP
10-Battery Not Present
11- NA
0-Normal Operation
1-Enables No Battery Operation when termination is disabled
(default 0)
EN_NOBATOP (No Battery Operation with Termination Disabled)
The EN_NOBATOP bit is used to enable operation when termination is disabled and no battery is connected.
This is useful for factory mode cases where it is desired to do a GSM calibration in the factory. For this
application, the TE bit (Bit 2 in Register 0x02h) should be set to a “0” to disable termination and the
EN_NOBATOP should be set to a “1”. This feature should not be used during normal operation as it disables the
BATOVP and the reverse boost protection circuits.
Copyright © 2012, Texas Instruments Incorporated
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