BQ24273 Datasheet, PDF (18/27 Pages) Texas Instruments – 2.5A, Single Input, Single Cell Switchmode Li-Ion Battery Charger with Integrated Current Sense

bq24273
SLUSB08 – JUNE 2012
Control Register (READ/WRITE)
Memory location: 02, Reset state: 1000 1100
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BIT
B7(MSB)
B6
B5
B4
B3
B2
B1
B0 (LSB)
NAME
RESET
Read/Write
Write Only
NA
NA
NA
EN_STAT
Read/Write
Read/Write
Read/Write
Read/Write
TE
Read/Write
CE
Read/Write
HZ_MODE Read/Write
FUNCTION
Write: 1-Reset all registers to default values
0-No effect
Read: always get “1”
NA
NA
NA
1-Enable STAT output to show charge status,
0-Disable STAT output for charge status. Fault interrupts are still show even when EN_STAT
= 0. (default 1)
1-Enable charge current termination,
0-Disable charge current termination (default 1)
1-Charger is disabled
0-Charger enabled (default 0)
1-High impedance mode
0-Not high impedance mode (default 0)
RESET Bit
The RESET bit in the control register (0x02h) is used to reset all the charge parameters. Write “1” to RESET bit
to reset all the registers to default values and place the bq24273 into DEFAULT mode and turn off the watchdog
timer. The RESET bit is automatically cleared to zero once the bq24273 enters DEFAULT mode.
CE Bit (Charge Enable)
The CE bit in the control register (0x02h) is used to disable or enable the charge process. A low logic level (0) on
this bit enables the charge and a high logic level (1) disables the charge. When charge is disabled, the battery is
disconnected from the CS+.
HZ_MODE Bit (High Impedance Mode Enable)
The HZ_MODE bit in the control register (0x02h) is used to disable or enable the high impedance mode. A low
logic level (0) on this bit enables the IC and a high logic level (1) puts the IC in a low quiescent current state
called high impedance mode.
Control/Battery Voltage Register (READ/WRITE)
Memory location: 03, Reset state: 0001 0100
BIT
B7(MSB)
B6
B5
B4
B3
B2
B1
B0(LSB)
NAME
V_BREG5
V_BREG4
V_BREG3
V_BREG2
V_BREG1
V_BREG0
I_{INLIMIT_IN}
NA
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
FUNCTION
Battery Regulation Voltage: 640mV (default 0)
Battery Regulation Voltage: 320mV (default 0)
Battery Regulation Voltage: 160mV (default 0)
Battery Regulation Voltage: 80mV (default 1)
Battery Regulation Voltage: 40mV (default 0)
Battery Regulation Voltage: 20mV (default 1)
Input Limit for IN input
0 – 1.5A
1 – 2.5A (default 0)
NA
• Charge voltage range is 3.5V–4.44V with the offset of 3.5V and step of 20mV (default 3.6V).
18
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