BQ24250C_15 Datasheet, PDF (29/46 Pages) Texas Instruments – bq24250C 2A Single Input I2C, Standalone Switch-Mode Li-Ion Battery Charger with Power-Path Management

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bq24250C
SLUSBY7 – JULY 2014
Register #2
Memory location: 01, Reset state: xxxx 1100
BIT
NAME
READ/WRITE
FUNCTION
B7(MSB)
Reset
Write only
Write:
1 – Reset all registers to default values
0 – No effect
B6
I_{IN_ILIMIT_2}
Read/Write
000 – USB2.0 host with 100mA current limit
B5
I_{IN_ILIMIT_1}
Read/Write
001 – USB3.0 host with 150mA current limit
010 – USB2.0 host with 500mA current limit
011 – USB3.0 host with 900mA current limit
100 – Charger with 1500mA current limit
B4
I_{IN_ILIMIT _0}
Read/Write
101 – Charger with 2000mA current limit
110 – External ILIM current limit
111- No input current limit with internal clamp at 3A (PTM MODE)
B3
EN_STAT
Read/Write
0 – Disable STAT function
1 – Enable STAT function
B2
EN_TERM
Read/Write
0 – Disable charge termination
1 – Enable charge termination
B1
CE
Read/Write
0 – Charging is enabled
1 – Charging is disabled
B0 (LSB) HZ_MODE
Read/Write
0 – Not high impedance mode
1 – High impedance mode
I_{IN_LIMIT}
Sets the input current limit level. When in host mode this register sets the regulation
level. However, when in standalone mode (e.g. no I²C writes have occurred after power
up or the WD timer has expired) the external resistor setting for I_ILIM sets the regulation
level.
EN_STAT
Enables and disables the STAT pin. When set to a ‘1’ the STAT pin is enabled and
function normally. When set to a ‘0’ the STAT pin is disabled and the open drain FET is
in HiZ mode.
EN_TERM
Enables and disables the termination function in the charge controller. When set to a ‘1’
the termination function will be enabled. When set to a ‘0’ the termination function will be
disabled. When termination is disabled, there are no indications of the charger
terminating (i.e. STAT pin or STAT registers).
CE
The charge enable bit which enables or disables the charge function. When set to a ‘0’,
the charger operates normally. With a valid input, when set the bit to a ‘1’, the charger is
disabled by turning off the BAT FET between SYS and BAT. The SYS pin continues to
stay active via the switch mode controller. Without a valid input, When set the bit to a '1',
the BAT FET will not be turned off.
HZ_MODE
Sets the charger IC into low power standby mode. When set to a ‘1’, the switch mode
controller is disabled but the BAT FET remains ON to keep the system powered. When
set to a ‘0’, the charger operates normally.
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