BQ24257 Datasheet, PDF (31/45 Pages) Texas Instruments – 2A Single Input I2C, Standalone Switch-Mode Li-Ion Battery Charger with Integrated Current Sense Resistor

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Register #5
Memory location: 04, Reset state: xx00 x010
bq24257
bq24258
SLUSBG0B – FEBRUARY 2013 – REVISED JULY 2013
BIT
B7(MSB)
B6
NAME
LOOP_STATUS1 ⁽¹⁾
LOOP_STATUS0 ⁽¹⁾
Read/Write
Read Only
Read Only
FUNCTION
00 – No loop is active that slows down timer
01 – V_{IN_DPM} regulation loop is active
10 – Input current limit loop is active
11 – Thermal regulation loop is active
B5
LOW_CHG
Read/Write 0 – Normal charge current set by 03h
1 – Low charge current setting 330mA (default 0)
B4
DPDM_EN
Read/Write 0 – Bit returns to 0 after D+/D– detection is performed
1 – Force D+/D– detection (default 0)
B3
B2
B1
B0(LSB)
CE_STATUS
VINDPM_2 ⁽²⁾
VINDPM_1 ⁽²⁾
VINDPM_0 ⁽²⁾
Read Only
Read/Write
Read/Write
Read/Write
0 – CE low
1 – CE high
Input V_IN-DPM voltage: 320mV (default 0)
Input V_IN-DPM voltage: 160mV (default 1)
Input V_IN-DPM voltage: 80mV (default 0)
(1) LOOP_STATUS bits show if there are any loop is active that slow down the safety timer. If a status occurs, these bits announce the
status and do not clear until read. If more than one occurs, the first one is shown
(2) VIN-DPM voltage offset is 4.20V and default V_{IN_DPM} threshold is 4.36V.
• LOOP_STATUS – Provides the status of the active regulation loop. The charge controller allows for only one
loop can regulate at a time.
• LOW_CHG – When set to a ‘1’, the charge current is reduced 330mA independent of the charge current
setting in register 0x03. When set to ‘0’, the charge current is set by register 0x03.
• DPDM_EN – Forces a D+/D– detection routine to be executed once a ‘1’ is written. This is independent of the
input being supplied.
• CE_STATUS – Provides the status of the CE pin level. If the CE pin is forced high, this bit returns a ‘1’. If the
CE pin is forced low, this bit returns a ‘0’.
Copyright © 2013, Texas Instruments Incorporated
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