Datasheet

bq24190, bq24192
bq24192I, bq24193
SLUSAW5A –JANUARY 2012–REVISED OCTOBER 2012 www.ti.com
Fault Register REG09
BIT DESCRIPTION
Bit 7 WATCHDOG_FAULT 0 – Normal, 1- Watchdog timer expiration
Bit 6 BOOST_FAULT 0 – Normal, 1 – VBUS overloaded (OCP), or VBUS OVP in boost mode
Bit 5 CHRG_FAULT[1] 00 – Normal, 01 – Input fault (VBUS OVP or VBAT<VBUS<3.8V), 10 - Thermal shutdown,
11 – Charge Safety Timer Expiration
Bit 4 CHRG_FAULT[0]
Bit 3 BAT_FAULT 0 – Normal, 1 – BATOVP
Bit 2 NTC_FAULT[2] bq24190, bq24192, bq24192I: 000 – Normal, 001 – TS1 Cold, 010 – TS1 Hot, 011 – TS2 Cold,
100 – TS2 Hot, 101 – Both Cold, 110 – Both Hot
Bit 1 NTC_FAULT[1]
bq24193: 000 – Normal, 010 – Warm, 011 – Cool, 101 – Cold, 110 – Hot
Bit 0 NTC_FAULT[0]
Vender / Part / Revision Status Register REG0A
BIT DESCRIPTION
Bit 7 Reserved 0 - Reserved
Bit 6 Reserved 0 - Reserved
Device Configuration
Bit 5 PN[2] bq24190 – 100, bq24192, bq24193 – 101, bq24192I – 011
Bit 4 PN[1]
Bit 3 PN[0]
Bit 2 TS_PROFILE 0 – Cold/Hot window (bq24190, bq24192, bq24192I), 1 – JEITA profile (bq24193)
Bit 1 DEV_REG[0] 11
Bit 0 DEV_REG[1]
DETAILED DESCRIPTION
The bq24190, bq24192, bq24192I, bq24193 is an I
2
C controlled power path management device and a single
cell Li-Ion battery charger. It integrates the input reverse-blocking FET (RBFET, Q1), high-side switching FET
(HSFET, Q2), low-side switching FET (LSFET, Q3), and BATFET (Q4) between system and battery. The device
also integrates the bootstrap diode for the high-side gate drive.
Device Power Up
Power-On-Reset (POR)
The internal bias circuits are powered from the higher voltage of VBUS and BAT. When VBUS or VBAT rises
above UVLOZ, the sleep comparator, battery depletion comparator and BATFET driver are active. I
2
C interface
is ready for communication and all the registers are reset to default value. The host can access all the registers
after POR.
Power Up from Battery without DC Source
If only battery is present and the voltage is above depletion threshold (V
BAT_DEPL
), the BATFET turns on and
connects battery to system. The REGN LDO stays off to minimize the quiescent current. The low R
DSON
in
BATFET and the low quiescent current on BAT minimize the conduction loss and maximize the battery run time.
The device always monitors the discharge current through BATFET. When the system is overloaded or shorted,
the device will immediately turn off BATFET and keep BATFET off until the input source plugs in again.
BATFET Turn Off
The BATFET can be forced off by the host through I
2
C REG07[5]. This bit allows the user to independently turn
off the BATFET when the battery condition becomes abnormal during charging. When BATFET is off, there is no
path to charge or discharge the battery.
When battery is not attached, the BATFET should be turned off by setting REG07[5] to 1 to disable charging and
supplement mode.
20 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated
Product Folder Links: bq24190 bq24192 bq24192I bq24193