Datasheet

bq24190, bq24192
bq24192I, bq24193
SLUSAW5A –JANUARY 2012–REVISED OCTOBER 2012 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION
The bq24190, bq24192, bq24192I, and bq24193 are highly-integrated switch-mode battery charge management
and system power path management devices for single cell Li-Ion and Li-polymer battery in a wide range of
tablet and other portable devices. Its low impedance power path optimizes switch-mode operation efficiency,
reduces battery charging time and extends battery life during discharging phase. The I
2
C serial interface with
charging and system settings makes the device a truly flexible solution.
The device supports a wide range of input sources, including standard USB host port, USB charging port and
high power DC adapter. To set the default input current limit, the bq24190 detects the input source following the
USB battery charging spec 1.2, and the bq24192, bq24192I, and bq24193 takes the results from detection circuit
in the system, such as USB PHY device. The bq24190,192,192I, and 193 are compliant with USB 2.0 and USB
3.0 power specifications with input current and voltage regulation. Meanwhile, the bq24190, bq24192, bq24192I,
and bq24193 meets USB On-the-Go operation power rating specification by supplying 5V on the VBUS with a
current limit up to 1.3A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5V
minimum system voltage (programmable). With this feature, the system maintains operation even when the
battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power
path management automatically reduces the charge current to zero. As the system load continues to increase,
the power path discharges the battery until the system power requirement is met. This supplement mode
operation prevents overloading the input source.
The devices initiate and complete a charging cycle without software control. It automatically detects the battery
voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the
end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in
the constant voltage phase. When the full battery falls below the recharge threshold, the charger will
automatically start another charging cycle.
The bq24190, bq24192, bq24192I, and bq24193 provide various safety features for battery charging and system
operation, including dual pack negative thermistor monitoring, charging safety timer and over-voltage/over-
current protections. The bq24193 supports JEITA guideline compliant temperature profile. The thermal regulation
reduces charge current when the junction temperature exceeds 120°C (programmable).
The STAT output reports the charging status and any fault conditions. The PG output in the bq24192, bq24192I,
and bq24193 indicates if a good power source is present. The INT immediately notifies the host when a fault
occurs.
The bq24190, bq24192, bq24192I, and bq24193 are available in a 24-pin, 4x4 mm
2
thin QFN package.
bq2419x Family Table
bq24190 bq24192 bq24192I bq24193
I
2
C Address 6BH 6BH 6BH 6BH
USB Detection D+/D– PSEL PSEL PSEL
Default VINDPM 4.36V 4.36V 4.44V 4.36V
Default Battery Voltage 4.208V 4.208V 4.112V 4.208V
Default Charge Current 2.048A 2.048A 1.024A 2.048A
Default Adapter Current 1.5A 3A 1.5A 3A
Limit
Maximum Pre-charge 2.048A 2.048A 640mA 2.048A
Current
Charging Temperature Cold/Hot Cold/Hot Cold/Hot JEITA
Profile 2 TS pins 2 TS pins 2 TS pins 1 TS pin
Status Output STAT STAT, PG STAT, PG STAT, PG
STAT During Fault Blinking @ 1Hz Blinking @ 1Hz 10k to ground Blinking @ 1Hz
2 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated
Product Folder Links: bq24190 bq24192 bq24192I bq24193