Texas Instruments BQ2419X I²C Controlled 4.5A Single Cell USB / Adaptor Charger Evaluation Module BQ24195EVM-193 BQ24195EVM-193 데이터 시트
제품 코드
BQ24195EVM-193
SLUSB97 – OCTOBER 2012
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.
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION
The bq24195L, bq24195 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 power bank, 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
management devices for single cell Li-Ion and Li-polymer battery in a wide range of power bank, 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 bq24195L, bq24195 detects the input source
following the USB battery charging spec 1.2. The bq24195/bq24195L are compliant with USB 2.0 and USB 3.0
power specifications with input current and voltage regulation. The bq24195L, bq24195 supports battery boost
operation by supplying 5.1V on PMID pin with minimum current of 1.0A (bq24195L) or 2.1A (bq24195).
high power DC adapter. To set the default input current limit, the bq24195L, bq24195 detects the input source
following the USB battery charging spec 1.2. The bq24195/bq24195L are compliant with USB 2.0 and USB 3.0
power specifications with input current and voltage regulation. The bq24195L, bq24195 supports battery boost
operation by supplying 5.1V on PMID pin with minimum current of 1.0A (bq24195L) or 2.1A (bq24195).
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.
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.
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 devices provide various safety features for battery charging and system operation, including negative
thermistor monitoring, charging safety timer and over-voltage/over-current protections. The thermal regulation
reduces charge current when the junction temperature exceeds 120°C (programmable).
thermistor monitoring, charging safety timer and over-voltage/over-current protections. 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 INT immediately notifies the host
when a fault occurs.
when a fault occurs.
The bq24195 and bq24195L are available in a 24-pin, 4x4 mm
2
thin QFN package.
ORDERING INFORMATION
PART NUMBER
PART MARKING
PACKAGE
ORDERING NUMBER
QUANTITY
bq24195RGER
3000
bq24195
bq24195
24-pin 4mmx4mm VQFN
bq24195RGET
250
bq24195LRGER
3000
bq24195L
bq24195L
24-pin 4mmx4mm VQFN
bq24195LRGET
250
2
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