Features: · Small 3.5 mm×4.5 mm QFN package
·Designed for single-cell Li-Ion or Li-Pol based portable applications
·Integrated dynamic power-path management (DPPM) feature allowing the AC adapter or the USB port to simultaneously power the system and charge the battery
· Power supplement mode allows battery to supplement the USB or AC input current
· Autonomous power source selection (AC Adapter or USB)
· Integrated USB charge control with selectable 100-mA and 500-mA charge rates
· Dynamic total current management for USB
· Supports up to 2-A total current
· 3.3 V Integrated LDO output
· Thermal regulation for charge control
· Charge status outputs for LED or system interface indicates charge and fault conditions
· Reverse current, short-circuit and thermal protection
· Power Good (AC adapter and USB port present) Status outputs
Application· Smartphones and PDA
· MP3 players
· Digital cameras Handheld devices
· Internet appliancesSpecificationsover operating free-air temperature range (unless otherwise noted)
| |
bq24030
bq24032
bq24035 |
UNIT |
| Input voltage |
AC (DC voltage wrt VSS) |
-0.3 to 18 |
V |
| Input voltage |
BAT, CE, DPPM,ACPG, PSEL, OUT, ISET1, ISET2,STAT1, STAT2, TS, USBPG (all DC voltages wrt VSS) |
-0.3 to 7 |
| LDO (DC voltage wrt VSS) |
-0.3 to VO(OUT) + 0.3 |
| Input current |
AC |
2.75 |
A |
| USB |
600 |
mA |
| Output current |
OUT |
4 |
A |
| BAT(2) |
-4 to 1.75 |
| Output source current (in regulation at 3.3 V LDO) |
LDO |
30 |
mA |
| Output sink current |
ACPG, STAT1, STAT2, USBPG, |
1.5 |
| Storage temperature range, Tstg |
-65 to 150 |
|
| Junction temperature range, TJ |
-40 to 150 |
| Lead temperature (solderig, 10 seconds) |
300 |
(1) Stresses beyond thoselisted under "absolute maximum ratings" may cause permanent damage to thedevice. These are stress ratings only, and functional operation of the deviceat these or any other conditions beyond those indicated under "recommendedoperating conditions" is not implied. Exposure to absolute-maximum-ratedconditions for extended periods may affect device reliability. All voltagevalues are with respect to the network ground terminal unless otherwisenoted.
(2) Negative current isdefined as current flowing into the BAT pin.
DescriptionThe bqTINY-III series are highly integrated and flexible Li-Ion linear charge and system power path management devices targeted at space limited portable applications. The bqTINY-III series offer inte-grated USB-port and DC supply (AC adapter) and power-path management with autonomous power-source selection, power FET and current sensor, high accuracy current and voltage regulation,charge status, and charge termination, in a single monolithic device.
The bqTINY-III powers the system while indepen-dently charging the battery. bq24035 features reduces the charge and discharge cycles on the battery, allows for proper charge termination and allows the system to run with an absent or defective battery pack. This feature also allows for system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack.
The bqTINY-III automatically selects the USB-Port or the AC-adapter as the power source for the system. In the USB configuration ,the host can select from the 2 preset charge rates of 100mA and 500 mA.The bqTINY-III dynamically adjusts the USB charge rate based on system load to stay within the 100 mA or 500 mA charge rates. In the ac-adapter configuration an external resistor sets the magnitude of the charge current. The AC input can also be programmed using the PSEL pin to perform like a USB input.
bq24035 Data Sheet
