BBK PV420S, Service Manual

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SLUS530D − SEPTEMBER 2002 − REVISED SEPTEMBER 2003
FEATURES
Small 3 mm
×
3 mm MLP (QFN) Package
Ideal for Low-Dropout Designs for Single-Cell
Li−Ion or Li−Pol Packs in Space Limited
Applications
Integrated Power FET and Current Sensor for
Up to 1-A Charge Applications
Reverse Leakage Protection Prevents Battery
Drainage
Integrated Current and Voltage Regulation
±
0.5% Voltage Regulation Accuracy
Charge Termination by Minimum Current
and Time
Precharge Conditioning With Safety Timer
Status Outputs for LED or System Interface
Indicates Charge and Fault Conditions
Battery Insertion and Removal Detection
Works With Regulated and Unregulated
Supplies
Short-Circuit Protection
APPLICATIONS
Cellular Phones
PDAs, MP3 Players
Digital Cameras
Internet Appliances
DESCRIPTION
The bqTINY series are highly integrated Li-Ion and
Li-Pol linear charge management devices targeted at
space limited portable applications. The bqTINY
series offer integrated powerFET and current sensor,
reverse blocking protection, high accuracy current and
voltage regulation, charge status, and charge
termination, in a small package.
The bqTINY charges the battery in three phases:
conditioning, constant current, and constant voltage.
Charge is terminated based on minimum current. An
internal charge timer provides a backup safety feature
for charge termination. The bqTINY
automatically
re-starts the charge if the battery voltage falls below an
internal threshold. The bqTINY
automatically enters
sleep mode when V
CC
supply is removed.
In addition to the standard features, different versions
of the bqTINY
offer a multitude of additional features.
These include temperature sensing input for detecting
hot or cold battery packs; power good (PG) output
indicating the presence of input power; a TTL−level
charge-enable input (CE) used to disable or enable the
charge process; and a TTL-level timer and termination
enable (TTE) input used to disable or enable the
fast-charge timer and charge termination.
UDG−02106
RSET
1
2
3
4
10
9
8
5
IN
VCC
OUT
VSS
STAT1
STAT2 7
6
BAT
PG
ISET
bq24012DRC
+
BATTERY
PACK
PACK+
PACK−
SYSTEM
SYSTEM
INTERFACE
CE
AC ADAPTER
bqTINYis a trademark of Texas Instruments Incorporated.
!"#$%&" ' ()##*& %' "! +),(%&" -%&*. #"-)(&'
("!"#$ &" '+*(!(%&"' +*# &/* &*#$' "! *0%' '&#)$*&' '&%-%#- 1%##%&2.
#"-)(&" +#"(*''3 -"*' "& *(*''%#,2 (,)-* &*'&3 "! %,, +%#%$*&*#'.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
www.ti.com
Copyright

2002−2003, Texas Instruments Incorporated