LP3947ISD-51 ,USB/AC Adaptor, Single Cell Li-Ion Battery Charger ICPin DescriptionPin # Name Description1 EN Charger Enable Input. Internally pulled high to CHG-IN pi ..
LP3947ISD-51 ,USB/AC Adaptor, Single Cell Li-Ion Battery Charger ICFeaturesn Programmable Current Sourcesn Supports USB Charging Schemen Integrated Pass TransistorTyp ..
LP3947ISD-51/NOPB ,USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC 14-WSON -40 to 85FEATURES DESCRIPTIONThe LP3947 is a complete charge management23• Supports USB Charging Schemesyste ..
LP3947ISDX-09 ,USB/AC Adaptor, Single Cell Li-Ion Battery Charger ICGeneral Descriptionn Monitors Battery TemperatureThe LP3947 is a complete charge management system ..
LP3950SL ,2.7 V to 2.9 V, color LED driver with audio synchronizerApplicationscolor LEDs (or RGB LEDs) can also be programmed ton Cellular phones, MP3/CD/minidisc pl ..
LP3950SL ,2.7 V to 2.9 V, color LED driver with audio synchronizerFeaturesn Audio synchronization for color LEDs with two modes:TheLP3950isacolorLEDdriverwithbuiltin ..
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1030C , QUADRUPLE LOW-POWER LINE DRIVER
LT1030CD ,Quadruple Low-Power Line Drivermaximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
LT1030CDR ,Quadruple Low-Power Line Drivermaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
LP3947ISD-51-LP3947ISDX-09
USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC
LP3947
USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC
General DescriptionThe LP3947isa complete charge management system that
safely charges and maintainsa Li-Ion battery from either
USB power source orAC adaptor.In USB mode,the LP3947
supports chargingin low poweror high power mode. Alter-
natively, the LP3947 can take charge fromAC adaptor.In
both USB andAC adaptor modes, charge current, battery
regulation voltage, and Endof Charge (EOC) point canbe
selectedviaI2C interface. The LP3947 can also operateon
default values that are pre-programmedin the factory. The
battery temperatureis monitored continuouslyattheTspin safeguard against hazardous charging conditions. The
charger also has under-voltage and over-voltage protection wellasan internal5.6hr timerto protectthe battery. The
pass transistor and charge current sensing resistor areall
integrated insidethe LP3947.
The LP3947 operatesin four modes: pre-qualification, con-
stant current, constant voltage and maintenance modes.
There are two open drain outputsfor status indication.An
internal amplifier readily converts the charge current intoa
voltage. Also, the charger can operateinan LDO mode
providinga maximumof 1.2 Amptothe load.
Features Supports USB Charging Scheme Integrated Pass Transistor Near-Depleted Battery Preconditioning Monitors Battery Temperature Built-In 5.6 hour timer Under Voltage and Over Voltage Lockout Charge Status Indicators Charge Current Monitor Analog Output LDO Mode Operation can source1 Amp Continuous Over Current/Temperature Protection
Key Specifications 1% Charger Voltage Accuracy Over 0˚C≤TJ≤ 85˚C 4.3Vto 6.0V Input Voltage Range 100 mAto 750 mA charge current range,in charger
mode 100mAto 500mA charge current range,in USB mode LLP Package Power Dissipation: 2.7WatTA= 25˚C
Applications Cellular Phones PDAs Digital Cameras USB Powered Devices Programmable Current Sources
Typical Application CircuitMore Application Circuitcanbe foundinthe Application Note section.
November 2004
LP3947
USB/AC
Adaptor
Single
Cell
Li-Ion
Battery
Charger
