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EUP8054 Dataheets PDF



Part Number EUP8054
Manufacturers Eutech Microelectronics
Logo Eutech Microelectronics
Description Standalone Linear Li-Ion Battery Charger
Datasheet EUP8054 DatasheetEUP8054 Datasheet (PDF)

EUP8054/8054X Standalone Linear Li-Ion Battery Charger With Thermal Regulation in ThinSOT DESCRIPTION The EUP8054 is a complete constant-current/constantvoltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the EUP8054 ideally suited for portable applications. Furthermore, the EUP8054 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the.

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EUP8054/8054X Standalone Linear Li-Ion Battery Charger With Thermal Regulation in ThinSOT DESCRIPTION The EUP8054 is a complete constant-current/constantvoltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the EUP8054 ideally suited for portable applications. Furthermore, the EUP8054 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high www.DataSheet4U.com ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The EUP8054 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the EUP8054 automatically enters a low current state, dropping the battery drain current to less than 2µA. The EUP8054 can be put into shutdown mode, reducing the supply current to 25µA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. FEATURES z z z z Programmable Charge Current Up to 800mA No MOSFET, Sense Resistor or Blocking Diode Required Complete Linear Charger in ThinSOT Package for Single Cell Lithium-ion Batteries Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.2V Charge Voltage with ± 1% Accuracy Charge Current Monitor Output for Gas Gauging Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25µA Supply Current in Shutdown 2.9V Trickle Charge Threshold (EUP8054) Available Without Trickle Charge (EUP8054X) Soft-Start Limits Inrush Current Available in TSOT-25, TDFN-6(3mm*3mm) Package RoHS Compliant and 100% Lead (Pb)-Free z z z z z z z z z z z z APPLICATIONS z z z Cellular Telephones/ PDAs/ MP3 Players Charging Docks and CradIes Bluetooth Applications DS8054 Ver1.1 Jan. 2007 1 EUP8054/8054X Typical Application Circuit www.DataSheet4U.com Figure 1. 600mA Single Cell Li-ion Charger Figure 2. USB/Wall Adapter Power Li-Ion Charger Figure 3. Full Featured Single Cell Li-Ion Charger Figure 4. 800mA Li-Ion Charger with External Power Dissipation Figure 5. Basic Li-Ion Charger with Reverse Polarity Input Protection DS8054 Ver1.1 Jan. 2007 2 EUP8054/8054X Pin Configurations Package Type Pin Configurations TSOT-25 www.DataSheet4U.com TDFN-6 Pin Description PIN TSOT-25 TDFN6 DESCRIPTION CHRG GND BAT VCC PROG N/C 1 2 3 4 5 1 2 6 4 3 5 Open-Drain Status Output Ground Charge Current Output Positive Input Supply Voltage Charge Current Program, Charge Current Monitor and Shutdown Pin. No connection Pin Functions CHRG :Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, a weak pull-down of approximately 12µA is connected to the CHRG pin, indicating a “AC present” condition. When the EUP8054 detects an undervoltage lockout condition, CHRG is forced high impedance. GND : Ground. BAT : Charge Current Output. Provides charge current to the battery and regulates the final float voltage to 4.2V. An internal precision resistor divider from this pin sets the float voltage which is disconnected in shutdown mode. VCC : Positive Input Supply Voltage. Provides power to the charger. VCC can range from 4.35V to 6.5V and should be bypassed with at least a 1µF capacitor. When VCC drops to within 30mV of the BAT pin voltage, the EUP8054 enters shutdown mode, dropping IBAT to less than 2µA. DS8054 Ver1.1 Jan. 2007 3 EUP8054/8054X Pin Functions (continue) PROG: Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is programmed by connecting a 1% resistor, RPROG, to ground. When charging in constant-current mode, this pin servos to 1V. In all modes, the voltage on this pin can be used to measure the charge current using the following formula: I BAT = VPROG / R PROG • 1000 ( ) The PROG pin can also be used to shutdown the charger. Disconnecting the program resistor from ground allows a 3µA current to pull the PROG pin high. When it reaches the 1.94V shutdown threshold voltage, the charger enters shutdown mode, charging stops and the input supply current drops to 25µA. This pin is also clamped to approximately 2.4V. Driving this pin to voltages beyond the clamp voltage will draw currents as high as1.5mA. Reconnecting RPROG to ground will return the charger to normal operation. N/C: No connection. Ordering Information www.DataSheet4U.com Order Number Package Type Marking Operating Temperatur.


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