ME4064AM5G

ME4064A 800mA Lithium Ion Battery Linear Charger ME4064A General Description Features ME4064A is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the ME4064A is specifically designed to work within USB power specifications. No external sense resistor is needed and no ●Protection of battery cell reverse connection ●No MOSFET sense resistor or blocking diode required ●Complete Linear Charger in ThinSOT Package for Single Cell Lithium-Ion Batteries blocking diode is required due to the internal ●Constant-Current/Constant-Voltage operation with PMOSFET architecture .Thermal feedback regulates thermal regulation to maximize Rate Without risk the charge current to limit the die temperature during of overheating. high power operation or high ambient ● Preset 4.2V charge voltage with ±1% accuracy temperature .The charge voltage is fixed at 4.2V,and ● Automatic Recharge the charge current can be programmed externally with ●Charges Single Cell Li-Ion Batteries Directly from a single resistor. The ME4064A automatically USB Port terminates the charge cycle when the charge current ●C/10 charge termination drops to 1/10th the programmed value after the final ● 55μA supply current in shutdown float voltage is reached. ● 2.9V trickle current charge threshold When the input supply (wall adapter or USB supply) is removed the ME4064A automatically enters a low ● Soft-Start limits inrush current ●Charge Status Output Pin current state dropping the battery drain current to less than 2μA.The ME4064A can be put into shutdown Package mode reducing the supply current to 55μA. ●5-pin SOT23-5 Other features include charge current monitor, ●6-pin- DFN2*2-6L undervoltage lockout, automatic recharge and a Applications status. ●Cellular Telephones, PDAs, MP3 Players ●Charging Docks and Cradles ●Bluetooth Applications V06 www.microne.com.cn Page 1 of 18 ME4064A Typical Application Typical charge cycle（750mAh batter） 600mA Single Cell Li-Ion Charger VIN 4.5V TO 6.5V 700 CHARGE CURRENT(mA) VCC BAT 3 ME4064A GND 1μF 2 PROG 5 600mA 4.2V 1.65K Li-Ion BATTERY 4.75 CONSTANT CURRENT 600 CONSTANT 500 POWER CONSTANT 4.5 VOLTAGAE 4.25 400 4.0 300 VCC=5V 3.75 200 θ 3.5 100 RPROG=1.65K CHARGE TA=25℃ TERMINATED 0 0 JA=130℃/W 3.25 0.25 0.5 0.75 1.0 1.25 1.5 1.75 TIME(HOURS) 3.0 2.0 Selection Guide ME 4064X X X G Environment mark Package: M5-SOT23-5 N6-DFN2*2-6L Function:A Product Type Product Series Microne V06 product series product description ME4064AM5G VFLOAT =4.2V；Package：SOT23-5 ME4064AN6G VFLOAT =4.2V；Package：DFN2*2-6L www.microne.com.cn Page 2 of 18 BATTERY VOLTAGE(V) 4 ME4064A Pin Configuration Pin Assignment Pin Num. (SOT23-5) Pin Num. (DFN2*2-6L) Symbol Function Open-Drain charge status output 1 3 CHRG When the battery is being charged, the internal switch, otherwise, 2 2 GND pin is pulled low by an pin is in high impedance state. Ground Battery connection Pin Connect the positive terminal of the battery to this pin. Dropping BAT pin’s 3 1 BAT current to less than 2μA when IC in disable mode or in sleep mode. BAT pin provides charge current to the battery and provides regulation voltage of 4.2V. Positive input supply voltage Provides power to the internal circuit. When VCC drops to within 80mV of 4 6 VCC the BAT pin voltage, the ME4064A enters low power sleep mode, dropping IBAT to less than 2μA. V06 www.microne.com.cn Page 3 of 18 ME4064A Constant Charge Current Setting and Charge Current Monitor Pin The charge current is programmed by connecting a resistor RPROG from this pin to GND. When in precharge mode, the PROG pin’s voltage is regulated to 0.1V. When charging in constant-current mode this pin’s 5 4 PROG voltage is regulated to 1V. In all modes during charging, the voltage on this pin can be used to measure the charge current using the following formula: 5 NC IBAT = VPROG *1100 RPROG No Connect Block Diagram V06 www.microne.com.cn Page 4 of 18 ME4064A Absolute Maximum Ratings Parameter Rating Unit Input supply voltage : VCC -0.3～6.5 V PROG pin voltage -0.3～VCC+0.3 V BAT pin voltage -0.3～6.5 V -0.3～6.5 V BAT pin current 800 mA PROG pin current 1200 μA Maximum junction temperature 145 ℃ Operating ambient temperature :Topa -40～85 ℃ Storage temperature :Tstr -65～125 ℃ Soldering temperature and time +260（Recommended 10S） ℃ pin voltage Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. V06 www.microne.com.cn Page 5 of 18 ME4064A Electrical Characteristics Symbol Parameter Condition ICC -IBAT VFLOAL static current Max Unit 4.0 5.0 6.5 V ●Charge mode, RPROG=1.1KΩ - 150 500 μA ●Standby mode(charge end) - 55 100 μA ●Shutdown mode （ RPROG not connected, VCC