LP4054HB5F

Preliminary Datasheet LP4054H 600mA Standalone Linear Li-Ion Battery Charger General Description The LP4054H is a complete constant-current/constant- voltage Features linear charger for single cell lithium-ion batteries. Its SOT23-5  Programmable Charge Current Up to 600mA package and low external component count make the LP4054H  No MOSFET, Sense Resistor or Blocking Diode Required ideally suited for portable applications. Furthermore, the  Constant-Current/Constant-Voltage Operation with LP4054H 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 ambient temperature. The charge voltage is fixed at 4.2V, and Thermal Regulation to Maximize  Charge Rate Without Risk of Overheating  4.2V Charge Voltage with ± 1% Accuracy  Charge Current Monitor Output for Gas Gauging  Automatic Recharge the charge current can be programmed externally with a single  3V Trickle Charge Threshold resistor. The LP4054H automatically terminates the charge  Charging OTP cycle when the charge current drops to 1.5/10th the  Package in SOT23-5/SOT23-6 programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the LP4054H automatically enters a low current state, dropping the Typical Application Circuit battery drain current to less than 1µA. Other features include charge current monitor, automatic recharge and a status pin to VIN VIN indicate charge termination and the presence of an input CBAT 10uF 1Ω voltage. 2K CIN 10uF ISET Order Information LP4054H Battery VBAT STAT1 □□ □ STAT2 RSET GND F:Pb-Free Package Type B5:SOT23-5 Marking Information B6:SOT23-6 Applications  Portable Media Players/MP3 players  Cellular and Smart mobile phone  PDA/DSC  Bluetooth Applications Part Marking Package Shipping LP4054HB5F LP4054 SOT23-5 3K/REEL SOT23-6 3K/REEL HYWX LP4054HB6F LP4054 HYWX Marking indication: Y:Production year W:Production week X:Production batch. LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 8 Preliminary Datasheet LP4054H Functional Pin Description SOT23-6 SOT23-5 Package Type Top View STAT1 1 GND 2 BAT 3 Top View 5 ISET STAT1 1 6 ISET GND 2 5 STAT2 BAT 3 4 Pin Configurations Pin SOT23-5 SOT23-6 4 VIN Name VIN Description Open-Drain Charge Status Output. When the battery is charging, the STAT pin 1 1 STAT1 is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, the pin is pulled High. 2 2 GND 3 3 BAT 4 4 VIN Ground. Charge Current Output. Provides charge current to the battery and regulates the final float voltage to 4.2V. Positive Input Supply Voltage. Open-Drain Charge Status Output. When the battery is charging, the STAT pin 5 STAT2 is pulled High by an internal N-channel MOSFET. When the charge cycle is completed, the pin is pulled Low. Charge Current Program and Charge Current Monitor Pin. The charge current is programmed by connecting a 1% resistor, RISET, to ground. When charging in 5 6 ISET 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: IBAT=1000/RISET LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 8 Preliminary Datasheet LP4054H Function Block Diagram VIN 1000X 1X - BAT + MA R1 VA CA - + STAT1 SHDN C1 + - + R3 R2 REF R4 C2 STAT2 C3 + - + R5 TO BAT VCC ISET GND Absolute Maximum Ratings Note1  Input to GND(VIN) ----------------------------------------------------------------------------------------------------- -0.3V to 8V  Other Pin to GND ------------------------------------------------------------------------------------------------------ -0.3V to 6V  BAT Short-circuit Duration ------------------------------------------------------------------------------------------- Continuous  Maximum Junction Temperature ----------------------------------------------------------------------------------------- 125℃  Operating Junction Temperature Range (TJ) --------------------------------------------------------------- -20℃ to 85℃  Maximum Soldering Temperature (at leads, 10 sec) -------------------------------------------------------------- 260℃ Note1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Thermal Information  Maximum Power Dissipation (SOT23-5, PD, TA=25°C) ----------------------------------------------------------- 0.45W  Thermal Resistance (SJA) ---------------------------------------------------------------------------------------------- 250℃/W ESD Susceptibility  HBM(Human Body Mode) ---------------------------------------------------------------------------------------------------- 2KV  MM(Machine Mode) ------------------------------------------------------------------------------------------------------------ 200V LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 8 Preliminary Datasheet LP4054H Electrical Characteristics (TA = 25℃. VIN = 5V, unless otherwise noted.) SYMBOL PARAMETER VIN Adapter/USB Voltage Range IIN Input Supply Current Standby Mode (Charge Terminated) VFLOAT Regulated Output (Float) Voltage IBAT = 40mA IBAT BAT Pin Current CONDITIONS MIN TYP. MAX UNITS 4.5 5 6.5 V 50 4.158 4.2 RISET = 10K，Current Mode 100 RISET = 2K，Current Mode 500 Standby Mode, VBAT = 4.2V Sleep Mode, VIN = 0V uA 4.242 V mA ±1 uA VTRIKL Trickle Charge Threshold Voltage RISET = 10k, VBAT Rising 3 V VTRHYS Trickle Charge Hysteresis Voltage RISET = 10K 150 mV ITRIKL Trickle charge current VBAT < VTRIKL, RISET =10K 40 VBAT < VTRIKL, RISET=2K 200 VUV VIN Undervoltage Lockout Threshold From VIN Low to High 3.8 V VUVHYS VIN Undervoltage Lockout Hysteresis 200 mV VASD VIN–VBAT Lockout Threshold Voltage 150 mV ITERM C/10 Termination Current Threshold 15 % IBAT VISET ISET Pin Voltage RISET = 10K,Charge Mode 1 V VSTAT STAT1/STAT2 Pin Output Low Voltage ISTAT = 5mA 0.5 V ISTAT STAT1/2 Pin Weak Pull-Down Current ICHRG = 5V 5 uA ΔVRECHRG Recharge Battery Threshold Voltage VFLOAT - VRECHRG LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com 200 www.lowpowersemi.com mA mV Page 4 of 8 Preliminary Datasheet Applications Information The LP4054H is a single cell lithium-ion battery charger using a constant-current/constant-voltage algorithm. It can deliver up to 600mA of charge current (using a good thermal PCB layout) with a final float voltage accuracy of ± 1%. The LP4054H includes an internal P-channel power MOSFET and thermal regulation circuitry. No blocking diode or external current sense resistor is required; thus, the basic charger circuit requires only three external components. Furthermore, the LP4054H is capable of operating from a USB power source. Normal Charge Cycle LP4054H Charge Status Indicator (CHRG) The charge status output has two different states: strong pull-down (~5mA) and high impedance. The strong pull-down state indicates that the LP4054H is in a charge cycle. High impedance indicates that the charge cycle complete or the LP4054H is in under voltage lockout mode: either VIN is less than 150mV above the BAT pin voltage or insufficient voltage is applied to the VIN pin. A microprocessor can be used to distinguish between these two states. Charge Stage STAT1 Status STAT2 Status Charging Low High Charge Complete High Low A charge cycle begins when the voltage at the VIN pin rises above the UVLO threshold level and a 1% program resistor is connected from the ISET pin to ground or when a battery is connected to the charger output. If the BAT pin is less than 2.9V, the charger enters trickle charge mode. When the BAT pin voltage rises above 2.9V, the charger enters constant-current mode, where the programmed charge current is supplied to the battery. When the BAT pin approaches the final float voltage (4.2V), the LP4054H enters constant-voltage mode and the charge current begins to decrease. When the charge current drops to 1.5/10 of the programmed value the charge cycle ends. Charge Termination A charge cycle is terminated when the charge current falls to 1.5/10th the programmed value after the final float voltage is reached. This condition is detected by using an internal, filtered comparator to monitor the ISET pin. When the ISET pin voltage falls below 100mV for longer than TTERM (typically 1ms), charging is terminated. The charge current is latched off and the LP4054H enters standby mode, where the input supply current drops to 50µA. When charging, transient loads on the BAT pin can cause the ISET pin to fall below 150mV Programming Charge Current for short periods of time before the DC charge current has The charge current is programmed using a single resistor dropped to 1.5/10th the programmed value. The 1ms filter from the ISET pin to ground. The battery charge current is time (TTERM) on the termination comparator ensures that 1000 times the current out of the ISET pin. The program transient loads of this nature do not result in premature resistor and the charge current are calculated using the charge cycle termination. Once the average charge current following equations: drops below 1.5/10th the programmed value, the LP4054H terminates the charge cycle and ceases to provide any RISET=1000÷IBAT, current through the BAT pin. In this state, all loads on the BAT IBAT=1000÷RISET pin must be supplied by the battery. The LP4054H constantly The charge current out of the BAT pin can be determined at monitors the BAT pin voltage in standby mode. If this voltage any time by monitoring the ISET pin voltage using the following equation: IBAT=VISET÷RISET×1000 LP4054H-00 Aug.-2018 drops below the 4.0V recharge threshold (VRECHRG), another charge cycle begins and current is once again supplied to the battery. To manually restart a charge cycle when in standby mode, the input voltage must be removed and reapplied. Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 5 of 8 Preliminary Datasheet Thermal Limit LP4054H VIN Bypass Capacitor An internal thermal feedback loop reduces the programmed Many types of capacitors can be used for input bypassing; charge current if the die temperature attempts to rise above a however, caution must be exercised when using multilayer preset value of approximately 125℃. This feature protects the ceramic capacitors. Because of the self-resonant and high Q LP4054H from excessive temperature and allows the user to characteristics of some types of ceramic capacitors, high push the limits of the power handling capability of a given voltage transients can be generated under some start-up circuit board without risk of damaging the LP4054H. The conditions, such as connecting the charger input to a live charge current can be set according to typical (not worst-case) power source. Adding a 1.5Ω resistor in series with an X5R ambient temperature with the assurance that the charger will ceramic capacitor will minimize start-up voltage transients. automatically reduce the current in worst-case conditions. Automatic Recharge Layout Considerations  Once the charge cycle is terminated, the LP4054H continuously monitors the voltage on the BAT pin using a keep their traces short and wide.  comparator with a 2ms filter time (TRECHARGE). A charge cycle restarts when the battery voltage falls below 4.0V (which For the main current paths as indicated in bold lines, Put the input capacitor as close as possible to the device pins (VIN and GND).  Connect all analog grounds to a command node and corresponds to approximately 80% to 90% battery capacity). then connect the command node to the power ground This ensures that the battery is kept at or near a fully charged behind the output capacitors. condition and eliminates the need for periodic charge cycle initiations. CHRG output enters a strong pull-down state during recharge cycles. Power Dissipation The conditions that cause the LP4054H to reduce charge current through thermal feedback can be approximated by considering the power dissipated in the IC. Nearly all of this power dissipation is generated by the internal MOSFET—this is calculated to be approximately: PD=(VIN－VBAT) × IBAT LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 6 of 8 Preliminary Datasheet LP4054H Packaging Information SOT23-5 LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 7 of 8 Preliminary Datasheet LP4054H SOT23-6 LP4054H-00 Aug.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 8 of 8