UB2012XG-S08-R

UNISONIC TECHNOLOGIES CO., LTD UB2012 Preliminary LINEAR INTEGRATED CIRCUIT ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYMER DESCRIPTION UTC UB2012 is designed for portable electronics with lower cost. Its advantages of high-accuracy voltage/current regulation, charging status indication, temperature monitoring, and automatic charge-rate compensation. In applications, the battery temperature is continuously under monitor by using an external thermistor, if the temperature is over user-defined threshold; UTC UB2012 inhibits charge for safety concern. Generally, the UB2012 charges the battery in conditioning, constant voltage and constant current phases. If the battery voltage is lower than the low-voltage threshold (VMIN), a low current is used for conditioning the battery. The conditioning charge rate is around 10% of the regulation current and the heat dissipation in the external pass element during the initial stage of the charge is minimized by the conditioning current. After the conditioning phase, the UB2012 applies a constant current that be set by an external sense-resistor to the battery. The sense-resistor can be on the battery without additional components. The constant current phase continues until the battery reaches the charge-regulation voltage, then the constant voltage phase is beginning. UTC UB2012 offers 4.1V, 4.2V, 8.4V and 8.4V fixed-voltage for single and dual cells. Charge stops when the current tapers to the charge termination threshold (ITERM) and will recharge if the battery voltage falls below the VRCH. The automatic charge-rate compensation feature reduces the charging time of batteries. For the internal impedance of battery pack during charge, this advanced technique offers safe and dynamic compensation. FEATURES * * * * * * * * * * * * Ideal for Single 4.1V,4.2 V and Dual-Cell 8.2,8.4 V Li-Ion or Li-Pol Packs 0.3V Dropout Voltage for Minimizing Heat Dissipation Better than ±1% Accuracy of Voltage Regulation With Preset Voltages Dynamic Compensation of Battery Pack’s Internal Impedance to short Charging Time Optional Cell-Temperature Monitoring Integrated Voltage and Current Regulation With Programmable Charge-Current Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Charge Stage Charge Status Output for Single or Dual Led or Host Processor Interface Automatic Battery-Recharge Feature Charge Termination by Minimum Current Automatic Low-Power Sleep Mode When VCC is Removed EVMs Available for Quick Evaluation ORDERING INFORMATION Ordering Number Package UB2012xG-S08-R SOP-8 x: Output Voltage, refer to Marking Information. Packing Tape Reel Note: www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 17 QW-R121-018.b UB2012 PACKAGE Preliminary LINEAR INTEGRATED CIRCUIT MARKING INFORMATION VOLTAGE CODE A: 4.1V B: 4.2V C: 8.2V D: 8.4V MARKING SOP-8 PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 PIN NAME SNS BAT VCC TS STAT VSS CC COMP I/O I I I I O O I PIN DESCRIPTION Current sense input Voltage sense input Supply voltage Temperature sense input Charge status output Ground Charge control output Charge-Rate compensation input (Auto Comp) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 17 QW-R121-018 .b UB2012 BLOCK DIAGRAM Preliminary LINEAR INTEGRATED CIRCUIT VCC Reference VO(REG) V(TS) TS VCC V(TS) VO(REG) V(BAT) Sleep Mode V(BAT) COMP G(COMP) Voltage Regulation TS1 V(TS) TS2 V(BAT) Battery Recharge Control Logic CC V(BAT) Battery Conditioning Driver SNS V(SNS) V(SNS) VCC-V(SNS) VSS-V(SNS) High/Low SNS Set Driver VCC VCC/2 V(SNS) STAT Current Regulation Driver Voltage Termination VSS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 17 QW-R121-018 .b UB2012 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage (VCC with respect to GND) VCC -0.3 ~ +15 V Input Voltage, SNS, BAT,TS, COMP VIN -0.3 ~ VCC +0.3 V (all with respect to GND) Sink Current (Note 2) STAT pin ISINK 20 mA Source Current (Note 2) STAT pin ISOURCE 10 mA Output Current (Note 2) CC pin IOUT 40 mA Power Dissipation (Ta=25°C) PD 300 mW Operating Temperature TOPR -20 ~ +70 °C Storage Temperature TSTG -40 ~ +125 °C Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. Not to exceed PD. RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Operating Free-Air Temperature Range SYMBOL VCC TA MIN 4.5 -20 TYP MAX 12 70 UNITS V °C ELECTRICAL CHARACTERISTICS PARAMETER VCC Current SYMBOL CONDITIONS I(VCC) VCC>VCC(MIN), Excluding external loads UB2012A UB2012B V(BAT)≥V(MIN) VCC Sleep Current I(VCCS) V(BAT)-VCC≥0.8V UB2012C UB2012D BAT Pin IIB(BAT) V(BAT)=V(REG) SNS Pin IIB(SNS) V(SNS)=5V Input Bias Current TS Pin IIB(TS) V(TS)=5V COMP Pin IIB(COMP) V(COMP)=5V BATTERY VOLTAGE REGULATION UB2012A UB2012B Output Voltage VO(REG) See Notes UB2012C UB2012D CURRENT REGULATION UB2012A UB2012B current sensing Current Regulation Threshold V(SNS) configuration UB2012C UB2012D CHARGE TERMINATION DETECTION Charge Termination Current I(TERM) Voltage at pin SNS, 0°C≤Ta≤50°C Detect Threshold MIN TYP 2 3 MAX 5 6 10 1 5 5 5 4.050 4.150 8.100 8.300 80 105 4.10 4.20 8.20 8.40 100 125 4.150 4.250 8.300 8.500 120 145 UNITS mA μA μA μA μA μA μA V V V V mV mV -24 -14 -4 mV UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 17 QW-R121-018 .b UB2012 Preliminary LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS TEMPERATURE COMPARATOR Lower V(TS1) Temperature Threshold Upper V(TS2) PRECHARGE COMPARATOR Precharge Threshold V(MIN) 29.1 58.3 UB2012A UB2012B UB2012C UB2012D 2.94 3.04 5.98 6.18 30 60 3.0 3.1 6.1 6.3 13 3 13 22 30.9 61.8 3.06 3.16 6.22 6.42 %VCC %VCC V V V V mV mV TS Pin Voltage PRECHARGE CURRENT REGULATION Voltage at pin SNS, 0°C≤Ta≤50°C I(PRECHG) Voltage at pin SNS, 0°C≤Ta≤50°C, VCC = 5 V VRCH COMPARATOR (BATTERY RECHARGE THRESHOLD) UB2012A UB2012B Recharge Threshold V(RCH) UB2012C UB2012D CHARGE-RATE COMPENSATION (Automatic Charge-Rate Compensation) Precharge Current Regulation Automatic Charge-Rate Compensation Gain G(COMP) V(BAT)+0.3V≤VCC≤VCC(MAX), VO(REG) VO(REG- VO(REG) -80mV -100mV -120mV VO(REG) VO(REG) VO(REG) -160mV -200mV -240mV V V 1.7 2.2 2.7 V/V STAT PIN Output (Low) Voltage VOL(STAT) Output (High) Voltage VOH(STAT) CC PIN Output Low Voltage VOL(CC) Sink Current IO(CC) Notes: V(BAT) +0.3 V≤VCC≤VCC(MAX) IOL=10mA IOH=5mA IO(CC)=5mA (sink) Not to exceed power rating (PD) 0.7 VCC-0.5 1.5 40 V V V mA 5 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 17 QW-R121-018 .b UB2012 DC+ RSNS 0.2Ω Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT PACK+ Q1 2SB1151 R1 1kΩ CC COMP RT1 TEMP Battery Pack VCC C1 0.1μF PACKNTC VCC SNS UB2012 BAT VCC TS C2 10μF GND R2 2kΩ VSS STAT D1 RT2 Figure 1. Low Dropout Single-or Two-Cell Li-Lon/Li-Pol Charger FUNCTIONAL DESCRIPTION The UTC UB2012 is designed for the applications of single or two-cell Li-Ion or Li-Pol batteries. Figure 1 is the schematic of using this advanced linear charge controller with a PNP pass transistor. Figure 2 is the operation flowchart of UB2012. Figure 3 shows the typical charge profile. Figure 4 is the application schematic of a charger using P-channel MOSFET.. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 17 QW-R121-018 .b UB2012 POR Preliminary LINEAR INTEGRATED CIRCUIT APPLICATION INFORMATION VCC>V(BAT) Checked at All Times Sleep Mode No Indicate SLEEP MODE (STAT=Hi-Z) Yes Suspend Charge TS Pin in TS1 to TS2 Range No Indicate CHARGE SUSPEND (STAT=Hi-Z) Yes Regulate I(PRECHG) V(BAT)