UNISONIC TECHNOLOGIES CO., LTD UB24205 Preliminary CMOS IC LITHIUM-ION/POLYMER BATTERY PROTECTION IC DESCRIPTION The UTC UB24205 is a lithium-ion / lithium-polymer rechargeable battery protection IC with internal MOSFETs. It incorporates high accuracy voltage detection circuits and delay circuits. The UTC UB24205 is suitable for protection of single cell lithium-ion / lithium polymer battery packs from overcharge, over discharge and over current. The small package and less required external components make it ideal to be integrated into limited space of battery pack. * * * * * * * * * * * * * * FEATURES Wide supply voltage range: VDD=1.8V~9.0V Ultra-low quiescent current: IDD=3.0μA (VDD=3.9V) Ultra-low power-down current: IPD=0.1μA (VDD=2.0V) Overcharge detection voltage: VOCU=4.250V±0.050V Overcharge release voltage: VOCR=4.055V±0.050V Over discharge release voltage: VODL=2.250V±0.100V Over discharge detection voltage: VODR=2.850V±0.100V Over current detection voltage: VOI1= 0.150V±0.030V Short circuit detection voltage: VOI2=1.35V (Fixed) Charger detection voltage: VCH=-0.7V Reset resistance for over current protection: RSHORT>500kΩ No external MOSFETs Delay times are generated by an internal circuit (External capacitors are unnecessary). Halogen Free ORDERING INFORMATION Ordering Number UB24205G-S08-R Package SOP-8 www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd Packing Tape Reel 1 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC PIN CONFIGURATION BATN 1 8 DRAIN PVSS 2 7 DRAIN CSI 3 6 VSS VDD 4 5 VSS PIN DESCRIPTION PIN NO. 1 2 3 4 5,6 7,8 PIN NAME BATN PVSS CSI VDD VSS DRAIN DESCRIPTION Negative charge input, and load negative input Negative battery Input Current sense Input, and charge detect Positive power input Negative power input Output: the drain terminals of two internal MOSFETs UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC BLOCK DIAGRAM VDD Charger Detector Overdischarge Detector Short circuit Detector CSI Overcharge Detector Oscillator and Divider Over current Detector VSS Control Logic VSS OD OC BATN PVSS DRAIN UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw DRAIN 3 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (VSS=0V, Ta=25°С, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Input voltage between VDD and VSS (Note2) VDD VSS -0.3 ~ VSS +12 V CSI input pin voltage VCSI VDD -15 ~ VDD+0.3 V BATN input pin voltage VBATN VDD -15 ~ VDD +0.3 V Operating Temperature TORP -40 ~ +85 °C Storage Temperature TSTG -40 ~ +125 °C Note: 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. Pulse (μsec) noise exceeding the above input voltage (VSS+12V) may cause damage to the IC. ELECTRICAL CHARACTERISTICS (VSS=0V, Ta=25°C, unless otherwise specified) PARAMETER CURRENT CONSEMPTION Supply Current Power-Down Current OPERATING VOLTAGE Operating Input Voltage DETECTION VOLTAGE Overcharge Detection Voltage Overcharge Release Voltage Overdischarge Detection Voltage Overdischarge Release Voltage Over Current Detection Voltage Short Circuit Detection Voltage Reset Resistance For Over Current Protection Charger Detection Voltage DELAY TIME Overcharge Detection Delay Time Overdischarge Detection Delay Time Over Current Detection Delay Time Short Circuit Detection Delay Time MOSFET Drain-Source Breakdown Voltage SYMBOL IDD IPD VDS1 VOCU VOCR VODL VODR VOI1 VOI2 RSHORT TEST CONDITIONS VDD=3.9V VDD=2.0V VDD-VSS BVDSS Drain-Source Leakage Current IDSS Gate Threshold Voltage VTH Equivalent Drain-Source On-Resistance RDS(ON) MAX UNIT 3.0 6.0 0.1 μA μA 9.0 V 1.8 VDD=3.0V 4.250 4.055 2.250 2.850 0.150 1.35 4.300 4.105 2.350 2.950 0.180 1.75 V V V V V V VDD=3.6V 350 500 650 kΩ -1.2 -0.7 -0.2 V VDD=3.6V ~ 4.5V VDD=3.6V ~ 2.0V VDD=3.0V VDD=3.0V 0.7 100 5 5 1.3 180 10 10 1.9 260 20 65 S mS mS µS VGS=0V, IDS=1μA VGS=0V, IDS=250μA VGS=0V, VDS=20.0V VGS=0V, VDS=20.6V VGS=VDS, IDS=1μA VGS=VDS, IDS=250μA VGS=2.5V, IDS=3A VGS=4.5V, IDS=1A VGS=4.5V, IDS=3A 20.0 20.6 1 250 1.4 1.4 45 35 33 V V μA μA V V mΩ mΩ mΩ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP 4.200 4.005 2.150 2.750 0.120 1.0 VCH TOC TOD TOI1 TOI2 MIN 0.6 0.6 4 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 10 QW-R121-019.a UB24205 APPLICATION INFORMATION 1. Normal Condition Preliminary CMOS IC The voltage of the battery connected between VDD and VSS can be monitored by the UTC UB24205.The voltage difference between CSI and VSS can sense the charge and discharge scheme. Under this condition: VODL<VDD<VOCU and VCH<VCSI<VOI1, the UTC UB24205 will turn on the charging control MOSFET (internal) and discharging control MOSFET (internal), the battery’s charging (or discharging) is in normal condition. 2. Overcharge Condition When the battery voltage becomes higher than the overcharge detection voltage (VOCU) during normal charging condition through a delay time longer than TOC (the overcharge detection delay time), the charging will be stopped. 3. Release of Overcharge Condition Two ways to return to normal condition from overcharge condition: 4. (1) Under the condition: the battery is self discharging, and if VDD<VOCR and VOI1>VCSI>VCH occurs, the UTC UB24205 will be back to normal condition. (2) Connect the UTC UB24205 to a load and remove the charger. Overdischarge Condition When the battery voltage falls below the overdischarge detection voltage (VODL) during discharging condition and through a delay time longer than TOD (the overdischarge detection delay time), the discharging will be stopped. And then CSI will be pulled up to VDD through an internal resistance. When VCSI>VOI2, the chip will enter into power-down mode. In this mode, the current consumption is lower than 0.1μA. 5. Release of Power-down mode There are two ways back to normal condition: 6. (1) If VCSI<VCH (Charger detection), when VDD>VODL. (2) If VCH<VCSI<VOI2, the condition VDD>VODR. Charger Detection Charger detection is this action: while connecting to a charger after entering into power-down mode, then if VDD<VCH and when VDD>VODL, the system will be back to normal condition as described in 1) of previous section. 7. Abnormal Charge Current Condition The abnormal charge current condition is when a charger is connected to the battery system in normal condition, then if VDD<VOCU and VCSI<VCH occurs through a delay time than TOC (delay time of overcharge detection), and in this condition the charging will be stopped. 8. Over Current/Short Circuit Condition The over current (or short circuit) condition is when the current is too large during discharging under normal condition as a result of the voltage detected by CSI is greater than VOI1 (or VOI2) through a delay time TOI1(TOI2). In this over current (or short circuit) condition, the discharging will be stopped and CSI will be pulled down to VSS through an internal resistance. 9. Release of Over Current/Short Circuit Condition If the load is removed or the impedance between VBAT+ and VBAT- is larger than 500kΩ as well as VCSI<VOI1, the system will be back to normal condition. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC TYPICAL CHARACTERISTICS 1. Overcharge Condition Î Self Discharge Î Normal Condition Charger Battery Voltage Load VOCU VOCR VODR VODL CSI Pin VDD VSS VCH TOC Self Discharge 2. Overcharge Condition Î Load Discharge Î Normal Condition Charger Battery Voltage Load VOCU VOCR VODR VODL CSI Pin VDD VOI1 VSS VCH TOC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TOC 7 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC TYPICAL CHARACTERISTICS(Cont.) 3. Overcharge Condition Î Charger remains connected and VCSI>VCH Î Self Discharge Charger Load VOCU VOCR VODR VODL VDD VSS VCH TOC TOC Self Discharge Self Discharge 4. Overcharge Condition Î Charger remains connected and VCSI<VCH Î Self Discharge Charger Battery Voltage Load VOCU VOCR VODR VODL CSI Pin VDD VSS VCH TOC TOC Self Discharge UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC TYPICAL CHARACTERISTICS(Cont.) 5. Overdischarge Condition Î Charging By a Charger Î Normal Condition Charger CSI Pin Battery Voltage Load VOCU VOCR VODR VODL VDD VOI2 VSS VCH TOD TOD 6. Overdischarge Condition Î Abnormal Charger Current Condition Î Normal Condition Charger CSI Pin Battery Voltage Load VOCU VOCR VODR VODL VDD VOI2 VSS VCH TOD TOC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 10 QW-R121-019.a UB24205 Preliminary CMOS IC TYPICAL CHARACTERISTICS(Cont.) 7. Over Current and Short Circuit Condition Î Normal Condition Charger Battery Voltage Load VOCU VOCR VODR VODL CSI Pin VDD VOI2 VOI1 VSS TOI1 TOI2 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 10 QW-R121-019.a