UNISONIC TECHNOLOGIES CO., LTD UB242 Preliminary CMOS IC LITHIUM-ION/POLYMER BATTERY PROTECTION IC DESCRIPTION UTC UB242 is a series of lithium-ion / lithium-polymer rechargeable battery protection ICs incorporating high accuracy voltage detection circuits and delay circuits. UTC UB242 is suitable for protection of single cell lithium-ion / lithium polymer battery packs from overcharge, over discharge and over current. The ultra-small package and less required external components make it ideal to integrate the UTC UB242 into the limited space of battery pack. * * * * * * * * * * 6 5 4 1 3 SOT-26 FEATURES Wide supply voltage range: Ultra-low quiescent current: Ultra-low power-down current: Overcharge detection voltage: Overcharge release voltage: Over discharge detection voltage : Over discharge release voltage: Over current detection voltage: Short circuit detection voltage: Charger detection voltage: Reset resistance for over current protection: 2 VDD=1.8V~9.0V IDD=3.0μA (VDD=3.9V) IPD=0.1μA (VDD=2.0V) VOCU=4.200V~4.400V VOCR=4.005V~4.225V VODL=2.15V~3.00V VODR=2.32V~3.10V VOI1=0.05V~0.20V VOI2=1.35V (Fixed) VCH=-0.7V RSHORT＞500kΩ * Delay times are generated by an internal circuit. (External capacitors are unnecessary.) * Halogen Free ORDERING INFORMATION Ordering Number UB242xG-AG6-R Package SOT-26 Packing Tape Reel MARKING www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd 1 of 13 QW-R502-307.c UB242 Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO 1 2 3 4 PIN NAME OD CSI OC DS 5 VDD Positive power input 6 VSS Negative power input CMOS IC DESCRIPTION For discharge control: FET gate connection pin For current sense Input pin, and charge detect For charge control :FET gate connection pin For reduce delay time: test pin SERIAL CODE LIST Model Code Overcharge Detection Voltage [VOCU](V) UB242 A B C D E F G H 4.325±0.050 4.350±0.050 4.325±0.050 4.300±0.050 4.300±0.050 4.275±0.050 4.280±0.050 4.250±0.050 Overcharge Release Voltage [VOCR](V) Over discharge Detection Voltage [VODL](V) Over discharge Release Voltage [VODR](V) Over Current Detection Voltage [VOI1](mV) 4.075±0.050 4.150±0.050 4.075±0.050 4.080±0.050 4.080±0.050 4.175±0.050 4.175±0.050 4.055±0.050 2.50±0.10 2.30±0.10 2.50±0.10 2.50±0.10 2.50±0.10 2.30±0.08 2.90±0.10 2.25±0.10 2.90±0.10 3.00±0.10 2.90±0.10 2.90±0.10 2.90±0.10 2.45±0.08 3.00±0.10 2.85±0.10 100±30 100±30 150±30 150±30 100±30 100±30 150±30 150±30 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 13 QW-R502-307.c UB242 Preliminary CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 13 QW-R502-307.c UB242 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 OC output pin voltage VOC VDD-15 ~ VDD+0.3 V OD output pin voltage VOD VSS-0.3 ~ VDD+0.3 V CSI input pin voltage VCSI VDD-15 ~ VDD+0.3 V DS input pin voltage VDS VSS-0.3 ~ VDD+03 V Operating Temperature TORP -40 ~ +85 °С Storage Temperature TSTG -40 ~ +125 °С 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, DS=Floating, Ta=25°С unless otherwise specified) PARAMETER CURRENT CONSEMPTION Supply Current Power-Down Current OPERATING VOLTAGE Operating Input Voltage DETECTION VOLTAGE SYMBOL IDD IPD VDS1 TEST CONDITIONS MIN VDD=3.9V VDD=2.0V VDD-VSS 9.0 V 500 650 kΩ -1.2 -0.7 -0.2 V 0.7 10 100 6 5 5 1.3 20 180 11 10 10 1.9 30 260 17 20 50 s ms ms ms ms µs VODL Overdischarge Release Voltage VODR Over Current Detection Voltage VOI1 Short Circuit Detection Voltage Reset Resistance For Over Current Protection Charger Detection Voltage DELAY TIME VOI2 VDD=3.0V RSHORT VDD=3.6V TOD μA μA 350 Overdischarge Detection Voltage Overdischarge Detection Delay Time 6.0 0.1 V VOCR VDD=3.6V to4.5V, DS=Floating VDD=3.6V to 4.5V, VDS=VDD VDD=3.6V to 2.0V, DS=Floating VDD=3.6V to 2.0V, VDS=VDD VDD=3.0V VDD=3.0V 3.0 1.35 Overcharge Release Voltage VOCU -0.050 VOCR -0.050 VODL -0.100 VODR -0.100 VOI1 -0.030 1.0 TOC UNIT VOCU +0.050 VOCR +0.050 VODL +0.100 VODR +0.100 VOI1 +0.030 1.75 VOCU Overcharge Detection Delay Time MAX 1.8 Overcharge Detection Voltage VCH TYP VOCU VOCR VODL VODR VO/1 Over Current Detection Delay Time TOI1 Short Circuit Detection Delay Time TOI2 OTHER OC Pin Output “H” Voltage VOH1 VDD=3.9V, IOH=-50μA 3.4 3.7 OC Pin Output “L” Voltage VOL1 VDD=4.5V, CSI=0V 0.1 0.5 OD Pin Output “H” Voltage VOH2 VDD=3.9V, IOH=-50μA 3.4 3.7 OD Pin Output “L” Voltage VOL2 VDD=2.0V, IOL=50μA 0.1 0.5 Note: If VDS=VDD, the delay time will be reduced, and the test time for VOCU or VODL will also be reduced. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw V V V V V V V V V 4 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 13 QW-R502-307.c UB242 1. Preliminary CMOS IC DESCRIPTION OF OPERATION Normal Condition The voltage of the battery connected between VDD and VSS can be monitored by the UB242.The voltage difference between CSI and VSS can sense the charge and discharge scheme. Under this condition: VODL<VDD<VOCU and VCH<VCSI<VOI1, UB242 will turn on the M2 (charging) and M1 (discharging) control MOSFETs. 2. Overcharge Condition M2 will be turned off under this condition: 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). 3. Release of Overcharge Condition Two ways to return to normal condition from overcharge condition: (1.) Under the condition: the battery is self discharging, and if VDD<VOCR and VOI1>VCSI>VCH occurs, UB242 will be back to normal condition. (2.) Connect UB242 to a load and remove the charger. 4. Overdischarge Condition M1 will be turned off to stop discharging 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).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: (1.) If VCSI<VCH (Charger detection), when VDD>VODL (2.) If VCH<VCSI<VOI2, the condition VDD>VODR 6. Charger Detection Charger detection is this action: while connecting to a charger after entering into power-down mode, then if VDD<VCH, M1 will be turned on when VDD>VODL, and then 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 M2 will be turned off to stop this charging status. 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: M1 will be turned off 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, M1 will be turned on and the back to normal condition. 10. DS Pin The delay time of the overcharge and overdischarge can be reduced to within 50ms by forcing DS to VDD. A 1.6MΩ pull down resistor should be connected between DS pin and VSS internally. In the actual application DS pin should be left open or connected to VSS. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM 1. Overcharge Condition Î Self Discharge Î Normal Condition Charger Load VOCU VOCR VODR VODL VDD CSI VDD VSS VDD VSS VCH TOC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Self Discharge 7 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM(Cont.) 2. Overcharge Condition Î Load Discharge Î Normal Condition Charger Load VOCU VOCR VODR VODL VDD CSI VDD VSS VDD VOI1 VSS VCH TOC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TOC 8 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM(Cont.) 3. Overcharge Condition Î Charger remains connected and VCSI>VCH Î Self Discharge Charger Load VOCU VOCR VODR VODL VDD CSI VDD VSS VDD VSS VCH TOC TOC Self Discharge UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Self Discharge 9 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM(Cont.) 4. Overcharge Condition Î Charger remains connected and VCSI<VCH Î Self Discharge Charger Load VOCU VOCR VODR VODL VDD CSI VDD VSS VDD VSS VCH TOC TOC Self Discharge UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM(Cont.) 5. Overdischarge Condition Î Charging By a Charger Î Normal Condition Charger Battery Voltage Load VOCU VOCR VODR VODL OC Pin VDD CSI OD Pin VDD CSI Pin VSS VDD VOI2 VSS VCH TOD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TOD 11 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM(Cont.) 6. Overdischarge Condition Î Abnormal Charger Current Condition Î Normal Condition Charger Battery Voltage Load VOCU VOCR VODR VODL OC Pin VDD CSI OD Pin VDD CSI Pin VSS VDD VOI2 VSS VCH TOD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TOC 12 of 13 QW-R502-307.c UB242 Preliminary CMOS IC TIMING DIAGRAM(Cont.) 7. Over Current and Short Circuit Condition Î Normal Condition Charger OC Pin Battery Voltage Load VOCU VOCR VODR VODL VDD OD Pin CSI VDD CSI Pin VSS 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 13 of 13 QW-R502-307.c