UNISONIC TECHNOLOGIES CO., LTD UW01+ Preliminary CMOS IC ONE CELL LITHIUM-ION / POLYMER BATTERY PROTECTION IC DESCRIPTION 6 UTC UW01+ is a lithium-ion / lithium-polymer rechargeable battery protection IC incorporating high accuracy voltage detection circuits and delay circuits. It is suitable for protection of single cell lithium-ion / lithium polymer battery packs from overcharge, over discharge and over current. The tiny package required external few components make the UTC UW01+ be able to be applied to space limited battery pack. FEATURES 5 4 1 2 3 SOT-26 * 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=4.30V±0.05V * Overcharge release voltage: VOCR=4.10V±0.05V * Overdischarge release voltage: VODL=2.40V±0.10V * Overdischarge release voltage: VODR=3.00V±0.10V * Over current detection voltage: VOI1=0.15V±0.03V * Short circuit detection voltage: VOI2=1.35V (Fixed) * Charger detection voltage: VCH=-0.7V * Delay times are generated by an internal circuit. (External capacitors are unnecessary.) ORDERING INFORMATION Ordering Number UW01+G-AG6-R Package SOT-26 Packing Tape Reel MARKING www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 11 QW-R502-321.d UW01+ Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 PIN NAME OD CSI OC DS 5 VDD Positive power input pin 6 VSS Negative power input pin CMOS IC DESCRIPTION MOSFET gate connection pin for discharge control Input pin for current sense, charger detection MOSFET gate connection pin for charge control Test pin for reduce delay time SERIAL CODE LIST Model Package Overcharge Detection Voltage [VOCU](V) UW01+ SOT-26 4.300±0.050 Overcharge Release Voltage [VOCR](V) Overdischarge Detection Voltage [VODL](V) Overdischarge Release Voltage [VODR](V) Over Current Detection Voltage [VOI1](V) 4.100±0.05 2.40±0.100 3.00±0.100 0.15±0.03 www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 2 of 11 QW-R502-321.d UW01+ Preliminary CMOS IC BLOCK DIAGRAM www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 3 of 11 QW-R502-321.d UW01+ Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (VSS=0V, Taa=25°С, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Input Voltage Between VDD And VSS 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 Operating Temperature TOPR -40~+85 °С Storage Temperature TSTG -40~+125 °С Note: 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. ELECTRICAL CHARACTERISTICS (Ta=25°С, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS CURRENT CONSUMPTION Supply Current IDD VDD=3.9V Power-Down Current IPD VDD=2.0V OPERATING VOLTAGE Operating Input Voltage VDS VDD-VSS DETECTION VOLTAGE Detection VOCU Overcharge Voltage Release VOCR Detection VODL Overdischarge Voltage Release VODR Over Current Detection Voltage VOI1 Short Circuit Detection Voltage VOI2 VDD=3.0V Charger Detection Voltage VCH DELAY TIME VDD=3.6V to 4.5V, DS=Floating Overcharge Detection Delay Time TOC VDD=3.6V to 4.5V, VDS=VDD VDD=3.6V to 2.0V, DS=Floating Overdischarge Detection Delay Time. TOD VDD=3.6V to 2.0V, VDS=VDD Over Current Detection Delay Time TOI1 VDD=3.6V Short Circuit Detection Delay Time TOI2 VDD=3.6V OTHER ITEMS High VOH1 OC Pin Output Voltage Low VOL1 High VOH2 OD Pin Output Voltage Low VOL2 www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd MIN TYP MAX UNIT 3.0 6.0 0.1 µA µA 9.0 V 4.30 4.10 2.40 3.00 0.15 1.35 -0.7 4.35 4.15 2.50 3.10 0.18 1.75 -0.2 V V V V V V V 80 5 40 2.5 10 10 200 15 100 8.5 20 50 ms ms ms ms ms µs 1.8 4.25 4.05 2.30 2.90 0.12 1.0 -1.2 VDD-0.1 VDD-0.02 0.1 VDD-0.1 VDD-0.02 0.1 0.5 0.5 V V V V 4 of 11 QW-R502-321.d UW01+ Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 5 of 11 QW-R502-321.d UW01+ Preliminary CMOS IC DESCRIPTION OF OPERATION 1. Normal Condition The UW01+ monitors the voltage of the battery connected between VDD and VSS. The charge and discharge scheme will be sensed by the voltage difference between VCSI and VSS. When VODL<VDD<VOCU and VCH<VCSI<VOI1, UW01+ will turn on the charging (M2) and discharging (M1) control MOSFETs. The charging and discharging processes can be operated normally. 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), UW01+ will turn M2 off to stop charging. 3. Release of Overcharge Condition (1) When the battery is self discharging, and if VDD<VOCR and VOI1>VCSI>VCH occurs, M2 will be turned on and back to normal condition. (2) Remove the charger and connect UW01+ to a load. The discharging current will flow through the parasitic diode of M2. At this moment, VCSI increases a voltage (VF) of the parasitic diode from the VSS level momentarily. While VCSI>VOI1 and VDD<VOCU occur, M2 will be turns on and back to normal condition. 4. Over discharge 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), UW01+ will turn M1 off to stop discharging. In the meanwhile, CSI will be pulled up to VDD through an internal resistance. If VCSI>VOI2, UW01+ will enter into power-down mode. While in this mode, the current consumption is lower than 0.1μA. 5. Release of Power-down mode After entering power-down mode, when the system is connected to a charger, the charging current will flow through the parasitic diode of M1. If VCSI<VOI2 occurs, then UW01+ will release power-down mode. While keeping charging status, there are two ways back to normal condition: (1) If VCSI<VCH (Charger detection), then when VDD>VODL, M1 will be turned on and system will back to normal condition. (2) If VCH<VCSI<VOI2, the condition VDD>VODR, must be satisfied for M1 to be turned on, and then the system will back to the normal condition. 6. Charger Detection While connecting to a charger after entering into power-down mode, then if VDD<VCH, M1 will be turned on when VDD>VODL. The system will back to normal condition since the charger has been detected. 7. Abnormal Charge Current Condition When a charger is connected to the battery system in normal condition, then if VDD<VOCU and VCSI<VCH occur through a delay time than TOC (delay time of overcharge detection), M2 will be turned off to stop this charging status, which is abnormal charge current condition. Abnormal charge current condition is released when the voltage of CSI pin becomes higher than charger detection voltage (VCH), or the charger is removed. 8. Over Current (or Short Circuit ) Condition 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 (or TOI2), it satisfies the over current (or short circuit) condition. Then M1 will be turned off and CSI will be pulled down to VSS through an internal resistance. It is called the over current (or short circuit) condition. (1) If the over current (or short circuit) is detected and it keeps longer than the overdischarge detection delay time with the same circumstance, the condition will be changed to the power-down mode when the battery voltage falls below the overdischarge detection voltage. (2) If the battery voltage falls below the overdischarge detection voltage (VODL) due to the over current (or short circuit), the discharging control M1 will be turned off when this condition occurs. After overdischarge detection delay time (TOD) expired, if the battery voltage is still equal to or lower than the overdischarge detection voltage, the condition will be changed to power-down mode. www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 6 of 11 QW-R502-321.d UW01+ Preliminary CMOS IC DESCRIPTION OF OPERATION(Cont.) 9. Release of Over Current (or Short Circuit ) Condition While the protection IC remains in the Over current (or Short circuit ) condition, then 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 By forcing DS to VDD, the delay time of the overcharge and overdischarge can be reduced to within 50ms; therefore, testing time of protector circuit board can be reduced. 1.6MΩ pull down resistor is connected between DS pin and VSS internally. DS pin should be open or connected to VSS in the actual application. www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 7 of 11 QW-R502-321.d UW01+ Preliminary TIMING DIAGRAM 1. Overcharge Condition → Load Discharge → Normal Condition CMOS IC Charger Load VOCU VOCR VODR VODL VDD CSI VDD VSS VDD VOI1 VSS VCH TOC www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd TOC 8 of 11 QW-R502-321.d UW01+ Preliminary CMOS IC TIMING DIAGRAM(Cont.) 2. Overdischarge Condition → Charging By a Charger → Normal Condition Charger OC Pin Battery Voltage Load VOCU VOCR VODR VODL VDD CSI OD Pin VDD CSI Pin VSS VDD VOI2 VSS VCH TOD www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd TOD 9 of 11 QW-R502-321.d UW01+ Preliminary TIMING DIAGRAM(Cont.) 3. Overdischarge Condition → Abnormal Charger Current Condition → Normal Condition CMOS IC Charger OC Pin Battery Voltage Load VOCU VOCR VODR VODL VDD CSI OD Pin VDD CSI Pin VSS VDD VOI2 VSS VCH TOD TOC www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 10 of 11 QW-R502-321.d UW01+ Preliminary TIMING DIAGRAM(Cont.) 4. Over Current and Short Circuit Condition → Normal Condition CMOS IC 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. www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 11 of 11 QW-R502-321.d