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| DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC General Description The DW01 Plus battery protection IC is designed to protect lithium-ion/polymer battery from damage or degrading the lifetime due to overcharge, overdischarge, and/or overcurrent for one-cell lithium-ion/polymer battery powered systems, such as cellular phones. The ultra-small package and less required external components make it ideal to integrate the DW01 Plus into the limited space of battery pack. The accurate 50mV overcharging detection voltage ensures safe and full utilization charging. The very low standby current drains little current from the cell while in storage. Ordering Information DW01+ PACKAGE TYPE SOT-23-6 TEMPERATURE RANGE -40C~+85C OVERCHARGE PROTECTION 4.3V 50mV Features Reduction in Board Size due to Miniature Package SOT-23-6. Ultra-Low Quiescent Current at 3A (Vcc=3.9V). Ultra-Low Power-Down Current at 0.1A (Vcc=2.0V). Precision Overcharge Protection Voltage 4.3V 50mV for the DW01 Plus Load Detection Function during Overcharge Mode. Two Detection Levels for Overcurrent Protection. Delay times are generated by internal circuits. No external capacitors required. Applications Protection IC for One-Cell Lithium-Ion / Lithium-Polymer Battery Pack Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 1/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Product Name List Package Model SOT-23-6 DW01 Plus DW01 Overcharge detection voltage [VOCP] (V) 4.3000.050 Overcharge release voltage [VOCR] (V) 4.1000.050 Overdischarge Overdischarge detection release voltage voltage [VODP] (V) [VODR] (V) 2.400.100 3.00.100 Overcurrent detection voltage [VOI1] (mV) 15030 Pin Configuration 6 5 4 Pin No. Symbol 1 2 3 4 5 6 OD CS OC TD VCC GND Description MOSFET gate connection pin for discharge control Input pin for current sense, charger detect MOSFET gate connection pin for charge control Test pin for reduce delay time Power supply, through a resistor (R1) Ground pin 1 SOT-23-6 TOP VIEW 2 3 Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 2/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Functional Block Diagram VCC TD VSS Short circuit Detector Oscillator Control Circuit Over current Detector Divider Control Logic Charger Detector VSS Overcharge Detector VSS CS Overdischarg e Detector GND VSS VSS Control Logic OD Typical Application Circuit BATT+ R1 100 VCC C1 0.1F GND TD DW01 Plus CS OD OC M1 M2 OC R2 1k BATT- Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 3/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Absolute Maximum Ratings (VSS=0V, Ta=25C unless otherwise specified) Item Input voltage between VDD and VSS * OC output pin voltage OD output pin voltage CS input pin voltage Operating Temperature Range Storage Temperature Range Symbol VDD VOC VOD VCS TOP TST Rating VSS-0.3 to VSS+10 VDD-26 to VDD+0.3 VSS-0.3 to VDD+0.3 VDD-26 to VDD+0.3 -40 to +85 -40 to +125 Unit V V V V C C Note: DW01 Plus contains a circuit that will protect it from static discharge; but please take special care that no excessive static electricity or voltage which exceeds the limit of the protection circuit will be applied to it. Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 4/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Electrical Characteristics (Ta=25C unless otherwise specified) PARAMETER Supply Current Power-Down Current Overcharge Protection Voltage Overcharge Release Voltage Overdischarge Protection Voltage Overdischarge Release Voltage Overcurrent Protection Voltage Short Current Protection Voltage Overcharge Delay Time Overdischarge Delay Time Overcurrent Delay Time (1) Overcurrent Delay Time (2) Charger Detection Threshold Voltage OD Pin Output "H" Voltage OD Pin Output "L" Voltage OC Pin Output "H" Voltage OC Pin Output "L" Voltage VCC=3.6V to 2.0V VCC=3.6V VCC=3.6V VCC=3.6V TEST CONDITIONS SYMBOL VCC=3.9V VCC=2.0V DW01 Plus ICC IPD VOCP VOCR VODP VODR VOIP VOI1 VSIP VOI2 TOC TOD TOI1 TOI2 VCH VDH VDL VCH VCL -1.2 4.25 4.05 2.30 2.90 120 1.25 4.30 4.10 2.40 3.00 150 1.35 80 20 10 5 -0.7 Min Typ 3.0 Max 6.0 0.1 4.35 4.15 2.50 3.10 180 1.45 200 60 20 50 -0.2 UNIT A A V V V V mV V ms ms ms s V V VCC-0.1 VCC-0.02 0. 1 VCC-0.1 VCC-0.02 0.1 0.5 0.5 V V V Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 5/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Description of Operation 1. Overcharge Protection When the voltage of the battery cell exceeds the overcharge protection voltage (VOCP) beyond the overcharge delay time (TOC) period, charging is inhibited by turning off of the charge control MOSFET. The overcharge condition is released in two cases: 1) The voltage of the battery cell becomes lower than the overcharge release voltage (VOCR) through self-discharge. 2) The voltage of the battery cell falls below the overcharge protection voltage (VOCP) and a load is connected. When the battery voltage is above VOCP, the overcharge condition will not release even a load is connected to the pack. 2. Overdischarge Protection When the voltage of the battery cell goes below the overdischarge protection voltage (VODP) beyond the overdischarge delay time (TOD) period, discharging is inhibited by turning off the discharge control MOSFET. The default of overdischarge delay time is 10ms. Inhibition of discharging is immediately released when the voltage of the battery cell becomes higher than overdischarge release voltage (VODR) through charging. 3. Overcurrent Protection In normal mode, the DW01 Plus continuously monitors the discharge current by sensing the voltage of CS pin. If the voltage of CS pin exceeds the overcurrent protection voltage (VOIP) beyond the overcurrent delay time (TOI1) period, the overcurrent protection circuit operates and discharging is inhibited by turning off the discharge control MOSFET. The overcurrent condition returns to the normal mode when the load is released or the impedance between BATT+ and BATT- is larger than 500k. The DW01 Plus provides two overcurrent detection levels (0.15V and 1.35V) with two overcurrent delay time (TOI1 and TOI2) corresponding to each overcurrent detection level. 4. Charge Detection after Overdischarge When overdischarge occurs, the discharge control MOSFET turns off and discharging is inhibited. However, charging is still permitted through the parasitic diode of MOSFET. Once the charger is connected to the battery pack, the DW01 Plus immediately turns on all the timing generation and detection circuitry. Charging progress is sensed if the voltage between CS and GND is below charge detection threshold voltage (VCH). 5. Power-Down after Overdischarge When overdischarge occurs, the DW01 Plus will enter into power-down mode, turning off all the timing generation and detection circuitry to reduce the quiescent current to 0.1A (VCC=2.0V). At the same time, the CS pin is pull-up to VCC through an internal resistor. Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 6/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Design Guide 1. Selection of External Control MOSFET Because the overcurrent protection voltage is preset, the threshold current for overcurrent detection is determined by the turn-on resistance of the charge and discharge control MOSFETs. The turn-on resistance of the external control MOSFETs can be determined by the equation: RON=VOIP/ (2 x IT) (IT is the overcurrent threshold current). For example, if the overcurrent threshold current IT is designed to be 3A, the turn-on resistance of the external control MOSFET must be 25m. Be aware that turn-on resistance of the MOSFET changes with temperature variation due to heat dissipation. It changes with the voltage between gate and source as well. (Turn-on resistance of MOSFET increases as the voltage between gate and source decreases). As the turn-on resistance of the external MOSFET changes, the design of the overcurrent threshold current changes accordingly. 2. Suppressing the Ripple and Disturbance from Charger To suppress the ripple and disturbance from charger, connecting R1 and C1 to VCC is recommended. 3. Protection the CS pin R2 is used for latch-up protection when charger is connected under overdischarge condition and overstress protection at reverse connecting of a charger. Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 7/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Timing Diagram 1. Overcharge Condition Load Discharging Normal Condition Charger Load VOCP Battery Voltage OC Pin VOCR VODR VODP VCC CS VCC OD Pin GND VCC CS Pin VOI1 GND VCH TOC TOC Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 8/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC 2. Overdischarge Condition Charging by a Charger Normal Condition Charger Load VOCP Battery Voltage OC Pin VOCR VODR VODP VCC CS VCC OD Pin GND CS Pin VCC VOI2 GND VCH TOD TOD Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 9/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC 3. Over Current Condition Normal Condition Charger Load VOCP Battery Voltage OC Pin VOCR VODR VODP VCC CS VCC OD Pin GND CS Pin VCC VOI2 VOI1 GND TOI1 TOI2 Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 10/11 TD-0405001 Rev. 1.0 DW01 Plus One Cell Lithium-ion/Polymer Battery Protection IC Package Outline D e1 b DETAIL A SYMBOL A A1 A2 b MIN. 1.05 0.05 1.00 0.40 0.25 0.08 2.70 2.60 1.50 0.35 1.10 2.90 2.80 1.60 0.45 0.60 REF. 0.95 BSC. 0 3 6 1.90 BSC. 5 5 8 10 7 10 Unit : mm TYP. MAX. 1.35 0.15 1.20 0.55 0.40 0.20 3.00 3.00 1.70 0.55 E1 E b2 c D E E1 L e c b2 L1 e e1 1 1 2 A2 A GAUGE PLANE A1 L 2 L1 SEATING PLANE DETAIL A Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 11/11 TD-0405001 Rev. 1.0 |
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