IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ ( SOT-23-6 ) General Description 1 2 3 Reduction in Board Size due to Miniature Package SOT -23-6. Ultra-Low Quiescent Current at 3 μA (Vcc=3.9V). Ultra-Low Pow er-Dow n Current at 0.1μ A (Vcc=2.0V). Precision Overcharge Protection Voltage 4.3V ± 50mV for the DW01 Plus 0.55 +0.02 0.15 -0.02 +0.01 -0.01 +0.2 -0.1 0-0.1 1.1 +0.1 -0.1 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. Features 0.4 4 +0.2 2.8 -0.1 5 +0.2 1.6 -0.1 6 +0.1 0.68 -0.1 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. Unit: mm +0.1 0.4 -0.1 Ordering Information DW01+ PACKAGE TYPE SOT-23-6 TEMPERATURE RANGE -40°C~+85°C OVERCHARGE PROTECTION 4.3V± 50mV Load Detection Function during Overcharge Mode. Two Detection Levels for Overcurrent Protection. Delay times are generated by internal circuits. No external cap acitors required. A ppl i cat i ons Protection IC for One-Cell Lithium-Ion / Lithium-Poly mer Battery Pack www.kexin.com.cn 1 IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ Product NameList SOT-23-6 Overcharge detection voltage [VOCP] (V) Overcharge release voltage [VOCR] (V) DW01+ 4.300±0.050 4.100±0.050 Package Model DW01 Plus Overdischarge Overdischarge detection release voltage voltage [VODP] (V) [VODR] (V) 2.40±0.100 3.0±0.100 Pin Configuration Pin No. Symbol 6 Description 1 OD MOSFET gate connection pin for discharge control 2 CS Input pin for current sense, charger detect 3 OC MOSFET gate connection pin for charge control 4 TD Test pin for reduce delay time 5 VCC Power supply, through a resistor (R1) 6 GND Ground pin Overcurrent detection voltage [VOI1] (mV) 150±30 5 4 SOT-23-6 TOP VIEW 1 2 3 TD Functional Block Diagram VCC Short circuit Detector VSS Overcharge Detector Over current Detector Overdischarg e Detector Divider Control Logic Charger Detector OD www.kexin.com.cn OC Control Logic VSS VSS CS GND 2 VSS Oscillator Control Circuit VSS IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ Typical Application Circuit BATT+ R1 100 Ω VCC C1 0.1μF DW01 Plus GND OC CS OD TD R2 1kΩ M2 M1 BATT- Absolute Maximum Ratings (VSS=0V, Ta=25° C unless otherwise specified) Item Symbol Rating Unit Input voltage between VDD and VSS * VDD VSS-0.3 to VSS+10 V OC output pin voltage V OC VDD-26 to VDD+0.3 V OD output pin voltage VOD VSS-0.3 to VDD+0.3 V CS input pin voltage VCS VDD-26 to VDD+0.3 V Operating Temperature Range TOP -40 to +85 °C Storage Temperature Range TST -40 to +125 °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. www.kexin.com.cn 3 IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ Eletrical Characteristics (Ta=25° C unless otherwise specified) PARAMETER TEST CONDITIONS SYMBOL Typ Max UNIT 3.0 6.0 μA 0.1 μA Supply Current VCC=3.9V ICC Power-Down Current VCC=2.0V IPD Overcharge Protection Voltage DW01 Plus VOCP 4.25 4.30 4.35 V Overcharge Release Voltage VOCR 4.05 4.10 4.15 V Overdischarge Protection Voltage VODP 2.30 2.40 2.50 V Overdischarge Release Voltage VODR 2.90 3.00 3.10 V Overcurrent Protection Voltage VOIP（VOI1） 120 150 180 mV VSIP（VOI2） 1.25 1.35 1.45 V TOC 80 200 ms Short Current Protection Voltage VCC=3.6V Overcharge Delay Time 4 Min Overdischarge Delay Time VCC=3.6V to 2.0V TOD 20 60 ms Overcurrent Delay Time (1) VCC=3.6V TOI1 10 20 ms Overcurrent Delay Time (2) VCC=3.6V TOI2 5 50 μs -0.7 -0.2 V Charger Detection Threshold Voltage VCH OD Pin Output “H” Voltage VDH OD Pin Output “L” Voltage VDL OC Pin Output “H” Voltage VCH OC Pin Output “L” Voltage VCL www.kexin.com.cn -1.2 VCC-0.1 VCC-0.02 0. 1 V 0.5 VCC-0.1 VCC-0.02 0.1 V V 0.5 V IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ 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 500kΩ. 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 0.1μ A (VCC=2.0V). At the same time, the CS pin is pull-up to VCC through an internal resistor. www.kexin.com.cn 5 IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ Timing Diagram 1. Overcharge Condition Load Discharging Normal Condition Charger Load OC Pin Battery Voltage VOCP VOCR VODR VODP VCC OD Pin CS VCC CS Pin GND VCC VOI1 GND VCH TOC 6 www.kexin.com.cn TOC IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ Overdischarge Condition Charging by a Charger Normal Condition Charger Load OC Pin Battery Voltage VOCP VOCR VODR VODP VCC OD Pin CS VCC GND CS Pin 2. VCC VOI2 GND VCH TOD TOD www.kexin.com.cn 7 IC SMD Type Lithium-ion/Polymer Battery Protection IC DW01+ 3. Over Current Condition Normal Condition Charger Load OC Pin Battery Voltage VOCP VOCR VODR VODP VCC OD Pin CS VCC CS Pin GND VCC VOI2 VOI1 GND TOI1 8 www.kexin.com.cn TOI2