DW01A

DW01A General Description Ordering Information The DW01A 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. DW01A PACKAGE TYPE SOT-23-6 TEMPERATURE RANGE -40°C~+85°C The ultra-small package and less required external components make it ideal to integrate the DW01A 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. OVERCHARGE PROTECTION 4.3V± 50mV Features Applications Reduction in Board Size due to Miniature Package SOT-23-6. Protection IC for One-Cell Lithium-Ion / Lithium-Polymer Battery Pack Ultra-Low Quiescent Current at 3μA (Vcc=3.6V). Overdischarge Current at 4 μA (Vcc=1.8 V). Precision Overcharge Protection Voltage 4.3V ± 50mV Two Detection Levels for Overcurrent Protection. Delay times are generated by internal circuits. No external capacitors required. Rev B - 1- 2016-4-12 DW01A Product Name List Overcharge Overcharge Overdischarge Overdischarge Overcurrent 0V detection battery release detection release detection Product Package voltage charge voltage voltage voltage voltage [VOCP] (V) [VOCR] (V) [VODP] (V) [VODR] (V) [VOI1] (mV) function DW01A SOT-23-6 4.300±0.050 4.100±0.050 2.90 ±0.1 2.50±0.1 150±20 available Stand by function release Auto Recovery Pin Configuration Pin No. Symbol Description 6 1 OD MOSFET gate connection pin for discharge control 2 VM 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 5 4 SOT-23-6 TOP VIEW 1 2 3 TD Functional Block Diagram VCC Short circuit Detector VSS Overcharge Detector Over current Detector VSS Divider Control Logic Overdischarg e Detector VM Charger Detector GND VSS Control Logic OC OD VSS Rev B VSS Oscillator Control Circuit - 1 -2 2016-4-12 DW01A Typical Application Circuit BATT+ R1 100Ω VCC C1 0.1μF DW01A GND OC VM OD TD R2 1kΩ M1 M2 BATT- Absolute Maximum Ratings (VSS=0V, Ta=25°C unless otherwise specified) Item Symbol Rating Input voltage between VDD and VSS VDD OC output pin voltage VOC VDD-24 to VDD+0.3 V OD output pin voltage VOD VSS-0.3 to VDD+0.3 V CS input pin voltage VCS VDD-24 to VDD+0.3 V Operating Temperature Range TOP -40 to +85 °C Storage Temperature Range TST -40 to +125 °C Rev B - 3- 0.3 to 10 Unit V 2016-4-12 DW01A Electrical Characteristics (Ta=25°C unless otherwise specified) PARAMETER TEST CONDITIONS SYMBOL Supply Current VCC=3.6V ICC Power-Down Current VCC=1.8V IPD Typ Max UNIT 3.0 6.0 μA 4 μA 0V Battery Charge Starting Charger Voltage V0CHA 1.2 Overcharge Protection Voltage VOC 4.25 4.30 4.35 V Overcharge Release Voltage VOCR 4.05 4.10 4.15 V Overdischarge Protection Voltage VOD 2.40 2.50 2.60 V Overdischarge Release Voltage VODR 2.80 2.90 3.00 V Overcurrent Protection Voltage VEDI 130 150 170 mV Short Current Protection Voltage Vshort 0.82 1.36 1.75 V TOC 110 200 ms TOD 55 200 ms Overcurrent Delay Time (1) T EDI 7 20 ms Overcurrent Delay Time (2) T short 400 600 μs Overcharge Delay Time Overdischarge Delay Time Rev B Min VCC=3.6V to 2.4V OD Pin Output “H” Voltage VCC=3.9V ICO =10uA DoutH OD Pin Output “L” Voltage VCC=2V IDO =10uA DoutL OC Pin Output “H” Voltage VCC=3.9V ICO =10uA CoutH - 4- V VCC-0.4 VCC-0.2 0. 2 VCC-0.1 VCC-0 02 V 0.5 V V 2016-4-12 DW01A Timing Diagram 1. Overcharge Condition Load Discharging Normal Condition Charger Load Battery Voltage VOC VOCR VODR VOD OC Pin VCC VM OD Pin VCC GND VM Pin VCC VEDI GND VOCH TOC Rev B TOC - 5- 2016-4-12 DW01A 2. Overdischarge Condition Charging by a Charger Normal Condition Charger Load Battery Voltage VOC VOCR VODR VOD OC Pin VCC VM OD Pin VCC GND VM Pin VCC Vshort GND VOCH TOD Rev B TOD - 6- 2016-4-12 DW01A 3. Over Current Condition Normal Condition Charger Load Battery Voltage VOC VOCR VODR VOD OC Pin VCC VM OD Pin VCC GND VM Pin VCC Vshort VEDI GND T EDI Rev B T short - 7- 2016-4-12