DW01

DW01 BATTERY PROTECTION IC FOR 1-CELL PACK ■ Features (1) High-accuracy voltage detection circuit ‧Overcharge detection voltage 3.6 to 4.4V Accuracy ±50 mV ‧Overcharge release voltage 3.6 to 4.4V Accuracy ±50 mV ‧Overdischarge detection voltage 2.0 to 3.0 V Accuracy ±100 mV ‧Overdischarge release voltage 2.0 to 3.4V Accuracy ±100 mV ‧Discharge overcurrent detection voltage 0.05 to 0.30 V Accuracy ±30 mV ‧Load short-circuiting detection voltage 0.6V Accuracy ±200 mV (2) Detection delay times are generated by an internal circuit (external capacitors are unnecessary). ‧Overcharge detection delay time Typical 100ms ‧Overdischarge detection delay time Typical 120ms ‧Discharge overcurrent detection delay time Typical 16ms ‧Load short-circuiting detection delay time Typical 750s (3) (4) (5) (6) High voltage tolerance is used for charger connection pins, VM and CO pins are absolute maximum rating＝28V) 0V battery charge function available /unavailable are selectable. Wide operating temperature range -40 to +85℃ Low current consumption  Operation mode Typ. 2.4 A  Standby mode Green-mode Max. 0.1 A 25℃ Self-recovery function Max. 3.0 A 25℃ ■ Applications ‧ Lithium-ion rechargeable battery packs ‧ Lithium polymer rechargeable battery packs Max. 6.0 A （25℃ ） DW01 ■ Block Diagram CO Level shift Divider Oscillator VDD DO VCHA VDET1 Charger Detection Overcharge VDET3 Discharge overcurrent VDET4 Charge overcurrent Control Logic VDET2 Overdischarge VM Short circuiting VSS DW01 ■ Absolute Maximum Rating Item Symbol Rating Unit Supply voltage VDD -0.3~10 V VM termial input voltage VM VDD-28~VDD+0.3 V CO terminal Output voltage VCO VDD-28~VDD+0.3 V DO terminal Output voltage VDO VDD-0.3~VDD+0.3 V Operation temperature Topr -40~+85 ℃ Storage temperature Tstg -55~+125 ℃ DW01 Operation Temperature=25℃ ■ Electrical Characteristics Parameter Operating voltage between VDD & VSS Symbol Conditions Min. Typ. Max. Unit 1.5 — 9.0 V 1.5 — 25.0 V VDD-VM, VDD-VSS=0V — — 1.2 V VDD=3.6,VM=1.0V 30 50 100 K VDD Operating voltage between CO & VM Minimum operating voltage for 0V charging Discharging overcurrent release resistance Vst Rshort CO pin Nch ON voltage VCOL — 0.4 0.5 V CO pin Pch ON voltage VCOH VDD-0.1 VDD-0.02 — V DO pin Nch ON voltage VDOL — 0.2 0.5 V DO pin Pch ON voltage VDOH VDD-0.1 VDD-0.02 — V VDD=3.5V,VM=0V 1.2 2.4 6.0 uA Ist VDD=VM=2.0V — — 0.1 uA IDOX VDD=VM=2.0V — 1.8 3.0 uA Min. Typ. Max. Unit Current consumption Current consumption at stand-by(Green) Overdischarge current consumption (Self-recovery) Parameter IDD Symbol Conditions Overcharge detection voltage Vdet1 R1=100 4.240 4.2800 4.330 V Overcharge release voltage Vrel1 R1=100 4.030 4.080 4.130 V Overcharge hysteresis voltage Vhys1 R1=100 Vhys1=Vdet1-Vrel1 — 0.200 — V Overdischarge detection voltage Vdet2 VM=0V,R1=100 2.300 2.400 2.500 V Overdischarge release voltage Vrel2 R1=100 2.900 3.000 3.100 V Overdischarge release voltage2 Vrel2' 2.300 2.400 2.500 V Discharging overcurrent detection voltage Vdet3 R1=100, R2=1.0k, VM=Vchg VDD=3.0V, R2=1.0k 0.110 0.140 0.170 V Short detection voltage Vshort VDD=3.0V 0.40 0.60 0.80 V Overcharge detection delay time TVdet1 VDD=3.8V→4.5V 50 100 150 ms Overdischarge detection delay time TVdet2 VDD=3.2V→2.2V 60 120 180 ms Discharging overcurrent detection delay time TVdet3 8 16 24 ms Short detection delay time Tshort 350 750 1100 us Charger detection voltage Vchg VDD=3.0V, VM=0V→0.2V VDD=3.5V, VM=0V→1.0V VDD=3.6V, R2=1.0k 0.3 0.7 1.1 V DW01 Application Circuits Discrete Components R1 Resistor R2 Resistor R3 Thermistor C1 Function Min. Typ. Max. Unit Remarks − 100 1K  *1 300 1K 2K  *4 Temp. protection − − − k Capacitor Noise filtering 0.022 0.1 1.0 F M1 N-MOSFET Discharge switch *2 M2 N-MOSFET Charge switch *2 Current limit Noise filtering Current limit *1 ESD protection R1 is a single-stage RC filter the higher resistance of R1 *3 the better the filtering effect If the R1 resistance higher than the recommended value it will affect the internal detection circuit and the voltage detection accuracy will out of specification. We suggest using the recommended resistance in application. *2 The absolute maximum rating of CO and VM is 28V, customer could choose 20V or N-MOSFET switches for different application. *3 Add a C1 capacitor between VDD and VSS could filter conduction and radiation noise. *4 R2 resistor could have a current limit function and limit charger current surge. 30V dual DW01 DW01 Package Outline(Unit:mm)