DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Description
The DW01A has built-in a high precision voltage detection circuit and delay circuit, by detecting the battery
voltage、current, realize the battery overcharge, overdischarge, overcurrent protection and so on. Suitable for single
section lithium-ion/lithium-polymer rechargeable battery protection circuit.
Features
⚫ High precision voltage detection function:
1. Overcharge Protection Voltage 4.28V Accuracy: ±50mV
2. Overcharge Release Voltage 4.08V Accuracy: ±50mV
3. Overdischarge Protection Voltage 2.40V Accuracy: ±100mV
4. Overdischarge Release Voltage 3.00V Accuracy: ±100mV
⚫ Discharge overcurrent detection function
1. Overcurrent Protection Voltage 160mV Accuracy: ±20mV
2. Short Current Protection Voltage 1.00V Accuracy: ±300mV
⚫ Protection Delay Time
1. Overcharge Delay Time 80ms(Typ.)
2. Overdischarge Delay Time 40ms(Typ.)
3. Discharge overcurrent delay time 10ms(Typ.)
4. Charge overcurrent delay time 10ms(Typ.)
5. Load short circuit delay time 300µs(Typ.)
⚫ Charge overcurrent detection voltage -0.150V
⚫ Load detection function
⚫ Allow to charge 0V battery function
⚫ Low power consumption current
1. Operating state 1.5µA(Typ.), at TA=25°C
2. Overdischarge state 0.7µA(Typ.), at TA=25°C
⚫ The recommended capacity of lithium-ion batteries is 1000mA/h or less
⚫ Operating temperature range：- 40℃~+85℃
⚫ Available in SOT-23-6 Package
Applications
⚫ Protection IC for One-Cell Lithium-Ion /Lithium-Polymer Battery Pack
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Revision：3.0 Jun-2023
DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Typical Application Circuit
P+
R1
470Ω
B+ VCC
C1
B-
0.1μF
DW01A
GND
OD OC CS
R2
2KΩ
P-
Symbol Typ. Rating Unit
R1 470 470 ~ 1500 Ω
R2 2 1~3 kΩ
C1 0.1 ≥ 0.1 μF
Note：
1. R1, R2 cannot be omitted, and R1 must be greater than or equal to 470 ohms.
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Revision：3.0 Jun-2023
DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Pin Distribution
SOT-23-6
6.GND 5.VCC 4.NC
1.OD 2.CS 3.OC
Functional Pin Description
Pin NO. Symbol Pin 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 NC Not Connected
5 VCC Power supply, through a resistor (R1)
6 GND Ground pin
Ordering Information
Orderable Reel Package Qty
Package Eco Plan Note MSL Level Marking Code
Device (inch) (PCS)
DW01A SOT-23-6 7 3000 RoHS & Green MSL3 ':$
Note:
RoHS：PJ defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances,
including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials.
Green：PJ defines "Green" to mean Halogen-Free and Antimony-Free.
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Revision：3.0 Jun-2023
DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Block Diagram
- -
Overcurrent comparator Short-Circuit comparator charge/Load Detection
Short-Circuit Detection
+ +
Overcurrent Detection
CS
Overcharge/Overdischarge
VCC
+
Overcharge comparator
Overcharge
Detector -
Control
Logic
Overdischarge
Detector -
Overdischarge comparator
+
GND Delay Circuit
OD OC
Product Name List
Overcharge Overcharge Overdischarge Overdischarge
Parameter Overdischarge Short Charging Overcharge Overdischarge
Protect Release Protect release
Current Circuit Overcurrent Lock Lock
Voltage Voltage Voltage voltage
Model
VOCP VOCR VODP VODR VEC1 VSHORT VCHA -- --
DW01A 4.280V 4.080V 2.400V 3.000V 0.160V 1.000V -0.15V Y N
Absolute Maximum Ratings
(TA=25℃ , unless otherwise noted.)
Parameter Symbol Rating Unit
Power voltage VCC -0.3 ~ 6 V
CS input pin voltage VCS VCC-15 to VCC+0.3 V
Operating Temperature Range TOPR -40 ~ 85 °C
Storage Temperature Range TSTG -55 ~ 125 °C
Note: When the voltage exceeds the absolute maximum rating, the chip may be irreparable damage.
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Revision：3.0 Jun-2023
DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Electrical Characteristics
(TA=25℃ , unless otherwise noted.)
Parameter Symbol Test Conditions Min. Typ. Max. Unit
Operating Voltage VCC 1.0 -- 5.5 V
Supply Current IVCC VCC=3.5V -- 1.5 5.0 µA
Power-Down Current IOPED VCC =1.5V -- 0.7 1.5 µA
Protection Voltage VOC VCC =3.5→4.5V 4.230 4.280 4.330 V
Overcharge Release Voltage VOCR VCC =4.5→3.5V 4.030 4.080 4.130 V
Protection Delay Time TOC VCC =3.5→4.5V -- 80 160 mS
Protection Voltage VOD VC5=3.5→2.0V 2.300 2.400 2.500 V
Overdischarge Release Voltage VODR VCC =2.0→3.5V 2.900 3.000 3.100 V
Protection Delay Time TOD VCC =3.5→2.0V -- 40 80 mS
Discharge Protection Voltage VEC VM-VSS=0→0.20V 0.140 0.160 0.180 V
Overcurrent Protection Delay Time TEC VM-VSS=0→0.20V -- 10 20 mS
Charge Protection Voltage VCHA VSS-VM=0→0.30V -0.180 -0.150 -0.120 V
Overcurrent Protection Delay Time TCHA VSS-VM=0→0.30V -- 10 20 mS
Protection Voltage VSHORT VM -VSS=0→1.5V 0.700 1.000 1.300 V
Short-Circuit
Protection Delay Time TSHORT VM -VSS=0→1.5V -- 300 600 µS
Charger Starting Voltage
V0VCH Allow charging to 0V battery 1.2 -- -- V
(Allow Charging to 0V Battery)
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DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Description of Operation
1. Overcharge Protection
When the battery voltage rises above VOC and lasts for a period of time TOC, the output of OC terminal will be
reversed and the charging control MOSFET will be turned off to stop charging, which is called the overcharge state.When
the battery voltage drops below the VOCR of overcharge release voltage and lasts for a period of timeTOCR, It will remove
the overcharge state and return to normal state.
there are two ways to remove the overcharge state and return to the normal state:
1.1 Disconnect the charger, do not connect the load and VCHA<VCS<VEC. When the battery voltage drops below the
VOCR of overcharge release voltage, the overcharge state will be released
1.2 Disconnect the charger and connect the load, if VCS>VEC. At this time, only VCC<VOC is required, and the
overcharge state will be released. This function is called load detection function.attention, after detecting overcharge, if the
charger is always connected, then even if the cell voltage drops to below VOCR , overcharging state can not be released.
through disconnect the charger and VCS> VCHA to remove the overcharge and discharge state.
2. Overdischarge Protection
When the battery voltage drops below VOD and lasts for a period of timeTOD, the output of OD terminal will be
reversed and the discharging control MOSFET will be turned off to stop discharging, which is called the overdischarge
state.When the battery voltage rises above the VODR of overcharge release voltage and lasts for a period of timeTODR, It
will remove the overdischarge state and return to normal state.
There are three ways to release the over-discharge state:
2.1 Connect the charger, if the CS terminal voltage is lower than the charger detection voltage (VCH), when the
battery voltage is higher than the overdischarge detection voltage (VOD), the overdischarge state will be released and the
charger will return to normal operating state. This function is called the charger detection function.
2.2 Connect the charger. If the CS terminal voltage is higher than the charger detection voltage (VCH), when the
battery voltage is higher than the overdischarge discharge voltage (VODR), the overdischarge state will be released and
return to normal operating state.
2.3 When disconnect the charger, if the battery voltage restores to higher than the over-discharge discharge voltage
(VODR), the over-discharge state is released and the battery returns to normal operating state., that is, the over-discharge
self-recovery function is available.
3. Discharge Overcurrent State
In Voltage of the battery are in a state of discharge, VCS increases with the increase of discharge current, when the
voltage of the CS is higher than the VEC and lasted for a period of time(TEC) , The chip is thought to have a discharge
overcurrent; when the voltage of the CS is higher than the VSHORT and lasted for a period of time(TSHORT), The chip is
thought to short circuit . The above two kinds of any state, OD terminal output will be reversed, the discharge control
MOSFET will be turned off to stop discharging
As long as the load equivalent resistance be increased or disconnect the load, make the VCS < VEC, can remove
discharge overdischarge state, returned to normal state.
4. Charge Overcurrent Detection
Under normal operating state of the battery, in the process of charging, if CS terminal voltage is lower than charging
overcurrent detection voltage (VCHA), and the state duration is over the delay time of charge overcurrent detection(TCHA),
then close the charging control MOSFET, stop charging, the state is called charge overcurrent state. After charging into the
overcurrent detection state, if broken charger to CS terminal voltage higher than over-current detection voltage (VCHA),
charge overcurrent state was lifted, return to normal operating condition.
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DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
5. Allow to charge 0V battery function
This function is used to have self-discharge to 0V of rechargeable batteries. When the charger voltage connected to
the positive (P+) and negative (P-) between the battery higher than the 0V battery charger starting voltage(V0VCH) , The
gate of charging control MOSFET is the potential of VDD, Due to the charger voltage make the voltage between gate and
the source of MOSFET higher than threshold voltage, the charge control MOSFET be turn on (OC terminal open), start
charging. at this time, the discharge control MOSFET is still shut off, the charging current through its internal parasitic
diodes. When the battery voltage is higher than the discharge detection voltage (VOD), IC into the normal operating
condition.
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Revision：3.0 Jun-2023
DW01A
One Cell Lithium-ion/Polymer Battery Protection IC
Package Outline
SOT-23-6
Dimensions in mm
±0.1
2.92
1.9±0.1
0.127 +0.05/-0.02
10
±0.1
±0.1
2.8
1.6
12
R0.15MAX
0.95±0.1 0.35±0.05
R0.15MAX
10
±0.1
1.1
0.65
±0.1
12
± 0.05
0.06
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