DW01A
General Description Ordering Information
The DW01A battery protection IC is designed to DW01A
protect lithium-ion/polymer battery from damage or PACKAGE TYPE
degrading the lifetime due to overcharge, SOT-23-6
overdischarge, and/or overcurrent for one-cell
lithium-ion/polymer battery powered systems, such as TEMPERATURE RANGE
cellular phones. -40°C~+85°C
The ultra-small package and less required external OVERCHARGE PROTECTION
components make it ideal to integrate the DW01A 4.3V± 50mV
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 Applications
Reduction in Board Size due to Miniature Protection IC for One-Cell Lithium-Ion /
Package SOT-23-6. 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.
Shenzhen H&M Semiconductor Co.Ltd
http.//www.hmsemi.com
DW01A
Product Name List
Overcharge Overcharge Overdischarge Overdischarge Overcurrent 0V Stand by
detection release detection release detection battery function
Product Package
voltage voltage voltage voltage voltage charge release
[VOCP] (V) [VOCR] (V) [VODP] (V) [VODR] (V) [VOI1] (mV) function
Auto
DW01A SOT-23-6 4.300±0.050 4.100±0.050 2.40±0.100 3.0±0.100 150±30 available Recovery
Pin Configuration
Pin No. Symbol Description 6 5 4
1 OD MOSFET gate connection pin for discharge control SOT-23-6
TOP VIEW
2 CS Input pin for current sense, charger detect
3 OC MOSFET gate connection pin for charge control 1 2 3
4 TD Test pin for reduce delay time
5 VCC Power supply, through a resistor (R1)
6 GND Ground pin
Functional Block Diagram
TD
VCC
Short circuit
Detector
VSS VSS
Oscillator
Control
Overcharge Circuit
Detector
Over current
Detector
VSS
Divider
CS
Overdischarg Control
e Detector Logic
GND Charger
Detector
VSS
VSS Control
Logic
OD
OC
Shenzhen H&M Semiconductor Co.Ltd
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DW01A
Typical Application Circuit
BATT+
R1
100Ω
VCC
C1
0.1μF DW01A
GND
CS
TD
OD
OC
R2
1kΩ
M1 M2
BATT-
Absolute Maximum Ratings
(VSS=0V, Ta=25°C unless otherwise specified)
Item Symbol Rating Unit
Input voltage between VDD and VSS VDD 0.3 to 10 V
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
Shenzhen H&M Semiconductor Co.Ltd
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DW01A
Electrical Characteristics
(Ta=25°C unless otherwise specified)
PARAMETER TEST CONDITIONS SYMBOL Min Typ Max UNIT
Supply Current VCC=3.6V ICC 3.0 6.0 μA
Power-Down Current VCC=1.8V IPD 4 μA
0V Battery Charge Starting Charger
V0CHA 1.2 V
Voltage
Overcharge Protection Voltage 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
Short Current Protection Voltage VCC=3.0V VSIP（VOI2） 1.0 1.2 1.4 V
Overcharge Delay Time TOC 80 200 ms
Overdischarge Delay Time VCC=3.2V to 2.0V TOD 40 200 ms
Overcurrent Delay Time (1) VCC=3.0V TOI1 10 20 ms
Overcurrent Delay Time (2) VCC=3.5V TOI2 5 50 μs
Charger Detection Threshold Voltage VCH -1.2 -0.7 -0.2 V
OD Pin Output “H” Voltage VDH VCC-0.1 VCC-0.02 V
OD Pin Output “L” Voltage VDL 0. 1 0.5 V
OC Pin Output “H” Voltage VCH VCC-0.1 VCC-0.02 V
OC Pin Output “L” Voltage VCL 0.1 0.5 V
Shenzhen H&M Semiconductor Co.Ltd
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DW01A
Timing Diagram
1. Overcharge Condition Load Discharging Normal Condition
Charger
Load
VOCP
Battery Voltage
VOCR
VODR
VODP
VCC
OC Pin
CS
VCC
OD Pin
GND
VCC
CS Pin
VOI1
GND
VCH
TOC TOC
Shenzhen H&M Semiconductor Co.Ltd
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DW01A
2. Overdischarge Condition Charging by a Charger Normal Condition
Charger
Load
VOCP
Battery Voltage
VOCR
VODR
VODP
VCC
OC Pin
CS
VCC
OD Pin
GND
VCC
VOI2
CS Pin
GND
VCH
TOD TOD
Shenzhen H&M Semiconductor Co.Ltd
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DW01A
3. Over Current Condition Normal Condition
Charger
Load
VOCP
Battery Voltage
VOCR
VODR
VODP
VCC
OC Pin
CS
VCC
OD Pin
GND
VCC
VOI2
CS Pin
VOI1
GND
TOI1
TOI2
Shenzhen H&M Semiconductor Co.Ltd
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