A4002E5VR [AITSEMI]
BATTERY MANAGEMENT;
| 型号： | A4002E5VR |
| 厂家： | 
AiT Semiconductor |
| 描述： | BATTERY MANAGEMENT |
| 文件： | 总12页 (文件大小：550K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
DESCRIPTION
FEATURES
The A4002 series product is a high integration
solution for lithium-ion/polymer battery protection.
A4002 contains advanced power MOSFET,
high-accuracy voltage detection circuits and delay
circuits. A4002 is put into a small package and only
one external component makes it an ideal solution
in limited space of battery pack. A4002 has all the
protection functions required in the battery
Protection of Battery Cell Reverse Connection
Integrate MOSFET
Over-temperature Protection
Two-step Overcurrent Detection:
Over-discharge Current
Load Short Circuiting
Charger Detection Function
0V Battery Charging Function
High-accuracy Voltage Detection
Low Current Consumption
Operation Mode: 4uA typ
application
including
overcharging,
over-discharging, overcurrent and load short
circuiting protection etc. The accurate safe and full
utilization charging. The low standby current drains
little current from the cell while in storage. The
device is only targeted for digital cellular phones,
but also for any other Li-ion and Li-Poly
battery-powered information appliance requiring
long-term battery life.
Power-down Mode: 2.0uA typ
Available in SOT-23S and SOT-25 Packages
APPLICATION
The A4002 is available in SOT-23S and SOT-25
packages.
One-Cell Lithium-ion Battery Pack
Lithium-Polymer Battery Pack
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
A4002E3SR
SOT-23S
E3S
E5
SPQ: 3,000pcs/Reel
A4002E3SVR
A4002E5R
SOT-25
SPQ: 3,000pcs/Reel
A4002E5VR
V: Halogen free Package
R: Tape & Reel
Note
AiT provides all RoHS products
REV1.0
- JUN 2018 RELEASED -
- 1 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
PIN DESCRIPTION
Top View
Pin #
Top View
Function
Symbol
SOT-23S
SOT-25
1
2
3
-
4,5
3
VM
VDD
GND
VT
Detection pin
Power supply
Ground.
2
1
Test pin
REV1.0
- JUN 2018 RELEASED -
- 2 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
ABSOLUTE MAXIMUM RATINGS
TA= 25℃, unless otherwise noted
V
-0.3V~6V
-6V~8V
DD, Supply Voltage
VM, Input Pin Voltage
T
150°C
J, Operation Junction Temperature
T
-55°C ~+125°C
STG, Storage Temperature Range
T
-40°C ~+80°C
OPR, Operation Temperature
Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and
operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
THERMAL DATA
Parameter
Symbol
RθJA
Conditions
SOT-23S
Min.
Typ.
Max.
500
200
0.2
Unit
°C/W
°C/W
W
-
-
-
-
-
-
-
-
Thermal Resistance-Junction to Ambient
SOT-25
SOT-23S
SOT-25
PD
Power Dissipation
0.3
W
REV1.0
- JUN 2018 RELEASED -
- 3 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
ELECTRICAL CHARACTERISTICS
TA = 25℃, unless otherwise noted.
Parameter
Symbol
Conditions
Min.
Typ. Max. Unit
Detection Voltage
VCU
VCL
Overcharge Detection Voltage
Overcharge Release Voltage
Overdischarge Detection Voltage
Overdischarge Release Voltage
Charger Detection Voltage
Detection Current
4.25
4.0
2.3
2.9
-
4.3
4.1
4.35
4.2
2.5
3.1
-
V
V
V
V
V
VDL
2.4
VDU
VCHA
3.0
-0.12
Overdischarge Current Detection
Load Short-Circuiting Detection
VDD=3.6V
VDD=3.6V
IIOV
2.1
8
3
3.9
16
A
A
ISHORT
12
Current Consumption
Current Consumption in Normal Operation
VDD=3.6V,
VM=0V
IOPE
IPDN
-
-
4
2
6
uA
uA
VDD=2.0V
Current Consumption in Power Down
3.5
VM pin floating
VM Internal Resistance
Internal Resistance Between VM and VDD
VDD=3.5V,
VM=1.0V
VDD=2.0V,
VM=1.0V
*RVMD
*RVMS
-
-
320
100
-
-
kΩ
kΩ
Internal Resistance Between VM and GND
FET on Resistance
VDD=3.6V
IVM=1.0A
*RSS(ON)
Equivalent FET on Resistance
35
45
55
mΩ
Over Temperature Protection
Over Temperature Protection
*TSHD+
*TSHD-
-
-
120
100
-
-
℃
℃
Over Temperature Recovery Degree
Detection Delay Time
Overcharge Voltage Detection Delay Time
tCU
tDL
-
-
-
-
150
80
200
120
20
ms
ms
ms
us
Overdischarge Voltage Detection Delay Time
Overdischarge Current Detection Delay Time
*tIOV
10
Load Short-Circuiting Detection Delay Time
*tSHORT
150
200
NOTE1: * The parameter is guaranteed by design
REV1.0
- JUN 2018 RELEASED -
- 4 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
DETAILED INFORMATION
Functional Description
The A4002 the voltage and current of a battery and protects it from being damaged due to overcharge voltage,
overdischarge voltage, overdischarge current, and short circuit conditions by disconnecting the battery from
the load or charger. These functions are required in order to operate the battery cell within specified limits.
The device requires only one external capacitor. The MOSFET is integrated and its RSS(ON)is as low as 45mΩ
typical
Normal operating mode
If no exception condition is detected, charging and discharging can be carried out freely. This condition is
called the normal operating mode.
Overcharge Condition
When the battery voltage becomes higher than the overcharge detection voltage (VCU) during charging under
normal condition and the state continues for the overcharge detection delay time (tCU) or longer, the A4002
turns the charging control FET off to stop charging. This condition is called the overcharge condition. The
overcharge condition is released in the following two cases:
1.
When the battery voltage drops below the overcharge release voltage (VCL), the A4002 turns the
charging control FET on and returns to the normal condition.
2.
When a load is connected and discharging starts, the A4002 turns the charging control FET on and
returns to the normal condition. The release mechanism is as follows: the discharging current flows
through an internal parasitic diode of the charging FET immediately after a load is connected and
discharging starts, and the VM pin voltage increases about 0.7V(forward voltage of the diode) from the
GND pin voltage momentarily the A4002 detects this voltage and releases the overcharge condition.
Consequently, in the case that the battery voltage is equal to or lower than the overcharge detection
voltage (VCU), the A4002 returns to the normal condition immediately, but in the case the battery voltage
is higher than the overcharge detection voltage (VCU), the chip does not return to the normal condition
until the battery voltage drops below the overcharge detection voltage (VCU) even if the load is
connected. In addition. If the VM pin voltage is equal to or lower than the overcurrent 1 detection voltage
when a load is connected and discharging starts, load is connected and discharging starts, the chip
does not return to the normal condition
Remark If the battery is charged to a voltage higher than the overcharge detection voltage (VCU) and the
battery voltage does not drop below the overcharge detection voltage (VCU) even when a heavy load,
which causes an overcurrent, is connected, the overcurrent 1 and overcurrent 2 do not work until the
battery voltage drops below the overcharge detection voltage (VCU). Since an actual battery has,
REV1.0
- JUN 2018 RELEASED -
- 5 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
however, an internal impedance of several dozens of mΩ, and the battery voltage drops immediately
after a heavy load which causes an overcurrent is connected, the overcurrent 1 and overcurrent 2
work. Detection of load short-circuiting works regardless of the battery voltage.
Overdischarge Condition
When the battery voltage drops below the overdischarge detection voltage (VDL) during discharging under
normal condition and it continues for the overdischarge detection delay time (tDL) or longer, the A4002 turns
the discharging condition. After the dischargingcontrol FET is turned off, the VM pin is pulled up by the RVMD
resistor between VM and VDD in A4002. meanwhile when VM is bigger than 1.5V (typ.) (the load
short-circuiting detection voltage), the current of the chip reduced to the power-down current (IPDN). This
condition is called power-down condition. The VM and VDD pins are shorted by the RVMD resistor in the IC
under the overdischarge and power-down conditions. The power-down condition is released when a charger
is connected and the potential difference between VM and VDD becomes 1.3V (typ.) or higher (load
short-circuiting detection voltage). At this time, the FET is still off. When the battery voltage becomes the
overdischarge detection voltage (VDL) or higher (see note), the A4002 turns the FET on and changes to the
normal condition from the overdischarge condition.
Remark If the VM pin voltage is no less than the charger detection voltage (VCHA), the battery under
overdischarge condition is connected to a charger, the overdischarge condition is released(the
discharging control FET is turned on) as usual, provided that the battery voltage reaches the
overdischarge release voltage (VDU) or higher.
Overcurrent Condition
When the discharging current becomes equal to or higher than a specified value (the VM pin voltage is equal
to or higher than the overcurrent detection voltage) during discharging under normal condition and the state
continues for the overcurrent detection delay time or longer, the A4002 turns off the discharging control FET
to stop discharging. This condition is called overcurrent condition. (The overcurrent includes overcurrent or
load short-circuiting). The VM and GND pins are shorted internally by the RVMS resistor under the overcurrent
condition. When a load is connected, the VM pin voltage equals the VDD voltage due to the load. The
overcurrent condition returns to the normal condition when the load is released and the impedance between
the B+ and B-pins becomes higher than the automatic recoverable impedance. When the load is removed,
the VM pin goes back to the GND potential since the VM pin potential is lower than the overcurrent detection
voltage (VIOV1),the IC returns to the normal condition.
Abnormal Charge Current Detection
If the VM pin voltage drops below the charger detection voltage (VCHA) during charging under the normal
condition and it continues for the overcharge detection delay time (tCU) or longer, the A4002 turns the charging
control FET off and stops charging. This action is called abnormal charge current detection. Abnormal charge
current detection works when the discharging control FET is on and the VM pin voltage droops below the
REV1.0
- JUN 2018 RELEASED -
- 6 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
charger detection voltage (VCHA). When an abnormal charge current flows into a battery in the overdischarge
condition, the A4002 consequently turns the charging control FET off and stops charging after the battery
voltage becomes the overdischarge detection voltage and the overcharge detection delay time (tCU) elapses.
Abnormal charge current detection is released when the voltage difference between VM pin and GND pin
becomes lower than the charger detection voltage (VCHA) by separating the charger. Since the 0V battery
charging function has higher priority than the abnormal charge current detection function, abnormal charge
current may not be detected by the product with the 0V battery charging function while the battery voltage is
low.
Load Short-circuiting Condition
If voltage of VM pin is equal or below short-circuiting protection voltage (VSHORT), the A4002 will stop
discharging and battery is disconnected from load. The maximum delay time to switch current off is tSHORT
.
This status is released when voltage of VM pin is higher than short protection voltage (VSHORT), such as when
disconnecting the load.
Delay Circuits
The detection delay time for overdischarge current 2 and load short-circuiting starts when overdischarge
current 1 is detected. As soon as overdischarge current 2 or load short-circuiting is detected over detection
delay time for overdischarge current 2 or load short-circuiting, the A4002 stops discharging. When battery
voltage falls below overdischarge detection voltage due to overdischarge current, the A4002 stop discharging
by overdischarge current detection. In this case the recovery of battery voltage is so slow that if battery
voltage after overdischarge voltage detection delay time is still lower than overdischarge detection voltage,
the A4002 shifts to power-down.
0V Battery Charging Function1 2 3
This function enables the charging of a connected battery whose voltage is 0V by self-discharge. When a
charger having 0V battery start charging charger voltage (V0CHA) or higher is connected between B+ and
B-pins, the charging control FET gate is fixed to VDD potential. When the voltage between the gate and the
source of the charging control FET becomes equal to or higher than the turn-on voltage by the charger
voltage, the charging control FET is turned on to start charging. At this time, the discharging control FET is off
and the charging current flows through the internal parasitic diode in the discharging control FET. If the
battery voltage becomes equal to or higher than the overdischarge release voltage (VDU), the normal condition
returns.
REV1.0
- JUN 2018 RELEASED -
- 7 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
TIMING CHART
Overcharge and overdischarge detection
Overdischargecurrent detection
REV1.0
- JUN 2018 RELEASED -
- 8 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Charger Detection
Abnormal Charger Detection
REV1.0
- JUN 2018 RELEASED -
- 9 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
PACKAGE INFORMATION
Dimension in SOT-23S (Unit: mm)
Millimeters
Inches
Symbol
Min.
Max.
1.150
0.100
1.050
0.500
0.150
3.000
1.400
2.550
Min.
Max.
0.045
0.004
0.041
0.020
0.006
0.118
0.055
0.100
A
A1
A2
b
0.900
0.000
0.900
0.300
0.080
2.800
1.200
2.250
0.035
0.000
0.035
0.012
0.003
0.110
0.047
0.089
c
D
E
E1
e
0.950 TYP
0.550 REF.
0.037 TYP
0.022 REF.
e1
L
1.800
2.000
0.071
0.079
L1
θ
0.300
0°
0.500
8°
0.012
0°
0.020
8°
REV1.0
- JUN 2018 RELEASED -
- 10 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Dimension in SOT-25 (Unit: mm)
Millimeters
Inches
Symbol
Min
-
Max
Min
-
Max
A
A1
A2
b
0.900
0.090
0.800
0.500
0.200
3.020
1.700
2.950
0.035
0.004
0.031
0.020
0.008
0.119
0.067
0.116
0.020
0.700
0.350
0.080
2.820
1.600
2.650
0.001
0.028
0.014
0.003
0.111
0.063
0.104
c
D
E1
E
e
0.950(BSC)
1.900(BSC)
0.037(BSC)
0.075(BSC)
e1
L
0.300
0°
0.600
8°
0.012
0°
0.024
8°
θ
REV1.0
- JUN 2018 RELEASED -
- 11 -
AiT Semiconductor Inc.
A4002
www.ait-ic.com
BATTERY MANAGEMENT
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
IMPORTANT NOTICE
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer. As used herein may involve
potential risks of death, personal injury, or server property, or environmental damage. In order to minimize
risks associated with the customer's applications, the customer should provide adequate design and
operating safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV1.0
- JUN 2018 RELEASED -
- 12 -
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