A4001E6R [AITSEMI]
BATTERY MANAGEMENT;
| 型号： | A4001E6R |
| 厂家： | 
AiT Semiconductor |
| 描述： | BATTERY MANAGEMENT |
| 文件： | 总17页 (文件大小：681K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
DESCRIPTION
FEATURES
High-accuracy voltage detection circuit
Overcharge detection voltage
4.200 to 4.400V; Accuracy: ±50mV
Overcharge release voltage
This protection IC was developed for use with
lithium-ion/lithium polymer 1-cell serial batteries.
It detects overcharge, overdischarge, discharge
overcurrent and other abnormalities, and functions to
protect the battery by turning off the external
MOSFET.
3.900 to 4.400V; Accuracy: ±50mV
Overdischarge detection voltage
2.30 to 3.00V; Accuracy: ±100mV
Overdischarge release voltage
2.30 to 3.40V; Accuracy: ±100mV
Discharge overcurrent detection voltage
150mV; Accuracy: ±100mV
The IC also has a built-in timer circuit (for detection
delay times), so fewer external parts can be used in
protection circuit configuration.
Short-circuiting detection voltage
1.35V; Accuracy: ±100mV
Delay times are generated by an internal circuit
(external capacitors are unnecessary).
Overcharge delay time:100ms typ.
Overdischarge delay time: 50ms typ.
Discharge overcurrent delay time:10ms typ.
Charge overcurrent detection voltage:10ms typ.
Short circuit delay time: 5μs typ.
Power-down function ꢀYesꢁ / ꢀNoꢁ are selectable
(See Model List).
Auto overdischarge recovery function ꢀYesꢁ /
ꢀNoꢁ are selectable (See Model List).
Low current consumption
Operation mode: 3.0μA typ. 6.0μA max.
(VCC=3.9V)
The A4001 is available in SOT-26 package.
ORDERING INFORMATION
Package Type
SOT-26
Part Number
A4001E6R
E6
A4001E6VR
V: Halogen free Package
R: Tape & Reel
Note
Power-down mode: 0.1μA max. (VCC=2.0V)
Auto overdischargemode:2.0μA max.
(VCC=2.0V)
AiT provides all RoHS products
Suffix ꢀ V ꢀ means Halogen free Package
0V battery charge function ꢀavailableꢁ /
ꢀunavailableꢁ are selectable (See Model List).
operation temperature range -40℃~+85℃
Available in SOT-26 Package
TYPICAL APPLICATION
REV1.0
- JUN 2014 RELEASED -
- 1 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
PIN DESCRIPTION
Top View
Pin #
Symbol
OD
Direction
Function
MOSFET gate connection pin for discharge control
Input pin for current sense, charger detect
MOSFET gate connection pin for charge control
Test pin for reduce delay time
1
2
3
4
5
6
O
I
CS
OC
O
I
TD
VCC
-
Power supply, through a resistor (R1)
Ground pin
GND
-
REV1.0
- JUN 2014 RELEASED -
- 2 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
ABSOLUTE MAXIMUM RATINGS
GND=0V, Temperature=25℃, unless otherwise specified
VCC, Input voltage between VCC and GND
VOC, OC output pin voltage
GND-0.3V~GND+10V
VCC-14V~VCC+0.3V
GND-0.3V~VCC+0.3V
VCC-14V~VCC+0.3V
-40℃~+85℃
VOD, OD output pin voltage
VCS, CS input pin voltage
TOP, Operating Temperature Range
TST, Storage Temperature Range
-40℃~+125℃
Stress beyond above listed ꢀAbsolute Maximum Ratingsꢁ 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.
MODEL LIST
Param.
Overcharge Overcharge
Over
Over
discharge
Release
VODR
0V Battery
Charge
Function
V0V
Detection
Voltage
VOCP
Release
Voltage
VOCR
discharge
Detection
VODP
Other Function
Model
-
A4001
Auto overdischarge
recovery function
4.30V
4.10V
2.40V
3.00V
available
REV1.0
- JUN 2014 RELEASED -
- 3 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
DC ELECTRICAL CHARACTERISTICS
GND=0V, Temperature=25℃, unless otherwise specified
Parameter
Supply Current
Symbol
Conditions
VCC=3.9V
Min.
Typ.
Max.
Unit
ICC
IPD
IOD
3.0
0.1
2.0
6.0
0.6
uA
uA
uA
Power-Down Current
VCC=2.0V
VCC=2.0V
Auto Overdischarge Recovery Current
3.0
VOCP-
0.05
VOCP+
0.05
VOCR
+0.05
VODP+
0.1
Overcharge Protection Voltage
Overcharge Hysteresis Voltage
Overdischarge Protection Voltage
Overdischarge Release Voltage
VOCP 4.2~4.4V，Adjustable
VOCR 3.9~4.4V，Adjustable
VODP 2.3~3.0V，Adjustable
VOCP
VOCR
VODP
VODR
V
V
V
V
VOCR-
0.05
VODP-
0.1
VODR-
0.1
VODR
+0.1
180
VODR 2.3~3.4V，Adjustable
Overcurrent Protection Voltage
Short Current Protection Voltage
Overcharge Delay Time
VOI1
120
150
1.35
100
50
mV
V
VOI2
TOC
VCC=3.6V
1.05
1.65
200
ms
ms
ms
us
ms
V
Overdischarge Delay Time
Overcurrent Delay Time (1)
Overcurrent Delay Time (2)
Charge Overcurrent Delay Time
Load Detection Threshold Voltage
Charger Detection Threshold Voltage
Charge Overcurrent Detection Voltage
OD Pin Output ꢀHꢁ Voltage
OD Pin Output ꢀLꢁ Voltage
OC Pin Output ꢀHꢁ Voltage
OC Pin Output ꢀLꢁ Voltage
0V Battery Charge
TOD
VCC=3.6V to 2.0V
VCC=3.6V
100
TOI1
TOI2
TCIP
VLD
10
20
VCC=3.6V
5
50
VCC=3.6V，CS=-1.2V
10
20
0.12
-1.2
-1.2
0.15
-0.7
-0.7
0.18
-0.2
VCH
V
VCIP
VODH
VODL
VOCH
VOCL
-0.2
V
VCC-0.1 VCC-0.02
V
0.1
VCC-0.1 VCC-0.02
0.1
0.5
0.5
V
V
V
0V battery charging
Function ꢀavailableꢁ
0V battery charging
Function ꢀunavailableꢁ
V0V
1.2
V
V
Starting Charger Voltage
0V Battery Charge
V0IN
0.5
Inhibition Charger Voltage
REV1.0
- JUN 2014 RELEASED -
- 4 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
TYPICAL PERFORMANCE CHARACTERISTICS
1.
3.
5.
VOCP vs. Temperature
VODR vs.Temperature
VOI1 vs. Temperature
2. VOCR vs. Temperature
4.
VODP vs. Temperature
6.
VOI2 vs. Temperature
REV1.0
- JUN 2014 RELEASED -
- 5 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
7.
TOC vs. Temperature
8.
TOD vs. Temperature
9.
TOI1 vs. Temperature
10. TOI2 vs. Temperature
11. ICC vs. Temperature
12. IPD vs. Temperature
REV1.0
- JUN 2014 RELEASED -
- 6 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
13. IOD vs. Temperature
14. VCHA vs. Temperature
REV1.0
- JUN 2014 RELEASED -
- 7 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
BLOCK DIAGRAM
REV1.0
- JUN 2014 RELEASED -
- 8 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
DETAILED INFORMATION
Normal Condition
This IC monitors the voltage of the battery connected between the VCC pin and GND pin and the voltage
difference between the CS pin and GND pin to control charging and discharging.
When the battery voltage is in the range from overdischarge detection voltage (VODP) to overcharge
detection voltage (VOCP), and the CS pin voltage is in the range from the charger detection voltage (VCH) to
discharge overcurrent detection voltage (VOI1), the IC turns both the charging and discharging control
MOSFET on. This condition is called the normal status. Under this condition, charging and discharging can
both be carried out freely.
Caution: Discharging may not be enacted when the battery is first time connected. To regain normal status,
CS and GND pin must be shorted or the charger must be connected.
Overcharge Protection
When the voltage of the battery cell exceeds the overcharge protection voltage (VOCP) beyond the
overcharge delay time (TOC) period, charging is inhibited by turning off of the charge control MOSFET. The
overcharge condition is released in two cases:
(1) The voltage of the battery cell becomes lower than the overcharge release voltage (VOCR) through
self-discharge.
(2) The voltage of the battery cell falls below the overcharge protection voltage (VOCP) and a load is
connected.
When the battery voltage is above VOCP, the overcharge condition will not release even a load is connected
to the pack.
Overdischarge Status
Products with Power-down Function
When the battery voltage falls below than the overdischarge detection voltage (VODR) during discharging in
the normal status and the detection continues longer than the overdischarge detection delay time (TOD), the
A4001 series will turn the discharging control MOSFET off(OD pin) so as to stop discharging. This condition is
called the overdischarge status.
When the MOSFET is off, CS pin voltage is pulled up by the resistor to VCC in the IC, at this time; the power
consumption is reduced to the lowest. This condition is called the ꢀSLEEP MODEꢁ.
The overdischarge status will be released by two cases:
(1) When CS pin voltage is equal to or lower than the charge overcurrent detection voltage (VCIP) by
charging and the VCC pin voltage is higher than the overdischarge detection voltage (VODR).
REV1.0
- JUN 2014 RELEASED -
- 9 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
(2) When CS pin voltage is equal to or higher than the charge overcurrent detection voltage (VCIP) by
charging and the VCC pin voltage is higher than the overdischarge release voltage (VODR).
Products with Auto Overdischarge Recovery Function
When the battery voltage falls below than the overdischarge detection voltage (VODP) during discharging in
the normal status and the detection continues longer than the overdischarge detection delay time (TOD), the
A4001 series will turn the discharging control MOSFET off(OD pin) so as to stop discharging. This condition is
called the overdischarge status.
The overdischarge status will be released by three cases:
(1) When CS pin voltage is equal to or lower than the charge overcurrent detection voltage (VCIP) by
charging and the VCC pin voltage is higher than the overdischarge detection voltage (VODP).
(2) When CS pin voltage is equal to or higher than the charge overcurrent detection voltage (VCIP) by
charging and the VCC pin voltage is higher than the overdischarge release voltage (VODR).
(3) Without connecting a charger, if the VCC pin voltage is higher than overdischarge release voltage (VODR),
the overdischarge status will be released, namely Auto Overdischarge Recovery Function.
Charge Overcurrent Status
When a battery is in the normalstatus, the voltage of the CS pin is lower than the charge overcurrent detection
voltage (VCIP). When the charge current is higher than the specified value and the status lasts beyond the
charge overcurrent detection delay time(TCIP), the charge control MOSFET will be turned off and charging is
stopped. This status is called the charge overcurrent status.
This IC will be restored to the normal status from the charge overcurrent status when the voltage at the CS pin
returns to charge overcurrent detection voltage (VCIP) or higher by removing the charger.
0V Battery Charging Function ꢀAvailableꢁ
This function is used to recharge a connected battery which voltage is 0V due to self-discharge. When the 0V
battery charge starting charger voltage (V0V) or a higher voltage is applied between the battery+ (BATT+)
and battery- (BATT-) pins by connecting a charger, the charging control MOSFET gate is fixed to the VCC pin
voltage.
When the voltage between the gate and the source of the charging control MOSFET becomes equal to or
higher than the turn on voltage due to the charger voltage, the charging control MOSFET is turned on to
initiate charging. At this time, the discharging control MOSFET is off and the charging current flows through
the internal parasitic diode
In the discharging control MOSFET. When the battery voltage becomes equal to or higher than overdischarge
detection voltage (VODP), the A4001 series will enter into the normal status.
REV1.0
- JUN 2014 RELEASED -
- 10 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Caution
ꢂ1ꢃSome battery providers do not recommend charging for a completely self-discharged battery. Please ask
the battery provider to determine whether to enable or prohibit the 0V battery charging function.
ꢂ2ꢃThe 0V battery charge function has higher priority than the charge overcurrent detection function.
Consequently, a product in which use of the 0V battery charging function is enabled to forcibly charge a
battery and the charge current cannot be detected when the battery voltage is lower than overdischarge
detection voltage (VODP).
0V Battery Charging Function ꢀUnavailableꢁ
When a battery that is internally short-circuited (0V battery) is connected, the unavailable 0V charging
function will prohibit recharging. When the battery voltage equals to the 0V battery charge inhibition battery
voltage (V0IN) or lower, the charging control MOSFET gate is fixed to the BATT- pin voltage to prohibit
charging. When the battery voltage equals to the 0V battery charge inhibition battery voltage (V0IN) or higher,
charging can be implemented.
Caution
Some battery providers do not recommend charging for a completely self-discharged battery. Please ask the
battery provider to determine whether to enable or prohibit the 0V battery charging function.
Selection of External Control MOSFET
Because the overcurrent protection voltage is preset, the threshold current for overcurrent detection is
determined by the turn-on resistance of the charge and discharge control MOSFETs. The turn-on resistance
of the external control MOSFETs can be determined by the equation: RON=VOI1/(2*IT) (IT is the overcurrent
threshold current). For example, if the overcurrent threshold current IT is designed to be 3A, the turn-on
resistance of the external control MOSFET must be 25mΩ. Be aware that turn-on resistance of the MOSFET
changes perawith temture variation due to heal dissipation. It changes with the voltage between gate and
source as well. (Turn-on resistance of MOSFET increases as the voltage between gate and source
decreases). As the turn-on resistance of the external MOSFET changes, the design of the overcurrent
threshold current changes accordingly.
Suppressing the Ripple and Disturbance form Charger
To suppress the ripple and disturbance from charger, connection R1 and C1 to VCC is recommended.
Protection the CS pin
R2 is used for latch-up protection when charger is connected under overdischarge condition and overstress
protection at reverse connection of a charger.
REV1.0
- JUN 2014 RELEASED -
- 11 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Timing Diagram
Overcharge Condition→Load Discharging→Normal Condition
REV1.0
- JUN 2014 RELEASED -
- 12 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Overdischarge Condition→Charging by a Charger→Normal Condition
REV1.0
- JUN 2014 RELEASED -
- 13 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Over Current Condition→Normal Condition
REV1.0
- JUN 2014 RELEASED -
- 14 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
Typical Application Circuit
Symbol
R1
Components
Resistor
Purpose
Limit current, stabilize VCC and
Strengthen ESD protection
Limit current
Min.
Typ.
Max.
Remarks
100Ω
100Ω
200Ω
ꢂ1ꢃ
R2
C1
M1
M2
Resistor
1KΩ
1KΩ
2KΩ
ꢂ2ꢃ
ꢂ3ꢃ
ꢂ4ꢃ
ꢂ5ꢃ
Capacitor
Stabilize VCC
0.01uF
0. 1uF
1.0uF
N-MOSFET Discharge control
N-MOSFET Charge control
-
-
-
-
-
-
ꢂ1ꢃ R1 should be as small as possible to avoid lowering the overcharge detection accuracy due to current
consumption. When a charger is connected in reversed, the current flows from the charger to the IC. At
this time, if R1 is connected to high resistance, the voltage between VCC pin and VSS pin may exceed the
absolute maximum rating.
ꢂ2ꢃ If R2 has a resistance higher than 2kΩ, the charging current may not be cut when a high-voltage charger
is connected. Please select as large a resistance as possible to prevent current when a charger is
connected in reversed.
ꢂ3ꢃ C1 will stabilize the supply voltage of VCC，the value of C1 should be equal to or more than 0.01μF.
ꢂ4ꢃ If a NMOSFET with a threshold voltage equal to or higher than the overdischarge detection voltage is
applied, discharging may be stopped before overdischarge is detected.
ꢂ5ꢃ If the withstanding voltage between the gate and source is lower than the charger voltage, the FET may
be destroyed.
REV1.0
- JUN 2014 RELEASED -
- 15 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
ONE CELL LITHIUM-ION/POLYMER BATTERY PROTECTION IC
PACKAGE INFORMATION
Dimension in SOT-26 Package (Unit: mm)
SYMBOL
MIN
MAX
1.350
0.150
1.200
0.550
0.400
0.200
3.000
3.000
1.700
0.550
A
A1
A2
b
1.050
0.050
1.000
0.400
0.250
0.080
2.7000
2.600
1.500
0.350
b2
c
D
E
E1
L
L1
e
0.600(REF)
0.950(BSC)
1.900(BSC)
e1
θ
0°
3°
6°
10°
7°
θ1
θ2
10°
REV1.0
- JUN 2014 RELEASED -
- 16 -
A4001
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
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 servere 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 2014 RELEASED -
- 17 -
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