A4051MP8VR [AITSEMI]
BATTERY MANAGEMENT;
| 型号： | A4051MP8VR |
| 厂家： | 
AiT Semiconductor |
| 描述： | BATTERY MANAGEMENT |
| 文件： | 总10页 (文件大小：413K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
DESCRIPTION
FEATURES
The A4051 is a complete constant current & constant
voltage linear charger for single cell lithium-ion
batteries. Its PSOP package and low external
component count make the A4051 ideally suited for
portable applications. Furthermore, the A4051 is
specifically designed to work within USB power
specifications.
No external sense resistor is needed, and no blocking
diode is required due to the internal MOSFET
architecture. Thermal feedback regulates the charge
current to limit the die temperature during high power
operation or high ambient temperature. The charge
voltage is fixed at 4.2V, and the charge current can
be programmed externally with a single resistor. The
A4051 automatically terminates the charge cycle
when the charge current drops to 1/10th the
programmed value after the final float voltage is
reached.
Programmable Charge Current Up to 1000mA
No MOSFET, Sense Resistor or Blocking Diode
Required
Complete Linear Charger in PSOP Package for
single Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
from USB Port
Preset 4.2V Charge Voltage
Charge Current Monitor Output for Gas Gauging
Automatic Recharge
Charge state pairs of output, no battery and fault
status display
C/10 Charge Termination
50uA Supply Current in Shutdown
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Battery temperature monitoring function
Available in PSOP8 Package
When the input supply (wall adapter or USB supply)
is removed, the A4051 automatically enters a low
current state, dropping the battery drain current to
less than 2uA. The A4051 can be put into shutdown
mode, reducing the supply current to 50uA.
APPLICATION
Other features include Battery temperature monitor,
under-voltage lockout, automatic recharge and two
status pins to indicate charge and charge termination.
Cellular Telephones, PDAs, MP3 /MP4 Players
Charging Docks and Cradles
Bluetooth 、GPS Applications
The A4051 is available in PSOP8 Package
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
A4051MP8R
A4051MP8VR
PSOP8
SPQ: 4,000pcs/Reel
MP8
V: Halogen free package
R: Tape & Reel
Note
AiT provides all RoHS products,
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 1 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
PIN DESCRIPTION
Top View
Pin # Symbol
Function
Battery temperature detection input. TEMP pin to receive the battery NTC sensor output. If
the TEMP pin voltage is less than the input voltage is greater than 45% or 80% of the input
voltage means the battery temperature is too low or too high, then the charge has been
suspended.
If the TEMP direct access GND, battery temperature detection canceled, the other
charged and functioning properly.
1
TEMP
Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current
is programmed by connecting a 1% resistor, RPROG, to ground. When charging in
trickle-current mode, this pin servos to 0.1V. When charging in constant-current mode, this
pin servos to 1V. In all modes, the voltage on this pin can be used to measure the charge
current using the following formula: IBAT = (VPROG/RPROG) •1000.
The PROG pin can also be used to shut down the charger. Disconnecting the program
resistor from ground allows a 3uA current to pull the PROG pin high. When it reaches the
1.21V shutdown threshold voltage, the charger enters shutdown mode, charging stops and
the input supply current drops to 50uA. This pin is also clamped to approximately 2.4V.
Driving this pin to voltages beyond the clamp voltage will draw currents as high as 1.5mA.
Reconnecting RPROG to ground will return the charger to normal operation.
Ground
2
PROG
3
4
GND
VCC
Positive Input Supply Voltage. Provides power to the charger, VCC can range from 4.25V to
6.5V and should be bypassed with at least a 10uF capacitor. When VCC drops to within
30mV of the BAT pin voltage, the A4051 enters shutdown mode, dropping IBAT to less than
2uA.
Charge Current Output. Provides charge current to the battery and regulates the final float
voltage to 4.2V. An internal precision resistor divider from this pin sets the float voltage
which is disconnected in shutdown mode
5
6
7
BAT
The completion of battery charging instructions side. When the battery charge is complete,
STDBY STDBY pulled low by internal switches, indicating the completion of charging. In addition,
STDBY pin will be in a high-impedance state.
Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is pulled
low by an internal N-channel MOSFET. When the charge cycle is completed, CHRG pin
will be in a high-impedance state.
CHRG
Chip enable input High input level would A4051 is in normal working condition; low input
level so that A4051 is prohibited charging status. CE pin can be TTL or CMOS level-level
driver
8
CE
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 2 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
ABSOLUTE MAXIMUM RATINGS
VCC, Input Supply Voltage
VPROG, PROG pin Voltage
VBAT, BAT pin Voltage
VSS-0.3 V～VSS+8V
VSS-0.3 V～VCC+0.3V
VSS-0.3 V～8V
VSS-0.3V～VSS+8V
1400mA
VCHRG, CHAG pin Voltage
IBAT, BAT pin Current
IPROG, PROG pin Current
1400uA
TOPA, Operating Ambient Temperature
TSTR, Storage Temperature
Lead Temperature (Soldering, 10s)
-40℃～+85℃
-65℃～+125℃
260℃
Stresses above may cause permanent damage to the device. These are stress ratings only and functional operation of the device at
these or any other conditions beyond those indicated in the Electrical Characteristics are not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 3 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
VCC
Conditions
Min
Typ
Max
Unit
Input supply voltage
4.25
-
-
-
6.5
2000
500
V
uA
uA
Charge mode, RPROG =10k
Standby mode
350
150
Input supply current
Regulated Output Voltage
BAT pin Current
ICC
VFLOAT
IBAT
Shutdown mode
(RPROG not connected,
VCC<VBAT or VCC<VUV)
-
50
100
uA
0°C≤TA≤85°C, IBAT = 40mA 4.177
4.263
550
V
RPROG =2k,Current mode
RPROG =1k,Current mode
Standby mode, VBAT=4.2V
Shutdown mode
Sleep mode, VCC=0V
VBAT<VTRIKL, RPROG=1k
450
900
0
-
-
500
1000 1100
-2.5
-1
-0.3
100
mA
-6
-2.5
-2.5
110
uA
Trickle charge current
Trickle charge Threshold
Voltage
Trickle voltage hysteresis
voltage
VCC Undervoltage lockout
Threshold
VCC Undervoltage lockout
hysteresis
VCC-VBAT Lockout Threshold
voltage
ITRIKL
90
mA
V
VTRIKL
RPROG =10k，VBAT Rising
RPROG =10k
2.8
118
3.7
2.9
135
3.8
3.0
157
3.93
300
VTRHYS
VUV
VUVHYS
VASD
mV
V
From VCC low to high
150
200
mV
mV
VCC from low to high
VCC from high to low
250
100
5
R
PROG=1k
0.085
0.1
0.115
C/10 Termination Current
Threshold
ITERM
mA/mA
RPROG=2k
RPROG =1k, Current mode
0.085
0.93
-
0.1
1.0
0.115
1.07
0.8
PROG pin Voltage
VPROG
VCHRG
VSTDBY
V
V
V
CHRG pin Output low voltage
STDBY pin Output low voltage
ICHRG=2.5mA
0.35
ISTDBY=2.5mA
-
0.35
0.8
Recharge Battery threshold
Voltage
ΔVRECG VFLOAT - VRECHRG
50
100
200
mV
CE high voltage
CE low voltage
VCE-H
VCE-L
1.2
-
-
-
-
V
V
0.6
TEMP pin voltage of the
high-end flip
TEMP pin voltage of the low-end
flip
Limited temperature patterns in
the junction temperature
VTEMP-H
VTEMP-L
TLIM
-
42
-
80
45
82
-
%VCC
%VCC
℃
145
-
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 4 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
TYPICAL CHARACTERISTICS
1. VPROG vs VIN
2. VFLOAT vs VCC
3. ITRICKL vs VCC (VBAT=2.5V)
4. IBAT vs VCC (VBAT=3.8V)
5. IBAT vs VBAT
6. Regulated Output (Float) Voltage vs Temp
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 5 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
7. PROG Pin Voltage vs Temp
8. Charge Current vs PROG Pin Voltage
9. Trickle Charge Threshold vs Temperature
10. Recharge Voltage Threshold vs Temperature
12. PROG Pin Pull-Up Current vs Temperature and
Supply Voltage
11. Charge Current vs Ambient Temperature
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 6 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
13. PROG Pin Current vs PROG Pin Voltage
(Pull-Up Current)
14. PROG Pin Current vs PROG Pin Voltage
(Clamp Current)
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 7 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
BLOCK DIAGRAM
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 8 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
PACKAGE INFORMATION
Dimension in PSOP8 Package (Unit: mm)
Symbol
Min
Max
A
A1
A2
b
1.350
0.050
1.350
0.330
0.170
4.700
3.202
3.800
5.800
2.313
1.750
0.150
1.550
0.510
0.250
5.100
3.402
4.000
6.200
2.513
c
D
D1
E
E1
E2
e
1.270(BSC)
L
0.400
0°
1.270
8°
θ
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 9 -
A4051
BATTERY MANAGEMENT
AiT Semiconductor Inc.
www.ait-ic.com
1A LINEAR LI-ION BATTERY CHARGER
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
In order to
involve potential risks of death, personal injury, or servere property, or environmental damage.
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.
REV1.3
- JUN 2010 RELEASED, APR 2017 UPDATED -
- 10 -
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