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参数资料
| 型号： | LTC4052EMS8E-4.2 |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER PULSE LI-ION 8-MSOP |
| 标准包装： | 50 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.5 V ~ 10 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 8-MSOP-EP |
| 包装： | 管件 |
LTC4052-4.2
Lithium-Ion Battery
Pulse Charger with
Overcurrent Protection
FEATURES
DESCRIPTIO
s
s
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Very Low Power Dissipation: 350mW at 1A
Complete Standalone Pulse Charger for 1-Cell
Lithium-Ion Batteries
Requires No Microcontroller, MOSFET or
Blocking Diode
Sense Resistor Limits Maximum Current for Safety
Programmable Charge Termination Timer for
Maximum Capacity Charging
± 1% Float Voltage Accuracy
Near End-of-Charge (C/10) Detection Output
AC Wall Adapter Present Output
Low Battery Drain when Input Supply Is Removed
Automatic Trickle Charge for Low Battery
Automatic Battery Refresh
Thermal Shutdown Protection
Tiny Thermally Enhanced MSOP Package
The LTC ? 4052 is a complete standalone pulse charger
with integrated MOSFET for 1-cell lithium-ion batteries.
An external sense resistor provides overcurrent limiting as
a safety precaution against a user connecting a wall
adapter with the incorrect or no current limit. The internal
MOSFET prevents reverse battery current from flowing if
the input voltage is shorted to ground, eliminating the
need for a blocking diode.
As the battery accepts charge and approaches the
programmed float voltage, the internal MOSFET begins
switching off and on with the duty cycle gradually decreas-
ing as the battery approaches a fully charged condition.
A programmable timer terminates the charge cycle. The
near end-of-charge C/10 condition is indicated at the
CHRG pin when the average charge current falls to one-
Handheld Computers
Cellular Telephones
Cradle Chargers
APPLICATIO S
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tenth of the wall adapter current. Removing the input
voltage puts the LTC4052 into a sleep mode, dropping the
battery current drain to less than 1 μ A.
The LTC4052 is available in a tiny 8-pin thermally
enhanced MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Single Cell 4.2V, 1A, Standalone Li-Ion Battery Charger
V IN = 4.5V TO 10V
WITH 1A
4.5
LTC4052 Charge Profile
4.7 ?
CURRENT LIMIT
CHARGE STATUS
AC PRESENT
1 μ F
1k
1k
6
3
V IN
LTC4052
GATE
CHRG
7
10k
0.047 μ F
0.022 μ F
R SENSE
0.05 ?
4.0
3.5
3.0
1.0
0.5
CONSTANT
CURRENT
PULSING
CURRENT
CHARGE
CYCLE
ENDS
2
ACPR
TIMER
5
C TIMER
0.1 μ F
SENSE
BAT
GND
4
1
8
1-CELL 4.2V
Li-Ion
BATTERY
0
5
0
0
0.5
C/10
1.0 1.5 2.0
TIME (HOURS)
2.5
3.0
4052 TA01
4052 ? TA01b
405242f
1
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| LTC4053EDD-4.2#TRPBF | 功能描述:IC CHARGER BATTERY USB 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
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