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参数资料
| 型号： | LTC4096XEDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI-ION DL 10-DFN |
| 标准包装： | 121 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.25 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 管件 |
LTC4096/LTC4096X
APPLICATIONS INFORMATION
Manual Shutdown
The SUSP pin has a 3.4M Ω pulldown resistor to GND. A
logic low enables the charger and logic high disables it
(the pulldown defaults the charger to the charging state).
The DCIN input draws 20μA when the charger is in shut-
down. The USBIN input draws 20μA during shutdown if
no power is applied to DCIN, but draws only 10μA when
V DCIN > V USBIN .
Thermal Limiting
An internal thermal feedback loop reduces the programmed
charge current if the die temperature attempts to rise
above a preset value of approximately 115°C. This feature
protects the LTC4096 from excessive temperature and
allows the user to push the limits of the power handling
capability of a given circuit board without risk of damag-
ing the device. The charge current can be set according
to typical (not worst case) ambient temperature with the
assurance that the charger will automatically reduce the
current in worst case conditions. A safety thermal shut
down circuit will turn off the charger if the die temperature
rises above a value of approximately 150°C. DFN power
considerations are discussed further in the Applications
Information section.
STARTUP
DCIN POWER APPLIED
DCIN POWER
REMOVED
POWER SELECTION
ONLY USB POWER APPLIED
USBIN POWER
REMOVED OR
DCIN POWER
BAT < 2.9V
TRICKLE CHARGE*
MODE
1/10th FULL CURRENT
CHRG STATE: PULLDOWN
PWR STATE: DCIN
BAT > 2.9V
APPLIED
TRICKLE CHARGE*
MODE
1/10th FULL CURRENT
CHRG STATE: PULLDOWN
PWR STATE: USBIN
BAT > 2.9V
BAT < 2.9V
2.9V < BAT
CHARGE
MODE
CHARGE
MODE
2.9V < BAT
FULL CURRENT
CHRG STATE: PULLDOWN
PWR STATE: DCIN
I BAT < I TERMINATE
IN VOLTAGE MODE
STANDBY
MODE
FULL CURRENT
CHRG STATE: PULLDOWN
PWR STATE: USBIN
I BAT < I TERMINATE
IN VOLTAGE MODE
STANDBY
MODE
BAT < 4.15V
NO CHARGE CURRENT
CHRG STATE: Hi-Z
PWR STATE: DCIN
NO CHARGE CURRENT
CHRG STATE: Hi-Z
PWR STATE: USBIN
BAT < 4.15V
SUSP
SHUTDOWN
MODE
SUSP
DRIVEN HIGH
SUSP
DRIVEN HIGH
SHUTDOWN
MODE
SUSP
DRIVEN LOW
I DCIN DROPS TO 20 μ A
I USBIN DROPS TO 20 μ A
DRIVEN LOW
CHRG STATE: Hi-Z
PWR STATE: DCIN
*NOT PRESENT IN THE "X" VERSION
DCIN POWER
REMOVED
USBIN POWER
REMOVED OR
DCIN POWER
APPLIED
CHRG STATE: Hi-Z
PWR STATE: USBIN
4096 F01
Figure 1. LTC4096 State Diagram of a Charge Cycle
4096xf
11
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