参数资料
| 型号： | LTC4095EDC#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI-ION/POLY 8-DFN |
| 标准包装： | 2,500 |
| 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： | 4.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（2x2） |
| 包装： | 带卷 (TR) |
LTC4095
OPERATION
Charge Cycle Overview
When a battery charge cycle begins, the battery charger
?rst determines if the battery is deeply discharged. If the
battery voltage is below V TRKL , typically 2.9V, an automatic
trickle charge feature sets the battery charge current to
10% of the full-scale value.
Once the battery voltage is above 2.9V, the battery charger
begins charging in constant-current mode. When the bat-
tery voltage approaches the 4.2V required to maintain a full
charge, otherwise known as the ?oat voltage, the charge
current begins to decrease as the LTC4095 switches into
constant-voltage mode.
Trickle Charge and Defective Battery Detection
Any time the battery voltage is below V TRKL , the charger
goes into trickle charge mode and reduces the charge
current to 10% of the full-scale current. If the battery
voltage remains below V TRKL for more than 1/2 hour, the
charger latches the bad-battery state, automatically termi-
nates, and indicates via the ? C ? H ? R ? G pin that the battery was
unresponsive. If for any reason the battery voltage rises
above V TRKL , the charger will resume charging. Since the
charger has latched the bad-battery state, if the battery
voltage then falls below V TRKL again but without rising past
V RECHRG ?rst, the charger will immediately assume that
the battery is defective. To reset the charger (i.e., when
the dead battery is replaced with a new battery), simply
remove the input voltage and reapply it or put the part in
and out of suspend mode.
Charge Termination
The battery charger has a built-in safety timer that sets
the total charge time for 4 hours. Once the battery voltage
Automatic Recharge
After the battery charger terminates, it will remain off,
drawing only microamperes of current from the battery.
If the portable product remains in this state long enough,
the battery will eventually self discharge. To ensure that the
battery is always topped off, a charge cycle will automati-
cally begin when the battery voltage falls below V RECHRG
(typically 4.105V). In the event that the safety timer is
running when the battery voltage falls below V RECHRG , it
will reset back to zero. To prevent brief excursions below
V RECHRG from resetting the safety timer, the battery voltage
must be below V RECHRG for more than 1.7ms. The charge
cycle and safety timer will also restart if the IN UVLO or
DUVLO cycles low and then high (e.g., IN is removed
and then replaced) or the charger enters and then exits
suspend mode.
Programming Charge Current
The PROG pin serves both as a charge current program
pin, and as a charge current monitor pin. By design, the
PROG pin current is 1/800th of the battery charge current.
Therefore, connecting a resistor from PROG to ground
programs the charge current while measuring the PROG pin
voltage allows the user to calculate the charge current.
Full-scale charge current is de?ned as 100% of the con-
stant-current mode charge current programmed by the
PROG resistor. In constant-current mode, the PROG pin
servos to 1V if HPWR is high, which corresponds to charg-
ing at the full-scale charge current, or 200mV if HPWR
is low, which corresponds to charging at 20% of the full-
scale charge current. Thus, the full-scale charge current
and desired program resistor for a given full-scale charge
current are calculated using the following equations:
rises above V RECHRG (typically 4.105V) and the charger
enters constant-voltage mode, the 4-hour timer is started.
After the safety timer expires, charging of the battery will
I CHG =
800 V
R PROG
discontinue and no more current will be delivered.
R PROG =
800 V
I CHG
4095fa
8
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4096XEDD#TRPBF | IC CHARGER LI-ION DL 10-DFN |
| LTC4097EDDB#TRPBF | IC CHARGER LI-ION/POLY 12-DFN |
| LTC4098EUDC#TRPBF | IC CHARGER USB COMP 20-UTQFN |
| LTC4099EUDC#PBF | IC USB PWR MANAGER/CHRGR 20-QFN |
| LTC4100EG#TR | IC CHARGER SMART BATTERY 24-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4096 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Chargers |
| LTC4096EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Chargers |
| LTC4096EDD#PBF | 功能描述:IC CHARGER LI-ION DL 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 |
| LTC4096EDD#TRPBF | 功能描述:IC CHARGER LI-ION DL 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 |
| LTC4096X | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Chargers |
发布紧急采购，3分钟左右您将得到回复。