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参数资料
| 型号： | LTC4075XEDD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 3/16页 |
| 文件大小： | 195K |
| 代理商： | LTC4075XEDD#TRPBF |
LTC4075/LTC4075X
11
4075Xfa
The power supply status output (
PWR)hastwostates:pull-
down and high impedance. The pull-down state indicates
that power is present at either DCIN or USBIN. This output
is strong enough to drive an LED. If no power is applied at
either pin, the
PWR pin is high impedance, indicating that
the LTC4075 lacks sufcient power to charge the battery.
The pull-down state is capable of sinking up to 10mA.
The USB power status output (USBPWR) has two states:
pull-down and high impedance. The high impedance
state indicates that the LTC4075 is being powered from
the USBIN input. The pull-down state indicates that the
charger is either powered from DCIN or is in a UVLO
condition (see Table 1). The pull-down state is capable of
sinking up to 1mA.
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 105°C. This feature protects
the LTC4075 from excessive temperature and allows the
user to push the limits of the power handling capability of
a given circuit board without risk of damaging 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. DFN power considerations are discussed
further in the Applications Information section.
TRICKLE CHARGE
MODE*
1/10th FULL CURRENT
CHRG STATE: PULLDOWN
SHUTDOWN
MODE
IUSBIN DROPS TO 18A
CHRG STATE: Hi-Z
CHARGE
MODE
FULL CURRENT
CHRG STATE: PULLDOWN
CHARGE
MODE
FULL CURRENT
CHRG STATE: PULLDOWN
STANDBY
MODE
NO CHARGE CURRENT
CHRG STATE: Hi-Z
SHUTDOWN
MODE
IDCIN DROPS TO 20A
CHRG STATE: Hi-Z
BAT > 2.9V
BAT < 2.9V
2.9V < BAT
BAT > 2.9V
BAT < 4.1V
IBAT < ITERMINATE
IN VOLTAGE MODE
IBAT < ITERMINATE
IN VOLTAGE MODE
POWER SELECTION
STANDBY
MODE
NO CHARGE CURRENT
CHRG STATE: Hi-Z
TRICKLE CHARGE
MODE*
1/10th FULL CURRENT
CHRG STATE: PULLDOWN
ENABLE
DRIVEN LOW
ENABLE
DRIVEN LOW
ENABLE
DRIVEN HIGH
DCIN POWER
REMOVED
DCIN POWER
REMOVED
USBIN POWER
REMOVED OR
DCIN POWER
APPLIED
USBIN POWER
REMOVED OR
DCIN POWER
APPLIED
DCIN POWER APPLIED
ONLY USB POWER APPLIED
STARTUP
4075 F01
ENABLE
DRIVEN HIGH
*LTC4075 ONLY
Figure 1. LTC4075 State Diagram of a Charge Cycle
OPERATIO
U
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| LTC4076EDD#TR | 功能描述:IC CHARG BATT LI-ON USB 10DFN RoHS:否 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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