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参数资料
| 型号： | LTC4075EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARG BATT LI-ON USB 10DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.3 V ~ 8 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： | 带卷 (TR) |
LTC4075/LTC4075X
OPERATIO
R IDC =
, I CHRG ? DC =
=
, I CHRG ? USB =
I BAT =
V IDC
= IUSB ? 1000 , ( ch arg ing fromUSB sup ply )
TheLTC4075isdesignedtoef?cientlymanagechargingof
a single-cell lithium-ion battery from two separate power
sources: a wall adapter and USB power bus. Using the
constant-current/constant-voltage algorithm, the charger
can deliver up to 950mA of charge current from the wall
adapter supply or up to 650mA of charge current from the
USB supply with a ?nal ?oat voltage accuracy of ±0.6%.
The LTC4075 has two internal P-channel power MOSFETs
and thermal regulation circuitry. No blocking diodes or
external sense resistors are required.
Power Source Selection
The LTC4075 can charge a battery from either the wall
adapter input or the USB port input. The LTC4075 automati-
cally senses the presence of voltage at each input. If both
power sources are present, the LTC4075 defaults to the
wall adapter source provided suf?cient power is present
at the DCIN input. “Suf?cient power” is de?ned as:
? Supply voltage is greater than the UVLO threshold.
? Supply voltage is greater than the battery voltage by
50mV (180mV rising, 50mV falling).
The open drain power status outputs ( ? P ? W ? R and USBPWR)
indicate which power source has been selected. Table 1
describes the behavior of these status outputs.
Programming and Monitoring Charge Current
The charge current delivered to the battery from the wall
adapter supply is programmed using a single resistor
from the IDC pin to ground. Likewise, the charge current
from the USB supply is programmed using a single resis-
tor from the IUSB pin to ground. The program resistor
and the charge current (I CHRG ) are calculated using the
following equations:
1000 V 1000 V
I CHRG ? DC R IDC
1000 V 1000 V
R IUSB
I CHRG ? USB R IUSB
Charge current out of the BAT pin can be determined at
any time by monitoring the IDC or IUSB pin voltage and
using the following equations:
? 1000 , ( ch arg ing fromwall adapter )
R IDC
V
I BAT
R IUSB
Programming Charge Termination
Table 1. Power Source Selection
V USBIN > 3.95V and
V USBIN > BAT + 50mV
V USBIN < 3.95V or
V USBIN < BAT + 50mV
The charge cycle terminates when the charge current falls
below the programmed termination threshold during con-
stant-voltage mode. This threshold is set by connecting an
V DCIN > 4.15V and
V DCIN > BAT + 50mV
Device powered from
wall adapter source;
USBIN current < 25μA
? P ? W ? R: LOW
Device powered from
wall adapter source
? P ? W ? R: LOW
external resistor, R ITERM , from the ITERM pin to ground.
The charge termination current threshold (I TERMINATE ) is
set by the following equation:
V DCIN < 4.15V or
V DCIN < BAT + 50mV
USBPWR: LOW
Device powered from
USB source;
? P ? W ? R: LOW
USBPWR: LOW
No charging
? P ? W ? R: Hi-Z
R ITERM =
100 V
I TERMINATE
, I TERMINATE =
100 V
R ITERM
USBPWR: Hi-Z
USBPWR: LOW
4075Xfa
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4075HVX | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage Dual Input Li-Ion/Polymer Battery Charger |
| LTC4075HVXEDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage Dual Input Li-Ion/Polymer Battery Charger |
| LTC4075HVXEDD#PBF | 功能描述:IC CHARGER LI-ION 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 |
| LTC4075HVXEDD#PBF | 制造商:Linear Technology 功能描述:BATT CHARGER LI ON DUAL 10DFN 制造商:Linear Technology 功能描述:BATT CHARGER, LI ON, DUAL, 10DFN |
| LTC4075HVXEDD#TRPBF | 功能描述:IC CHARGER LI-ION 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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