- 您现在的位置：买卖IC网 > PDF目录16012 > LTC4098EUDC-1#TRPBF (Linear Technology)IC CHARGER USB COMP 20-UTQFN PDF资料下载
参数资料
| 型号： | LTC4098EUDC-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 23/32页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER USB COMP 20-UTQFN |
| 标准包装： | 2,500 |
| 系列： | Bat-Track™, PowerPath™ |
| 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： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN-EP（3x4） |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC4098EUDC-1#TRPBF-ES LTC4098EUDC-1#TRPBF-ES-ND |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页当前第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
LTC4098/LTC4098-1
APPLICATIONS INFORMATION
is used in the compensation of the switching regulator. At
least 10μF with low ESR are required on V OUT . Additional
capacitance will improve load transient performance
and stability.
Multilayer ceramic chip capacitors typically have excep-
tional ESR performance. MLCCs combined with a tight
board layout and an unbroken ground plane will yield very
good performance and low EMI emissions.
There are several types of ceramic capacitors avail-
able each having considerably different characteristics.
For example, X7R ceramic capacitors have the best voltage
and temperature stability. X5R ceramic capacitors have
apparently higher packing density but poorer performance
over their rated voltage and temperature ranges. Y5V
ceramic capacitors have the highest packing density,
but must be used with caution, because of their extreme
nonlinear characteristic of capacitance versus voltage. The
actual in-circuit capacitance of a ceramic capacitor should
be measured with a small AC signal and DC bias as is
expected in-circuit. Many vendors specify the capacitance
charger for more current than is available will not cause
the average input current limit to be violated. It will merely
allow the battery charger to make use of all available
power to charge the battery as quickly as possible, and
with minimal power dissipation within the charger.
Overvoltage Protection
It is possible to protect both V BUS and WALL from over-
voltage damage with several additional components, as
shown in Figure 7. Schottky diodes D1 and D2 pass the
larger of V1 and V2 to R1 and OVSENS. If either V1 or V2
exceeds 6V plus V F(SCHOTTKY) , OVGATE will be pulled to
GND and both the WALL and USB inputs will be protected.
Each input is protected up to the drain-source breakdown,
BVDSS, of MN1 and MN2. R1 must also be rated for the
power dissipated during maximum overvoltage. See the
Operations section for an explanation of this calculation.
Table 4 shows some N-channel MOSFETs that may be
suitable for overvoltage protection.
Table 4. Recommended OVP FETs
versus voltage with a 1V RMS AC test signal and, as a result,
over state the capacitance that the capacitor will present
in the application. Using similar operating conditions as
the application, the user must measure or request from
the vendor the actual capacitance to determine if the
selected capacitor meets the minimum capacitance that
the application requires.
N-CHANNEL
MOSFET
Si2302ADS
IRLML2502
Si1472DH
NTLJS4114N
FDN372S
BVDSS
20V
20V
30V
30V
30V
R ON
70m Ω
35m Ω
65m Ω
20m Ω
45m Ω
PACKAGE
SOT-23
SOT-23
SC70-6
2mm × 2mm
DFN
SOT-23
Overprogramming the Battery Charger
The USB high power specification allows for up to 2.5W
to be drawn from the USB port. The switching regulator
transforms the voltage at V BUS to just above the voltage
V1
MN1
WALL
OVGATE
at BAT with high efficiency, while limiting power to less
than the amount programmed at CLPROG. The charger
should be programmed (with the PROG pin) to deliver the
V2
D2
D1
MN2
C1
LTC4098/
LTC4098-1
V BUS
maximum safe charging current without regard to the USB
specifications. If there is insufficient current available to
charge the battery at the programmed rate, it will reduce
R1
OVSENS
charge current until the system load on V OUT is satisfied
and the V BUS current limit is satisfied. Programming the
40981 F07
Figure 7. Dual Input Overvoltage Protection
40981fc
23
相关PDF资料 |
PDF描述 |
|---|---|
| M3UEK-2660K | IDC CABLE - MKS26K/MC26F/MCE26K |
| M3BBK-5020K | IDC CABLE - MSR50K/MC50F/MSR50K |
| M3DDK-5020K | IDC CABLE - MKR50K/MC50F/MKR50K |
| LTC4070IDDB#TRMPBF | IC BATT CHRGR LIION/POLY 8DFN |
| IMC0805ERR82J | INDUCTOR 820NH 5% 0805 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4098EUDC-3.6#PBF | 功能描述:IC CHARGER USB COMP 3.6V 20UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:Bat-Track™, PowerPath™ 标准包装:2,000 系列:Impedance Track™ 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.4 V ~ 2.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:带卷 (TR) 产品目录页面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名称:296-21665-2 |
| LTC4098EUDC-3.6#PBF | 制造商:Linear Technology 功能描述:IC, POWER MANAGER/BATTERY CHARGER, QFN20 |
| LTC4098EUDC-3.6#TRPBF | 功能描述:IC CHARGER USB COMP 3.6V 20UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:Bat-Track™, PowerPath™ 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 |
| LTC4099 | 制造商:LINER 制造商全称:Linear Technology 功能描述:I2C Controlled USB Power Manager/Charger with Overvoltage Protection |
| LTC4099EPDC#PBF | 功能描述:IC USB PWR MANAGER/CHRGR 20UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:PowerPath™ 标准包装:1 系列:- 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:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
发布紧急采购，3分钟左右您将得到回复。