- 您现在的位置：买卖IC网 > PDF目录1834 > LTC4110EUHF#TRPBF (Linear Technology)IC BATTERY BACKUP MANAGER 38-QFN PDF资料下载
参数资料
| 型号： | LTC4110EUHF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 35/52页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY BACKUP MANAGER 38-QFN |
| 标准包装： | 2,500 |
| 功能： | 备份管理 |
| 电池化学： | 铅酸，锂离子，锂聚合物，镍镉，镍氢，超级电容器 |
| 电源电压： | 4.5 V ~ 19 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 带卷 (TR) |
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页第33页第34页当前第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页
LTC4110
APPLICATIONS INFORMATION
the highest current ?ow between charge and calibration
modes, whichever is greater.
Recommended starting values for the ?lter is:
R CSP1 = R CSN1 between 1K and 2K
R SNS ( BAT ) =
100mV
I MAX
R CSP1 + R CSP2 = R CSN1 + R CSN2 = about 3K
C CSP = C CSN = about 3 ? C ITH .
See Table 10 for example values.
R SNS(BAT) accuracy is intentionally made very high to permit
development of an accurate host software based capacity
measurements of standard batteries. Use resistors with
1% accuracy or better or use a 4-terminal Kelvin sensing
resistor. See the PCB Layout section for a reasonable no
cost Kelvin sensing layout that permits the use of less
expensive standard two terminal sense resistors. For more
electrical information relating to R SNS(BAT) itself, see the
Component Selection section.
As designed, any signi?cant AC ripple voltage seen by
CSP and CSN pins can lead to current sensing errors for
Figure 12 shows typical values for C ITH = 0.1μF
R SNS(FET)
The LTC4110’s Flyback converter operates in current mode
with R SNS(FET) monitoring cycle-by-cycle transformer cur-
rent in both Charge and Calibration modes. The LTC4110’s
I SENSE pin serves two functions. First is to regulate the
primary current as required by the feedback loop. Second
is to monitor the secondary current and check for short
circuits. The traditional Flyback primary and secondary
currents look like the following:
both current programming and capacity measurements.
ΔI
I PRI
To prevent the Flyback’s AC ripple voltage from interfering
with DC accuracy, R SNS(BAT) must have a RC ?lter network
0
PRIMARY CURRENT
installed between the R SNS(BAT) and CSP and CSN pins.
The CSP and CSN pins have an input bias current of ±10nA
0
I PRI
N
SECONDARY CURRENT
4110 F13
typically. A very large R CSP1 + R CSP2 value will cause a
large current mismatch error. The current ?owing into
the CSP and CSN pins equals V SNS /(R CSP1 + R CSP2 ) =
100mV/(R CSP1 + R CSP2 ), a very small R CSP1 + R CSP2 value
will result in a large current. Typically a value between 3k
and 30k gives the best performance.
LTC4110
Figure 13. Flyback Primary and Secondary Current
The waveforms in Figure 13 each assume a view of posi-
tive current ?ow into the load. The value N represents the
ratio of the secondary to the primary with the primary
set to a value of 1. Unlike a traditional Flyback topology,
the LTC4110 Flyback is bi-directional, so the meaning of
“primary” is a function of the operating mode. In order
C CSP
R CSP2
330n
R CSP1
+
2k
1k
CA
–
R CSN2
2k
RCSN1
1k
R SNS(BAT)
100mV
C CSN
330n
4110 F12
Figure 12. CSP, CSN RC Filter
4110fb
35
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4150IMS#TRPBF | IC COUNTER/GAUGE GAS/BATT 10MSOP |
| LTC4155IUFD#TRPBF | IC I2C POWER MANAGER DUAL 28QFN |
| LTC4160EUDC-1#TRPBF | IC SWITCH POWER MANAGER 20-QFN |
| LTC4410ES6#TRPBF | IC POWER MANAGER USB TSOT23-6 |
| LTC4411ES5#TRMPBF | IC IDEAL DIODE LOW LOSS TSOT23-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4120IUD#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER, 400MA, QFN-16, Battery Type:Li-Ion, Li-Polymer, Input Voltage:4 |
| LTC4150 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, High-Side Current Sense |
| LTC4150_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Coulomb Counter/ Battery Gas Gauge |
| LTC4150CMS | 功能描述:IC COUNTER/GAUGE GAS/BATT 10MSOP 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 |
| LTC4150CMS#PBF | 功能描述:IC COUNTER/GAUGE GAS/BATT 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 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:2.7 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
发布紧急采购，3分钟左右您将得到回复。