参数资料
| 型号： | LTC4100EG#TR |
| 厂商： | Linear Technology |
| 文件页数： | 21/30页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER SMART BATTERY 24-SSOP |
| 标准包装： | 1,800 |
| 功能： | 充电管理 |
| 电池化学： | 智能电池 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 带卷 (TR) |
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LTC4100
APPLICATIONS INFORMATION
Adapter Limiting
–
R CL *
CL1
CLN
4.99k
*R CL =
ADAPTER CURRENT LIMIT
AnimportantfeatureoftheLTC4100istheabilitytoauto-
matically adjust charging current to a level which avoids
overloading the wall adapter. This allows the product to
operate at the same time that batteries are being charged
without complex load management algorithms. Addition-
ally, batteries will automatically be charged at the maximum
possible rate of which the adapter is capable.
This feature is created by sensing total adapter output
current and adjusting charging current downward if a
preset adapter current limit is exceeded. True analog
control is used, with closed loop feedback ensuring that
adapter load current remains within limits. Amplifier CL1 in
Figure 9 senses the voltage across R CL , connected be-
tween the CLP and CLN pins. When this voltage exceeds
100mV, the amplifier will override programmed charging
current to limit adapter current to 100mV/R CL . A lowpass
filter formed by 4.99k and 0.1μF is required to eliminate
switching noise. If the current limit is not used, CLP should
be connected to CLN.
Setting Input Current Limit
To set the input current limit, you need to know the mini-
mum wall adapter current rating. Subtract 7% for the input
current limit tolerance and use that current to determine
the resistor value.
R CL = 100mV/I LIM
I LIM = Adapter Min Current
– (Adapter Min Current ? 7%)
Table 8. Common RCL Resistor Values
LTC4100
CLP
24 V IN
C9
0.1μF
+ 23
R1
100mV
INFET TO LOAD
4
100mV
4100 F09
Figure 9. Adaptor Current Limiting
As is often the case, the wall adapter will usually have at
least a +10% current limit margin and many times one
can simply set the adapter current limit value to the actual
adapter rating (Figure 9).
Charge Termination Issues
Batteries with constant current charging and voltage-
based charger termination might experience problems
with reductions of charger current caused by adapter
limiting. It is recommended that input limiting feature be
defeated in such cases. Consult the battery manufacturer
for information on how your battery terminates charging.
Setting Output Current Limit (Refer to Figure 1)
The LTC4100 current DAC and the PWM analog circuitry
must coordinate the setting of the charger current. Failure
to do so will result in incorrect charge currents.
ADAPTER RATING (A) –7% ADAPTER RATING (A)
R CL VALUE* (Ω) 1%
R CL LIMIT (A) R CL POWER DISSIPATION (W)
R CL POWER RATING (W)
1.5
1.8
2.0
2.3
2.5
2.7
3.0
3.3
3.6
4.0
1.40
1.67
1.86
2.14
2.33
2.51
2.79
3.07
3.35
3.72
0.068
0.062
0.051
0.047
0.043
0.039
0.036
0.033
0.030
0.027
1.47
1.61
1.96
2.13
2.33
2.56
2.79
3.07
3.35
3.72
0.15
0.16
0.20
0.21
0.23
0.26
0.28
0.31
0.33
0.37
0.25
0.25
0.25
0.25
0.50
0.50
0.50
0.50
0.50
0.50
* Rounded to nearest 5% standard step value. Many nonstandard values are popular.
21
For more information www.linear.com/LTC4100
4100fc
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相关代理商/技术参数 |
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| LTC4100EGTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Smart Battery Charger Controller |
| LTC4101 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Smart Battery Charger Controller |
| LTC4101EG | 制造商:LINER 制造商全称:Linear Technology 功能描述:Smart Battery Charger Controller |
| LTC4101EG#PBF | 功能描述:IC CNTRLR BATT CHRG 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4101EG#TRPBF | 功能描述:IC CNTRLR BATT CHRG 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
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