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| 型号： | LTC4006EGN-2#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATTERY 4A 16-SSOP |
| 标准包装： | 100 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 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： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 1341 (CN2011-ZH PDF) |
LTC4006
APPLICATIO S I FOR ATIO
Example:
V DCIN = 19V, f OSC = 345kHz, Q G1 = Q G2 = 15nC.
PD = 292mW
I DCIN = 5mA
Adapter Limiting
An important feature of the LTC4006 is the ability to
automatically adjust charging current to a level which
avoids overloading the wall adapter. This allows the prod-
uct to operate at the same time that batteries are being
charged without complex load management algorithms.
Additionally, 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
between the CLP and DCIN pins. When this voltage ex-
ceeds 100mV, the amplifier will override programmed
charging current to limit adapter current to 100mV/R CL . A
lowpass filter formed by 5k ? and 15nF 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
minimum wall adapter current rating. Subtract 7% for the
input current limit tolerance and use that current to deter-
mine the resistor value.
R CL = 100mV/I LIM
I LIM = Adapter Min Current –
(Adapter Min Current ? 7%)
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 (see Figure 9).
Designing the Thermistor Network
LTC4006
CL1
–
100mV
+
11
CLP
15nF
5k
There are several networks that will yield the desired
function of voltage vs temperature needed for proper
+
AC ADAPTER
operation of the thermistor. The simplest of these is the
*R CL =
12
100mV
ADAPTER CURRENT LIMIT
CLN
+
C IN
R CL * INPUT
TO SYSTEM
LOAD
V IN
4006 F09
voltage divider shown in Figure 10. Unfortunately, since
the HIGH/LOW comparator thresholds are fixed internally,
there is only one thermistor type that can be used in this
Figure 9. Adapter Current Limiting
network; the thermistor must have a HIGH/LOW resis-
tance ratio of 1:7. If this happy circumstance is true for
Table 5. Common R CL Resistor Values
ADAPTER
RATING (A)
1.5
1.8
2.0
2.3
2.5
2.7
3.0
3.3
3.6
4.0
–7% ADAPTER
RATING (A)
1.40
1.67
1.86
2.14
2.33
2.51
2.79
3.07
3.35
3.72
RCL VALUE*
( ? ) 1%
0.068
0.062
0.051
0.047
0.043
0.039
0.036
0.033
0.030
0.027
RCL
LIMIT (A)
1.47
1.61
1.96
2.13
2.33
2.56
2.79
3.07
3.35
3.72
RCL POWER
DISSIPATION (W)
0.15
0.16
0.20
0.21
0.23
0.26
0.28
0.31
0.33
0.37
RCL POWER
RATING (W)
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 non-standard values are popular.
4006fa
15
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| LTC4006EGN-4 | 功能描述:IC CHARGER BATTERY 4A 16-SSOP RoHS:否 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) |
| LTC4006EGN-4#PBF | 功能描述:IC CHARGER BATTERY 4A 16-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 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 |
| LTC4006EGN-4#TR | 功能描述:IC BATT CHGR CC/CV LI-ION 16SSOP RoHS:否 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) |
| LTC4006EGN-4#TRPBF | 功能描述:IC CHARGER BATTERY 4A 16-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) |
| LTC4006EGN-6 | 功能描述:IC CHARGER BATTERY 4A 16-SSOP RoHS:否 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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