- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384633 > LTC1760 (Linear Technology Corporation) Dual Smart Battery System Manager PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC1760 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual Smart Battery System Manager |
| 中文描述： | 雙智能電池系統(tǒng)管理 |
| 文件頁數(shù)： | 33/44頁 |
| 文件大?。?/td> | 379K |
| 代理商： | LTC1760 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當(dāng)前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
LTC1760
33
sn1760 1760is
Setting Input Current Limit
To set the input current limit, you need to know the
minimum wall adapter current rating. Subtract 5% 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 5%)
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 Table 1).
Table 1. Common R
CL
Resistor Values
Adapter
Rating A
1.5
1.8
2
2.3
2.5
2.7
3
*Values shown above are rounded to nearest standard value.
Extending System to More than 2 Batteries
The LTC1760 can be extended to manage systems with
more than 3 sources of power. Contact Linear Technology
Applications Engineering for more information.
RCL Value*
(
) 1%
0.06
0.05
0.045
0.039
0.036
0.033
0.030
RCL Power
Dissipation (W)
0.135
0.162
0.18
0.206
0.225
0.241
0.27
RCL Power
Rating (W)
0.25
0.25
0.25
0.25
0.5
0.5
0.5
Charge Termination Issues
Batteries with constant-current charging and voltage-
based charger termination might experience problems
From here we can simplify.
I
BAT1
/C
BAT1
= dV/dt = I
BAT2
/C
BAT2
I
BAT2
= I
BAT1
C
BAT2
/C
BAT1
At this point you can see that the current divides as the ratio
of the two batteries capacity ratings. The sum of the
current into both batteries is the same as the current being
supply by the charger. This is independent of the mode of
the charger (CC or CV).
I
CHRG
= I
BAT1
+ I
BAT2
From here we solve for the actual current for each battery.
I
BAT2
= I
CHRG
C
BAT2
/(C
BAT1
+ C
BAT2
)
I
BAT1
= I
CHRG
C
BAT1
/(C
BAT1
+ C
BAT2
)
Please note that the actual observed current sharing will
vary from manufactures claimed capacity ratings since it
is actual physical capacity rating at the time of charge.
Capacity rating will change with age and use and hence the
current sharing ratios can change over time.
Adapter Limiting
An important feature of the LTC1760 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 0.1
μ
F is required to
eliminate switching noise. If the current limit is not used,
CLP should be connected to DCIN.
Figure 9.
100mV
–
+
5k
CLP
DCIN
1760 F09
0.1
μ
F
+
R
CL
*
C
IN
V
IN
CL1
AC ADAPTER
INPUT
*R
CL
=
100mV
ADAPTER CURRENT LIMIT
+
APPLICATIOU
W
U
U
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1760CFW | Dual Smart Battery System Manager |
| LTC2286 | Dual 10-Bit, 65/40/25Msps Low Noise 3V ADCs |
| LTC2286CUP | Dual 10-Bit, 65/40/25Msps Low Noise 3V ADCs |
| LTC2286IUP | Dual 10-Bit, 65/40/25Msps Low Noise 3V ADCs |
| LTC2286UP | Dual 10-Bit, 65/40/25Msps Low Noise 3V ADCs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1760CFW | 功能描述:IC MANAGER BATTERY DUAL 48TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1760CFW#PBF | 功能描述:IC MANAGER BATTERY DUAL 48TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關(guān)文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標(biāo)準(zhǔn)包裝:4,000 系列:- 功能:燃料，電量檢測計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LTC1760CFW#PBF | 制造商:Linear Technology 功能描述:Battery Management IC 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 4.28A, TSSOP-48 |
| LTC1760CFW#TR | 功能描述:IC MANAGER BATTERY SYS 48-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1760CFW#TRPBF | 功能描述:IC MANAGER BATTERY DUAL 48TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。