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參數(shù)資料
| 型號(hào)： | LTC4150 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | Coulomb Counter/ Battery Gas Gauge |
| 中文描述： | 庫侖計(jì)/電池電量計(jì) |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 136K |
| 代理商： | LTC4150 |
LTC4150
10
4150fa
Figure 8 shows a typical application designed for a single
cell lithium-ion battery and 500mA maximum load current.
Use Equation 1 to calculate R
SENSE
= 0.05V / 0.5A = 0.1
.
With R
SENSE
= 0.1
, Equation 7 shows that each interrupt
corresponds to 0.085mAh. Equation 14, derived from
Equation 2, gives the number of INT assertions for average
battery current, I
BATT
, over a time, t, in seconds:
INT Assertions = G
VF
I
BATT
R
SENSE
t
Loading the battery so that 51.5mA is drawn from it over
600 seconds results in 100 INT assertions. For an 800mAh
battery, this is (51.5mA 1/6h) / 800mAh = 11% of the
battery’s capacity.
(14)
PC BOARD LAYOUT SUGGESTIONS
Keep all traces as short as possible to minimize noise and
inaccuracy. The supply bypass capacitor C2 should be
placed close to the LTC4150. The 4.7
μ
F filter capacitor C
F
should be placed close the C
F+
and C
F–
pins and should be
a low leakage, unpolarized type. Use a 4-wire Kelvin sense
connection for the sense resistor, locating it close to the
LTC4150 with short sense traces to the SENSE
+
and
SENSE
–
pins and longer force lines to the battery pack and
powered load, see Figure 7.
APPLICATIU
W
U
U
4150 F07
PIN 1
TO BATTERY
TO CHARGER
LTC4150
R
SENSE
Figure 7. Kelvin Connection on SENSE Resistor
TYPICAL APPLICATIO S
With a microcontroller supply = 5V, Equation 11 gives
R
L
> 2.875k. The nearest standard value is 3k.
From Equation 12, R
L
= 3k gives R1 + R2 equal to 150.5k.
A single cell lithium-ion battery can discharge as low as
2.7V.
From Equation 13, select R1 = 75k; the nearest standard
value for R2 is 76.8k.
Also from Equation 13, we choose R3 = 75k and R4 =
76.8k.
INT
CLR
V
DD
SENSE
+
SENSE
–
C
F+
SHDN
SHUTDOWN
R4
76.8k
R3
75k
POL
LTC4150
μ
P
C2
4.7
μ
F
R
L
3k
10
9
8
7
6
1
2
3
5
4150 F08
GND
R
L
3k
5.0V
POWER-DOWN
SWITCH
C
L
47
μ
F
LOAD
C
F–
4
C
F
4.7
μ
F
SINGLE-CELL
Li-Ion
3.0V ~ 4.2V
R
SENSE
R2
76.8k
R1
75k
+
Figure 8. Typical Application, Single Cell Lithium-Ion Battery
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4150IMS | Coulomb Counter/ Battery Gas Gauge |
| LTC4210-2IS6 | Microprocessor Crystal; Frequency:32.768MHz; Frequency Tolerance:20ppm; Load Capacitance:18pF; Crystal Terminals:Radial Leaded; ESR:25ohm; Leaded Process Compatible:Yes; Mounting Type:Through Hole; No. of Pins:2 RoHS Compliant: Yes |
| LTC4210-1IS6 | Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC4210-2CS6 | Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC4210-1 | Hot Swap Controller in 6-Lead SOT-23 Package |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4150_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Coulomb Counter/ Battery Gas Gauge |
| LTC4150CMS | 功能描述:IC COUNTER/GAUGE GAS/BATT 10MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4150CMS#PBF | 功能描述:IC COUNTER/GAUGE GAS/BATT 10MSOP 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(cè)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 |
| LTC4150CMS#PBF | 制造商:Linear Technology 功能描述:Battery Management IC |
| LTC4150CMS#TR | 功能描述:IC COUNTER/BATT GAS GAUGE 10MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
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