- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377789 > LX2205 (Microsemi Corporation) 1A Li-Ion Battery Charger with Power Source Management PDF資料下載
參數(shù)資料
| 型號： | LX2205 |
| 廠商： | Microsemi Corporation |
| 英文描述： | 1A Li-Ion Battery Charger with Power Source Management |
| 中文描述： | 1A條鋰離子電池充電器與電源管理 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大小： | 331K |
| 代理商： | LX2205 |
LX2205
P
RODUCTION
D
ATA
S
HEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 12
Copyright
2007
Rev. 1.0a, 2007-03-02
W
M
.
C
1A Li-Ion Battery Charger with Power Source Management
TM
L
X
2
2
0
5
A P P L I C A T I O N N O T E
B
ATTERY
T
EMPERATURE
M
ONITOR
The LX2205 has an input to monitor the battery
temperature during battery charging. The SYS voltage
must be used to bias this circuitry. During the occurrence of
a TMP fault, the charge cycle is suspended; however the
status indicators state remains unchanged.
A typical Lithium Ion battery should only be charged
within a temperature range of 0°C to 60°C. For this
calculation example, a Vishay NTHS0402N01N1003J
thermistor was used. This thermistor has the value of
327k
at 0°C, 100k
at 25°C and 24.9k
at 60°C. The
thermistor must be biased with a Thevenin voltage source
and series resistance to achieve the proper TMP thresholds.
A fixed value resistor is added in series with the thermistor
to prevent it from becoming too low impedance at high
temperatures and causing the TMP input to default to off.
Using a value of R
MIN
that is the thermistor high
temperature trip resistance value works well; therefore, for
this example, set the value of R
MIN
to:
12.4k =
2
60
C
°
T
MIN
R
R
=
=
.
This has the effect of adding a fixed 12.4k to the
thermistor resistance values so it becomes 339k
at 0°C,
112k
at 25°C and 37.3k
at 60°C.
The equations for R
TH
and V
TH
are, using Cold
Temperature Fault Threshold average of 74% and the Hot
Temperature Fault Threshold average of 29% of V
SYS
:
74
.
29
.
×
°
=
K
K
R
TH
1
74
.
(
) (
)
(
.
)
916
.
74
.
29
60
0
60
0
=
=
×
×
×
=
°
=
°
=
°
=
R
R
R
R
V
V
C
T
C
T
C
T
C
T
SYS
TH
k
R
C
T
6
80
0
=
×
=
°
=
To finish the design it is necessary to create the Thevenin
Voltage and resistance using a voltage divider from the
SYS pin.
The values of R1 and R2 can be calculated as:
R
R
1
=
k
K
TH
88
=
k
R
R
R
R
R
TH
TH
958
1
1
2
=
×
=
Actual standard 1% resistor values are: 953k and
88.7k. The final circuit for this example is:
V
SYS
88.7k
R
NTC
12.4k
TMP
953k
The TMP voltages with this circuit are:
TEMP (
°
C)
-20
0
25
60
80
RNTC
971k
327k
100k
24.9k
12.6k
VTMP (% VSYS)
85%
74%
53%
29%
22%
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LX2205ILQ | 1A Li-Ion Battery Charger with Power Source Management |
| LX2206 | Dual Level Lithium Ion Battery Charger |
| LX2206ILD | Dual Level Lithium Ion Battery Charger |
| LX2207 | Three Level Lithium Ion Battery Charger |
| LX2207ILD | Three Level Lithium Ion Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX2205 EVAL KIT | 制造商:Microsemi Corporation 功能描述:LINEAR - LITHIUM ION - Bulk |
| LX2205ILQ | 制造商:Microsemi Corporation 功能描述:LINEAR - LITHIUM ION - Bulk |
| LX2206 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Dual Level Lithium Ion Battery Charger |
| LX2206 EVAL KIT | 制造商:Microsemi Corporation 功能描述:LINEAR - LITHIUM ION - Bulk |
| LX2206_07 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:TM Dual Level Lithium Ion Battery Charger |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。