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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)： | 9/14頁 |
| 文件大?。?/td> | 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 9
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
T H E O R Y O F O P E R A T I O N
B
ATTERY
C
HARGER
G
ENERAL
D
ESCRIPTION
The LX2205 is designed to charge a single cell Lithium
Ion or Lithium Polymer battery using two steps: a constant
current step followed by a constant voltage step. The basic
charger function uses the SYS pin as an input and BAT pin
as the output. The LX2205 charger has a programmable
maximum current (programmable by the resistor value
between the CCP pin and GND) which is the maximum
charging current during the Constant Current Mode of the
charging profile. The charger will terminate constant
voltage charging once the current drops below the taper
current setting (programmable by the resistor value between
CTP pin and GND).
Two step charger profile:
5
4
3
2
1
800
600
400
200
1000
Time
0
CHG Voltage
Battery Current
Battery Voltage
V
m
C
ONDITIONING
C
URRENT
C
HARGE
M
ODE
A conditioning current is applied to a battery that is
deeply discharged and has a terminal voltage less than 60%
of the constant voltage level. The conditioning current is
5% of the CCP programmable constant current level. Once
the battery terminal voltage exceeds the 60% level, the full
constant current level is applied (unless charging current is
limited by one of the other charger control loops).
C
HARGE
T
ERMINATION
M
ODE
To increase system battery life and avoid float charging,
the LX2205 disconnects the charger once the battery has
been fully charged. The charge termination state occurs at
the end of constant voltage mode. The charge status
indicators change state when charging is completed.
STATES
CHG
DONE
Charge in process
Charge completed
Input power removed
ON
OFF
OFF
OFF
ON
OFF
Using the taper current to terminate the charge cycle is
particularly advantageous in an isolated battery topology
such as the LX2205, because when an external power
source is applied to the appliance with the appliance turned
on, the power to the appliance and the power to the battery
take separate paths. This separate path allows the battery
charge current to be monitored accurately. Compared with
charger controllers that rely on a fixed timeout period
terminating by taper current allow for the shortest possible
battery charge time.
T
OP
O
FF
C
HARGE
M
ODE
Once the charger has completed a charge cycle, if power
remains applied, the LX2205 enters a voltage monitoring
mode. In this mode the LX2205 monitors the battery
terminal voltage and applies a top off charge if the battery
voltage drops by more than 3% of V
CVL
. This feature is
especially important for charging systems in equipment
where usage is infrequent.
USB
C
HARGE
M
ODE AND
C
URRENT
L
IMIT
The LX2205 is fully compliant with, and supports, the
USB specifications – the Low Power Peripheral (100mA)
and High Power Peripheral (500mA). The UCL logic input
selects the USB charge current level. The LX2205 senses
the current flowing from the USB terminal to the SYS
terminal. The LX2205 will first try to reduce the
combined USB load by scaling back the battery charging
current. Once the charger has scaled back the charge
current to zero, if the load demands more current than the
USB bus can supply the V
SYS
voltage will drop down to the
battery voltage level and the battery will supply the
additional current demand. This is illustrated in the
following two charts.
Battery Current with 500mA USB Current Limit
-400
-300
-200
-100
0
100
200
300
400
500
600
0
200
400
600
800
System Load Current (mA)
B
USB Limit
Battery
相關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 |
相關代理商/技術參數(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 |
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