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参数资料
| 型号： | LX2207ILD-TR |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
| 封装： | ROHS COMPLIANT, PLASTIC, MLPD-12 |
| 文件页数： | 2/14页 |
| 文件大小： | 399K |
| 代理商： | LX2207ILD-TR |
LX2207
PRODUCTION DATA SHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
Copyright
2007
Rev. 1.0a, 2007-10-08
WWW
.Microse
m
i
.CO
M
Three Level Lithium Ion Battery Charger
TM
APPLICATION NOTE
POWER STATUS INDICATORS
The STAT pin is designed to source or sink current.
LEDs can be configured to indicate charging or battery full.
The battery full indicator can be connected to DCOK rather
than GND to insure it is off when the input power is
removed and the STAT pin and DCOK pin go to a high
impedance state.
Conditions
STAT
Charge in process
Low
Charge completed
High
INPUT POWER SOURCE DETECTION
In order to detect when the input power source has been
removed, the LX2207 requires that a small current (up to
200uA) momentarily flow out of the IN pin (in the reverse
direction). Once detected, the reverse IN current is shut off
(the IN pin becomes a very high impedance until an input
power source is later reapplied). In most applications, there
is sufficient loading on the IN pin from external circuitry to
accomplish this, which includes the “Full” and/or “Power
On” LED loads and the TFB resistor string. If there is no
external load on the IN pin, then it is recommended to
provide a 15k resistor from IN to GND as shown below.
Adapter or USB
0.47uF
1k
IN
CMP
LX2207
15k
CHARGING PROFILE
CONDITIONIN G CURRENT
Battery Charging USB High Level
3.90
3.95
4.00
4.05
4.10
4.15
4.20
4.25
0.0
60.0
120.0
Time in minutes
B
a
tt
er
y
V
o
lt
ag
e
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
B
a
tte
ry
C
u
re
n
t
Vbat
Ibat
Conditioning Current vs IHCP
0
10
20
30
40
50
60
0.00
50.00
100.00
150.00
IHCP (in uA)
C
o
ndi
ti
oni
ng
C
u
rr
e
n
t(
in
mA
)
CC
HH
AA
RR
TT
SS
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