- 您现在的位置：买卖IC网 > PDF目录17121 > MAX1898EUB41+T (Maxim Integrated Products)IC CHARGER LI+ SNGL 10-UMAX PDF资料下载
参数资料
| 型号： | MAX1898EUB41+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI+ SNGL 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.5 V ~ 12 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
Linear Charger for Single-Cell Li+ Battery
power is present at IN. If there is no (or insufficient)
voltage at IN, EN/OK will remain low and the charger
will remain off.
5V TO 12V
220nF
Battery Drain Current
CS
10
The MAX1898 uses advanced CMOS circuitry to com-
pletely monitor battery state, while drawing minimal current
from the cell itself. When the input voltage is less than the
battery, battery drain is typically 3μA. When input power is
1 IN
DRV
BATT
9
7
present and charging is complete (the charge timer
CHARGE LED
10 μ F
Li+ CELL
expires), battery drain is then typically 40μA. This current
may be reduced to 4μA by disabling the restart feature.
Applications Information
The MAX1898 basic application circuit is shown in
Figure 4.
INDICATOR
INPUT POWER
OK OUTPUT OR
ENABLE INPUT
2
3
6
CHG
EN/OK
RSTRT
MAX1898
GND
CT
ISET
5
4
C CT , 100nF CAPACITOR
SETS CHARGE TIME
TO 3hr
OUTPUT VOLTAGE
PROPORTIONAL
TO CHARGE CURRENT
8
R SET SETS
5V TO 12V
100nF
CHARGE
CURRENT
CS
10
Figure 5. Application Circuit with PNP Pass Transistor
1 IN
DRV
9
C CT [ nF ] = 34 . 33 × t CHG [ hours ]
CHARGE LED
INDICATOR
INPUT POWER
OK OUTPUT OR
ENABLE INPUT
2
3
6
CHG
EN/OK
RSTRT
MAX1898
GND
8
BATT
CT
ISET
7
5
4
10 μ F Li+ CELL
C CT , 100nF CAPACITOR
SETS CHARGE TIME
TO 3hr
OUTPUT VOLTAGE
PROPORTIONAL
TO CHARGE CURRENT
R SET SETS
CHARGE
where:
t CHG = nominal charge time limit in hours.
The maximum charge timer is intended as a safety timer.
It is normally not intended to be part of the charge-con-
trol loop. When charging a Li+ cell at a 1C rate, normal
charge time is approximately 1.5 hours, but this may
have wide variations that depend on temperature and
cell type. In most cases, 3 hours is recommended for the
maximum charge time limit when fast-charging at 1C so
CURRENT
Figure 4. Basic Application Circuit
An LED can be added as a charge-state indicator. A
10μF bypass capacitor must be added to the BATT pin.
A Schottky diode should be added between the exter-
nal transistor drain/collector and BATT, to avoid battery
discharge in the event of an input source short circuit.
Figure 5 shows a charger circuit using an external PNP
pass transistor.
Selecting Maximum Charge Time
The maximum charge time can be set with an external
capacitor connected from CT to GND. Select the timing
capacitor using:
that normal-charging is never interrupted by the charge
timer. Consult the battery manufacturer for details on rec-
ommended timer settings.
The charge safety timer may also be completely dis-
abled by connecting CT to ground. Note: If the charge
timer is disabled, both the restart function and prequali-
fication fault indication are also disabled. Only the indi-
cation (blinking LED) is disabled, the prequalification
function itself is not modified.
Controlling Automatic Restart
The MAX1898 features automatic restart that resumes
charging when the cell voltage drops to a predetermined
level. In most timed chargers, once charging times out,
subsequent loading of the battery can discharge the bat-
tery and charging will not resume unless the charger is
restarted by an outside signal. By automatically resuming
charging when the battery voltage drops, the MAX1898
ensures that the cell does not remain partially charged
_______________________________________________________________________________________
9
相关PDF资料 |
PDF描述 |
|---|---|
| 0210390882 | CABLE JUMPER 1MM .102M 19POS |
| AG003-01 | ASSEMBLY CURRENT SENSOR EVAL |
| 33220C | INDUCTOR 22UH 5.1A T/H TOROID |
| GSC17DREH | CONN EDGECARD 34POS .100 EYELET |
| GBC28DREI | CONN EDGECARD 56POS .100 EYELET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1898EUB42 | 功能描述:电池管理 Linear Charger for 1-Cell Li+ Battery RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1898EUB42+ | 功能描述:电池管理 Linear Charger for 1-Cell Li+ Battery RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1898EUB42+T | 功能描述:电池管理 Linear Charger for 1-Cell Li+ Battery RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1898EUB42-T | 功能描述:电池管理 Linear Charger for 1-Cell Li+ Battery RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1898EVKIT | 功能描述:电池管理 Evaluation Kit for the MAX1898 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。