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参数资料
| 型号： | MAX846AEEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC SYS BAT CHRG 16-QSOP |
| 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： | 多化学 |
| 电源电压： | 3.7 V ~ 20 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
Cost-Saving Multichemistry
Battery-Charger System
DCIN
I BATT
( 0.165V )
EXTERNAL PASS TRANSISTOR
CAN BE EITHER PNP OR PMOS FET.
3.7V TO 20V
R CS
10nF
4.7 μ F
R DRV
660 ?
CS+
CS-
DRV
BATT
VL
R VSET
ADJUST
DCIN
VSET
(UP)
(DOWN)
VL
MAX846A
100k
10k
PWROK
ON
ISET
R ISET
0.01 μ F
CCI
VL
4.7 μ F
0.01 μ F
CCV
OFFV
GND
PGND
CELL2
(2 CELLS)
(1 CELL)
Figure 2. Stand-Alone Li-Ion Charger
V X ? V F ?
?
?
?
? V F ? 4.2 ?
?
?
R VSET = 20k ?
1.65
? 4.2 ?
? ?
? Calculate R CS and R ISET as follows:
R CS = V CS / I BATT
R ISET (in k ? ) = 1.65V / V CS
where the recommended value for V CS is 165mV.
where VX is either GND or VL, and V F is the per-cell
float voltage. In the circuit of Figure 1, R VSET is
400k ? . R VSET and the internal 20k ? resistor form a
divider, resulting in an adjustment range of approxi-
mately ±5%.
The current-regulation loop attempts to maintain the
voltage on ISET at 1.65V. Selecting resistor R ISET deter-
mines the reflected voltage required at the current-
sense amplifier input.
? Connect ON to PWROK to prevent the charge current
from turning on until the voltages have settled.
Minimize power dissipation in the external pass transis-
tor. Power dissipation can be controlled by setting the
DCIN input supply as low as possible, or by making
V DCIN track the battery voltage.
Microprocessor-Controlled
Multichemistry Operation
The MAX846A is highly adjustable, allowing for simple
interfacing with a low-cost μC to charge Ni-based and
Li-Ion batteries using one application circuit (Figure 3).
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX846AEEE-TG074 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX846AEUE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX846EVKIT | 功能描述:电池管理 MAX846 EVAL KIT 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 |
| MAX846EVKIT+ | 功能描述:电池管理 Cost-Saving Multi-Chemistry Batttery-Charger System 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 |
| MAX847EEI | 功能描述:电池管理 1 Cell Step-Up 2-Way Pager System IC 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 |
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