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参数资料
| 型号： | MAX846AEEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/12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
P
DCIN
3.7V TO 20V
Li OR Ni
CS+
CS-
DRV
BATT
DCIN
ADC (MEASURE V(BATT))
CCI
CCV
MAX846A
ON
CELL2
OFFV
VSET
ISET
I/O (LOW = TURN OFF CHARGE)
I/O (HIGH = 2 Li CELLS)
I/O (HIGH = DISABLE FLOAT V)
PWM/DAC (CONTROL FLOAT V)
PWM/DAC (CONTROL CHARGE I)
ADC (MEASURE I BATT )
GND
VL
V DD
PGND
PWROK
Figure 3. Desktop Multichemistry Charger Concept
Component selection is similar to that of stand-alone
operation. By using DACs or μC PWM outputs, the float
voltage and charging current can be adjusted by the
μC. When a Ni-based battery is being charged, disable
the float-voltage regulation using the OFFV input. The
μC can also monitor the charge current through the
battery by reading the ISET output’s voltage using its
ADC. Similarly, the battery voltage can be measured
using a voltage divider from the battery.
Note that the μC only needs to configure the system for
correct voltage and current levels for the battery being
charged, and for Ni-based batteries to detect end-of-
charge and adjust the current level to trickle. The con-
troller is not burdened with the regulation task.
MICROCONTROLLER
RST
Float-voltage accuracy is important for battery life and
for reaching full capacity for Li-Ion batteries. Table 1
shows the accuracy attainable using the MAX846A.
For best float-voltage accuracy, set the DRV current to
1mA (R DRV = 660 ? for a PNP pass transistor).
High-Power Multichemistry
Offline Charger
The circuit in Figure 6 minimizes power dissipation in
the pass transistor by providing optical feedback to the
input power source. The offline AC/DC converter main-
tains 1.2V across the PNP. This allows much higher
charging currents than can be used with conventional
power sources.
10
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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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