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参数资料
| 型号： | MAX17049G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/19页 |
| 文件大小： | 0K |
| 描述： | IC FUEL/GAS GAUGE LI-ION 8TDFN |
| 标准包装： | 1 |
| 系列： | ModelGauge™ |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.5 V ~ 4.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（2x2） |
| 包装： | 管件 |
MAX17048/MAX17049
Micropower 1-Cell/2-Cell Li+ ModelGauge ICs
Battery Swap Detection
If V CELL falls below V RST , the IC quick-starts when V CELL
returns above V RST . This handles battery swap; the SOC
of the previous battery does not affect that of the new
one. See the Quick-Start and VRESET/ID Register (0x18)
sections.
Quick-Start
If the IC generates an erroneous initial SOC, the battery
insertion and system powerup voltage waveforms must
be examined to determine if a quick-start is necessary,
as well as the best time to execute the command. The IC
samples the maximum V CELL during the first 17ms. See
the Battery Insertion Debounce section. Unless V CELL is
fully relaxed, even the best sampled voltage can appear
greater or less than OCV. Therefore, quick-start must be
used cautiously.
Most systems should not use quick-start because the
ICs handle most startup problems transparently, such as
intermittent battery-terminal connection during insertion.
If battery voltage stabilizes faster than 17ms, as illus-
trated in Figure 6, then do not use quick-start.
The quick-start command restarts fuel-gauge calcula-
tions in the same manner as initial power-up of the IC.
If the system power-up sequence is so noisy that the
initial estimate of SOC has unacceptable error, the sys-
tem microcontroller might be able to reduce the error
V CELL
STEADY SYSTEM
by using quick-start. A quick-start is initiated by a rising
edge on the QSTRT pin, or by writing 1 to the quick-start
bit in the MODE register.
Power-On Reset (POR)
POR includes a quick-start, so only use it when the
battery is fully relaxed. See the Quick-Start section.
This command restores all registers to their default
values. After this command, reload the custom model.
See the CMD Register (0xFE) section.
Hibernate Mode
The ICs have a low-power hibernate mode that can
accurately fuel gauge the battery when the charge/
discharge rate is low. By default, the device automati-
cally enters and exits the hibernate mode according to the
charge/discharge rate, which minimizes quiescent current
(below 5 F A) without compromising fuel-gauge accuracy.
The ICs can be forced into hibernate or active modes. Force
the IC into hibernate mode to reduce power consumption in
applications with less than C/4-rate maximum loading. For
applications with higher loading, Maxim recommends the
default configuration of automatic control of hibernate mode.
In hibernate mode, the device reduces its ADC conver-
sion period and SOC update to once per 45s. See the
HIBRT Register (0x0A) section for details on how the IC
automatically enters and exits hibernate mode.
LOAD BEGINS
V CELL
BEST TIME TO
QUICK-START
V CELL HAS
FULLY RELAXED
STEADY
SYSTEM
LOAD BEGINS
TIME
VCELL HAS
FULLY RELAXED
TIME
INITIAL SAMPLE
DEBOUNCE WINDOW
QUICK-START DURING
THIS TIME SPAN
INITIAL SAMPLE
DEBOUNCE WINDOW
Figure 6. Insertion Waveform Not Requiring Quick-Start Command
Maxim Integrated
Figure 7. Insertion Waveform Requiring Quick-Start Command
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17049G+ | 功能描述:电池管理 Host-Side Modelgauge (2-Cell) 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 |
| MAX17049G+T10 | 功能描述:电池管理 Host-Side Modelgauge (2-Cell) 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 |
| MAX17049X+ | 功能描述:电池管理 Host-Side Modelgauge (2-Cell) WLCSP 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 |
| MAX17049X+T10 | 功能描述:电池管理 Host-Side Modelgauge (2-Cell) WLCSP 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 |
| MAX17050EVKIT# | 功能描述:电源管理IC开发工具 MAX17050 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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