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參數資料
| 型號： | LM3824MMX-1.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 265K |
| 代理商： | LM3824MMX-1.0 |
LM3824
Precision Current Gauge IC with Internal Zero Ohm
Sense Element and PWM Output
General Description
The LM3824 Current Gauge provides easy to use precision
current measurement with virtually zero insertion loss (typi-
cally 0.003
). The LM3824 is used for high-side sensing.
A Delta Sigma analog to digital converter is incorporated to
precisely measure the current and to provide a current aver-
aging function. Current is averaged over 6 msec time peri-
ods in order to provide immunity to current spikes. The ICs
have a pulse-width modulated (PWM) output which indicates
the current magnitude and direction. The shutdown pin can
be used to inhibit false triggering during start-up, or to enter
a low quiescent current mode.
The LM3824 is factory-set in two different current options.
The sense range is 1.0A to +1.0A or 2.0A to +2.0A. The
sampling interval for this part is 6ms. If a more precise mea-
surement is required, please refer to LM3822 datasheet.
Key Specifications
n
Ultra low insertion loss (0.003
)
n
2V to 5.5V supply range
n ±
3% accuracy at room temperature for the 1A device
(includes accuracy of the internal sense element)
n
Low quiescent current in shutdown mode
(typically 1.8 A)
n
6 msec sampling interval
n
In MSOP-8 Package
Features
n
No external sense element required
n
PWM output indicates the current magnitude and
direction
n
PWM output is easily interfaced with microprocessors
and controllers
n
Precision
Σ current-sense technique
n
Low temperature sensitivity
n
Internal filtering rejects false trips
n
Internal Power-On-Reset (POR)
n
DC Offset is less than 8 mA for 1A part
Applications
n
Battery charge/discharge gauge
n
Motion control diagnostics
n
Power supply load monitoring and management
n
Resettable smart fuse
Connection Diagram
DS200007-1
Top View
LM3824 for High-Side Sensing
July 2000
LM3824
Precision
Current
Gauge
IC
with
Internal
Zero
Ohm
Sense
Element
and
PWM
Output
2000 National Semiconductor Corporation
DS200007
www.national.com
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相關代理商/技術參數 |
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| LM3824MMX-2.0 | 功能描述:IC CURRENT GAUGE PRECISION 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩流/電流管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
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| LM382N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual Audio Preamp |
| LM383 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Noise PREAMPLIFIER FOR TAPE PLAYBACK SYSTEMS//7 WATT AUDIO POWER AMPLIFIER |
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