数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

LM3822MMX-1.0 数据表(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM3822MMX-1.0
功能描述  Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM3822MMX-1.0 数据表(HTML) 8 Page - National Semiconductor (TI)

Back Button LM3822MMX-1.0 Datasheet HTML 4Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 5Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 6Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 7Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 8Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 9Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 10Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 11Page - National Semiconductor (TI) LM3822MMX-1.0 Datasheet HTML 12Page - National Semiconductor (TI)  
Zoom Inzoom in Zoom Outzoom out
 8 / 12 page
background image
Product Operation
The current is sampled by the delta-sigma modulator, as il-
lustrated in
Figure 4. The pulse density output of the
delta-sigma modulator is digitally filtered. The digital output
is then compared to the output of a digital ramp generator.
This produces a PWM output. The duty cycle of the PWM
output is proportional to the amount of current flowing. A duty
cycle of 50% indicates zero current flow. If the current is flow-
ing in positive direction, the duty cycle will be greater than
50%. Conversely, the duty cycle will be less than 50% for
currents flowing in the negative direction. A duty cycle of
95.5% (4.5%) indicates the current is at I
MAX (−IMAX). The IC
can sense currents from −I
MAX to +IMAX. Options for IMAX are
1.0A or 2.0A. The sense current is given by:
I
SENSE = 2.2 (D−0.5)(IMAX)
where D is the duty cycle of the PWM waveform, and I
MAX is
the full scale current (1.00A or 2.00A). Similarly, the duty
cycle is given by:
D=[I
SENSE/(2.2 IMAX)] + 0.5
For quick reference, see the Conversion Table in
Table 1.
In this IC, the current is averaged over 50 msec time slots.
Hence, momentary current surges of less than 50 msec are
tolerated.
This is a sampled data system which requires an
anti-aliasing filter, provided by the filter capacitor.
The delta-sigma modulator converts the sensed current to
the digital domain. This allows digital filtering, and provides
immunity to current and noise spikes. This type of filtering
would be difficult or impossible to accomplish on an IC with
analog components.
The user also needs to specify the full scale value. See the
Ordering Information table for details.
DS101249-10
FIGURE 4. Functional block diagram of LM3822
www.national.com
8


类似零件编号 - LM3822MMX-1.0

制造商部件名数据表功能描述
logo
National Semiconductor ...
LM382 NSC-LM382 Datasheet
163Kb / 3P
   Low Noise Dual Preamplifier
LM3820 NSC-LM3820 Datasheet
118Kb / 4P
   AM RADIO SYSTEM
LM3820N NSC-LM3820N Datasheet
118Kb / 4P
   AM RADIO SYSTEM
LM3820N NSC-LM3820N Datasheet
132Kb / 6P
   AM Radio System
LM3820 NSC-LM3820_89 Datasheet
132Kb / 6P
   AM Radio System
More results

类似说明 - LM3822MMX-1.0

制造商部件名数据表功能描述
logo
National Semiconductor ...
LM3824 NSC-LM3824 Datasheet
265Kb / 12P
   Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output
LM3812 NSC-LM3812 Datasheet
258Kb / 14P
   Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
LM3814 NSC-LM3814_05 Datasheet
708Kb / 14P
   Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
LM3814 NSC-LM3814 Datasheet
264Kb / 14P
   Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
logo
Linear Technology
LTC6102 LINER-LTC6102_15 Datasheet
397Kb / 26P
   Precision Zero Drift Current Sense Amplifier
LTC6102-1 LINER-LTC6102-1_15 Datasheet
397Kb / 26P
   Precision Zero Drift Current Sense Amplifier
LTC6102HV LINER-LTC6102HV_15 Datasheet
397Kb / 26P
   Precision Zero Drift Current Sense Amplifier
logo
Ohmite Mfg. Co.
CS3FR050E OHMITE-CS3FR050E Datasheet
99Kb / 1P
   Wire Element Four Terminal Precision Current Sense
CS3 OHMITE-CS3 Datasheet
328Kb / 2P
   Wire Element Four Terminal Precision Current Sense
logo
Linear Technology
LTC6102 LINER-LTC6102 Datasheet
250Kb / 20P
   Precision Zero Drift Current Sense Amplifi er
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com