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LM3824

Features: *No external sense element required*PWM output indicates the current magnitude and direction*PWM output is easily interfaced with microprocessors and controllers*Precision current-sense technique*Low temperature sensitivity*Internal filtering rejects false trips*Internal Power-On-Reset ...

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SeekIC No. : 004395462 Detail

LM3824: Features: *No external sense element required*PWM output indicates the current magnitude and direction*PWM output is easily interfaced with microprocessors and controllers*Precision current-sense t...

LM3824 Data Sheet

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Part Number:
LM3824
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

*No external sense element required
*PWM output indicates the current magnitude and direction
*PWM output is easily interfaced with microprocessors and controllers
*Precision current-sense technique
*Low temperature sensitivity
*Internal filtering rejects false trips
*Internal Power-On-Reset (POR)
*DC Offset is less than 8 mA for 1A part




Application

Battery charge/discharge gauge
Motion control diagnostics
Power supply load monitoring and management
Resettable smart fuse




Pinout

Connection Diagram




Specifications

Absolute Maximum Supply Voltage5.5V
Power Dissipation(Note 2)
ESD Susceptibility (Note 3) 1.5 kV
Sense Current (peak, for 200 msec) (Note 4) 10A
Sink Current for PWM pin1mA
Maximum Junction Temperature 150
Storage Temperature-65 to +150
Lead Temperature (Soldering, 10 sec) 260


Sense Current Range (+/-) 1, 2 Amp
Sense Element Resistance 0.003 Ohm
Sense Accuracy 6, 3 %
Sensing Type High side
Sampling Interval 0.006 sec
Input Min Voltage 2 Volt
Input Max Voltage 5.25 Volt
Iq in Shutdown (typ) 0.0018 mA
Switching Frequency 0.160 kHz
Watchdog No
On/Off Pin Yes
Temperature Min -40 deg C
Temperature Max 85 deg C
RegType Current Gauge
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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 haveapulse-widthmodulated(PWM)outputwhichindicates 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.






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