LM3824MM-2.0 National Semiconductor, LM3824MM-2.0 Datasheet
LM3824MM-2.0
Specifications of LM3824MM-2.0
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LM3824MM-2.0 Summary of contents
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... The sense range is −1.0A to +1.0A or −2.0A to +2.0A. The sampling interval for this part is 6ms more precise mea- surement is required, please refer to LM3822 datasheet. Connection Diagram © 2000 National Semiconductor Corporation Key Specifications n Ultra low insertion loss (0.003 ) 5.5V supply range ± ...
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... Order No. Range ± LM3824MM-1.0 1.0A ± LM3824MMX-1.0 1.0A ± LM3824MM-2.0 2.0A ± LM3824MMX-2.0 2.0A * Current is sampled over a fixed interval. The average current during this interval is indicated by the duty cycle of the PWM output during next interval. Pin Description (High-Side, LM3824) Pin Name ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Absolute Maximum Supply Voltage Power Dissipation ESD Susceptibility (Note 3) Sense Current (peak, for 200 msec) (Note 4) Sink Current for PWM pin ...
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Common Device Parameters Unless otherwise specified 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is DD 0.1 µF. Symbol Parameter V Threshold Low Level for Logic High Level for ...
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Typical Performance Characteristics Measured Current vs Actual Current (LM3824-1.0) PWM Frequency vs Supply Voltage Operating Current vs Supply Voltage Supply bypass capacitor is 0.1 µF and filter capacitor is 0.1 µF. Measured Current vs Actual Current (LM3824-2.0) DS200007-24 PWM Frequency ...
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Typical Performance Characteristics 0.1 µF. (Continued) Operating Current vs Temperature Current vs PWM Duty Cycle Note 10: These curves represent a statistical average such that the noise is insignificant. Typical Application Circuits is used for bypassing, and the 0.1 µF ...
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Typical Application Circuits is used for bypassing, and the 0.1 µF ceramic capacitor between pins 3 and 4 is used for filtering. Shutdown (SD) is tied to V through resistor. (Continued) DD FIGURE 2. Paralleling LM3824 for ...
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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 ...
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PWM Output and Current Accuracy Offset The PWM output is quantized to 128 levels. Therefore, the duty cycle can change only in increments of 1/128. There is a one-half (0.5) quantization cycle delay in the out- put of the PWM ...
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Look-Up Tables The following tables show how to convert the duty cycle of the PWM output to a current value, and vice versa. The Sense Current (Imax = 1.0A) 1 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50 ...
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Timing Diagram Duty cycle of the PWM waveform during any sampling interval indicates the current magnitude (average) and direction during the previous sampling interval. FIGURE 6. Typical Timing Diagram for Mostly Positive Current DS200007-11 11 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...